U.S. PATENT AND TRADEMARK OFFICE
Information Products Division |
U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
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Class 313
ELECTRIC LAMP AND DISCHARGE DEVICES
Class Definition:
This is the generic class for electric lamp and electric
space discharge device structure.
Examples of such devices are electric incandescent lamps, gas
or vapor filled electric discharge tubes, including lamps,
mercury arc devices, vacuum discharge tubes, radio tubes,
cyclotrons, cathode-ray tubes, photosensitive discharge
devices, secondary emission electron multipliers, spark
plugs, and open air arc and spark devices.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
For specific class references where not provided in the
sections below, see References to Other Classes that refer to
the particular section title.
A. LAMPS AND DISCHARGE DEVICE STRUCTURE CLASSIFIED
ELSEWHERe
1. X-ray Tubes And Targets - See References to Other
Classes.
2. Insulators With Arcing Devices - See References to Other
Classes.
3. Lightning Arresters - Class 313 includes lightning
arresters where the only structure is an arc or spark gap.
Excluded are lightning arresters which include an arc or
spark gap in combination with an impedance element such as a
resistance, or inductance. Also excluded are arc or spark
gap arresters in combination with a circuit maker or breaker
such as a thermostatic switch or fuse. Excluded from Class
313 are the lightning arresters of the arc or spark gap type
which are designed to have the electrodes brought into
physical contact upon a prolonged discharge or which are
provided with a material, such as, a fusible substance which
melts and flows between the electrodes to short-circuit the
electrodes upon a prolonged discharge.
Among the excluded types of lightning arresters is the type
including a mass of particulate particles, each particle
being insulated from the other, usually by a coating upon the
surface of the particle. When a discharge passes from
particle to particle, the surface material becomes conductive
making a short-circuit through the mass. If the particles
remain conductively insulated and the current is transmitted
through the mass of particles by the arc or spark, then the
device is included within the scope of Class 313.
For the excluded types of lightning arresters see References
to Other Classes, below.
4. Electric Lamp Provided With Structure For Holding A
Material To Be Heated - See References to Other Classes.
5. Molecular Or Atomic Beam Devices - See References to
Other Classes.
6. Mass Spectrometers- See References to Other Classes.
7. Electron Microscopes- See References to Other Classes.
8. Cathode Ray Oscillographs- See References to Other
Classes.
9. Consumable Electrode Discharge Devices (E.g., Arc Lamps,
Etc.)- See References to Other Classes.
10. Lamps And Discharge Devices Having A Circuit Element
Included Therein
An electromagnet connected in circuit with an electrode does
not prevent classification of a lamp or space discharge
device in Class 313 if the electromagnet is an operator for
moving an electrode or if the electromagnet generates a
magnetic flux which influences the operation of the lamp or
space discharge device (see Subclass References to the
Current Class, below). The inherent resistance of an
electrode, although significant to the operation of the
device, is not considered a circuit element such as would
prevent classification in Class 313. Also See References to
Other Classes.
11. Discharge Devices Structurally Combined With And In
Circuit Relation With Incandescent Lamps- See References to
Other Classes.
12. Discharge Devices Having The Cathode Heater Or Other
Structurally Combined Heater In Circuit Relation Therewith-
See References to Other Classes.
13. Gas Pumps And Fans- See References to Other Classes.
B. LAMP AND DISCHARGE DEVICE SYSTEMS
This class does not include electric systems for supplying
electric current and/or potential to electric lamps or to
discharge devices.
Patents which claim a lamp or discharge device having
electrodes which are adapted to have current or potential
impressed upon the electrodes or which claim a lamp or
discharge device with means recited broadly (no specific
means, such as a battery, source etc.., being included) to
impress current or potential on the electrodes are classified
in this class as lamps or discharge devices unless some
circuit elements are claimed which positively limit the
claims to a system rather than to a lamp or discharge device,
per se. However, where the relative potentials between the
electrodes are claimed, the patent is classified as a
system.
For example, a claim to a discharge device having an anode
adapted to be maintained at a high positive potential, a
control electrode adapted to be maintained at a low negative
potential, and a cathode adapted to be maintained at ground
potential will be excluded from this class and will be found
in the appropriate system class.
For discharge devices and lamp systems, see References to
Other Classes, below.
C. METHOD OF OPERATING LAMPS OR DISCHARGE DEVICE
Patents which claim a method of operating a lamp or discharge
device are excluded from this class and will be found in the
class which provides for the system which is required to
operate the device. See above for the classification of
electric lamp and discharge device systems. Also See
References to Other Classes, below.
D. METHODS AND APPARATUS FOR SUBJECTING OBJECTS, ARTICLES
AND MATERIALS TO RAY ENERGY OR ELECTRONS OR IONS GENERATED BY
DISCHARGE DEVICES OR LAMPS
Class 313 does not include either processes or apparatus for
subjecting materials, articles or objects to the ray energy
(e.g., ultraviolet light, X-rays, etc..) or to electrons,
ions, arcs or sparks generated by electric lamps or discharge
devices.
For such methods and apparatus, see References to Other
Classes, below.
E. COMBINED WITH A SUPPORT
Where the support is a casing, jacket, electrical connector
(e.g., socket) or includes means for modifying the
temperature of the lamp or discharge device, see below.
Lamps including discharge device lamps combined with a
supporting means for the lamp are excluded from Class 313.
Class 313 is the generic class for discharge devices in
combination with supporting means for the discharge device.
Also See References to Other Classes, below.
F. COMBINED WITH TEMPERATURE MODIFYING MEANS
1. With Enclosing Casing Or Jacket:
Class 313 is a generic class for all discharge devices where
significant discharge device structure is claimed in
combination with a jacket, casing or enclosure having means
to modify the temperature of the discharge device. (See
Subclass References to the Current Class, below.)
Included in Class 313 are all lamps, per se, and discharge
devices, per se, which are provided with a double walled
envelope or two sealed enclosing envelopes, the second
envelope being an integral part of the lamp or discharge
device structure, the space between the two envelope portions
being evacuated or filled with heat transfer or insulating
means to modify the temperature of the lamp or discharge
device. (See Subclass References to the Current Class,
below.)
See References to Other Classes, below.
2. Lamp, Discharge Devices, And Envelopes Therefor With
Temperature Modifying Means
Class 313, provides for all lamp and discharge device
structures, per se, where significant lamp or discharge
device structure is claimed and which include means for
modifying the temperature of the lamp or discharge device,
excepting lamps and discharge devices of the consumable
electrode type which are classified elsewhere. (See
References to Other Classes, below.)
See above when the lamp or discharge device is provided with
a separable casing, jacket, or enclosure and which include
means to modify the temperature of the lamp or discharge
device, and also see above with respect to photocells
provided with temperature modifying means where no
significant photocell structure is claimed.
See Class 313 for lamp and discharge device structure which
include means for modifying the temperature of the lamp or
discharge device. Included are lamp and discharge devices,
per se, having heating means for raising the temperature of
the device, devices with electrodes provided with cooling
ducts or heat radiators, devices with means to modify the
temperature of the envelope, including double walled
envelopes or two sealed enclosing envelopes with a heat
conducting or heat insulating medium (including vacuum) in
the space between the two envelope walls, devices with heat
conducting or insulating members, etc.. Also included is the
structure of electrodes for lamps and discharge devices which
are provided with means to modify the temperature of the
electrode (e.g., electrodes with cooling fins, fluid ducts,
heat transmission means, etc..).
Excluded from Class 313 are mere envelopes, for electric
lamps or discharge devices provided with temperature
modifying means where no significant lamp or discharge device
structure is claimed.
Parts of lamps and discharge devices, such as electrode
clamps or electrical connectors provided with heat modifying
means are classified with the appropriate device, e.g., with
the clamp or connector, etc..
G. COMBINED WITH A SEPARABLE CASING, JACKET, SHIELD, OR
ENVELOPE PROTECTIVE MEANS
Where the lamp or discharge device and casing or jacket
includes means to modify the temperature of the lamp or
discharge device, see above.
See below with respect to the classification of lamps and
discharge devices provided with an envelope or a nonseparable
casing or jacket.
Class 313 is a generic class for the combination of
significant discharge device structure and a separable casing
jacket, shield or enclosure, or envelope protective means and
provides for all discharge devices other than lamps which are
not otherwise classified where significant discharge device
structure is claimed in combination with a casing, jacket,
shield, or envelope protective means. Included in Class 313
are all lamps which have a double wall envelope where the
second envelope which encloses the first envelope is
integrally united with the first envelope so that the two
envelope walls constitute an integral structure. Where the
second envelope wall is not integral with the lamp envelope,
that is, it is removable therefrom, the patent is excluded
from Class 313 and will be found elsewhere. The combination
of an envelope, box or housing (such as a lamp or discharge
device envelope) and either a separable or integral casing or
housing where electrical features are claimed is classified
elsewhere. (See References to Other Classes, below.)
See Class 313 for lamps and discharge devices which have an
integral double wall envelope; for discharge devices having
an envelope and a casing or jacket therefor; for where the
discharge device is provided with an electrical shield and
for other discharge devices provided with a casing or jacket.
(See Subclass References to the Current Class, below.)
Also See References to Other Classes.
H. COMBINED WITH OPTICAL DEVICE OR HAVING SPECIAL RAY
TRANSPARENT ENVELOPE (E.G., FILTER, REFLECTOR, LENS, LIGHT
DISTRIBUTOR OR MODIFIER LIGHT SHIELD, LIGHT SHADE,
ULTRAVIOLET RAY TRANSPARENT PORTION, OR LIGHT OBSCURING
MEANS).
Class 313 provides for all lamps and discharge devices which
have an integral part of the lamp an optical means combined
therewith or which are provided with an envelope at least a
portion of which is made of a glass or material especially
designed to transmit a particular portion of the spectrum,
such as ultraviolet, infrared, or only a restricted portion
of the visible spectrum. This includes lamps and discharge
devices with light filters, reflectors, refractors, etc..
within the envelope of the lamp or coated upon or forming a
part of the envelope of the lamp. See Class 313 for this art.
See this class (313) for lamps and discharge devices where
the claims are limited to the envelope being made of a glass
or other material (e.g., quartz) which transmits a particular
portion of the spectrum or a restricted portion of the
spectrum. (See Subclass References to the Current Class,
below.)
See below for the classification of envelopes, jackets, and
casings, per se, for lamps and discharge devices.
Class 313 does not provide for any discharge devices or lamps
where the optical device is separable from the lamp or
discharge device, that is, it is not an integral part of the
lamp or discharge device.
See References to Other Classes, below.
J. COMBINED WITH ELECTRICAL CONNECTOR STRUCTURE
Class 313 provides for the combination of all electric lamps
and discharge devices where significant lamp or discharge
device structure is recited in combination with an electric
connector for connecting the lamp or discharge device in an
electric circuit. See Class 313 where the lamp or discharge
device is combined with a separable or detachable electric
connector (e.g., a socket) and where the lamp or discharge
device is provided with an electrical connector which is a
part of the lamp or discharge device (e.g., a base on the
lamp). (See Subclass References to the Current Class,
below.)
1. Lamps And Discharge Devices Combined With A Separable
Electric Connector
This class (Class 313), Electric Lamp and Discharge Devices)
provides for the combination of an electrical lamp with a
base or socket including a filament, or other reference to
electrodes of the lamp.
See References to Other Classes.
2. Lamps And Discharge Devices Which Include Electrical
Connector Structure
For reference to lamps and discharge devices with a base,
where no electrical connector structure is involved, see
below and References to Other Classes.
3. Electrodes Combined With Connector Structure
Class 313 includes all electrodes for electric lamps and
discharge devices where significant lamp or discharge device
electrode structure is claimed in combination with an
electrical connector for the electrode, or where the
electrode is provided with electrical connector structure.
Merely reciting that the electrode is a metallic or
nonmetallic rod or wire, or that the electrode has a
particular cross-section where the connector is attached to
the connector is not considered to be significant electrode
structure.
See References to Other Classes, below.
K. ENVELOPES, CASINGS AND JACKETS FOR LAMPS AND DISCHARGE
DEVICES
Class 313 provides for the combination of electric lamps and
discharge devices which are provided with a envelope, and for
electric lamps and discharge devices which are provided with
a casing or jacket which is an integral part of the lamp or
discharge device. Class 313 provides for lamps and discharge
devices where the claims are limited to the envelope being
made of a glass or other material (e.g., quartz) which
transmits a particular portion of the spectrum or a
restricted portion of the spectrum. See Class 313 for lamps
and discharge devices with envelopes, and for discharge
devices and lamps with casings or jackets. (See Subclass
References to the Current Class, below.)
See discharge devices which are provided with separable
casing, jacket, shield or envelope protective means, and
References to Other Classes, below.
1. With Attached Base
Where the attached base includes electrical connector means
see above and References to Other Classes, below.
2. With Lead-in Structure
Boxes, housings, and envelopes for electrical devices
including electric lamps and discharge devices where the box,
housing or envelope includes means to couple a conductor to
the box, housing, or envelope, or has means for passing a
lead-in conductor into the box or housing are classified
elsewhere. Boxes, housings, and envelopes which are provided
with other significant electrical structure or which are
claimed as having an electrical device therein where no
significant characteristics of the electrical device are
recited are elsewhere. (See References to Other Classes,
below.)
Note that if the lead-in conductors are of such rigidity to
form contacts (usually plug-type contacts), the device is
classified elsewhere unless significant structure of the
device in addition to the connector structure is recited as
pointed out above. Any specification of electric lamp or
discharge device structure in addition to naming the type of
lamp or discharge device will cause classification of the
patent in Class 313. Where the claims are drawn to an
electrical device broadly defined within the envelope, the
patent is classified elsewhere. Claims which are drawn to a
discharge device or electric lamp or a particular type, such
as a gas filled discharge device, or an incandescent lamp
where only envelope and lead-in structures are claimed are
classified elsewhere.
For lead-in and seal structure such as glass to metal seals,
see below.
3. With Identifying Indicating Mark- See References to Other
Classes.
4. Defined Only By Composition
Envelopes, jackets and casings which are defined only by
their composition will be found in the appropriate
composition class.- See References to Other Classes, below.
5. Structure- See References to Other Classes, below.
L. BUSHINGS, GLASS-TO-METAL SEALS AND LEAD-IN CONDUCTORS
See above for lamps and discharge devices which are provided
with electrical connector means such as a base having prongs
thereon and which sometimes include bushings or lead-in
conductors for conducting electricity through the wall of the
housing, jacket or envelope of the lamp or discharge device
to the electrodes within the casing, jacket or envelope. See
above for housings, jackets, and envelopes for electric lamps
and discharge devices which are provided with lead-in or
bushing structure for passing electric current through the
wall of the housing, jacket, or envelope to the interior of
the device.
See References to Other Classes, below.
M. ELECTRODES AND SHIELDS
Class 313 provides for all electrodes and shields, per se,
excepting the consumption feed type electrodes classified
elsewhere. Class 313 includes electrodes and shields formed
of two or more parts with a joint therebetween where
significant electrode or shield structure is claimed.
Electrodes which are limited by claimed structure to use in
discharge devices (arc lamps) in which the feed or motion of
one of the electrodes towards the other is accomplished by
the destruction of the electrode or a portion thereof due to
the discharge are classified elsewhere. (See References to
Other Classes, below.)
Electrodes and shields which include no more structure than a
base having one or more coatings thereon are excluded from
Class 313. Merely naming the electrode or shield as a wire,
filament, rod, ribbon or strand is not sufficient structure
to cause classification in Class 313. Electrodes and shields
which are defined only by their composition are excluded from
this class. The excluded art relating to electrodes and
shields will be found in the classes listed below:
1. Electrodes And Shields With Joints Therebetween
Where the only structure of the electrode or shield recited
is that the electrode or shield is composed of two or more
parts with means to join the parts together, the patents will
be found in the appropriate class providing for the joint.
See References to Other Classes, below, for a reference to
the classes which provide for joint structure.
Where an electrical feature is claimed in addition to the
joint but no significant structure other than that required
to make the joint is recited, the patent will be found
elsewhere for the electrical connector structure. Where an
electrode is composed of two rod-like portions and one
portion is provided with a hollow screw threaded socket and
the other is provided with the screw threaded end to fit into
the socket, the patent is classified elsewhere. If the
structure includes means such as a portion of higher
electrical conductivity to insure good electrical contact
between the portions, the patent would be classified
elsewhere.
See References to Other Classes, below.
2. Coated Electrodes Or Shields And Compositions- See
References to Other Classes, below.
3. Methods And Apparatus For Manufacturing Electrodes- See
References to Other Classes, below.
N. FLUORESCENT AND PHOSPHORESCENT COATING AND COMPOSITIONS
Class 313 provides for electric lamps and discharge devices
where significant lamp or discharge device structure is
claimed which include as a part thereof a fluorescent or
phosphorescent material. See this class (313) for cathode-ray
tubes which have a fluorescent or phosphorescent target and
for other discharge devices and lamps having an electrode or
the envelope coated with or containing a fluorescent or
phosphorescent material, or which otherwise include as a part
thereof a fluorescent or phosphorescent material.
See References to Other Classes, below.
O. GETTERS AND GAS OR VAPOR GENERATING MATERIALS
Class 313, provides for all electric lamps and discharge
devices which have combined therewith a getter or a gas or
vapor generating material, irrespective of whether the getter
or gas or vapor generating means, is to be used during the
manufacture of the device, or to be used during the operation
of the device, or to be used as needed after the device has
been operated. Class 313 also provides for electrode
structure combined with containers or receptacles for the
getter or the gas or vapor generating material. For
electrodes which involve significant electrode structure with
a coating or a getter material thereon, see this class (313).
For the classification of electrodes which involve only a
base with a coating of a getter material thereon, or which
involves only an electrode defined by its compositions, see
above.
See Subclass References to the Current Class, below, and
References to Other Classes, below.
P. DEFLECTION AND FOCUSING MAGNETS
Magnets provided with a plurality of coils to deflect the
cathode ray in a plurality of directions, (e.g., vertically,
and horizontally) are classified elsewhere. Magnets for
focusing, concentrating or accelerating cathode rays even if
the magnet is provided with a plurality of separate coils are
elsewhere. Magnets for cathode-ray tubes which have a
plurality of coils to generate both a deflecting field and a
focusing, concentrating and/or accelerating field are
classified in Class 313.
See References to Other Classes, below.
Q. INFRARED RAY GENERATORS
Class 313 does not provide for devices for converting
electrical energy into infrared ray energy, excepting in
special cases. Many lamps and discharge devices inherently
generate infrared ray energy in their operation. Class 313
will take therefore, electric lamps and discharge devices
which are stated to be for the purpose of generating infrared
ray energy when such lamps and discharge devices are
substantially identical in structure with lamps and discharge
devices intended to generate visible light or ultraviolet
light or other analogous ray energy. Class 313 will take
such devices even though the device includes means for
preventing light energy other than the infrared ray energy
from being emitted, such as having the envelope wall formed
of an opaque material. Such infrared ray generators are
classified in Class 313 in the subclasses providing for the
structure of the analogous lamp or discharge device, see
especially where the lamp or discharge device has an envelope
made of the material which is especially transparent to
infrared ray energy and where the lamp or discharge device is
provided with a light obscuring means such as an opaque
coating on the envelope wall. (See Subclass References to
the Current Class, below.)
Class 313 does not provide for the infrared generator in
combination with a reflector, guard, support, separable
casing, or jacket. For such excluded subject matter and
other infrared ray generators see References to Other
Classes, below.
R. METHODS AND APPARATUS FOR MANUFACTURING OR REPAIRING
ELECTRIC LAMPS OR DISCHARGE DEVICES OR SALVAGING PARTS
THEREOF
Class 313 does not provide for the processes or apparatus
used either to manufacture or repair electric lamps or
discharge devices. It should be noted, however, that Class
313 does provide for electric lamp and discharge devices
which are provided with a getter, a gas or vapor generating
means, or pressure regulating means, see above. (See
Subclass References to the Current Class, below.)
S. SYSTEMS, APPARATUS AND METHODS FOR TESTING ELECTRIC LAMPS
AND DISCHARGE DEVICES
See References to Other Classes.
T. RELATIONSHIP OF CLASSES 313 TO 445, ELECTRIC LAMP OR
SPACE DISCHARGE COMPONENT OR DEVICE MANUFACTURING
In view of the statements in the above sections, the
relationship between the classes and subclasses mentioned can
be shown in schedule form thus:
313, Electric Lamp and Discharge Devices
314, Electric Lamp and Discharge Devices: Consumable
Electrodes
315, Electric Lamp and Discharge Devices: Systems
445, Electric Lamp or Space Discharge Component or Device
Manufacturing
U. DISTINCTION BETWEEN DISCHARGE DEVICES AND ELECTRIC
SWITCHES
Some types of electric switches are closely analogous in
structure to some types of discharge devices. This is
especially true with respect to the type of discharge device
where the electrodes of the discharge device are placed in
contact and then separated from each other to establish the
discharge. Some types of switches include means, such as
electromagnets, to extinguish the arc between the switch
contacts when the switch is opened. Some types of discharge
devices include means, such as electromagnets, to defect or
otherwise alter the characteristics of the discharge between
the electrodes.
The distinction between electric switches and discharge
devices, therefore, depends in some cases principally upon
the disclosed purpose of the structure claimed by the patent.
Where the discharge is only an incident to the separating of
the switch contacts and the purpose of the structure is to
open or close a circuit, the device will be considered an
electric switch for the purpose of classification. When the
electrodes are placed in physical contact to close the
circuit, and separated from each other to interrupt the
circuit, the device will be classified as a switch. Where the
purpose of the claimed structure is to establish a space
discharge by contacting the electrodes with each other and
then separating the electrodes, the device is considered to
be a discharge device for Class 313.
Excluded from Class 313 are devices which are designed
normally to have a discharge between the electrodes and which
include means operative after either prolonged use or
overload to establish a short-circuit path from one of the
electrodes to the other electrode so as to extinguish the
space discharge. See above relative to lightning arresters
of this type.
Switches which are somewhat analogous in structure to space
discharge devices where the switch is provided with means to
separate the switch contacts from each other to open the
circuit, the switch structure including means to extinguish
the space discharge formed when the switch contacts are
opened, are classified elsewhere.
See References to Other Classes, below.
W. DISTINCTION BETWEEN DISCHARGE DEVICES AND ELECTRIC
CONDENSERS AND OTHER STATIC FIELD PRODUCING MEANS
Some types of space discharge devices are closely analogous
in structure to some types of electric condensers and other
static field producing devices. In these cases the device
usually consists of two electrodes separated by air, gas,
vapor or vacuum and are designed to have an electric
potential impressed thereon. Where the device is intended to
have a current flow between the electrodes either by
ionization or by electron flow, the device is considered to
be a space discharge device for Class 313. However, if the
device is designed for use without ionization between the
electrodes or without transmitting current by electron flow
then the device will be excluded from Class 313 and found in
the other appropriate class.
Most devices other than the electric condensers of the type
referred to above which are excluded from Class 313 are
devices for treating materials such as ozonizers, electrical
precipitators, disinfecting and sterilizing apparatus.
The Classification of such devices is referred to above. Also
See References to Other Classes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 for discharge devices where significant discharge device
structure is claimed in combination with a jacket, casing or
enclosure having means to modify the temperature of the
discharge device.
11 for lamp and discharge device structure which include
means for modifying the temperature of the lamp or discharge
device. Included are lamp and discharge devices, per se,
having heating means for raising the temperature of the
device, devices with electrodes provided with cooling ducts
or heat radiators, devices with means to modify the
temperature of the envelope, including double walled
envelopes or two sealed enclosing envelopes with a heat
conducting or heat insulating medium (including vacuum) in
the space between the two envelope walls, devices with heat
conducting or insulating members, etc.. Also included in
subclasses 11+ is the structure of electrodes for lamps and
discharge devices which are provided with means to modify the
temperature of the electrode (e.g., electrodes with cooling
fins, fluid ducts, heat transmission means, etc..).
25 for all lamps, per se, and discharge devices, per se,
which are provided with a double walled envelope or two
sealed enclosing envelopes, the second envelope being an
integral part of the lamp or discharge device structure, the
space between the two envelope portions being evacuated or
filled with heat transfer or insulating means to modify the
temperature of the lamp or discharge device.
25 312, 315, 317+, and 634+ for lamps and discharge devices
which have an integral double wall envelope.
49 for a lamp or discharge device combined with a separable
or detachable electric connector (e.g., a socket), and
subclasses 318.01+ a lamp or discharge device provided with
an electrical connector which is a part of the lamp or
discharge device (e.g., a base on the lamp).
110 for lamps and discharge devices with light filters,
reflectors, refractors, etc.. within the envelope of the lamp
or coated upon or forming a part of the envelope of the
lamp.
112 for lamps and discharge devices where the claims are
limited to the envelope being made of a glass or other
material (e.g., quartz) which transmits a particular portion
of the spectrum or a restricted portion of the spectrum.
112 for where the lamp or discharge device has an envelope
made of the material which is especially transparent to
infrared ray energy.
117 for where the lamp or discharge device is provided with
a light obscuring means such as an opaque coating on the
envelope wall.
152 for an electromagnet connected in circuit with an
electrode if the electromagnet is an operator for moving an
electrode.
153 for an electromagnet connected in circuit with an
electrode if the electromagnet generates a magnetic flux
which influences the operation of the lamp or space discharge
device.
174 for electric lamp and discharge devices which are
provided with a getter, a gas or vapor generating means, or
pressure regulating means.
312 for discharge devices having an envelope and a casing or
jacket therefor.
313 for a discharge device provided with an electrical
shield.
317 for lamps and discharge devices with envelopes.
324 for discharge devices and lamps with casings or
jackets.
355 and the subclasses referred to in the notes thereto, for
electrodes which involve significant electrode structure with
a coating or a getter material thereon.
416 for cathode-ray tubes which have a fluorescent or
phosphorescent target.
421 for magnets for cathode-ray tubes which have a plurality
of coils to generate both a deflecting field and a focusing,
concentrating and/or accelerating field. ("Deflection And
Focusing Magnets")
483 for other discharge devices and lamps having an
electrode or the envelope coated with or containing a
fluorescent or phosphorescent material, or which otherwise
include as a part thereof a fluorescent or phosphorescent
material.
549 for all electric lamps and discharge devices which have
combined therewith a getter or a gas or vapor generating
material, irrespective of whether the getter or gas or vapor
generating means, is to be used during the manufacture of the
device, or to be used during the operation of the device, or
to be used as needed after the device has been operated.
Subclasses 549+ also provides for electrode structure
combined with containers or receptacles for the getter or the
gas or vapor generating material.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
29, Metal Working, 825 is the generic place for methods not
elsewhere classified of mechanical manufacturing an
electrical conductor or circuit and subclasses 745+ for
corresponding apparatus. (Lines With Other Classes and
Within This Class, "Methods and Apparatus For Manufacturing
Electrodes")
75, Specialized Metallurgical Processes, Compositions for Use
Therein, Consolidated Metal Powder Compositions, and Loose
Metal Particulate Mixtures, 228 for consolidated metal
powder compositions. (Lines With Other Classes and Within
This Class, "Bushings, Glass-to-Metal Seals and Lead-In
Conductors".)
75, Specialized Metallurgical Processes, Compositions for Use
Therein, Consolidated Metal Powder Compositions, and Loose
Metal Particulate Mixtures, 228 for metal stock, filaments
and wire made of consolidated metal particles. (Lines With
Other Classes and Within This Class, "Coated Electrodes Or
Shields And Compositions,")
116, Signals and Indicators, 216 provides for lamp or
discharge device envelopes or casings which are provided with
an identifying mark which changes its appearance if the lamp
or discharge device is used for an appreciable time. (Lines
With Other Classes and Within This Class, "With Identifying
Indicating Mark")
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
subclass 47 is the generic place for methods not elsewhere
classified of making electrical conductors of indefinite
length. (Lines With Other Classes and Within This Class,
"Methods and Apparatus For Manufacturing Electrodes.")
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
99 for methods of making laminated glass structures. (Lines
With Other Classes and Within This Class, "Defined Only By
Composition")
165, Heat Exchange, takes patents claiming heat exchange
apparatus combined with a device to be cooled or heated
thereby if no structure of said device is included other than
the structure necessary for cooperation with the heat
exchange apparatus, the mere naming of the device as a lamp
or discharge device will not be sufficient to exclude the
patent from Class 165. See especially 47 for a structurally
installed heat exchanger; subclass 74 for a device to be
heated or cooled projecting into and removably secured to a
container for a heat exchange fluid; and subclass 80 for a
removable device removably retained in a heat exchanger.
(Lines With Other Classes and Within This Class, "With
Enclosing Casing Or Jacket:")
165, Heat Exchange, for envelopes and casings provided with
heat exchange means, including a mere metallic envelope
defined as an anode or a similar electrode with heat exchange
means; 177 for a tubular structure with heat transfer means;
and subclass 185 for a heat transmitter, per se. (Lines With
Other Classes and Within This Class, "Lamp, Discharge
Devices, And Envelopes Therefor With Temperature Modifying
Means")
173, Tool Driving Or Impacting, for lead-in conductors of
such rigidity as to form contacts (usually plug-type
contacts), unless significant structure of the device in
addition to the connector structure is recited. Any
specification of electric lamp or discharge device structure
in addition to naming the type of lamp or discharge device
will cause classification of the patent in Class 313.
174, Electricity: Conductors and Insulators, appropriate
subclasses for the combination of an envelope, box or housing
(such as a lamp or discharge device envelope) and either a
separable or integral casing or housing where electrical
features are claimed. (Lines With Other Classes and Within
This Class, G, "Combined With a Separable Casing, Jacket,
Shield, or Envelope Protective Means")
174, Electricity: Conductors and Insulators, for an
electrical device broadly defined within the envelope, the
patent is classified in Class 174. See section 7 of the
class definition of Class 174. Claims which are drawn to a
discharge device or electric lamp or a particular type, such
as a gas filled discharge device, or an incandescent lamp
where only envelope and lead-in structures are claimed are
classified in Class 174. (Lines With Other Classes and
Within This Class, K, "Envelopes, Casings And Jackets For
Lamps And Discharge Devices")
174, Electricity: Conductors and Insulators, is the generic
class for boxes, housings, and envelopes for electrical
devices including electric lamps and discharge devices where
the box, housing or envelope includes means to couple a
conductor to the box, housing, or envelope, or has means for
passing a lead-in conductor into the box or housing. Class
174 also provides for boxes, housings, and envelopes which
are provided with other significant electrical structure or
which are claimed as having an electrical device therein
where no significant characteristics of the electrical device
are recited. (Lines With Other Classes and Within This
Class, K, "Envelopes, Casings And Jackets For Lamps And
Discharge Devices")
174, Electricity: Conductors and Insulators, generic class
for boxes, casings, jackets, and envelope with lead-in
conductors or means to couple conductors to the box, casing,
or jacket; generic class for electrical device combined with
casing, jacket, or shield; for lamp and discharge device
envelopes with electrical connector structure; and for boxes
and housings (e.g., envelopes and casings for lamp and
discharge devices) with electric connector.
174, Electricity: Conductors and Insulators, provides for a
mere housing, casing or envelope for an electrical device,
such as a lamp or discharge device, where no significant
structure of the device is claimed with means for modifying
the temperature of the device and which has electrical
features combined therewith, such as connector structure.
See 15.1 where the housing, casing or envelope is combined
with means for feeding, circulating or distributing a
temperature modifying fluid and see subclasses 50+ where the
temperature modifying means for the housing, casing, or
envelope does not require circulation of a fluid, as for
example, by having heat radiating fins or a heat conductive
path. (Lines With Other Classes and Within This Class, "With
Enclosing Casing Or Jacket:")
174, Electricity: Conductors and Insulators, is the generic
class for the combination of an electrical device recited by
name only (e.g., no significant characteristics of the device
are recited, and the device may be a discharge device or
lamp) and the separable casing, jacket, shield or enclosure
where electrical features are involved such as the lead-in
conductors for the device. See section 7 of the class
definition of Class 174 for the subclasses in Class 174 which
provide for boxes, housings and envelopes in Class 174.
These subclasses also provide for the combination with a
separable casing, jacket, shield or enclosure where
electrical features are claimed. Note especially subclass 35
and 50.51 in Class 174. Class 174 provides for the
combination of a lamp or discharge device and a box, housing,
casing, jacket or other container. ("Combined With A
Separable Casing, Jacket, Shield, Or Envelope Protective
Means")
174, Electricity: Conductors and Insulators, provides for
envelopes designed for use with electrical devices, including
those for electric lamps and space discharge devices, and
which include electrical features (such as lead-in conductors
for the lamp) but which do not include any significant
characteristics of the electrical device, and means to modify
the temperature of the device or envelope. See 15.1 where
the envelope is combined with means for feeding, circulating
or distributing a temperature modifying fluid, and see
subclasses 50.5+ where the temperature modifying means for
the envelope does not require circulation of a fluid as, for
example, by having heat radiating fins or a heat conductive
path. (Lines With Other Classes and Within This Class,
"Lamp, Discharge Devices, And Envelopes Therefor With
Temperature Modifying Means")
174, Electricity: Conductors and Insulators, 17 and 50+ for
envelopes, boxes and housings for electric lamps and
discharge devices which are of general utility and where
electrical features are claimed which are provided with an
electrical connector where significant structure of the box,
housing or envelope is claimed in addition to the electrical
connector structure; subclasses 17.08 and 50.52+ for
hermetically sealed envelopes where significant structure of
the envelope is recited in combination with electrical
connector structure. These subclasses in Class 174 provide
the envelopes having lead-in wires sealed therein which are
designed to form contacts (usually plug type contacts) where
structure of the envelope in addition to the lead-in wire
structure is recited. Note especially subclass 50.53 where
the envelope or seal for the envelope is formed of a
conductive material and is used as the electrical connector
for the device within the envelope. (Lines With Other
Classes and Within This Class, '' Lamps and Discharge Devices
Which Include Electrical Connector Structure")
174, Electricity: Conductors and Insulators, 140 provides
for insulators of the type designed to support electrical
conductors for distribution systems (such as power lines,
telephone lines) which have combined there with arcing horns
or electrodes for preventing concentration of the electrical
stress between the conductor and the support for the
insulator or to prevent arcs between the conductor and its
support from discharging over the surface of or through the
insulator. The structures in Class 174 are analogous to some
of the arc and spark devices in this class in that they
include two arc or spark electrodes which are insulated from
each other by means of an insulator. However, the devices in
Class 174 usually include some structure which is specialized
to their use in supporting and insulating a distribution
conductor with respect to the supporting means. Subclass 144
provides for the arcing devices, per se, especially designed
for use with the insulators of subclasses 140 to 143. (Lines
With Other Classes and Within This Class, "Insulators With
Arcing Devices")
174, Electricity: Conductors and Insulators, 15 for
housings, casings, or envelopes for electrical devices (e.g.,
lamp or discharge devices) with means for modifying the
temperature of the device; subclass 17 for boxes and housings
with electric connector; subclass 17.08 for hermetically
sealed envelope with electric connector; subclass 35 for
miscellaneous electrical shields; subclasses 50+ for
miscellaneous boxes and housings for electrical devices;
subclass 50 for boxes and housings with electric connector;
subclass 50.5 for hermetically sealed envelopes with lead-in
conductors; subclass 50.51 for hermetically sealed envelope
with separable casing or jacket; subclasses 50.52+ for
hermetically sealed envelope with electrical connector;
subclasses 140+, for line insulators with arcing device;
subclass 144, for arcing device, per se, for line insulators;
subclass 151 for insulators for passing conductors through
walls or plates; and subclass 152 for electrical bushings.
174, Electricity: Conductors and Insulators, provides for a
box or housing including a hermetically sealed envelope such
as an envelope for an electric lamp or discharge device where
electrical features are claimed in combination with a
separable electric connector or socket. Class 174 provides
for such a combination where significant features of the box
or housing is recited in addition to the electrical connector
features on the envelope or in the socket or separable
connector. Note that in Class 174, in these subclasses, the
electrical device in the box or housing may be recited by
name only. See especially subclass 17.08 and 50.52+ where
the box or housing is a hermetically sealed envelope such as
is used for electric lamps or discharge devices. (Lines With
Other Classes and Within This Class, "Lamps And Discharge
Devices Combined With A Separable Electric Connector")
174, Electricity: Conductors and Insulators, subclass 151
provides for insulators for insulating a conductor from a
wall through which the conductor extends. Subclass 152
provides for those devices known as bushings, in which a
portion of the insulating element extends into the opening in
the wall. (Lines With Other Classes and Within This Class,
"Bushings, Glass-to-Metal Seals and Lead-In Conductors")
174, Electricity: Conductors and Insulators, is the generic
class for boxes, housings, and envelopes for electrical
devices including electric lamps and discharge devices where
the box, housing or envelope includes means to couple a
conductor to the box, housing, or envelope, or has means for
passing a lead-in conductor into the box or housing. Class
174 also provides for boxes, housings, and envelopes which
are provided with other significant electrical structure or
which are claimed as having an electrical device therein
where no significant characteristics of the electrical device
are recited. See Class 174, Class Definition, Subclass
References to the Current Class for the particular subclasses
which provide for such boxes, housings and envelopes in Class
174, especially subclass 50.5 and the subclasses specified
in the Notes thereto where the box, housing or envelope is
hermetically sealed including such devices as are made of
ceramic, vitreous or nonmetallic plastic material (e.g.,
glass), and is provided with lead-in conductors for passing
electric current into the interior. ( Lines With Other
Classes and Within This Class, "With Lead-In Structure")
188, Brakes, provides, in 378 for caps or jackets to be
placed upon the envelope of a discharge device or a lamp to
damp the vibrations thereof due to the inertia of the cap or
jacket; and in subclass 381 for similar caps or jackets which
damp the vibrations due to friction between the device and
the cap or jacket; in both cases, wherein no significant
features of the lamp or discharge device is claimed. (Lines
With Other Classes and Within This Class, "Combined With A
Separable Casing, Jacket, Shield, Or Envelope Protective
Means")
200, Electricity: Circuit Makers and Breakers, for switches
distinguished from discharge devices.
200, Electricity: Circuit Makers and Breakers, subclass 144
for switches which are somewhat analogous in structure to
space discharge devices, where the switch is provided with
means to separate the switch contacts from each other to open
the circuit, the switch structure including means to
extinguish the space discharge formed when the switch
contacts are opened. (Lines With Other Classes and Within
This Class, U, "Distinction Between Discharge Devices and
Electric Switches")
205, Electrolysis: Processes, Compositions Used Therein, and
Methods of Preparing the Compositions, subclass 50 for a
product (other than one containing two or more contiguous
metallic layers) produced by electrolysis involving
electrolytic marking, battery electrode active material
forming, electroforming, or electrolytic coating. (Lines With
Other Classes and Within This Class, "Coated Electrodes Or
Shields And Compositions,")
219, Electric Heating, for infrared ray generators; subclass
553 for the infrared generator in combination with a
reflector, guard, support, separable casing, or jacket. (See
Lines With Other Classes and Within This Class, Q, "Infrared
Ray Generators")
219, Electric Heating, subclass 45, 407, and 521 for electric
lamps for heating materials. In some of these lamps, the
envelope is made in the form of a receptacle so that the heat
from the lamp filament will heat a material in the
receptacle. Other of the lamps have means provided in the
lamp base for holding the material to be heated. (See Lines
With Other Classes and Within This Class, "Electric Lamp
Provided With Structure For Holding Material To Be Heated")
220, Receptacles, generic class for boxes, casings, jackets,
and containers; 2.1 provides for the combination of envelope
structure with an attached base where no electrical features
are claimed. (Lines With Other Classes and Within This Class,
"With Attached Base")
220, Receptacles, 2.1 are the generic place for the
structure of the envelope, casing, or jacket for lamps and
discharge devices where no significant electrical features
are included. ("Structure")
220, Receptacles, is the miscellaneous class for boxes,
housings, casings, jackets and other containers and provides
for envelopes for lamps and discharge devices and the
separable jackets, boxes, casings, for discharge devices
other than lamps. Class 220 does not provide for the
combination of a lamp or discharge device and a box, housing,
casing, jacket or other container even though the lamp or
discharge device is recited by name only. Such combinations
are found elsewhere. See 2.1, of Class 220 for the separable
jackets, casings and housings for discharge devices in Class
220. Also see subclasses 2.1+ for the gas tight envelope
structure of Class 220. (Lines With Other Classes and Within
This Class, "Combined With A Separable Casing, Jacket,
Shield, Or Envelope Protective Means")
250, Radiant Energy, 200 for photo-electric controlled
systems; subclasses 216+ for photocells with separable
optical means; subclasses 238 for photocells with temperature
modifying means; subclass 239 for photocells with a casing or
housing; subs. 281+ for mass spectrometers for the separation
or analysis of materials; subclass 311 for electron
microscopes; subclasses 336.1+ for systems for utilizing a
space detecting or measuring invisible ray energy; subclasses
324+, 432+, 453.1+, and 492.1 for methods and for apparatus
subjecting objects and materials to electrons, ions, arcs,
and sparks, and for methods and apparatus for treating
objects and materials with ray energy; subclasses 423+ and
453.1+for invisible ray generators combined with a support;
subclasses. 483.1+ for fluorescent and phosphorescent
screens; subclasses 493.1+ for invisible ray generator
combined with a separable casing and having temperature
modifying means, for ultraviolet ray generators combined with
a support, for ultraviolet ray generators with separable
casing or jacket, for ultraviolet ray generator combined with
a separable casing and having temperature modifying means,
and for invisible ray generators with separable casing or
jacket; subclasses 503.1+ for invisible ray generators with
optical device, and for invisible ray generator with
separable ray filter; and subclasses 522.1+ for casing and
jackets limited to use with invisible ray generators.
250, Radiant Energy, subclass 251 for devices for producing
and propagating a unidirectional stream of neutral molecules
or atoms through a vacuum, usually with thermal velocity,
and/or for exciting such molecules and atoms at a resonance
frequency (Lines With Other Classes and Within This Class,
"Molecular Or Atomic Beam Devices")
250, Radiant Energy, 281, for discharge Devices of the type
used in the separation or the analysis of materials utilizing
the mass to electric charge ratio of particles. (Lines With
Other Classes and Within This Class, "Mass Spectrometers")
250, Radiant Energy, subclass 309 and 311.For discharge
devices used to produce electrons or ions and having means
for subjecting objects or materials to the electrons or ions,
including electron microscopes, (Lines With Other Classes and
Within This Class, "Electron Microscopes")
250, Radiant Energy, provides for invisible ray generators
which are enclosed within a separable casing or housing and
which are provided with means for modifying the temperature
of the ray generator where not provided for elsewhere. See
423 for invisible radiant energy generation and sources.
Subclass 238 provides for photocells including those of the
discharge device type which include a separable casing or
housing and means to modify the temperature of the photocell.
(Lines With Other Classes and Within This Class, "With
Enclosing Casing Or Jacket:")
250, Radiant Energy, provides for generators of invisible ray
energy (e.g., ultraviolet ray) which have combined therewith
a separable casing or jacket not provided for elsewhere. See
423 for ion generation and subclasses 493.1+ for invisible
radiant energy generation and sources. Subclass 239 provides
for the combination of a photocell including those of the
discharge type in combination with a separable casing or
housing.(Lines With Other Classes and Within This Class,
"Combined With A Separable Casing, Jacket, Shield, Or
Envelope Protective Means")
250, Radiant Energy, 503.1 provides for invisible ray
generators combined with a separable optical or ray modifying
means where not classified elsewhere. Subclasses 216 to 236
provide for the combination of a photoelectric cell including
those of the discharge device type in combination with
separable optical means used to project light upon the
photocell. (Lines With Other Classes and Within This Class,
"Combined With Optical Device Or Having Special Ray
Transparent Envelope, etc..")
250, Radiant Energy, subclass 336.1 for miscellaneous
electric systems for detecting or measuring invisible ray
energy (e.g., Geiger-Mueller counter systems, etc..); and
subclasses 200+ for miscellaneous electric systems which are
controlled by a photo-electric discharge device. (Lines With
Other Classes and Within This Class, "Gas Pumps And Fans,
Lamp And Discharge Device Systems," for discharge devices and
lamp systems.)
250, Radiant Energy, for the irradiation of material by
nuclear or electromagnetic wave or particle radiation,
especially 324 for methods and apparatus to subject material
to corona irradiation, subclasses 432+ for methods and
apparatus to contained, supported or transferred material
with an irradiating source for the material, subclasses
453.11+ for object supports with or without an irradiating
source for the supported object, subclasses 458.1+ for
methods and apparatus to irradiate fluorescent and
phosphorescent materials and subclass 492.1 for methods and
apparatus to irradiate objects or materials. Also note that
subclasses 281+ provides for methods and apparatus for the
ionic separation or analysis of materials utilizing the mass
to electric charge ratio of particles (e.g., mass
spectrometers). (Lines With Other Classes and Within This
Class, Methods and Apparatus for Subjecting Objects, Articles
and Materials to Ray Energy or Electrons or Ions Generated by
Discharge Devices or Lamps, for such methods and apparatus.)
250, Radiant Energy, provides for generators of invisible ray
energy in combinations with the means for supporting the ray
generating means where not elsewhere provided. See 423 for
methods and apparatus for ion generation and subclasses
493.1+ for methods and apparatus for radiant energy
generation and sources. (From Combined With a Support.)
250, Radiant Energy, 483.1 provides for fluorescent and
phosphorescent screens. (Lines With Other Classes and Within
This Class, "Fluorescent And Phosphorescent Coating And
Compositions")
250, Radiant Energy, 522.1 provides for casings and jackets
for use with generators of invisible ray energy (e.g.,
ultraviolet) where structure is claimed which limits the
jacket to use with such invisible ray energy and subclass 239
provides for photocells where no significant characteristics
of the photocell is recited which include an envelope or
housing for the photocell. (Lines With Other Classes and
Within This Class, "Structure")
252, Compositions, subclass 181.1 and the classes specified
in the notes to the Definition of those subclasses, provides
for compositions which are designed for use as getters or
electric lamp or discharge devices or which are designed for
use in generating a gas or vapor within the envelope or
jacket of an electric lamp or space discharge device. (Lines
With Other Classes and Within This Class, "Getters And Gas Or
Vapor Generating Materials")
252, Compositions, subclasses 301.16-301.6 is the generic
place for fluorescent or phosphorescent materials. (Lines
With Other Classes and Within This Class, "Fluorescent And
Phosphorescent Coating And Compositions")
252, Compositions, 500 for compositions which conduct or
emit electrons and for electrically conductive or emissive
devices defined solely by the composition of which they are
composed. Thus the compositions may be specialized for use
as electron emissive compositions or for preparing
electrodes, filaments and shields for electric lamps or
electric space discharge devices. (Lines With Other Classes
and Within This Class, "Coated Electrodes Or Shields And
Compositions,")
279, Chucks or Sockets, provides for chucks and sockets for
holding rod-like bodies and tools. Some of the chucks and
sockets are designed to hold electrodes such as the carbon
rods used in arc lamps. (Lines With Other Classes and Within
This Class, "Electrodes Combined With Connector Structure")
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 26 for lamps and discharge devices of the
consumable electrode type. (Lines With Other Classes and
Within This Class, F, Combined With Temperature Modifying
Means.)
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, (e.g., arc lamps with means for feeding the
electrodes) Systems; 26 for consumable electrode discharge
device, with temperature modifying means.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, subclass 60 for consumption feed type
electrodes; subclass 60 provides for electrodes which are
limited by claimed structure to use in discharge devices (arc
lamps) in which the feed or motion of one of the electrodes
towards the other is accomplished by the destruction of the
electrode or a portion thereof due to the discharge. (See
Lines With Other Classes and Within This Class, M, Electrodes
and Shields.)
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, for electric systems for supplying electric
current to discharge devices of the consumable electrode
(e.g., arc lamp) type. See above with respect to consumable
electrode discharge devices. (Lines With Other Classes and
Within This Class, "Gas Pumps And Fans, Lamp And Discharge
Device Systems, " for discharge devices and lamp systems.)
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, provides for arc and other electric space
discharge lamps or devices which are provided with at least
one electrode which is consumed during the operation of the
discharge device and such devices in combination with
electric current supply systems therefor. Substantially all
of the lamps in Class 314 are characterized by being provided
with feeding means to move the electrodes together as the
electrode is consumed.
Patents claiming an "arc discharge device" or an "arc lamp"
are not classified in Class 314 unless the claims are limited
by claimed subject matter to discharge devices of the
consumable electrode type. Class 313 provides for arc lamp
and discharge device structure which is of general utility
and not necessarily limited to use with devices of the
consumable electrode type. The electrodes for the consumable
electrode type discharge devices are classified with other
electrodes in Class 313 except for the consumption feed type
electrodes in Class 314 subclass 60. See above for the
classification of electrodes in Class 313. (See Lines With
Other Classes and Within This Class, "Consumable Electrode
Discharge Devices" above)
315, Electric Lamp and Discharge Devices: Systems,
subclasses. 1-11, 12.1, 13.1-17, and 364-410, for systems of
supply for cathode-ray tubes; 3 for cathode-ray tubes
structure combined with a circuit element; subclasses 32+ for
electric lamps and discharge devices structurally combined
with a circuit element; subclasses 32+ for lightning arrestor
structurally combined with a discharge device; subclasses 46+
for discharge devices having a lamp filament or heating
resistance in shunt with the electrodes; subclass 49 for
discharge devices having a lamp filament or heating
resistance in series with the discharge electrodes;
subclasses 76-363 for systems of supply for electric lamps
and gas or vapor type discharge devices; and subclasses 364+
for resting electric lamps or discharge devices.
315, Electric Lamp and Discharge Devices: Systems, 3 and
32+ provide for discharge devices and lamps which have a
circuit element (e.g., switch, impedance, etc..,)
structurally combined with the lamp or discharge device, see
subclasses 3+ where the discharge device is a cathode-ray
tube. The circuit element may be within the base of the lamp
or discharge device or within the enclosing envelope of the
lamp or discharge device. (See Lines With Other Classes and
Within This Class, "Lamps And Discharge Devices Having A
Circuit Element" above)
315, Electric Lamp and Discharge Devices: Systems, 46 and 49
provide for the combination of a discharge device and a
filamentary lamp which are structurally combined in a single
unitary structure and where the lamp filament is in circuit
relation with the electrodes of the discharge device. See
subclasses 46+ where the lamp filament is connected in shunt
with the discharge electrodes and subclasses 409 and 410
where the lamp filament is connected in series with the
discharge electrodes. (Lines With Other Classes and Within
This Class, "Discharge Devices Structurally Combined With/In
Circuit Relation With Incandescent Lamps")
315, Electric Lamp and Discharge Devices: Systems, 46 and
49 provide for discharge devices which include an electric
heater (e.g., the cathode heater filament for an indirectly
heated cathode, or other heater) which is connected in
circuit relationship with the discharge electrodes. See
subclasses 46+ where the heater is connected in shunt to the
discharge electrodes and subclass 49 where the heater is in
series with the discharge electrodes. Not included in Class
313 in accordance with the line stated in this section are
discharge devices having a directly heated or filamentary
cathode which is necessarily in series with the discharge
electrodes. (Lines With Other Classes and Within This Class,
"Discharge Devices With Cathode Heater Or Other Structurally
Combined Heater In Circuit Relation")
315, Electric Lamp and Discharge Devices: Systems, 32 for
lightning arrestors having a space discharge device and
circuit impedance element structurally combined to make an
integral unit. (Lines With Other Classes and Within This
Class, "Insulators With Arcing Devices," the excluded types
of lightning arresters.)
315, Electric Lamp and Discharge Devices: Systems,
subclasses 1-11, 12.1, 13.1-17, and 364-410 for miscellaneous
systems for supplying electric current and/or potential to a
cathode-ray tube, subclasses 3+ and 32+ for electric lamp and
discharge devices which have a circuit element structurally
combined with the lamp or discharge device, subclasses 76 to
363 for miscellaneous systems for supplying electric current
and/or potential to electric lamps, and to discharge devices
of the gas or vapor type, and subclass 411 for power supplies
utilizing the magnetic energy of an output transformer of a
cathode ray deflection circuit. (Lines With Other Classes
and Within This Class, "Gas Pumps And Fans, Lamp And
Discharge Device Systems,'' for discharge devices and lamp
systems.)
315, Electric Lamp and Discharge Devices: Systems, 364 is
the generic place for testing electric lamps or discharge
devices.
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, appropriate subclasses for
miscellaneous systems employing space discharge active
element devices. (Lines With Other Classes and Within This
Class, "Gas Pumps And Fans, Lamp And Discharge Device
Systems, " for discharge devices and lamp systems.)
331, Oscillators, subclass 5 for magnetron oscillator with
automatic frequency stabilization; subclasses 6+ for Klystron
oscillator with automatic frequency stabilization ; subclass
78 for electric noise generators using gas tubes; subclasses
79+ for beam tube oscillators; subclass 98 for oscillators
using disk seal tube; subclasses 126+ for oscillator using
gaseous space discharge device; and subclass 184 for
oscillator using unique space discharge device.
331, Oscillators, appropriate subclasses for electrical
oscillators utilizing space discharge devices of particular
construction, especially 6 and 79+ for beam tube
oscillators, subclasses 5 and 86+ for magnetron type
oscillators, subclasses 78 and 126+ for gaseous space
discharge type oscillators, subclass 98 for oscillators
utilizing disk seal tubes enclosed by distributed parameter
resonators, and subclass 184 for oscillators utilizing a
space discharge device of particular construction. (Lines
With Other Classes and Within This Class, "Gas Pumps And
Fans, Lamp And Discharge Device Systems," for discharge
devices and lamp systems.)
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 210 provides for electromagnets designed
for use with electric lamps and discharge devices. Such
magnets include those used with the cathode-ray tubes
classified in subclasses 75+ of Class 313 to deflect the
cathode ray beam, those used with the cathode ray tubes
classified in subclasses 441+ to focus, concentrate or
accelerate the cathode ray, and those used with the other
discharge devices and lamps in subclasses 153+. (Lines With
Other Classes and Within This Class, "Deflection And Focusing
Magnet'')
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 210 for electromagnets for focusing and
deflecting.
337, Electricity: Electrothermally or Thermally Actuated
Switches, 28 for combined thermal switches and lightning
arrestors. (Lines With Other Classes and Within This Class,
"Insulators With Arcing Devices," the excluded types of
lightning arresters.)
338, Electrical Resistors, appropriate subclasses, for
electrical resistors, per se. Some of the resistance
elements in Class 338 are somewhat analogous to the filaments
used in electric lamps and space discharge devices. Note
that 500 in Class 252 provides for electrically conductive
or emissive compositions which include resistance defined
solely by their composition.
347, Incremental Printing of Symbolic Information, 121 and
226+ for cathode ray discharge devices provided with means
for making a record of the trace of the cathode beam (usually
means for impressing the beam upon a photos:graphic film or
means for impressing the trace made upon a fluorescent screen
upon a photos:graphic film) irrespective of whether the
recording means is within or without the envelope of the
cathode-ray device. (Lines With Other Classes and Within This
Class, "Cathode Ray Oscillographs")
348, Television, 818 for cathode-ray tubes of the signal
receiving type and provided with a shield or envelope
protective means. (Lines With Other Classes and Within This
Class, "Combined With A Separable Casing, Jacket, Shield, Or
Envelope Protective Means")
348, Television, 373 and 825+ for cathode-ray tubes utilized
in television systems and provided with a supporting means.
(Lines With Other Classes and Within This Class, "Combined
With a Support")
348, Television, 335 and 832+ for cathode-ray tubes utilized
in television systems and combined with an optical device.
(Lines With Other Classes and Within This Class, "Combined
With Optical Device Or Having Special Ray Transparent
Envelope etc..")
361, Electricity: Electrical Systems and Devices, 117 for
lightning arrester; and subclasses 271+ for condensers
distinguished from discharge devices.
361, Electricity: Electrical Systems and Devices, 271 for
electric condensers, per se. (Lines With Other Classes and
Within This Class, "Distinction Between Discharge Devices And
Electric Condensers, etc...")
361, Electricity: Electrical Systems and Devices, 117 for
the lightning arresters generally. (Lines With Other Classes
and Within This Class, "Insulators With Arcing Devices," the
excluded types of lightning arresters.)
362, Illumination, where the second envelope wall is not
integral with the lamp envelope, that is, it is removable
therefrom; subclass 363 for means for surrounding a light
source wherein said means is made of light pervious material.
See Class 362 or one of the classes specified in the notes
to that class. (Lines With Other Classes and Within This
Class, G, "Combined With a Separable Casing, Jacket, Shield,
or Envelope Protective Means")
362, Illumination, or one of the classes specified in the
notes thereto, provides for all lamps including those of the
discharge device type, which have a separable casing, jacket
or enclosure about the lamp and which include means to modify
the temperature of the lamp; see especially subclass 294 and
373. (Lines With Other Classes and Within This Class,
Temperature Modifying Means--With Enclosing Casing Or
Jacket)
362, Illumination, or one of the classes specified in the
notes to that class for lamps including discharge device
lamps combined with a supporting means for the lamp (Lines
With Other Classes and Within This Class, "Combined With A
Support")
362, Illumination, or one of the classes specified in the
notes thereto provides for all combinations of lamps
including those of the discharge device type in combination
with separable casing, jacket, shield or enclosure. (Lines
With Other Classes and Within This Class, "Combined With A
Separable Casing, Jacket, Shield, Or Envelope Protective
Means")
362, Illumination, for lamps combined with a support; for
lamps combined with a separable casing or jacket and having
temperature modifying means; for lamps combined with a
separable casing, jacket, shield or enclosure; for lamps with
separable optical devices, light shade, light obscuring
means, lamp protector or other illuminating devices; and
subclass 84 for illuminating devices with a fluorescent or
phosphorescent material. (Lines With Other Classes and Within
This Class, "Fluorescent And Phosphorescent Coating And
Compositions")
362, Illumination, or one of the classes specified in the
notes thereto, provides for all lamps including those of the
discharge device which have a separable optical device, light
shade, light obscuring means, lamp protector or other
illuminating device combined therewith. In the art in Class
362, and the related classes specified in the notes thereto
will be found devices such as lanterns, projectors, signal
lights, etc.., where the lamp may be readily replaced or
changed without modifying or altering the structure of the
electric lamp. The devices in Class 362 and the classes
referred to in the notes thereto ordinarily include an
electrical socket or other connector into which the lamp base
is placed. (Lines With Other Classes and Within This Class,
"Combined With Optical Device Or Having Special Ray
Transparent Envelope, etc..")
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, appropriate subclasses, particular 156 for
processes of treating materials with ray energy within a
nuclear reactor, or for processes and apparatus for carrying
out nuclear changes by the use of ray or similar energy. See
subclasses 100+ for fusion reactions and reactors and
subclasses 347+ for fission reactions and reactors. (Lines
With Other Classes and Within This Class, "Methods and
Apparatus for Subjecting Objects, Articles and Materials to
Ray Energy or Electrons or Ions Generated by Discharge
Devices or Lamps," for such methods and apparatus.)
378, X-Ray or Gamma Ray Systems or Devices, 193 for source
supports, per se. ("Combined With A Separable Casing, Jacket,
Shield, Or Envelope Protective Means")
378, X-Ray or Gamma Ray Systems or Devices, 91 for
electronic circuits; subclasses 119+ for sources; and
subclasses 193+ for source supports.( "X-ray Tubes And
Targets")
378, X-Ray or Gamma Ray Systems or Devices, 91 provides for
systems for supplying electric current and/or potential to
X-ray tubes. (Lines With Other Classes and Within This
Class, "Gas Pumps And Fans, Lamp And Discharge Device
Systems," for discharge devices and lamp systems.)
378, X-Ray or Gamma Ray Systems or Devices, appropriate
subclasses for subjecting objects to X-rays or gamma rays.
(Lines With Other Classes and Within This Class, "Methods and
Apparatus for Subjecting Objects, Articles And Materials to
Ray Energy or Electrons or Ions Generated by Discharge
Devices or Lamps, " for such methods and apparatus.)
378, X-Ray or Gamma Ray Systems or Devices, 119 for sources,
combined with supports. (Lines With Other Classes and Within
This Class, "Combined With a Support")
392, Electric Resistance Heating Devices, 407 provides for
electrical heaters which include an electric lamp and a
reflector, casing or other housing. See above for electric
lamps provided with structure for holding a material to be
heated. (Lines With Other Classes and Within This Class,
"Combined With A Separable Casing, Jacket, Shield, Or
Envelope Protective Means")
403, Joints and Connections, appropriate subclasses for a
joint between a metal member and a glass or ceramic member.
(Lines With Other Classes and Within This Class, "Bushings,
Glass-to-Metal Seals and Lead-In Conductors")
403, Joints and Connections, appropriate subclasses for the
joint between an envelope and its attached base where no
structure of the envelope other than that providing for the
joint is included. See References to Other Classes for other
classes which provide for joints. (Lines With Other Classes
and Within This Class, "With Attached Base")
403, Joints and Connections, is a class of joints of general
application. See the search notes thereto for other classes
which provide for joints or connections.(Lines With Other
Classes and Within This Class, "Electrodes Combined With
Connector Structure")
417, Pumps, 48 provides for pumps utilizing a space
discharge. See subclass 49 of Class 417 for a statement of
the line. (Lines With Other Classes and Within This Class,
"Gas Pumps And Fans")
417, Pumps, 48 for electrical or getter-type means. ( Lines
With Other Classes and Within This Class, "Getters And Gas Or
Vapor Generating Materials")
420, Alloys or Metallic Compositions, appropriate subclasses
for metal strands, filaments or wire made of alloys or single
metals. (Lines With Other Classes and Within This Class,
"Coated Electrodes Or Shields And Compositions, ")
423, Chemistry of Inorganic Compounds, 445 provides for
carbon, per se, and carbon articles defined solely in terms
of the material from which they are made. (Lines With Other
Classes and Within This Class, "Coated Electrodes Or Shields
And Compositions,")
427, Coating Processes, 58 for processes of coating, per se,
wherein the product is an electrical product. (Lines With
Other Classes and Within This Class, "Methods And Apparatus
For Manufacturing Electrodes")
427, Coating Processes, 64 for coating processes, per se,
wherein the product is an electrical product with a
fluorescent or phosphorescent base or coating. (Lines With
Other Classes and Within This Class, "Fluorescent And
Phosphorescent Coating And Compositions")
427, Coating Processes, 58 for processes of coating, per se,
wherein the product is an electrical product. (Lines With
Other Classes and Within This Class, "Coated Electrodes Or
Shields And Compositions,")
428, Stock Material or Miscellaneous Articles, 34.1 for
hollow articles (e.g., lamp bulbs) with a coating thereon;
subclasses 426+ for laminated glass structure; subclasses 913
and 917 for phosphorescent, fluorescent, and
electroluminescent; and subclasses 375+ for coated conductors
or conductors or emitters or electrodes with emissive
coatings thereon.
428, Stock Material or Miscellaneous Articles, 544 is the
generic place for all metal or adjacent metals containing
materials not elsewhere classified. (Lines With Other
Classes and Within This Class, "Bushings, Glass-to-Metal
Seals and Lead-In Conductors")
428, Stock Material or Miscellaneous Articles, 375 and 544+
provide for a rod, strand, fiber or filament with a coating
thereon, which coated products may be electron emissive or
miscellaneous conductors such as metal rods, wires or
filaments with various coating thereon, including insulating
coatings and also for electrodes which are merely composite
laminates defined in terms of the composition of the
components. (Lines With Other Classes and Within This Class,
"Coated Electrodes Or Shields And Compositions")
428, Stock Material or Miscellaneous Articles, 34.1 for a
hollow or container type article (e.g., lamp bulb) defined
only as a base with a coating thereon, subclasses 426+ for a
nonstructural composite web or sheet including a layer of
glass, and subclasses 913 and 917 (cross-reference art
collections) for a product which is responsive to light
(e.g., fluorescent or phosphorescent) and a product which is
electro-luminescent. (Lines With Other Classes and Within
This Class, "Defined Only By Composition")
431, Combustion, 358 for flash lamps in which a solid fuel
is burned and which have electric igniting means for
initiating combustion of the fuel, e.g., "photoflash bulbs".
The distinction between a photoflash bulb found in Class 431,
Combustion, subclasses 358+ and an electric lamp is that in
the photoflash bulb there is a solid fuel usually aluminum or
magnesium foil and an electric filament for igniting the foil
so that the foil burns and the light is due to the combustion
of the foil. In other types of photoflash bulbs the filament
is made of a material which burns and the light is due to the
combustion of the filament. In an incandescent electric lamp
the light is due only to the heat generated by the current
passing through the filament and the filament is not intended
to be burned. The lamp ordinarily is provided with a
noncombustible gas or a vacuum to prevent combustion of the
filament while the devices in Class 431 are provided with an
atmosphere of combustible gas.
439, Electrical Connectors, appropriate subclass providing
for the electrical connector structure. For example, where
an electrode is composed of two rod-like portions and one
portion is provided with a hollow screw threaded socket and
the other is provided with the screw threaded end to fit into
the socket, the patent is classified elsewhere. However, if
the structure includes means such as a portion of higher
electrical conductivity to insure good electrical contact
between the portions, the patent would be classified in Class
439. (Lines With Other Classes and Wtihin This Class, M,
Electrodes And Shields)
439, Electrical Connectors, for device with separable
electrical connector, for device with electrical connector
and for electrode with connector structure; and for electrode
and shield with joint between parts; 607 for connector with
anti-inductive shield; and subclasses 611+ for connector
having vitreous envelope secured thereto.
439, Electrical Connectors, provides for an electrical
connector, per se. Also included in that class is a
combination not provided for elsewhere, or of such nature as
to be best grouped with the electrical connector. For
example, a "named" lamp combined with a specific connector is
included in Class 439. The reference to a "filament" or to
the support structure is considered to make a claimed lamp
"significant" whereas a reference to the "envelope" is not
considered to be more than naming of the lamp. Further
examples, included in Class 439 is the combination of an
electrical lamp base with an "incandescent" lamp, a
"fluorescent" lamp, or a "gas filled" lamp, provided that
there is no claimed reference to other illuminating portions
of the lamp. Reference to the particular shape of the
envelope will not exclude placement of a patent from Class
439 if no structure is recited which limits the envelope to
use with a lamp or discharge device. (Lines With Other
Classes and Within This Class, "Lamps And Discharge Devices
Combined With A Separable Electric Connector")
439, Electrical Connectors, provides for a device having
significant electrical connector structure combined with
named other structure or with such other structure as is not
provided for elsewhere. See the discussion above. See
especially 611 for the combination of an electrical
connector with a vitreous envelope secured thereto. (Lines
With Other Classes and Within This Class, "Lamps And
Discharge Devices Which Include Electrical Connector
Structure")
439, Electrical Connectors, provides for a device having
electrical connector structure where no significant structure
for the device is recited other than that necessary to
provide for or to cooperate with electrical connector
structure. Class 439 includes an electrode for an electric
lamp or space discharge device where the only structure of
the electrode recited is that necessary to provide for or to
cooperate with electrical connector structure; see 607 for
the combination of an electrical connector and means to
shield the connector portions from radiating electromagnetic
waves for which see. (Lines With Other Classes and Within
This Class, "Electrodes Combined With Connector Structure")
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, is the generic place for a process or an
apparatus for manufacturing an electric lamp, a discharge
device, an electrode or another part thereof. The search
notes for Class 445 should be consulted as to the other
classes and subclasses which provide for processes or
apparatus used in manufacture an electric lamp, discharge
device or a part thereof; see subclass 2 for a process which
is limited to use in repairing or reconditioning a lamp or
discharge device, or to use in salvaging one or more parts of
a lamp or discharge device; subclass 61 provides for the
corresponding apparatus. (Lines With Other Classes and Within
This Class, "Methods, Apparatus For Manufacturing/Repairing
Electric Lamps Or Discharge Devices Or Salvaging Parts,")
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, 35 for methods of manufacturing electrodes;
and subclasses 46+ for methods of manufacturing electrodes.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, is the generic place for methods and apparatus
for manufacturing electrodes for electric lamps and discharge
devices. See 35 and 46+ for the processes of making
electrodes. See the search notes to these subclasses for the
classes which provide for either process or apparatus for
manufacturing electrodes. (Lines With Other Classes and
Within This Class, "Methods and Apparatus For Manufacturing
Electrodes.)
501, Compositions: Ceramic, 11 for lamp and space discharge
device envelopes defined only as being made of glass
compositions and for glass compositions, per se. (Lines With
Other Classes and Within This Class, "Defined Only By
Composition")
GLOSSARY:
ANODES
An electrode which acts as the positive terminal of the
discharge or which acts as the positive terminal of an
electric field to cause a discharge or accelerate the
electrons in a discharge. See the definition of cathode
above, and the definition of control electrode below.
ANTI-CATHODE
Same as "target" or anode. Used in reference to X-ray tube
anodes.
AUXILIARY STARTING ELECTRODE
An electrode designed for use in a discharge device having at
least two principal discharge electrodes and the auxiliary
starting electrode. The starting electrode is designed to be
connected in the circuit so that the discharge is initiated
between it and one of the principal electrodes, the auxiliary
discharge conditioning the discharge space so that a
discharge between the principal electrodes can be
established. An auxiliary starting electrode does not
necessarily differ in structure or material from any other
electrode. Auxiliary starting electrodes are usually simple
electrodes, a wire or rod, and are usually not formed from as
heavy or strong material as the principal electrodes.
Usually an auxiliary starting electrode is placed close to a
principal electrode so that the discharge may be initiated
between the auxiliary starting electrode and the main
electrode at a smaller voltage than is necessary to initiate
the discharge between the principal electrodes. The
auxiliary starting electrode may be supplied with current
only during the starting period or it may be supplied with
current during the operation of the device so that a
continuous discharge takes place between it an done of the
principal electrodes to assure ionization in the discharge
space so that the discharge between the principal electrodes
may take place at the proper time. The latter type of
auxiliary starting electrodes are also known as "holding
electrodes". Where a plurality of auxiliary starting
electrodes are used, they may be spaced at intervals between
the principal electrodes so that the discharge may first be
established between one principal electrode and the nearer
auxiliary starting electrode, then to a more remote auxiliary
starting electrode and so on until the discharge is
established between the principal electrodes. If a plurality
of auxiliary starting electrodes are used, one may be placed
close to each of a plurality of principal electrodes. In as
much as the determination of whether or not an electrode is
an auxiliary starting electrode depends upon the circuit
connections to the discharge device, and this class includes
only the structure of the discharge device, per se, only in
subclasses 170+ (liquid electrode discharge devices) and
subclasses 596+ and 601+ (gas or vapor-type discharge
devices) is the classification based upon one of the
electrodes being an auxiliary starting electrode.
BASE
A member attached to the lamp or discharge device so that it
may be attached to a supporting socket or supported on a
surface. The base usually includes electrical connector
means for connecting the lamp or discharge device in a
circuit. Where the lamp or discharge device is provided with
an envelope, the base is usually attached to the envelope, as
by cementing, or the envelope is formed so as to have an
integral base portion.
CASING
A container or enclosure for a lamp or discharge device, or a
part thereof. See Envelope above.
CATHODE
An electrode which acts as the negative device. In some
discharge devices, such as spark gaps, there is no difference
in structure between the cathode and anode. Consequently,
the use of the words "cathode" and "anode" have been avoided
except where there is some significance in structure between
the two electrodes.
CATHODE RAY DEVICE
A discharge device having means for forming the electric
discharge into a restricted beam or ray, usually
pencil-like.
CATHANODE
An electrode designed to serve as an anode with respect to a
cathode and to be heated by the discharge so that another
surface of the electrode emits electrons to a second anode.
See subclass 305 for discharge devices having a cathanode.
CONTROL ELECTRODE
An electrode designed to influence or control the discharge
current flowing between other electrodes. It may depend for
its effect on either its electro-static effect or on the
current flow thereto. The most common type of control
electrode is the control grid. Since, however, the grid may
be used as an anode, and the anode as a grid in many types of
discharge devices, the use of the expression "control
electrode" has been avoided where possible and similar
structures placed together irrespective of whether the
disclosure indicated that the grid electrode is to be used as
an anode or control electrode. Patents relating to discharge
devices having one or more grid electrodes interposed between
a cathode and an anode are classified in subclasses 293+ or
in the subclasses referred to in the notes to these
subclasses. See subclass 308 and the subclasses referred to
in the notes thereto for other discharge devices having a
control electrode.
DIRECTLY HEATED CATHODE:
A filament designed to have its terminals connected to a
source of current, the filament being heated by the current
passing through it.
ELECTRIC LAMP
A device for converting electrical energy into visible light
or ultraviolet light. Most lamps also generate infrared
rays, but infrared ray generators are included only when they
have structure analogous to electric lamps or electric space
discharge devices. See the notes below. Electric lamps may
be in the form of electric space discharge devices, for which
see the next paragraph.
ELECTRIC SPACE DISCHARGE DEVICES
(the shorter expression "DISCHARGE DEVICES" is used in these
definitions) Any device which is intended to have an
electrical current flow between two spaced electrodes, at
least part of the path followed by the discharge being
constituted by a gas, vapor, or vacuum.
ELECTRODE
A filament or glower of an electric lamp or a member arranged
to emit, and/or collect, and/or control the movement of
electrons or ions in a discharge device.
EMISSIVE CATHODE
A low work function electrode.
ENVELOPE
A gas tight enclosure for an electric lamp or discharge
device. It may be evacuated or filled with a gas or vapor.
In general the distinction between an envelope and a mere
jacket, casing or housing is that the envelope is sealed, so
as to be gas tight.
FILAMENT
A wire, ribbon or rod conducting member. It may be made of
metal or nonmetal. In this class filaments, per se, are
classified in subclasses 341+ irrespective of whether the
filament is to be used in a lamp or discharge device, and
irrespective of whether the filament is to be heated by
passing a current through the filament (directly heated
cathode) or is to be heated by the discharge in a discharge
device (see thermionic cathode).
FLUORESCENT OR PHOSPHORESCENT MATERIAL
A material which absorbs radiant energy of one wave length
(e.g., light) and is excited thereby to cause it to emit
radiant energy of another wave length (e.g., light of another
wave length), or a material which is excitable by the impact
of electrons, ions, or analogous energy (e.g., gamma rays)
thereon to emit light energy without becoming incandescent.
GAS OR VAPOR GENERATING MATERIAL
Solid or liquid material which is placed within the envelope
and generates a gas or vapor by virtue of a chemical change,
by volatilization, or by giving off an absorbed gas or vapor.
It may do this during normal operation or it may be caused
to do so by treatment preliminary to placing the device in
operation.
GETTERS
Materials which, when used in closed containers, reduce the
gas or vapor content of the container. A getter may react
with the gas or vapor in the container to form a solid
nonvaporizable material, or to adsorb or absorb the gas or
vapor, or may reduce the amount of the gas or vapor in the
container in any other way. The material may be a getter for
one gas or vapor and may not have any effect upon another gas
or vapor.
GLOWER
Any body made of a material which when heated by the passage
of an electric current therethrough emits light rays. The
term glower includes filaments and also includes other bodies
which are not of filamentary dimensions such as, rods and
bars made of second class conductors.
GRID ELECTRODE
An electrode having one or more apertures therein, usually
formed of open-work material, such as wire mesh, perforated
sheet material, or of wires or bars as of coiled wire, or
other foraminous structure, and sometimes used as the control
electrode in a discharge device. As pointed out in the
definition of "control electrode" above, the terms "grid
electrode" and "control electrode" are not synonymous in this
class.
HEATED CATHODE
Either a directly heated cathode or an indirectly heated
cathode.
HOLDING ELECTRODES
See the definition of auxiliary starting electrode above.
INCANDESCENT LAMP
Lamps which are provided with a filament or glower adapted to
be heated to incandescence by the passage of an electric
current therethrough.
INDIRECTLY-HEATED CATHODE (Equipotential cathode)
A cathode designed to be heated to its emitting temperature
by a separate heating element.
IONIC CATHODE
A virtual cathode formed by a discharge in a gas or vapor
between two electrodes, the discharge serving to supply
electrons to a third electrode. See subclass 588 for
discharge devices having an ionic cathode.
JACKET
Same as casing above.
LEAD-IN
The conductor used to transmit electric current or potential
from the exterior of the envelope or casing into the interior
of the envelope or casing. Where the envelope is made of
glass it usually consists of a conductor which passes through
the wall of the envelope and which is sealed to the glass by
a glass-to-metal seal.
LOW WORK FUNCTION ELECTRODE (cold cathode, cathodes
containing or coated with electron emissive material)
A cathode containing or coated with a material which readily
emits electrons, i.e., a material which has a low work
function. Examples of such materials are the alkali metals
and their oxides, alkaline earth metals and their oxides,
thorium, magnesium. The expression "low work function
electrode" includes thermionic electrodes which contain or
are coated with electron emissive material, photosensitive
cathodes, secondary emissive cathodes as well as cathodes
which emit electrons without being heated.
PHOTO-CELLS
A device to be used in an electrical circuit which is
provided with means responsive to light or analogous rays for
altering the operation of the device. The only photocells
included in this class are photosensitive discharge devices
and photosensitive electric lamps.
PHOTO-SENSITIVE
A device provided with means sensitive to light or analogous
rays for altering the operation of the device.
PHOTO-SENSITIVE CATHODE
An electrode which emits electrons when subjected to the
action of light or analogous rays. Discharge devices having a
photosensitive cathode or other photosensitive electrode are
classified in subclasses 523+ in this class. See
photosensitive electrode above. See the class definition for
the classification of photosensitive cathodes, per se.
PHOTO-SENSITIVE ELECTRODE
An electrode which has its electrical properties changed by
the action of light or analogous ray energy. The ray energy
may be X-rays, ultraviolet rays, infrared rays, or any
analogous radiation. See the class definition for the
classification of photosensitive electrodes, per se.
PYRO-ELECTRIC LAMP
An electric lamp which has as the light emitting body a
material which is a second class conductor. The lamps are
designed to have the pyro-electric body heated by a separate
source until the pyro-electric material becomes conductive
and then the current flow through the pyro-electric body
maintains the second class conductor material at a
temperature at which it emits light.
SECOND CLASS CONDUCTORS
A material having a very high electrical resistance at
ordinary temperatures and a low resistance when heated.
Glowers formed of oxides, such as Th[supscrpt]2[end supscrpt]
or the rare earth oxides, used in the pyro-electric (e.g.,
Nernst) type of incandescent lamp are examples of second
class conductors.
SECONDARY EMISSIVE CATHODE
A cathode designed to emit electrons by virtue of the impact
by electrons upon the electron emissive surface. See the
class definition for the classification of secondary emissive
cathodes, per se. See cathanode below.
SHIELDS
Structures used in lamps and discharge devices to modify the
electrical characteristics thereof, or structures which are
used to protect the lamp or discharge device from external
influences, or structures which are used to protect parts of
the device from influences, such as electron bombardment,
originating in another part of the device, and other
structures used for protective purposes. Shields do not
include mere electrodes even though the electrode is defined
as being a shielding electrode. Where an electrode of a
discharge device is provided with shielding structure in
addition to the structure provided for influencing the
electric space discharge, such additional structure is
considered to be shielding structure. Examples of such
additional shielding are where an indirectly heated cathode
is provided with a flange for shielding the discharge space
from the influence of the cathode heater current, or where an
anode, grid, or lead wire is provided with shielding means to
shield the lead-in wires from the effects of electrostatic
fields. Metal or conductive envelopes for discharge devices
are not considered to be shields where the envelope is
designed to function as an electrode of the discharge device,
such as an anode. Where the metal or conductive envelope is
disclosed as being provided for shielding purposes and not an
electrode, the envelope is considered to be a shield.
SPARK PLUG
A unitary spark gap having a plurality of insulated
electrodes arranged out of contact with each other so that
the space discharge is a "jump spark" and usually having a
shell or sleeve designed to be attached to an opening in an
internal combustion engine or other device, the shell or
sleeve carrying one or more electrodes within it which are
insulated from the shell or sleeve by an insulating bushing
or other insulation. The shell or sleeve often carries an
electrode which cooperates with the other insulated electrode
to form the jump-spark gap. Included are the devices known
as spark plugs usually used on the ordinary automotive
internal combustion engine. Also included are spark plugs
for other uses which are similar in structure. It does not
include ignitors where the spark is made by moving the
electrodes into contact and then separating them to draw the
spark. It does not include ignitors which are not similar in
structure to the automobile spark plug even if they are of
the jump spark type. Spark plugs having only a single
electrode which are designed to be used with some other
device, as the cylinder head, so as to form a jump spark
therewith are also excluded.
TARGET
In an X-ray tube, cathode-ray tube, or other beam type
discharge device, the anode or the member against which the
principal electron or ion stream impinges. See the
definition of anode above.
THERMIONIC CATHODE
A cathode designed to operate at an elevated temperature. The
expression, "thermionic cathode" includes directly heated
cathodes, indirectly heated cathodes, and also cathodes which
are designed to be heated by ionic bombardment to the
electron emitting temperature.
THREE OR MORE ELECTRODE DISCHARGE DEVICES
Any discharge device having three or more electrodes whether
all of the electrodes have lead-wires for connection to the
supply circuit or not. In some of the three or more
electrode discharge devices, the electrodes are arranged with
one or more electrodes disposed in the interelectrode space
or in the discharge path between two other electrodes, and
have only the outer electrodes provided with lead-wires for
connecting to the supply circuit, the discharge passing from
the outer electrodes to the interposed electrode so that the
discharge device has a plurality of series connected
discharge spaces.
X-RAY TUBE
A discharge device designed to generate X-rays.
SUBCLASSES
Subclass:
1
This subclass is indented under the class definition.
Subject matter wherein the plurality of electric lamps or
discharge devices or an electric lamp and a discharge device
are structurally combined in a single device to form a single
unitary device.
(1) Note. This or the indented subclasses do not include
the following subject matter even though such subject matter
is within the subclass definition: (a) An incandescent lamp
having a plurality of filaments or glowers all within the
same envelope is not included in this or the indented
subclasses but will be found in subclass 316 below, or in one
of the subclasses specified in the search notes of that
subclass; (b) Structural combinations of an incandescent
lamp and a discharge device where the filament of the lamp is
connected in shunt with the discharge electrodes of the
discharge device. See Class 315, Electric Lamp and Discharge
Devices: Systems, subclasses 46+ for this subject matter;
(c) Structural combinations of an incandescent lamp and a
discharge device where the lamp filament is connected in
series with the discharge electrodes of the discharge device.
See Class 315, Electric Lamp and Discharge Devices:
Systems, subclass 49 for this subject matter; (d)
Structural combinations consisting of a firing gap of a spark
plug, and an intensifier gap connected in series therewith,
see subclasses 123+ for this subject matter.
(2) Note. In many of the devices in this and the indented
subclasses the plurality of devices are enclosed within the
same envelope.
(3) Note. Where the subject matter includes a plurality of
discharge devices which are structurally combined, to be
classified in this or the indented subclasses there must not
be a common electrode for the plurality of discharge devices.
For example, discharge devices having a single cathode and a
plurality of anodes which cooperate with the single cathode
are excluded from this and the indented subclasses even
though the disclosure states that the device may be used in
place of a plurality of discharge device. Included in this
and the indented subclasses are structural combinations of
plural discharge devices and lamps or a discharge device and
a lamp where there is an interelectrode connection between
the electrodes of the different devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
306 and the subclasses specified in the notes thereto for
discharge devices which are provided with a plurality of
anodes and/or cathodes. Included in subclasses 306+ are
space discharge devices having a plurality of similar gaps
connected in series, such as for example, a row of spaced
sphere electrodes in which a discharge takes place along the
length of the row.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 7, for the combination of a consumable electrode
discharge device (e.g., an arc lamp or similar device having
means for feeding the electrodes together as they are
consumed) and another type of discharge device or electric
lamp.
315, Electric Lamp and Discharge Devices: Systems, 3, 32,
35+, and 64+ for the structural combination of a plurality of
discharge devices, or lamps, or a discharge device and a lamp
where the structural combination includes a circuit element
(e.g., switch, impedance, etc..), see subclasses 3+ where one
of the devices is a cathode-ray tube, subclass 32 where the
combination includes a lamp and a discharge device,
subclasses 35+ where the combination includes a plurality of
discharge devices, and subclasses 64+ where the combination
includes a plurality of lamp filaments (multifilament lamps).
In the devices in Class 315, the circuit element may be
connected between electrodes of different ones of the
combined devices, or to an electrode of one of the devices,
or not connected to any of the combined devices but be merely
mounted in the envelope, base or other part of the unitary
device. For the structural combinations of incandescent
lamps and discharge devices connected in circuit relation,
which are classified in Class 315, see (1) Note, parts b and
c, above.
378, X-Ray or Gamma Ray Systems or Devices, subclass 9, 92
and 193+ for plural source systems or devices.
Subclass:
2.1
Cathode-ray tube:
This subclass is indented under subclass 1. Subject matter
in which one of the devices is a cathode-ray generating
device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
364 for cathode ray devices, per se.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 3 for
devices which include the structural combination of a
plurality of cathode-ray tubes and which have a circuit
element (e.g., switch, inductance, condensers, resistances,
etc..) structurally combined therewith. See especially
subclasses 5.14+ for cathode-ray tube circuits wherein a
plurality of rays pass through or in a hollow distributed
parameter device, such as a wave guide, cavity resonator, or
coaxial line; and subclasses 5.16+, 5.27, 5.28, and 5.39+ for
cathode-ray tube system including a plurality of hollow
distributed parameter devices having a cathode ray passing
through or in. See subclass 9 for systems for supplying
electric current and/or potential to a plurality of
cathode-ray tubes.
378, X-Ray or Gamma Ray Systems or Devices, subclass 92 for
the structural combination of a plurality of X-ray tubes and
a circuit element which is combined therewith.
Subclass:
3
This subclass is indented under subclass 1. Subject matter
in which one electrode of one of the devices is electrically
connected to an electrode of another of the devices.
(1) Note. Excluded from this subclass and class are
structural combinations of a discharge device and an
incandescent lamp where the lamp filament is connected either
in series or in shunt relation with the discharge electrodes.
The excluded devices will be found in Class 315, Electric
Lamp and Discharge Devices: Systems, subclasses 46+ where
the filament is connected in shunt relation to the discharge
electrodes and in subclass 49 where the filament is connected
in series relation with the discharge electrodes.
(2) Note. If the connection between the electrodes includes
a circuit element such as a resistor, capacitor, inductance,
switch, or the like the combination is not classified in this
class but in Class 315. The devices in this subclass have a
conductive connection but no more.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, (see (1)
Note) above, and 3, 32+, 35+, 64+ for the structural
combination of a plurality of discharge devices, or lamps, or
a discharge device and a lamp where the structural
combination includes a circuit element (e.g., switch,
impedance, etc..), connected between electrodes of different
ones of such devices. See the notes to subclass 1 for the
subclasses which provide for the different types of devices.
Subclass:
5
This subclass is indented under subclass 1. Subject matter
in which one of the structurally combined devices is a
discharge device with a control electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
308 and the subclasses specified in the notes thereto for
other discharge devices which are provided with a control
electrode.
Subclass:
6
This subclass is indented under subclass 5. Subject matter
which includes a plurality of discharge devices each having a
control electrode.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 3 and 35+
where the structural combination also includes a circuit
element (e.g., switch, impedance, etc..), see subclasses 3+
where the devices are cathode-ray tubes and subclasses 35+
for other plural discharge devices.
Subclass:
7
This subclass is indented under the class definition.
Subject matter where the lamp or discharge device is provided
with an envelope and has an evacuating pump connected to the
envelope for evacuating the envelope.
(1) Note. In the devices in this subclass the evacuating
pump is designed for connection to the lamp or discharge
device during the use of the lamp or discharge device. Where
the arrangement is only for use during the manufacturing of
the lamp or discharge device see the reference to Class 226
below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
549 for devices under the class definition provided with
envelopes and having a getter, a gas or vapor generating
means or a pressure regulating means associated therewith.
SEE OR SEARCH CLASS:
53, Package Making, 79 and 403+ for methods of and apparatus
for gas filling and/or evacuating receptacles combined with
closing including lamps and discharge devices, and see the
Notes to subclass 403 for the disposition of related art.
141, Fluent Material Handling, With Receiver or Receiver
Coacting Means, subclass 4, 8 and 65+ for methods of and
apparatus for inducing a gas or vapor into or evacuating the
envelope of an electric lamp or space discharge device.
315, Electric Lamp and Discharge Devices: Systems, 108 for
electric lamp or a gas or vapor type discharge device systems
where the lamp or discharge device is provided with means for
regulating the pressure within the envelope of the device and
the system includes means to supply electrical energy to the
lamp or discharge device or to control the pressure
regulating means.
378, X-Ray or Gamma Ray Systems or Devices, subclass 123 for
X-ray tube systems where the X-ray tube is provided with
means for controlling the pressure within the envelope of the
tube.
417, Pumps, appropriate subclasses for miscellaneous
evacuating pumps.
Subclass:
8
This subclass is indented under the class definition.
Discharge devices which have a body other than an electrode,
placed adjacent to the discharge space and which is designed
to be heated to incandescence by the space discharge.
(1) Note. The body which is designed to be heated to
incandescence is not designed to be connected into the
circuit in any way but is only a light emitting body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
305 and the subclasses specified in the notes to the
definitions of that subclass for discharge devices which have
an electrode designed to be heated by the discharge,
including devices having cathanodes.
Subclass:
9
This subclass is indented under the class definition.
Devices having a filament and an additional body other than
an electrode designed to be heated to incandescence by the
filament.
(1) Note. The body designed to be heated to incandescence
is not designed to be connected in the circuit in anyway but
is designed only to be a light emitting body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
14 for pyroelectric type electric lamps which include a body
designed to be heated from a separate source such as an
electric filament. The body being a second class conductor
and being connected in the circuit so that when heated it
will conduct electric current and be heated by the current
flowing through it.
305 and the subclasses specified in the notes thereto for
discharge devices which have an electrode which is designed
to be heated to incandescence by the electric space discharge
between the cathode and the electrode.
Subclass:
10
This subclass is indented under the class definition.
Subject matter where the lamp or discharge device is provided
with means to indicate the temperature of some part of the
device.
SEE OR SEARCH CLASS:
374, Thermal Measuring and Testing, 100 for temperature
measurement, per se.
Subclass:
11
This subclass is indented under the class definition.
Subject matter where a lamp, discharge device or an electrode
therefor is provided with means or is combined with means for
modifying the temperature of the device, the electrode, or
some other part thereof.
(1) Note. Neither this nor any of the indented subclasses
provide for electric lamps including those of the discharge
device type, photosensitive discharge devices nor generators
of invisible radiation such as X-ray tubes, ultraviolet ray
generators in combination with a separable casing for the
lamp or device which is provided with means for modifying the
temperature of the lamp or device. See the class definition
for the classes which provide for the excluded subject
matter.
(2) Note. Indented subclass 26 provides for discharge
devices and lamps which are provided with an envelope formed
of two spaced apart integral walls, the space between the
walls being evacuated, gas filled, or otherwise containing
means to modify the temperature of the lamp or discharge
device. See the class definition for the classification of
double wall envelopes, per se.
(3) Note. Discharge devices and lamps provided only with
directly heated filaments, indirectly heated cathodes or
other types of thermionic cathodes, are not included in this
or the indented subclasses. This and the indented subclasses
provide only for lamps and discharge devices which have means
in addition to the filament or cathode for modifying the
temperature of the lamp or discharge device. Note that
discharge devices having liquid electrodes (e.g., mercury
vapor device) and electric heaters therefor are in subclass
16 and discharge devices having liquid electrodes and other
types of temperature modifiers for the liquid electrode are
in subclass 29.
(4) Note. See the class definition for other classes which
provide for the miscellaneous heat transfer apparatus such as
envelopes and casings for lamps or discharge devices with
temperature modifying means.
(5) Note. Discharge devices and lamps having a movable
electrode actuated by a thermally responsive means such as a
thermostat, with or without a heating means for the thermally
actuated moving means, are not classified in this and
indented subclasses, but are found in subclass 151.
SEE OR SEARCH THIS CLASS, SUBCLASS:
151 see (5) Note above.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 26 for consumable electrode discharge devices
provided with temperature modifying means and the electrical
systems therefor.
315, Electric Lamp and Discharge Devices: Systems, subclass
50 for electric lamps and discharge devices which are
provided with means for modifying the temperature of at least
part of the lamp or discharge device, the temperature
modifying means being either combined with or forming an
electrical impedance element. In subclass 50, of Class 315
will be found, for example, discharge devices which are
provided with means to conduct a cooling fluid to the
discharge device where the conduits for conducting the
cooling fluid are arranged to form a high resistance path
between a discharge device and the source of cooling fluid.
See subclasses 112+ and the subclasses specified in the notes
to those subclasses for electric lamp and discharge device
systems wherein the lamp or discharge device is provided with
means for modifying its temperature and the system includes
means to supply current to the lamp or discharge device or to
control the temperature modifying means.
Subclass:
11.5
This subclass is indented under subclass 11. Unitary devices
known as spark plugs.
(1) Note. See the glossary of this class definition, for a
definition of spark plugs. In general, the spark plugs
classified herein are the jump-spark type found in the
gasoline engine of an automobile.
(2) Note. This subclass contains patents relating to spark
plugs where the temperature modification of some part of the
plug is material. If the plug is provided with gaskets or
joints are of high or low heat conductivity, the patent would
be included. A plug having gaskets or joints formed of
particular materials would be classified in subclasses 144+
if it was not stated the materials were selected for their
temperature modification properties.
(3) Note. Preheating of the gas charge (before the spark
jumps) by heat left in the spark plug from a previous
explosion stroke cycle is not basis for classification in
this subclass unless such preheating is accomplished by means
which are especially provided to alter the temperature of the
spark plug.
SEE OR SEARCH THIS CLASS, SUBCLASS:
120 for spark plugs having means to feed a fluid, such as
priming fluid or air, where there is no disclosure that the
temperature of the spark plug is affected by the fluid feed.
126 for spark plugs having means to move an electrode in
response to a thermal change and having no means to influence
the thermal characteristics of the spark plug.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 15.3
and 152 for spark plug type electrical bushings (a spark plug
with no sparking electrodes claimed) having temperature
modifying means. See subclass 15.3 where the bushing is
combined with means for feeding, circulating or distributing
a temperature modifying fluid.
439, Electrical Connectors, 190 and 485+ for an electrical
connector, including the spark plug type, with temperature
modifying means.
Subclass:
12
This subclass is indented under subclass 11. Subject matter
in which the temperature modifying means includes a closed
path for circulating the temperature modifying means from the
lamp or discharge device to a heat exchange means and then
back to the lamp or discharge device to again modify the
temperature of the lamp or discharge device.
SEE OR SEARCH CLASS:
165, Heat Exchange, 104.11 recirculating heat exchange
system of general application.
Subclass:
13
This subclass is indented under subclass 11. Subject matter
in which a control means is provided for controlling the
operation of the temperature modifying means.
(1) Note. Included in this subclass are discharge devices
in casings provided with apertures which are controlled by
thermostatic means so as to regulate the amount of cooling
air which flows over the discharge device. If the
thermostatic means controls an electric circuit which in turn
controls an electric circuit which in turn controls
electrical means for controlling the apertures, the patent is
excluded from this class and will be found in Class 315. See
the reference to class 315 below.
SEE OR SEARCH CLASS:
165, Heat Exchange, 279 for miscellaneous heat exchange
apparatus provided with automatic control means.
236, Automatic Temperature and Humidity Regulation,
appropriate subclasses for automatic temperature regulation,
per se.
315, Electric Lamp and Discharge Devices: Systems, subclass
117 and the subclasses specified in the notes thereto for
discharge devices and lamps which are provided with
temperature modifying means and which include electrical
circuit means for controlling the operation of the
temperature modifying means.
Subclass:
14
This subclass is indented under subclass 11. Subject matter
having a glower formed of a second class conductor designed
for connection into an electrical circuit, and having means
for heating the glower to render it conductive.
(1) Note. The devices in this subclass are mostly
pyroelectric lamps.
(2) Note. See "Glossary" in the class definition for a
definition of second class conductor, glower, pyroelectric
lamps.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9 for devices under class definition which include a
filament and a body not designed to be connected into an
electrical circuit which is heated to incandescence by the
filament.
326 for the structure of pyroelectric glowers, per se.
SEE OR SEARCH CLASS:
252, Compositions, 500 for pyroelectric glower
compositions.
315, Electric Lamp and Discharge Devices: Systems, 115 for
pyroelectric lamp systems having an electric heater for the
glower and circuit means for controlling or supplying
electric current to the glower or the heater element, and
subclass 359 for miscellaneous systems for supplying electric
current to pyroelectric lamps.
338, Electrical Resistors, 25 for electrical resistors whose
resistance value is responsive to a change in ambient
temperature.
Subclass:
15
This subclass is indented under subclass 11. Subject matter
in which the temperature modifier is an electric heater.
(1) Note. This subclass does not include lamps or discharge
devices where the only heating means for the lamp or
discharge device is a light emitting filament, a directly
heated or indirectly heated cathode or other thermionic
cathode or where the heating means is a means for heating a
gas or vapor generating material (e.g., a getter). See
subclasses 549+ for the discharge devices and lamps with
electric heating means for a gas or vapor generating
material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
14 where the lamp is a pyroelectric lamp and is provided
with an electric heater to heat the glower.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 115 for
electric lamp and discharge device systems where the lamp or
discharge device is provided with an electrical heater to
modify the temperature of the lamp or discharge device and
the system includes means to control or supply current to the
heater or the lamp or discharge device.
Subclass:
16
This subclass is indented under subclass 15. Subject matter
in which the lamp or discharge device is provided with a
liquid electrode and the electric heater is provided to heat
the liquid electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
29 for other devices under subclass 11 having liquid
electrode and having temperature modifying means for the
liquid electrode.
163 for other liquid electrode discharge devices.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 115 for
lamp and discharge device systems where the lamp or discharge
device is provided with a liquid electrode and an electric
heater therefor, the system including means to control or to
supply current to the heater or to the lamp or discharge
device.
Subclass:
17
This subclass is indented under subclass 11. Subject matter
in which a lamp or discharge device is provided with a an
integral spaced double walled envelope, and discharge devices
which are provided with envelopes and in which the means for
modifying the temperature of the discharge device includes a
jacket or casing which encloses the envelope of the device or
a portion thereof.
(1) Note. Neither this nor any of the indented subclasses
provide for electric lamps including those of the discharge
device type, photosensitive discharge devices nor generators
of invisible radiation such as X-ray tubes, ultraviolet ray
generators in combination with a separable casing for the
lamp or device which is provided with means for modifying the
temperature of the lamp or device. See the class definition
for the classes which provide for the excluded subject
matter.
(2) Note. The double-walled envelopes specified above
includes only walls which are spaced apart. The double
walled envelope may be provided with means for circulating a
fluid between the spaced walls or the space between the walls
may be evacuated, gas filled or filled with a heat insulating
or transmitting material. See the class definition for the
classification of double-wall envelopes, per se.
(3) Note. The jacket or casing which encloses the discharge
device or lamp must have its walls spaced from the envelope
of the lamp or discharge device. Where the device is
provided with a sleeve with heat exchange means such as
radiating fins which fit over and into contact with the
envelope of the device, the device is excluded from this and
the indented subclass and will be found in subclass 44
below.
(4) Note. Included as separable casings and jackets are
structures formed of coiled conduits which are designed to
receive the discharge device and to transfer heat to or from
the envelope of the discharge device.
(5) Note. See the class definition for other classes which
provide for the miscellaneous heat transfer apparatus such as
envelopes and casings for lamps or discharge devices which
are provided with temperature modifying means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
44 see (3) Note, above.
312 and the subclasses specified in the notes thereto for
devices under the class definition which are provided with an
envelope and which have a casing or jacket for the envelope.
324 and the subclasses specified in the notes thereto for
devices under the class definition which do not have an
envelope but which have a casing or jacket for the device.
SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 74 for a removable device to be
heated or cooled projecting into a casing, and subclasses
154+ for coaxial enclosures.
215, Bottles and Jars, 12.1 for receptacles of glass or
other ceramic or similar materials, of the bottle, jar, or
jug type, which are encased in a protective casing or jacket
or having spaced walls.
220, Receptacles, 2.1 for miscellaneous envelopes, casings
and jackets designed for use with electric lamps, discharge
devices and similar devices and subclasses 415+ for
miscellaneous receptacles having double walls where the inner
and outer walls are spaced apart, with or without intervening
packing or insulation.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 26 for discharge devices of the consumable
electrode type (e.g., arc lamps) which are provided with
means for modifying the temperature of a portion of the
device, the temperature modifying means including a separable
casing or jacket for a portion of the device.
Subclass:
18
This subclass is indented under subclass 17. Subject matter
in which the envelope of the lamp or discharge device is
provided with an integral double wall envelope made in whole
or in part of electrically conductive material, and discharge
devices which are provided with envelopes formed in whole or
in part of electrically conductive material and in which the
casing or jacket encloses the electrically conductive portion
of the envelope or a portion thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
44 for other lamps and discharge devices under subclass 11
which have a conductive envelope and which are provided with
means for modifying the temperature of the envelope wall.
Included in subclass 44 are discharge devices which are
provided with a separable sleeve which fits about a portion
of the envelope wall, the sleeve being provided with heat
exchange means (e.g., radiating fins).
246 for discharge devices which are provided with a
conductive envelope portion (e.g., anode) and means to
support one or more electrodes (e.g., cathode, grid) within
the conductive envelope portion usually by means of the
closure for the conductive envelope portion.
317 for devices under the class definition having envelopes
or a part thereof made of conductive material.
SEE OR SEARCH CLASS:
220, Receptacles, subclass 2.3 for envelopes for discharge
devices and lamps which are made in whole or in part of
conductive material.
Subclass:
19
This subclass is indented under subclass 18. Subject matter
wherein the lamp or discharge device has a plurality of
electrodes and means are provided for modifying the
temperature of a plurality of the electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
23 for other lamps and discharge devices which are provided
with a plurality of electrodes, a double wall jacket or
casing for the envelope and means for circulating a fluid
within the double wall envelope, casing, or jacket to modify
the temperature of a plurality of the electrodes.
28 for other lamps and discharge devices which are provided
with a plurality of electrodes, a double wall envelope or a
casing or jacket for the envelope and means for modifying the
temperature of a plurality of the electrodes.
Subclass:
20
This subclass is indented under subclass 18. Subject matter
where the lamp or discharge device includes a temperature
modifying baffle structure which extends across or into the
envelope.
(1) Note. In some of the devices in this subclass the
baffle comprises a re-entrant portion of the envelope wall
and the temperature modifying fluid may enter the re-entrant
portion. In other of the devices, a heat transfer device,
such as a radiator member for containing a heat transfer
fluid, is enclosed within the envelope of the device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 for other lamps and discharge devices which do not have
an enclosing casing or jacket and which have an internal
temperature modifying baffle.
34 for lamps and discharge devices which do not have an
enclosing casing or jacket where the envelope is provided
with a condensing chamber or surface.
Subclass:
21
This subclass is indented under subclass 18. Subject matter
in which the conductive envelope portion of the lamp or
discharge device is cylindrical in form and is designed for
use as one of the electrodes of the device.
(1) Note. Many of the devices in this subclass are
discharge devices such as are used as the transmitting tube
in radio transmitting systems.
SEE OR SEARCH THIS CLASS, SUBCLASS:
246 for discharge devices which are provided with a
cylindrical conductive envelope portion (e.g., anode) and
means to support one or more electrodes (e.g., cathode, grid)
within the conductive envelope portion usually by means of
the closure for the cylindrical envelope portion.
317 and the subclasses specified in the notes thereto for
other lamps and discharge devices under the class definition
in which an electrode forms a portion of the envelope.
Subclass:
22
This subclass is indented under subclass 17. Subject matter
in which the structure is designed so that a temperature
modifying fluid may be circulated in the space between the
envelope and the jacket or casing or between the walls of the
double walled envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
18 where the envelope of the lamp or discharge device is
made in whole or part of conductive material.
36 for discharge devices and lamps which are not provided
with an envelope but which includes a jacket or casing for
the discharge device or lamp or a part thereof, and means to
apply a temperature modifying fluid to the lamp or discharge
device. Some of the devices in subclass 36 are open-air arc
lamps with casing means around portions of the lamp to direct
a cooling fluid into contact with a portion of the lamp.
Subclass:
23
This subclass is indented under subclass 22. Subject matter
where the lamp or discharge device has a plurality of
electrodes and means are provided for modifying the
temperature of a plurality of the electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19 where the lamp or discharge device is provided with an
envelope which is made in whole or part of a conductive
material.
28 for other lamps and discharge devices which are provided
with a plurality of electrodes, a double wall envelope or a
casing or jacket for the envelope and means for modifying the
temperature of a plurality of the electrodes.
Subclass:
24
This subclass is indented under subclass 22. Subject matter
having means (e.g., baffles) within the casing or jacket
which encloses the envelope or between the walls of the
double-walled envelope for directing the flow of the
temperature modifying fluid as it flows through the casing,
jacket or doubled envelope.
Subclass:
25
This subclass is indented under subclass 17. Devices in
which the space between the double wall envelopes or between
the envelope and the casing or jacket is sealed off from the
atmosphere and from the space within the envelope of the lamp
or discharge device.
(1) Note. This subclass includes electric lamps whether of
the discharge device type or not, photosensitive discharge
devices, generators of invisible ray energy (e.g., X-ray
tubes, ultraviolet lamps, etc..) only when the casing or
jacket is integrally united with the envelope of the device.
See (1) Note to the definition of subclass 11 with respect to
the classification of such subject matter where the casing or
jacket is not integrally united.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27 for other discharge devices and lamps which are provided
with a double wall envelope or which have a jacket or casing
for the envelope of the device, the space between the
envelope walls or between the casing or jacket and the
envelope containing a heat conserving or heat insulating
material.
312 and the subclasses specified in the notes thereto, for
miscellaneous and discharge devices which are provided with
an envelope and a casing or jacket for the envelope.
317 for miscellaneous lamps and discharge devices which are
provided with a double-wall envelope where the heat
transmitting properties of the double wall envelope are not
involved.
Subclass:
26
This subclass is indented under subclass 25. Subject matter
in which the lamp or discharge device is provided with a
double wall envelope, the envelope walls being formed as a
unitary, integral body.
(1) Note. Included in this subclass are lamps and discharge
devices which are provided with a double-walled envelope or
an envelope and a casing where the space between the double
walls or between the envelope and casing is evacuated or
filled with a gas or vapor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
317 for miscellaneous lamps and discharge devices which are
provided with a double walled envelope where the heat
transmitting properties of the double-wall envelope are not
involved.
SEE OR SEARCH CLASS:
215, Bottles and Jars, subclass 13.1 for receptacles of the
bottle or jar type made of glass or other ceramic or similar
materials and having spaced walls, with the interwall space
evacuated or filled with a gas or vapor for heat insulation
purposes.
220, Receptacles, 2.1 for double walled envelopes designed
for use with lamps and discharge devices.
Subclass:
27
This subclass is indented under subclass 17. Subject matter
in which the space between the casing or jacket which
encloses the envelope or the space between the double-walled
envelope, includes means for preventing the flow of heat to
or from the device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25 where the space between the double walls or between the
envelope and the casing or jacket is sealed off from the
atmosphere and from the space within the envelope of the
device. The sealed off space may be evacuated or filled with
a gas or vapor. Note indented subclass 26 for discharge
devices and lamps provided with an integral double-wall
envelope.
SEE OR SEARCH CLASS:
215, Bottles and Jars, subclass 13.1 for receptacles of the
bottle or jar type made of glass or other ceramic or similar
material and having spaced walls with the interwall space
containing a heat insulating means.
220, Receptacles, 2.1 for double-walled envelopes designed
for use for lamps and discharge devices, subclasses 415+ for
miscellaneous receptacles having double-walls where the inner
and outer walls are spaced apart and the intervening space
contains a heat insulating material.
Subclass:
28
This subclass is indented under subclass 17. Subject matter
where the lamp or discharge device is provided with a
plurality of electrodes and means are provided for modifying
the temperature of a plurality of the electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19 where the envelope of the lamp or discharge device is
made in whole or part of electrical conductive material.
23 where the structure includes means to circulate a fluid
between the walls of a double walled envelope of a lamp or
discharge device or between the envelope and the enclosing
casing or jacket of a discharge device.
Subclass:
29
This subclass is indented under subclass 11. Devices having
a liquid electrode and having means for modifying the
temperature of the liquid electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16 where the means for modifying the temperature of the
liquid electrode is an electric heater.
163 for liquid electrode discharge devices, per se.
Subclass:
30
This subclass is indented under subclass 11. Devices where
the lamp or discharge device is provided with a hollow
electrode or a hollow electrode lead conductor, means being
provided to modify the temperature of the hollow portion of
the electrode or the electrode lead.
(1) Note. In many of the devices in this subclass a fluid
is circulated into the hollow electrode or electrode lead.
See indented subclasses 31 and 32 where the hollow electrode
or lead constitutes a closed path so that fluid may be
circulated through the electrode or lead.
Subclass:
31
This subclass is indented under subclass 30. Devices in
which the electrode is in the form of a fluid conduit which
is in the form of a coil.
SEE OR SEARCH CLASS:
138, Pipes and Tubular Conduits, subclasses 100-178 for
pipe structure, per se.
165, Heat Exchange, appropriate subclasses for a heat
exchanger, per se.
Subclass:
32
This subclass is indented under subclass 30. Devices in
which the hollow electrode or lead is provided with a closed
conduit designed for the passage of a temperature modifying
fluid therethrough.
(1) Note. In many of the devices in this subclass the
electrode or lead is provided with two coaxial tubes one
within the other and the fluid flows in one direction through
the inner tube and in the opposite direction between the
walls of the inner and outer tubes, but this subclass is not
limited to such devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31 where the electrode is in the form of a conduit which is
in the form of a coil.
35 and the subclasses specified in the notes thereto for
devices under subclass 11 in which the temperature modifying
means includes means for applying a temperature modifying
fluid (e.g., a cooling fluid) to some part of the device,
which part may be an electrode or lead.
Subclass:
33
This subclass is indented under subclass 11. Devices having
an envelope and having a temperature modifying baffle
entending across or into the interior of the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
20 where the envelope is made in whole or part of conductive
material and has a double-wall or is enclosed within a casing
or jacket.
Subclass:
34
This subclass is indented under subclass 11. Devices where
the device is provided with an envelope, the envelope
including a chamber having a surface which has a large heat
dissipating surface for condensing vapors generated during
the operation of the device.
(1) Note. Most of the devices in this subclass are mercury
vapor discharge devices and the condensing surface is
designed to condense the mercury vapor into its liquid
state.
(2) Note. Included in this subclass are all discharge
devices where the envelope is provided with any portion such
as an enlarged portion or a portion located in a place which
remains relatively cool during the operation of the device,
where the purpose of such portion is to condense vapors and
to change the vapors to either their liquid or solid state.
(3) Note. See the classification of envelopes designed for
use with lamps and discharge devices which are provided with
temperature modifying means. See the class definition for
the classification of envelopes, per se, designed for use
with electric lamps and discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17 where the device is provided with either a double-wall or
a jacket or casing for the envelope. Note especially
indented subclass 20 where the device is provided with an
internal temperature modifying baffle and subclasses 22+,
where means are provided for circulating a fluid in contact
with the envelope wall.
33 for devices within the definition of subclass 11 where
the envelope of a device is provided with an internal
temperature modifying baffle.
35 for discharge devices and lamps which are provided with
envelopes with tubular passageways or conduits formed in the
envelope and passing through the lamp near the filament or
other heated portion of the device so that the conduit
becomes hot and the heated air rises to draw cold air in at
the bottom of the conduit.
Subclass:
35
This subclass is indented under subclass 11. Subject matter
wherein the temperature of the discharge device or lamp is
modified by applying a heat exchange liquid to the discharge
device or lamp or where the structure includes means to
direct the flow of the temperature modifying fluid.
(1) Note. Subclasses 35+, includes discharge devices and
lamps which do not have envelopes and which are provided with
means for contacting a portion of the device with a heat
exchange fluid or liquid. The fluid or liquid containing
means may be arranged so that the fluid or liquid may be
circulated. Also included are lamps and discharge devices
with envelopes with tubular passage ways or conduits formed
in the envelope and passing through the lamp near the
filament, or other heated portion of the device so that the
conduit becomes hot and the heated air rises to draw cold air
in at the bottom of the conduit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
12 where the apparatus includes a recirculating system with
a heat exchanger in it so that the temperature modifying
fluid is circulated from the lamp or discharge device to the
heat exchanger then back again to the lamp or discharge
device.
17 where the lamp or discharge device is provided either
with a spaced double-walled envelope or with an envelope and
a casing or jacket around the envelope, the structure
including means to modify the temperature of the lamp or
discharge device. See especially subclasses 22+, where means
are provided to circulate a temperature modifying fluid in
the space between the double-walls of the envelope or between
the envelope and the casing or jacket.
29 where the lamp or discharge device is provided with a
liquid electrode.
30 where the lamp or discharge device is provided with a
hollow electrode or a hollow electrode lead conductor and
means are provided to modify the temperature of the hollow
portion of the electrode or electrode lead.
33 where lamp or discharge device is provided with an
envelope and an internal temperature modifying baffle which
extends across or into the envelope.
34 where the envelope is provided with either a condensing
chamber or condensing surface.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 26 for discharge devices of the consumable
electrode type (e.g., arc lamps) which are provided with
means for directing the flow of a temperature modifying
medium over a portion of the device. The flow directing means
may include a casing or jacket for a portion of the device.
See indented subclass 29 where the temperature of the device
is modified by means of a heat exchange liquid.
Subclass:
36
This subclass is indented under subclass 35. Devices in
which the means for applying the temperature modifying fluid
includes a jacket or casing which surrounds at least a part
of the lamp or discharge device or which is associated with
the means for applying the temperature modifying fluid so as
to direct the temperature modifying fluid upon some part of
the lamp or discharge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17 where the lamp or discharge device is provided either
with a spaced double walled envelope or with an envelope that
has a casing or jacket which surrounds at least a portion of
the envelope.
324 for miscellaneous electric lamps and discharge devices
which do not have envelopes but which are provided with
casings and jackets.
SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 74 for a removable device
projecting into a chamber containing a heat exchanger fluid.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 26 for discharge devices of the consumable
electrode type (e.g., arc lamps) which are provided with a
jacket or casing for directing the flow of a temperature
modifying medium over a portion of the device.
Subclass:
37
This subclass is indented under subclass 11. Devices which
are provided with a filament, a directly heated cathode or an
indirectly heated cathode and which include means to modify
the temperature of the filament or cathode.
(1) Note. The structure must include more than a filament,
a directly heated cathode or an indirectly heated cathode.
For example, included in this and the indented subclass are
devices in which a heat conserving shield is placed about the
cathode to conserve the heat of the cathode and devices which
have means to conduct heat from a portion of the cathode so
as to reduce the temperature of the cathode portion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39 for other devices under subclass 11 which are provided
with a cathode which may be a thermionic cathode other than a
directly or indirectly heated cathode and which includes
means to modify the temperature of the cathode.
337 for the structures of indirectly heated cathodes, per
se.
341 for the structure of filaments and directly heated
cathodes.
346 for the structure of thermionic cathodes.
Subclass:
38
This subclass is indented under subclass 37. Devices in
which the temperature modifying means is a hollow shield
which surrounds at least a portion of the filament or heated
cathode.
Subclass:
39
This subclass is indented under subclass 11. Devices which
are provided with an envelope and an electrode within the
envelope, heat transfer means being provided to modify the
temperature of the electrode.
(1) Note. The heat transfer means may be mounted upon or
form a part of the electrode. For example, an electrode may
be formed with a heat indicating surface.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16 and 29, where the electrode is a liquid electrode. See
subclass 16 where an electric heater is provided for the
liquid electrode.
23 and 28, where the device is either provided with a double
spaced wall envelope or is provided with an envelope and a
jacket or casing which surrounds at least a portion of the
envelope and means are provided to modify the temperature of
a plurality of electrodes within the envelope. See subclass
23, where the structure includes means to circulate a heat
transfer fluid between the envelope walls or between the
envelope and the casing or jacket.
28 see the reference to subclass 23 above.
29 see the reference to subclass 16 above.
30 where the electrode or the electrode lead is hollow and
means are provided to modify the temperature of the hollow
portion of the electrode or lead.
37 where the electrode which has its temperature modified is
either a filament or a thermionic cathode.
42 for devices under subclass 11 which are provided with an
envelope and an electrode lead-in conductor or an electrode
support, the electrode lead-in or the electrode lead-in
support having heat transfer means mounted thereon or
including means to modify the flow of heat along the
electrode lead-in or support. Subclass 42 also provides for
devices under subclass 11, which are provided with an
envelope and which have the heat transfer means mounted upon
a lead-in wire exterior to the envelope of the device.
43 for devices under subclass 11 which are provided with an
envelope and which have temperature modifying means to
protect the lead-in-seal or the stem of the envelope from
excessive temperatures.
44 for discharge devices under subclass 11 which have the
envelope formed of conductive material, the conductive
material being designed for use as an electrode, heat
transfer means being arranged to modify the temperature of
the conductive envelope wall.
SEE OR SEARCH CLASS:
378, X-Ray or Gamma Ray Systems or Devices, 127 for X-ray
tubes provided with movable targets, usually rotatable, so
that the temperature of the target may be maintained cool by
moving the target and changing the area exposed to the
electron beam during the operation of the device.
Subclass:
40
This subclass is indented under subclass 39. Devices in
which the temperature modifier comprises a radiating surface
adapted to transmit or receive radiant heat.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45 for other devices under subclass 11 in which the
temperature modifying means is a radiating surface adapted to
transmit or receive radiant heat.
SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 133 for a heat exchanger with a
coated, roughened or polished surface, and subclasses 177+
for a tubular structure with heat transfer means.
Subclass:
41
This subclass is indented under subclass 40. Devices in
which the radiating surface is either composed of a material
or is coated with a material which is designed to readily
radiate heat or in which the radiating surface is roughened
to facilitate the radiation.
Subclass:
42
This subclass is indented under subclass 11. Devices which
are provided with an envelope and electrode within the
envelope and a lead-in conductor or electrode support for the
electrode, the device having either a heat transfer means
mounted upon the lead-in or electrode support or the lead-in
or the electrode support including means to modify the flow
of heat along the lead-in or support.
(1) Note. The heat exchange means may be mounted upon the
lead-in conductor exteriorly of the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30 where the electrode lead-in conductor is hollow (e.g., is
provided with a conduit) and means are provided to modify the
temperature of the hollow portion of the lead-in.
39 for devices under subclass 11 which have a heat transfer
means mounted upon or forming a part of an electrode within
the envelope of the device.
43 for devices under subclass 11 which are provided with
means to protect the lead-in-seal or stem of the envelope
from excessive temperatures.
Subclass:
43
This subclass is indented under subclass 11. Devices in
which the device is provided with an envelope and an
electrode lead-in-seal or a stem and temperature modifying
means are provided for protecting the lead-in-seal or the
stem of the envelope from excessive temperatures.
SEE OR SEARCH THIS CLASS, SUBCLASS:
42 where the device includes a heat transfer means mounted
upon the lead-in conductor or electrode support or where the
lead-in conductor or support is formed so as to modify the
flow of heat along the lead-in conductor or support.
Subclass:
44
This subclass is indented under subclass 11. Devices which
are provided with an envelope and where the temperature
modifier is designed to modify the temperature of the
envelope wall or some portion thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16 and 29, for devices which have a liquid electrode in
contact with the envelope wall and which are provided with
means to modify the temperature of the liquid electrode. See
subclass 16 where the temperature modifier is an electric
heater.
17 where the device is provided with a spaced double wall
envelope or is provided with a casing or jacket for the
envelope, the structure including means to modify the
temperature of the envelope wall.
29 see the reference to subclass 16 above. 34, where the
envelope is provided with a chamber or surface for condensing
vapors generated within the envelope.
35 where the envelope wall has its temperature modified by
using liquids or where the temperature modifying means
includes means for directing the flow of the temperature
modifying fluid.
42 where the device is provided with a temperature modifying
means mounted on or forming a part of the lead-in conductor
or electrode support so as to prevent the transmission of
heat to the envelope from the electrodes.
43 where the envelope is provided with means for protecting
the lead-in seal or stem of the envelope from excessive
temperatures.
Subclass:
45
This subclass is indented under subclass 11. Devices in
which the temperature modifier comprises a radiating surface
adapted to transmit or receive radiant heat.
SEE OR SEARCH THIS CLASS, SUBCLASS:
40 where an electrode within an envelope is provided with a
radiating surface.
Subclass:
46
This subclass is indented under subclass 11. Devices in
which the temperature modifier is a means for conducting
heat.
(1) Note. Included in this subclass are devices which have
a portion made of a large size or of a special material so
that the heat will be conducted from a place which it is
desired to keep cool to a place where the heat will be
dissipated.
SEE OR SEARCH CLASS:
165, Heat Exchange, 177 for a tubular structure with
attached heat transmitter.
Subclass:
47
This subclass is indented under subclass 11. Devices which
include means for preventing the flow of heat to or from the
device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25 and 27, for devices under subclass 11 where the device is
provided with a spaced double wall envelope, or where the
device is provided with an envelope and a casing or jacket
for the envelope, see subclasses 25+ where the space between
the double walls or between the envelope and the casing or
jacket is sealed and either evacuated or filled with a gas or
vapor (e.g., for heat insulation), and see subclass 27 where
the space between the double walls or between the envelope
and casing contains other heat insulating means.
SEE OR SEARCH CLASS:
220, Receptacles, appropriate subclasses for miscellaneous
receptacles provided with heat insulating means, see
especially 2.1 for envelopes and casings designed for use
with lamps and discharge devices, and subclasses 400+ and
415+ for miscellaneous receptacles provided with linings.
252, Compositions, subclass 62 for miscellaneous heat
insulating compositions.
Subclass:
48
This subclass is indented under the class definition.
Devices which are provided with a handle.
(1) Note. This subclass excludes electric lamps including
those of the discharge device type where the handle is
separable from the electric lamp. For the excluded electric
lamps, see Class 362, Illumination, appropriate subclasses,
see especially subclasses 190+ for portable self contained
illuminating devices which include a casing or handle for the
lamp and means to supply the lamp with electricity (e.g.,
flashlights), subclasses 399+, and subclasses 382+ for
miscellaneous light supports including separable handles for
electric lamps.
(2) Note. Among the devices included in this subclass are
spark gaps mounted on handles such as are used to ignite gas
burners.
SEE OR SEARCH THIS CLASS, SUBCLASS:
49 for devices under the class definition combined with a
support or a detachable electrical connector for the device.
SEE OR SEARCH CLASS:
219, Electric Heating, appropriate subclasses, for arc
welding electrode holders in which a handle supports a single
electrode. Where the handle supports two or more electrodes
and the device is not structurally limited to use in electric
welding or heating, classification is in Class 313.
315, Electric Lamp and Discharge Devices: Systems, subclass
33 for portable self contained devices which include a
source of energy, a discharge device of the arc, spark, gas
or vapor type (other than a lamp), and the system for
connecting the source of energy to the discharge device.
362, Illumination, see (1) Note, above.
607, Surgery: Light, Thermal, and Electrical Application,
subclass 88 for electric lamps which are limited by claimed
structure to use for therapeutic purposes which are provided
with a handle and subclass 150 for discharge devices which
are designed to transmit high frequency electric current into
the human body which are provided with a handle. The devices
in this subclass sometimes include an envelope with a
confined gas or vapor, an electrode within the envelope and a
handle for the device, the human body being used as the other
electrode in the use of the device.
Subclass:
49
This subclass is indented under the class definition.
Subject matter where the lamp or discharge device is provided
with a support or has combined therewith a detachable
electrical connector.
(1) Note. This subclass excludes electric lamps including
those of the discharge device type, generators of invisible
rays (e.g., X-ray tubes, ultraviolet ray generators) in
combination with a separable support for the device. See the
class definition for the excluded subject matter.
(2) Note. See the class definition of this class (Class
313) for the location of a distinct electrical connector and
for line notes distinguishing this class and Class 439,
Electrical Connectors.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 138
for insulating supports for elongated tubular lamps. Also,
see the reference to Class 248, subclass 50, below.
248, Supports, appropriate subclasses for miscellaneous
supports. Note especially subclass 50 for supports designed
to support elongated tubing such as gas or vapor lamps (see
the reference to Class 174, above), and subclasses 500+ for
the combination of a lamp or discharge device envelope and a
support therefor (e.g., a socket) with where no electrical
features are claimed.
439, Electrical Connectors, 296 for an electrical coupling
part with coupling movement actuating means or retaining
means in addition to the contact thereof; and subclasses 527+
for a connector having mounting or supporting means. Class
439 includes the combination of a specific electrical
connector with a broadly recited electric lamp. See (2)
above.
Subclass:
50
This subclass is indented under subclass 49. Subject matter
in which a support is designed to reduce the transmission of
vibrations from and/or to the supported lamp or discharge
device and subject matter under subclass 49 in which the
support is resilient.
(1) Note. The support may be a detachable electric
connector (e.g., socket structure).
SEE OR SEARCH CLASS:
188, Brakes, 378 for devices having significant mass, which
are attached to articles for damping the vibrations by
inertia; and subclass 381 for devices damping vibrations by
friction.
248, Supports, 560 for resilient supports.
362, Illumination, subclass 306 and 390, for illuminating
devices which include a resilient light support.
Subclass:
51
This subclass is indented under subclass 49. Subject matter
in which the support is detachable and includes an electrical
connector for the lamp or discharge device, and lamps and
discharge device which have combined therewith a detachable
electrical connector.
(1) Note. See the class definition for the classification
of lamps including discharge devices, lamps, generators of
invisible ray energy (e.g., X-ray tubes, ultraviolet ray
generators), in combination with a detachable support which
may include an electrical connector for the device. See the
class definition for the classification of detachable
electrical connectors, per se, and the line between this
class and Class 439, Electrical Connectors.
SEE OR SEARCH CLASS:
248, Supports, 500 for hold-down devices of general
application.
439, Electrical Connectors, 296 especially subclasses 357+
for the combination of an electrical connector with the
envelope of a lamp, including a resilient finger for holding
that device to a mating electrical connector.
Subclass:
52
This subclass is indented under the class definition.
Devices which are convertible from one type of device to
another type of device.
(1) Note. Many discharge devices may be considered to be
convertible from one type of discharge device to another type
of discharge device simply by not using some of the
electrodes of the discharge device. For example the usual
triode may be used as a half-way rectifier by not connecting
the grid in any circuit. In the device in this subclass some
means must be provided which is limited to use in converting
the device from one type of device to another type of device.
An example of the subject matter in this subclass is an
incandescent lamp which has the lead wires coated with
electron emissive material so that when the filament fails a
glow discharge may take place between the coated lead wires
thus converting the incandescent lamp to a discharge device
type lamp. Note that where the converting means is an
electric switch or other circuit element such as an
impedance, the device is excluded from this class and will be
found in Class 315, subclasses 32+. Also excluded from this
subclass are incandescent lamps having plural filaments, such
as a high resistance filament and a low resistance filament,
which may be converted from one type of incandescent lamp to
another merely by connecting one filament or the other in the
circuit.
(2) Note. See the class definition for the classification
of lightning arresters of the arc or spark type which are
designed to have the electrodes brought into contact with
each other upon prolonged use of the device thereby
establishing a conductive path through the device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for plural unit devices under the class definition, that
is, devices which include in structural combination a
plurality of discharge devices, a plurality of lamps other
than mere multiple filament lamps, or a lamp and discharge
device.
236 for devices under the class definition which are
provided with a spare or extra electrode which is not used
until one of the electrodes fails to operate properly when
the spare or extra electrode is used to replace the defective
electrode.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, see (1)
Note above.
Subclass:
53
This subclass is indented under the class definition.
Discharge devices in which a flame provides an ionized path
for the discharge.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, 15 for apparatus for smoke
precipitation of the electrostatic type having electrodes
between which the combustion products (e.g., smoke) are
passed and which attract particles in the combustion products
by means of electrostatic fields.
123, Internal-Combustion Engines, subclass 594 for high
tension ignition systems for internal combustion engines,
which include a jump type spark gap igniter operating within
a cylinder.
361, Electricity: Electrical Systems and Devices, 247 for
electrical devices for igniting combustible material which
include spark or arc electrodes and means to bring the
electrodes into contact with the combustible material.
431, Combustion, subclass 25 for a burner control circuit
utilizing the current rectifying effect of a flame and
subclasses 78+ for a burner controlled by an electric control
circuit that senses flame.
Subclass:
54
This subclass is indented under the class definition.
Devices which are provided with a radioactive material, the
radioactive properties of the material being utilized in the
operation of the device.
(1) Note. In the patents in this subclass the radioactive
property of the material must have some significance in the
operation of the device. The mere use of a radioactive
substance such as thorium on or in a cathode to render it
electron emissive, the use of uranium stained glass, or other
such uses of radioactive materials where the radioactive
properties of the material are not involved in the operation
of the device is not considered sufficient to cause
classification of the device in this subclass.
SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 381 and 382 for an invisible
radiant energy responsive gas discharge device having a
radioactive gas, a gas borne radioactive material or a
radioactive source within the device to ionize the gas of the
device.
252, Compositions, 625 for radioactive compositions, per
se.
Subclass:
62
This subclass is indented under the class definition.
Discharge devices provided with magnetic means for confining
the path of the particles of the space discharge into a
circular path and having means for accelerating the particles
tangentially of the circular path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
153 for other devices under the class definition which have
a magnetic device associated therewith.
359.1 for discharge devices including means to accelerate
positive or negative ions.
421 for cathode-ray tubes with means to deflect a beam of
electrons.
441 for cathode-ray tubes including means to accelerate a
focus or beam of electrons.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
502 for a cyclotron.
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, appropriate subclasses for nuclear reactions and
nuclear reactors.
Subclass:
93
This subclass is indented under the class definition.
Devices which are provided with means responsive to invisible
radiant energy other than ultraviolet rays or heat rays or
radio waves, for altering the operation of the device.
(1) Note. Such rays may be protons, alpha particles,
X-rays, gamma rays, cosmic rays or similar ray energy.
(2) Note. Many discharge devices having an envelope and a
confined gas or vapor atmosphere may be used as
Geiger-Mueller counter tubes. This subclass is limited to
devices which include some structure which is especially
provided because the device is responsive to the invisible
ray energy and to discharge devices which are claimed as
being Geiger-Mueller counter tubes. For other types of gas
or vapor discharge devices see subclasses 182+, and the
subclasses specified in the notes thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
54 for devices within the class definition which include a
radioactive material.
103 for devices within the class definition having an
electrode which is secondarily emissive, i.e., which emits
secondary electrons when bombarded by primary electrons from
another source.
523 for photosensitive devices within the class definition.
Especially see indented subclass 539 for those which are
designed to be responsive to radiant energy, (ultraviolet or
heat rays or visible light) of particular wave lengths.
539 see reference to subclasses 523+, above.
567 see (2) note, above.
Subclass:
103
This subclass is indented under the class definition.
Discharge devices having a secondary emissive electrode.
(1) Note. The devices in this subclass are also known as
"electron multipliers".
SEE OR SEARCH THIS CLASS, SUBCLASS:
106 for devices under the class definition provided with
means to prevent secondary emission from some part of the
device.
346 and the subclasses specified in the notes thereto, for
secondary emissive electrodes, per se.
377 387 and 399, for cathode-ray tubes with a secondary
emissive electrode.
532 where the discharge device includes a photosensitive
electrode in addition to the secondary emissive electrode.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
39.63 for discharge devices having an electrode formed so as
to provide a structure having distributed inductance and
capacitance and operable in a magnetic field (e.g.,
magnetrons), the discharge device being provided with a
secondary emissive electrode.
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, 572 for miscellaneous secondary
emissive circuits.
329, Demodulators, appropriate subclasses for demodulators or
detectors generally with secondary emission.
330, Amplifiers, subclass 42 for amplifiers having a
secondary emitter discharge device.
331, Oscillators, subclass 89 for oscillator systems
utilizing a magnetron type tube having a secondary electron
emissive electrode, and subclass 133 for negative resistance
oscillators utilizing a tube of the secondary electron
emissive type.
Subclass:
104
This subclass is indented under subclass 103. Discharge
devices having a plurality of secondarily emissive
electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
306 and the subclasses specified in the notes thereto for
other discharge devices which have a plurality of cathodes.
Subclass:
105
This subclass is indented under subclass 104. Discharge
devices having three or more secondarily emissive
electrodes.
Subclass:
106
This subclass is indented under the class definition.
Devices provided with means to prevent the emission of
secondary electrons from some part of the device.
(1) Note. Discharge devices which have one or more control
electrodes and in which the only means provided to suppress
the secondary emissive is that one or more of the control
electrodes may be used as a secondary emissive suppressing
electrode are not included in this or the indented subclass
but will be found in subclasses 293+, or one of the
subclasses specified in the notes thereto.
Subclass:
107
This subclass is indented under subclass 106. Devices in
which the secondary emission suppression is secured by the
use of a nonelectron emissive material.
(1) Note. In the devices in this subclass the part which is
to be nonemissive may be made of a nonemissive material or
coated with a nonemissive material.
(2) Note. See the class definition for the classification
of electrodes where no structure of the electrode is involved
other than composition of the materials used to form the
electrodes, coated electrodes which involve no more structure
than a base with one or more coatings thereon, and for the
processes of making or coating electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
353 for electrodes, per se, which are made of two or more
portions or which have a coating upon a portion of the
electrode, one portion of the electrode being a nondischarge
sustaining portion.
355 and the subclasses specified in the notes thereto for
coated electrodes.
SEE OR SEARCH CLASS:
252, Compositions, 500, and the subclasses specified in the
notes thereto for materials and compositions for discharge
device electrodes.
Subclass:
107.5
This subclass is indented under the class definition.
Discharge devices provided with means between the cathode and
anode to change the width of the electron stream between the
anode and the cathode.
(1) Note. Included in this subclass are discharge devices
of the so-called "magic eye" type which have an annular anode
coated with fluorescent material surrounding an emissive
central cathode and a control electrode for varying the width
of the discharge between the cathode and anode so that as the
potential of the control electrode varies the width of the
nonluminous portion of the anode varies.
SEE OR SEARCH THIS CLASS, SUBCLASS:
293 and the subclasses specified in the notes thereto, for
other discharge devices which have a control grid or other
apertured electrode interposed between the cathode and anode,
see especially indented subclass 299 where the discharge
device is provided with a plurality of control electrodes
with the apertures in the different electrodes in alignment
(e.g., beam power type tubes).
364 for cathode-ray tubes provided with means to focus the
electrons into a restricted beam and with means for
deflecting the beam over the surface of a target. See
especially indented subclasses 461+ where the target is a
fluorescent or phosphorescent screen.
483 for other discharge devices provided with fluorescent
material.
Subclass:
110
This subclass is indented under the class definition.
Devices which have an optical device structurally combined
with the device so that the optical device and the lamp or
discharge device constitutes a single integral device and
devices under the class definition which are provided with an
envelope which is designed to be especially transparent to
particular wave lengths of radiant energy.
(1) Note. Optical devices as defined in the subclass
definition include lenses, polarizers, reflectors, light
diffusers, light valves, light obscuring means or any other
means designed to alter the transmission of light rays in any
manner.
(2) Note. See the class definition for the classification
of lamps and discharge devices which are combined with a
separable casing, jacket, shield, or envelope protective
means. See the class definition for the classification of
lamps and discharge devices which are combined with a
separable optical device. See the class definition for the
classification of envelopes, per se, for lamps and discharge
devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
359.1 for discharge devices of the positive ion accelerator
type which are provided with windows through which the
positive lens may pass.
420 for cathode ray devices provided with electron permeable
windows.
461 for cathode-ray tubes provided with fluorescent or
phosphorescent screens or targets.
465 for cathode ray devices provided with light valves.
483 for devices having a fluorescent material as a part
thereof.
539 for photosensitive devices provided with means for
transmitting particular portions of the light spectrum to the
photosensitive element of the device.
SEE OR SEARCH CLASS:
359, Optics: Systems (Including Communication) and Elements,
642 for lenses.
362, Illumination, 351 for antiglare lens and subclasses
326+ for light refractors (e.g., lenses) for use with
illuminating devices where the refractor is separable from
the source of light.
378, X-Ray or Gamma Ray Systems or Devices, 121 for X-ray
tubes which are provided with screening means to eliminate
unwanted secondary X-rays.
Subclass:
111
This subclass is indented under subclass 110. Devices which
have structurally combined therewith a plurality of optical
devices of diverse types (e.g., a reflector and a lens or a
filter and a polarizer).
Subclass:
112
This subclass is indented under subclass 110. Devices in
which the optical device is a polarizer, a light filter, or
which are provided with an envelope which is designed to be
especially transparent to particular wave lengths of radiant
energy.
(1) Note. See the class definition for the classification
of envelopes including those made of special compositions for
electric lamps and discharge devices.
SEE OR SEARCH CLASS:
252, Compositions, 299.01 for liquid crystal containing
compositions useful in making optical filters and subclasses
582+ for other compositions useful in making optical
filters.
359, Optics: Systems (Including Communication) and Elements,
483 for light polarizers and subclasses 350+ and 885+ for
optical filters.
427, Coating Processes, for processes of coating, per se,
wherein the product is an optical element.
428, Stock Material or Miscellaneous Articles, subclass 415,
417 and 426+ for a nonstructural composite web or sheet
embodying a layer of glass.
501, Compositions: Ceramic, 11 for glass compositions
capable of filtering light.
Subclass:
113
This subclass is indented under subclass 110. Devices in
which the optical device is a light reflector.
SEE OR SEARCH CLASS:
359, Optics: Systems (Including Communication) and Elements,
838 for reflectors, per se.
362, Illumination, 341, and the subclasses specified in the
notes thereto for reflectors for use with light projectors
where the reflector is separable from the source of light.
427, Coating Processes, for processes of coating, per se,
wherein the product is an optical element.
Subclass:
114
This subclass is indented under subclass 113. Devices having
a plurality of reflectors.
Subclass:
115
This subclass is indented under subclass 113. Devices in
which the lamp is an incandescent lamp having a plurality of
filaments or glowers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
316 and the subclasses specified in the notes thereto for
other lamps which are provided with a plurality of filaments
or glowers.
Subclass:
116
This subclass is indented under subclass 110. Devices in
which the optical device is a light diffusing means.
(1) Note. Incandescent lamps with frosted globes are
included in this subclass.
SEE OR SEARCH CLASS:
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
663 for methods of etching glass to produce a light
diffusing surface thereon.
427, Coating Processes, for processes of coating, per se,
wherein the product is an optical element.
Subclass:
117
This subclass is indented under subclass 110. Devices in
which the optical device is a light valve, or a light shield
or other light obscuring means for preventing transmission of
light.
SEE OR SEARCH THIS CLASS, SUBCLASS:
364 for cathode ray devices provided with light valves.
SEE OR SEARCH CLASS:
359, Optics: Systems (Including Communication) and Elements,
227 and 238+ for light valves, per se.
Subclass:
118
This subclass is indented under the class definition.
Unitary devices known as spark plugs.
(1) Note. See the glossary for the class definition of
spark plugs. In general, the spark plugs classified herein
are the jump spark type found in the gasoline engine of an
automobile.
(2) Note. The shell is the part having means usually
threaded for attachment to the cylinder. The shell may be
made of more than one piece. Some plugs do not have a shell,
the insulating core being attached directly to the cylinder,
as by having screw threads thereon. The core is the
insulating means fastened to the shell and holding the center
electrode with respect to the shell. It may consist of
several parts which may or may not be cemented to each other.
The center electrode is the electrode or wire extending from
the exterior to the interior of the spark plug and which is
insulated from the shell by the core. There may be several
center electrodes insulated from each other. The spark
electrodes are the electrodes between which the jump spark is
formed. The ignition spark gap is the gap on the interior of
the spark plug designed to ignite the combustible fuel. A
spark gap is constituted by two or more spark electrodes.
The interior of the spark plug is the portion which will be
exposed to the combustible gas. The exterior is the part
usually exposed to atmosphere and which has the connector for
the ignition wire mounted thereon. Electrode chamber is the
space defined by the interior part of the core and the shell
and exposed to the combustible gas in the engine. It may be
substantially flat in some cases.
(3) Note. Spark plugs are collected here on the basis of
use, art and structure. Spark plugs having the usual
structure of a shell, an insulating core with one or more
electrodes therein are found here. Due to the rules of
classification, certain types of spark plugs and combinations
of spark plugs with accessories are classified in the lower
numbered subclasses of this class. Also, since the presence
or absence of claimed sparking electrodes determines the
classification in this class, a number of other classes
provide for bushings, connectors, shields, joints and other
subcombination features. Such other subclasses and classes
are referred to in the notes below, and in cases where only a
few patents are classified in other subclasses or classes and
which are not noted in the notes, cross-reference patents
have been placed in this and the indented subclasses.
(4) Note. Spark Intensifiers for Spark Plugs: Intensifier
spark gaps designed for use with spark plugs are not
classified in this or the indented subclasses unless the
intensifier gap is a unitary part of the complete spark plug
when see subclasses 123+. Where only the spark plug bushing
(i.e., shell, core, center wire) is claimed, no ignition
spark electrodes being claimed, the intensifier gap being
located in or on the bushing, the patent is likewise excluded
and classified as an intensifier gap. Some of the subclasses
to be searched for these intensifier gaps are: 1+, where
there are a plurality of intensifier gaps in a unitary
device; 51, where the intensifier is claimed in combination
with a detachable electric connector; 110+, where the
intensifier includes an optical element as a lens, mirror,
etc.; 146+, where the intensifier is provided with a movable
or adjustable electrode or shield (e.g., a screw threaded
electrode so that the size of the gap may be adjusted); 238+,
especially 243, 267, 268 where the supporting or spacing
structure for mounting the intensifier electrodes are
claimed; see subclass 267 where the electrodes are rods or
rod-like members, subclass 268 where the electrodes are held
apart by an insulating member between the electrodes, and
subclass 243 for the other type; 324, for the intensifiers
with a casing including those having a transparent window;
and 567, especially 620+, 622, 634+ where the intensifier is
mounted in a sealed envelope containing gas or vapor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for unitary devices providing two or more separate spark
plug gaps or providing a spark plug gap and another discharge
device, but excluding spark plugs with intensifier gaps for
which see subclasses 123+ and spark plugs with a plurality of
series spark gaps for which see subclass 123.
10 for spark plugs combined with a temperature indicator.
11.5 for spark plugs with temperature modifying means.
51 for spark plugs claimed in combination with a detachable
electric connector (e.g., the connector on the lead-in
wire).
54 for spark plugs which include a radioactive material.
110 for spark plug devices which include means, see subclass
110 where the plug includes a lens, subclass 113 where the
plug is combined with a mirror, subclass 116 where the plug
includes a prism or light diffusing means.
513 where the plug includes indicia or a scale (e.g., to
show width between the ignition electrodes).
SEE OR SEARCH CLASS:
15, Brushing, Scrubbing, and General Cleaning, subclass
104.011 for spark plug cleaners.
73, Measuring and Testing, 118.1 for spark plug testing
devices. Also see Class 324, subclasses 378+ for spark plug
testers.
123, Internal-Combustion Engines, 143, especially subclasses
169 and 594+ for this subject matter in combination with an
internal combustion engine or engine accessory. Subclass 169
relates, for example, to the combination of a spark plug and
a cylinder head; the combination of a plug and cylinder space
in which the interior of the skirt has a special claimed
relationship to the cylinder volume the combination of a
spark plug with an adaptor of the screw coupling type (which,
for example, permits a small plug to be inserted in a large
hole or which acts to extend the shell skirt to provide a
chamber for the spark), etc.. Also search Class 123 for
plural separate spark plugs such as, for example, a plurality
of adjustable spark plugs having means to adjust them.
138, Pipes and Tubular Conduits, 37 for fittings or adapters
to be interposed between the spark plug and the cylinder
which include a flow regulator or baffle.
174, Electricity: Conductors and Insulators, appropriate
subclasses for spark plug type electrical bushings (i.e., a
spark plug with no sparking electrodes claimed), and
electrical shields for spark plugs. See 15.1 for such
bushings combined with means for feeding, circulating or
distributing a fluid, such as a cooling liquid or air,
subclass 31 for such bushings with a fluid (air) vent, valve
or other fluid feeding means combined therewith (e.g., a
priming means), subclass 35 for such bushings with an
electrical shield about it and for the spark plug shields,
per se, and subclasses 152+ for such bushings, per se,
including such bushings as are provided with thermal
modifying means (e.g., heat radiating fins or heat conductive
members) and electrical connectors. Note that Class 174
provides for subcombinations of spark plug type bushings
which are less than a complete bushing and more than is
provided for in other subcombination classes (e.g., the
combination of the insulator and center electrode which
involves more structure than a mere joint would be in Class
174 rather than one of the classes providing for joints.
285, Pipe Joints or Couplings, appropriate subclasses for
fittings or adapters having joint means to attach one end of
the fitting to the engine and joint means at the other end to
receive a spark plug.
315, Electric Lamp and Discharge Devices: Systems, 32 for
space discharge devices, such as spark plugs, having integral
therewith a circuit element such as a resistor, condenser or
switch. Note particularly indented subclass 46 for spark
plugs having a resistor in shunt to the sparking electrodes
which is adapted to flash-over when traversed by a high
current impulse, said flash-over serving to ignite the
combustion charge; indented subclasses 51+ for spark plugs
having a plurality of circuit elements, such as a resistor
and a condenser; subclass 56 for spark plugs having an
integral switch; subclass 57 for spark plugs having an
integral transformer, and subclass 58 for spark plugs having
a suppressor resistor. Note that spark plugs having only an
integral intensifier (i.e., series connected gap) are
classified in subclasses 123+ of Class 313. The presence of
a separable connector or merely conductive lead (e.g.,
ignition cable) will not prevent classification in Class 315,
subclasses 32+ if the device is otherwise classifiable there.
Class 315 also provides for systems for supplying electrical
energy to spark gaps. Note especially subclasses 209+ for
such systems having a periodic switch (e.g., a timer switch)
in the circuit and subclasses 211+ where there are a
plurality of spark plugs and the system includes a
distributor type switch.
361, Electricity: Electrical Systems and Devices, 247 for
miscellaneous ignitors and ignitor systems.
403, Joints and Connections, appropriate subclasses for a
joint between metal and glass or ceramic members.
439, Electrical Connectors, appropriate subclasses for an
electrical connector or certain connector related
accessories. Note that Class 439 includes the combination of
an electrical connector with a named spark plug. Search
especially 125 for an electrical connector having a spark or
glow plug cover. Also, search subclasses 191+ for the
combination of an electrical connector with a fluent material
transmission line. Search subclasses 271+ for an electrical
connector with a packing or gasket to seal the joint with a
mating connector; subclasses 312+ for a coupling part with
coupling part movement-actuating means or retaining means in
addition to a contact thereof with relatively pivotable
concentric movement-actuating or retaining ring. Search
Class 439, subclasses 607+ for a connector with a radiation
shielding means; and subclasses 625+ for a connector with
insulation other than a conductor sheath.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, subclass 7 for methods of manufacturing spark
plugs.
501, Compositions: Ceramic, appropriate subclasses for
ceramic compositions used for spark plug insulators. Note
especially 127 and 134+ for clay containing compositions;
and subclasses 141+ for titanate and similar material
containing compositions.
Subclass:
119
This subclass is indented under subclass 118. Subject matter
having means, integral with the spark plug, permitting the
removal of a part of the spark plug from normal operating
position with respect to the portion of the shell which is
attachable to the cylinder, without forming an open
passageway from the cylinder to the atmosphere.
(1) Note. Included in this subclass are only unitary spark
plugs. See Class 123, Internal-Combustion Engines,
subclasses 143+, especially 169 for similar subject matter
where the plug is combined with another separable device (as
a fitting with a valve) which permits removing of the plug
without stopping the engine.
(2) Note. These spark plugs are designed usually to permit
inspection or repair of the ignition spark gap electrodes or
of the interior end of the insulator without stopping the
operation of the engine.
SEE OR SEARCH THIS CLASS, SUBCLASS:
236 for other discharge devices which have a stand-by or
spare electrode.
237 for other discharge devices which have electrode
replacement means or are demountable.
SEE OR SEARCH CLASS:
137, Fluid Handling, appropriate subclasses for automatically
operated valves.
251, Valves and Valve Actuation, appropriate subclasses for
manually operated valves.
Subclass:
120
This subclass is indented under subclass 118. Subject matter
provided with a passageway for a fluid extending through the
spark plug structure from the interior of the spark plug to
the exterior or to a fluid feed line so that a liquid or gas
may flow between the electrode chamber and the exterior of
the spark plug or the fluid feed line.
(1) Note. The passageway may be provided with a valve so
that the fluid may pass in one direction only or have a valve
so that the fluid feed line may be closed or opened as
desired.
(2) Note. The fluid feed or air vent, for example, may
supply priming fluid to the ignition spark gap space, or may
blow oil off the electrodes or allow some of the burned gas
to escape. Included in this subclass are spark plugs in
combination with integral fuel injection nozzles.
(3) Note. The fluid feed or air vent may, for example, act
as an observation port for visual inspection of the ignition
spark gap or as a port for the insertion of a cleaner.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11.5 for this subject matter when the fluid passageway is
for the purpose of supplying a cooling fluid (e.g., air) to
the spark plug.
119 for spark plugs having valve means arranged so that the
interior of the plug or part of the shell may be sealed off
to permit removal or inspection of at least part of the plug
without stopping the engine.
143 for spark plugs having gas directing means, such as
baffles or valves in the electrode chamber where there is no
fluent passageway between the interior and the exterior of
the plug.
231.01 for other discharge devices which have a fluent
material supply means or flow directing means.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, 179.9 for priming devices
for internal combustion engines.
137, Fluid Handling, 455 for automatically operated valves
responsive to the fluid passing through the valve, see
especially subclasses 511+ for automatically operated check
valves.
239, Fluid Sprinkling, Spraying, and Diffusing, appropriate
subclasses, for fuel injection nozzles for internal
combustion engines, especially subclasses 86-96, and 584+.
See also (2) Note, above.
251, Valves and Valve Actuation, appropriate subclasses for
manually operated valves.
Subclass:
121
This subclass is indented under subclass 118. Subject matter
in which the whole or a portion thereof is reversible.
(1) Note. This subclass relates, for example, to spark
plugs in which the core can be reversed, so that the center
electrode tip becomes the binding post and vice versa.
SEE OR SEARCH THIS CLASS, SUBCLASS:
144 for spark plugs having specific joint structure such as
between the insulator and the shell.
236 for other discharge devices which are provided with a
stand-by or spare electrode.
Subclass:
122
This subclass is indented under subclass 118. Subject matter
in which one of the ignition spark electrodes is supported by
the shell, and is mounted so as to be removable therefrom.
(1) Note. The removable electrode supported by the shell
may be attached to a sleeve or other supporting means
fastened between the shell and core so that the core must be
removed to remove the electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
128 for spark plugs wherein the core supports a plurality of
separate ignition electrodes with individual lead-in wires
which are insulated from each other.
Subclass:
123
This subclass is indented under subclass 118. Subject matter
having a plurality of spark gaps connected in series.
(1) Note. The plural gaps may be located on the interior
portion of the plug (e.g., used to ignite the combustible
gas) or one or more of the gaps may be located in or on some
other portion of the spark plug.
(2) Note. Spark gaps in series with the igniter spark gap,
when not exposed to the cylinder charge, are often referred
to as intensifier gaps, since they prevent voltage break-down
until a voltage level, higher than would otherwise be
required, is reached.
SEE OR SEARCH THIS CLASS, SUBCLASS:
306 and the subclasses specified in the notes thereto for
miscellaneous discharge devices having a plurality of gaps in
series.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 180 for
systems for supplying electrical energy to a plurality of
different type spark gaps, subclasses 185+ for systems for
supplying electrical energy to a plurality of series
connected spark gaps, subclass 334 and the subclasses
specified in the notes thereto, for supplying electrical
energy to a discharge device having three or more series
arranged electrodes.
Subclass:
124
This subclass is indented under subclass 123. Subject matter
in which one of the series gaps is located in the lead-in
path which includes the center electrode connector for the
ignition wire and the ignition spark electrode conductively
attached to or formed by the center electrode, the gap being
located outside of the interior portion of the spark plug
(e.g., not in the electrode chamber).
(1) Note. Where all of the series gaps are exposed to the
cylinder charge so as to form ignition spark gaps, or where
the intensifier is located, not in the center electrode but
rather in a noncenter electrode return circuit or lead-in,
the art will be found in subclass 123 above.
(2) Note. The center electrode may be formed of plural
parts with the spaced electrode parts forming the intensifier
gap, or the center electrode may be spaced from the connector
for the ignition wire so as to form an intensifier gap with a
portion of the connector structure, or it may be otherwise
arranged so as to be in the center electrode lead-in path.
(3) Note. Spark Intensifiers for Spark Plugs: Intensifier
spark gaps designed for use with spark plugs are not
classified in this or the indented subclasses unless the
intensifier gap is a unitary part of the complete spark plug,
when see subclasses 123+. Where only the spark plug bushing
(i.e., shell, core, center wire) is claimed, no ignition
spark electrodes being claimed, the intensifier gap being
located in or on the bushing, the patent is likewise excluded
and classified as an intensifier gap. See Search This Class,
Subclass, below, for some of the subclasses to be searched
for these intensifier gaps are:
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 where there are a plurality of intensifier gaps in a
unitary device.
51 where the intensifier is claimed in combination with a
detachable electric connector.
110 where the intensifier includes an optical element as a
lens, mirror, etc..
146 where the intensifier is provided with a movable or
adjustable electrode or shield (e.g., a screw threaded
electrode so that the size of the gap may be adjusted).
267 where the electrodes are rods or rod-like members.
268 where the electrodes are held apart by an insulating
member between the electrodes, and subclass 243 for the other
type.
282 especially 243, 267, 268 where the supporting or spacing
structure for mounting the intensifier electrodes are
claimed. See subclass
324 for the intensifiers with a casing including those
having a transparent window.
567 especially 620+, 622, 634+ where the intensifier is
mounted in a sealed envelope containing gas or vapor.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 58 for
similar subject matter having a circuit impedance such as,
for example, a nonlinear resistor in the center electrode
lead-in.
Subclass:
125
This subclass is indented under subclass 118. Subject matter
having an ignition spark electrode which is movable into two
different positions.
(1) Note. For the purpose of this definition, an electrode
which is variably positioned by plastic distortion thereof
(as, for example, when points are "set" to a desired position
by bending to provide a particular gap length) is not
considered to be movable. Where the distortion is an elastic
deformation as, for example, due to vibration, the art is in
this and the indented subclass.
(2) Note. In general, this subclass includes spark plugs
provided with means whereby an electrode may be moved other
than by plastic distortion without disassembly of the spark
plug. The electrode may be moved for cleaning or for
obtaining a variable width ignition gap.
SEE OR SEARCH THIS CLASS, SUBCLASS:
119 for this subject matter where the spark plug can be
removed from normal operating position without stopping the
engine.
120 for spark plugs having a reversible electrode which can
assume one position or a reversed position.
122 for spark plugs having a removable electrode on the
shell.
127 for spark plugs having stationary electrodes and a
movable cleaner.
143 for spark plugs having a movable baffle or gas directing
means for the electrode chamber.
146 for other space discharge devices having a movable
electrode.
Subclass:
126
This subclass is indented under subclass 125. Subject matter
in which the electrode is automatically moved.
(1) Note. The electrode may be moved, for example, by
engine vibration or by a thermostat. The motion may be
effected so as, for example, to adjust the spacing of the
spark gap electrodes or to clean the electrodes.
(2) Note. This subclass also includes spark plugs having
means for automatically moving electrodes and means for
disabling said first mentioned means so that the electrodes
can optionally be held immovable.
(3) Note. This subclass includes spark plugs having both
manual and automatic means to move an electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
127 for spark plugs having automatically moved cleaners.
143 for spark plugs having automatically moved baffles or
gas directing means for the electrode chamber.
Subclass:
127
This subclass is indented under subclass 118. Subject matter
having a cleaner.
(1) Note. The cleaner may, for example, be a movable
scraper which scrapes the electrode tips or movable balls
which knock carbon off the insulator.
(2) Note. Many spark plugs are "self cleaning" by virtue of
their operating at a sufficiently high temperature to burn
off carbon deposits. Such spark plugs are not classified in
this subclass unless they have means for cleaning in addition
to the means which produce the high temperature operation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
120 for spark plugs having fluid feed or vent means, through
which means a cleaner may be inserted to clean the electrodes
or other parts.
125 for this subject matter in which an electrode is movable
as, for example, where an electrode can be rubbed against
another electrode or where an electrode vibrates during use
to shake off deposits or where a movable scraper is an
electrode tip.
SEE OR SEARCH CLASS:
15, Brushing, Scrubbing, and General Cleaning, subclass
104.011 for spark plug cleaners, per se.
Subclass:
128
This subclass is indented under subclass 118. Subject matter
having plural ignition spark electrodes which are insulated
from the shell, and from each other, each of the so insulated
electrodes having its own lead-in structure.
(1) Note. The spark plug may have three or more ignition
spark electrodes, one of which is mounted on the shell, at
least two of the others being insulated from the shell and
having individual lead-in conductors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
123 for spark plugs having plural series connected ignition
gaps.
140 for spark plugs having a plurality of parallel connected
gaps, e.g., having a plurality of ignition spark electrodes
connected together which cooperate with the electrode mounted
on the shell to form a plurality of parallel connected
ignition gaps.
306 and the subclasses specified in the notes thereto for
other discharge devices having three or more electrodes.
SEE OR SEARCH CLASS:
439, Electrical Connectors, 626 and 709+ for electrical
connector structure having a plurality of terminals which are
insulated from each other mounted upon an insulating member.
Subclass:
129
This subclass is indented under subclass 118. Subject matter
having a transparent part.
(1) Note. The transparent part may, for example, make the
spark or explosion inside the engine cylinder visible to an
observer.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for spark plugs where the transparent part is an optical
device such as, for example, a lens. See subclass 116 where
the transparent part has light diffusing properties.
120 for spark plugs having fluid feed or air vent means,
through which the spark gap may be observed.
124 for spark plugs having an intensifier gap and the
portion of the plug having the intensifier gap is provided
with an observation window or is made transparent.
324 for miscellaneous spark gaps which are provided with a
casing having a transparent part.
Subclass:
130
This subclass is indented under subclass 118. Subject matter
having nonconducting material interposed between or closely
adjacent the ignition spark gap.
(1) Note. The nonconducting material, for example, may be
provided with a minute aperture through which the spark must
pass, or it may be an impervious barrier between the
electrodes.
(2) Note. For the purpose of this definition, the material
is closely adjacent the spark gap if it is so close that it
affects the sparking.
SEE OR SEARCH THIS CLASS, SUBCLASS:
143 for spark plugs having an insulator end at the ignition
spark gap end of the plug of particular shape.
325 for miscellaneous spark gaps having an insulator
material within or closely adjacent to the spark electrodes.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
46 for similar subject matter where the material with or
closely adjacent the gap is a resistance material.
Subclass:
131
This subclass is indented under subclass 130. Subject matter
in which the material is so situated that the spark is caused
to follow the surface of the insulator or to follow a path
which is not the shortest path between electrodes.
(1) Note. For example, the insulating material may form a
barrier between the sparking electrodes so that the spark
must jump the barrier.
Subclass:
132
This subclass is indented under subclass 118. Subject matter
having a groove or analogous surface structure or having a
narrow space which is disclosed as drawing or holding fluid
by capillary action.
(1) Note. The fluid, for example, may be condensed oil mist
which is drawn away from the electrode points by capillary
action.
(2) Note. The narrow space may be formed, for example,
between two facing flat electrodes of extended area
positioned closely together.
SEE OR SEARCH THIS CLASS, SUBCLASS:
141 and the subclasses specified in the notes thereto, for
spark plug ignition electrode structure, not having capillary
grooves, in which condensed fluid is drawn away from
electrode points by gravity action due to the inclination of
a surface of the electrode.
Subclass:
133
This subclass is indented under subclass 118. Subject matter
having an ignition electrode whose shape is that of a ball or
a substantial portion of a ball.
(1) Note. This subclass relates, for example, to spark
plugs in which one electrode is a substantially hemispherical
or hemispheroidal surface formed of a thin sheet material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
325 and the subclasses specified in the notes thereto for
other discharge devices having ball electrodes, and subclass
326 for the electrodes, per se.
Subclass:
134
This subclass is indented under subclass 118. Subject matter
having electrical shielding means to shield the spark plug.
(1) Note. The shielding means ordinarily are used to
prevent the ignition current used with the spark plug from
radiating or otherwise establishing unwanted electrical
effects.
SEE OR SEARCH THIS CLASS, SUBCLASS:
313 for other space discharge devices having electric
shielding means.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, 146.5 for shielded
ignition systems for internal combustion engines.
174, Electricity: Conductors and Insulators, 32 for
electrical conductors having shielding means and see subclass
35 for the miscellaneous electrical shielding structure
including that designed for use with spark plugs, or spark
plug type bushings.
315, Electric Lamp and Discharge Devices: Systems, subclass
85 for miscellaneous space discharge device systems
including some spark ignition systems having shielding means
and consult the search notes of subclass 85 for a list of
related art.
439, Electrical Connectors, 125 for an electrical connector
with a spark or glow plug cover; and subclasses 607+ for an
electrical connector having or providing an inductive or
capacitive shield.
Subclass:
135
This subclass is indented under subclass 118. Subject matter
having significant connector structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
51 for spark plugs having a detachable connector such as,
for example, a spark plug with a connector part attached
thereto in combination with the connector part attached to
the ignition wire and designed to be attached to the spark
plug connector.
134 for this subject matter wherein the spark plug includes
electrical shielding means.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 152
for spark plug type bushings (i.e., having no ignition
sparking points claimed) in combination with an electrical
connector when more bushing structure is recited than is
necessary for mounting or supporting the connector.
439, Electrical Connectors, appropriate subclasses for an
electrical connector and for certain accessories. Class 439
provides for an electrical connector combined with a "named"
spark plug, (i.e., no more of the spark plug is claimed than
is necessary to support or attach the connector to the spark
plug). Search 125 for a spark plug connector with a cover,
or for a spark plug cover, per se; subclasses 191+ for an
electrical connector combined with a fluid line conduit
(e.g., air vent or priming means); subclasses 271+ for an
electrical connector with a packing or gasket to seal the
joint between the connector and a mating connector;
subclasses 312+ for an electrical connector with a coupling
movement-actuating relatively pivotable concentric ring in
addition to the contacts thereof; subclasses 607+ for an
electrical connector with a radiation shielding means; and
appropriate other subclasses for an electrical connector
generally which may be used on a spark plug.
Subclass:
136
This subclass is indented under subclass 118. Subject matter
in which the portion of the center electrode which is encased
by the insulating core structure consists of more than one
part.
(1) Note. For the purpose of classification in this
subclass, necessary terminal structure immediately adjacent
the end of the insulator shall not be considered to be one of
the aforementioned parts, nor shall a coated or covered wire
(as, for example, in the cored rod) be considered to be
plural parts for classification in this subclass.
(2) Note. The parts may be physically united as by welding
a rod of one metal to a rod of another metal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
124 for this subject matter where the plural parts are
separated so as to form an intensifier gap.
Subclass:
137
This subclass is indented under subclass 118. Subject matter
having the insulating core formed of a plurality of parts.
(1) Note. For the purpose of classification in this
subclass, stacked parallel laminations of mica will not be
considered to be plural members, but mica members whose
planes are not parallel (as, for example, a rolled mica tube
surrounded by flat mica washers) are considered to be plural
members. A thin cement layer which is utilized to adhere
together parts of the spark plug or to make joints gas tight
is not considered to be an insulating member even though it
may, in fact, be an insulator.
(2) Note. The different parts of the core may be cemented
together or may be held together by mechanical means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
130 for spark plugs having an insulating member in or
closely adjacent to the spark gap.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 152 for
insulated bushings, including spark plug type bushings (i.e.,
not having claimed ignition spark electrodes).
Subclass:
138
This subclass is indented under subclass 118. Subject matter
having plural ignition electrodes each of which is a pure
figure of revolution about the longitudinal axis of the
plug.
(1) Note. Where an electrode is only in part a figure of
revolution, such as being a disk and in part not a figure of
revolution, such as having a supporting spur, a perforated
supporting means or a perforation, classification is not in
this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
133 for this subject matter where one of the electrodes is
ball shaped.
139 and 140, for similar subject matter in which one of the
electrodes is not a pure figure of revolution. See subclass
139 where one of the electrodes is a disk or ring and the
other electrode is not a pure figure of revolution, or where
one electrode is only a section of a disk or ring and
subclass 140 where one of the electrodes has a multi-pointed
or serrated edge.
Subclass:
139
This subclass is indented under subclass 118. Subject matter
having an ignition electrode whose shape is that of a ring or
disk or a sector of a ring or disk.
SEE OR SEARCH THIS CLASS, SUBCLASS:
133 for this subject matter having a ball shaped electrode.
138 for this subject matter having plural ignition
electrodes each of which are pure figures of revolution about
the longitudinal axis of the plug, one of the electrodes
being a ring or disk.
Subclass:
140
This subclass is indented under subclass 118. Subject matter
having means to define plural distinct ignition spark gap
spaces which are electrically connected in parallel.
(1) Note. This subclass includes, for example, spark plugs
having a plurality of separate center electrodes which are
connected in parallel and which all cooperate with one or
more other electrodes to define parallel gaps, spark gaps
having a multipointed electrode cooperating with another
electrode so that each point of the electrode defines a
sparking electrode with the other electrode, and spark plugs
having a plurality of shell electrodes which cooperate with
the same center electrode.
(2) Note. Some of the spark plugs in this subclass are
intended to make the plug efficient over a longer period of
time by having the spark shift to another electrode or place
on the electrode as the spark gap space widens due to the
"pitting" or wearing action of the spark.
(3) Note. This subclass does not include spark plugs having
two electrodes formed of smooth wires or rods which are
mounted in parallel or convergent relation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
123 for spark plugs having plural ignition spark gaps which
are electrically connected in series.
236 for space discharge devices having a stand-by or spare
electrode.
306 for other space discharge devices having three or more
distinct electrodes.
309 for other space discharge devices having a multipointed
or serrated edge electrode, and subclass 351 for the
electrodes, per se.
Subclass:
141
This subclass is indented under subclass 118. Subject matter
having significant ignition electrode structure,
interelectrode spacing, or inter-electrode spatial
relationship, or having an ignition electrode formed of
particular material.
(1) Note. An electrode for a spark plug defined only by the
composition of which it is made is not classified herein.
Such electrodes are classified elsewhere. See the Search
Class notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
122 for this subject matter where the shell electrode is
readily removable or demountable.
123 for this subject matter having plural series gaps.
132 for this subject matter where an electrode has a
capillary groove.
133 for this subject matter where an electrode is ball
shaped.
138 for this subject matter where both electrodes are pure
figures of revolution about the plug axis.
139 for this subject matter where the electrode is shaped
like a ring or disk or sector of a ring or disk.
140 for this subject matter having plural distinct parallel
gaps, such as, for example, those formed between a serrated
and a smooth electrode.
311 for space discharge devices having electrodes made of
particular materials.
326 for miscellaneous discharge device electrode structure.
SEE OR SEARCH CLASS:
75, Specialized Metallurgical Processes, Compositions for Use
Therein, Consolidated Metal Powder Compositions, and Loose
Metal Particulate, if made of a pure metal, or an alloy. 228
provides for sintered or consolidated metal powder stock
material.
148, provides for such electrodes defined solely by their
metal or alloy composition and which are distinguished by
their internal structure or characteristics of the metal or
metal alloy (e.g., produced by a Class 148 treatment).
428, Stock Material or Miscellaneous Articles, 544 provides
for electrode materials which as defined are only metal wire
or other metallic stock material.
Subclass:
142
This subclass is indented under subclass 141. Subject matter
in which the spatial relation and construction of the
ignition electrodes is such that the spark gap between them
coincides with the longitudinal axis of the plug.
(1) Note. Electrodes of extended area will be considered,
for the purpose of classification in this subclass, to have
the spark gap on the axis of the plug if the sparking faces
of the electrodes are symmetric about the axis and the
spacing gap between the electrodes coincides substantially
with the axis of the plug. This note is applicable where the
electrodes are plane sheets of material spaced along the
longitudinal axis of the plug.
Subclass:
143
This subclass is indented under subclass 118. Subject matter
having means to provide an electrode chamber of significant
shape, or having an insulator whose exposed cylinder end has
a significant shape, or having a shell skirt of particular
shape, or having a baffle or gas directing means.
(1) Note. The insulator end, for example, may be ridged so
as to provide a longer leakage current path. The baffle, for
example, may prevent oil vapor from reaching the insulator,
or it may cause gas currents to concentrate in the vicinity
of the electrode points.
(2) Note. The baffle may or may not be movable.
(3) Note. Spark plugs in combination with separable
adapters are not included herein. See Class 123,
Internal-Combustion Engines, subclass 169 for this
combination. Adapters which are no more than a pipe fitting
with means to attach the plug at one end and the fitting to
the plug at the other end and which include joint structure
will be found in the appropriate subclasses of Class 285,
Pipe Joints or Couplings. Fittings or adapters which include
flow regulator or baffle structure are classified in Class
138, Pipes and Tubular Conduits, subclasses 37+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
127 for spark plugs having a movable cleaner, such as, for
example, a movable scraper within the electrode chamber.
Subclass:
144
This subclass is indented under subclass 118. Subject matter
having significant joint structure.
(1) Note. Where there is a significant joint between the
center electrode and core in addition to a joint between
other parts, such as the shell and core, subclass 145 must
also be searched.
SEE OR SEARCH THIS CLASS, SUBCLASS:
119 for spark plugs which are provided with a joint
involving structure so that a part of the plug may be removed
from operating position without stopping the engine (e.g.,
the insulator may be removed from the shell and means are
provided to seal off the opening in the shell).
121 where the spark plug is provided with joint structure so
that some part (e.g., the insulator) may be removed and
replaced in the reverse position.
137 for the subject matter when the insulating core is
formed of a plurality of parts.
238 especially subclasses 243, 267 and 268 for other space
discharge devices with supporting and spacing structures
which involve joints between the parts.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, subclass 169 for spark
plugs in combination with an internal combustion engine or
engine accessory. Included in Class 123 are joints between
the spark plug and the cylinder where significant cylinder
structure is recited. Also, included in Class 123 is the
combination of a spark plug with an adapter designed to hold
the plug at one end and designed to be attached to the
cylinder at the other end (e.g., to use a small sized plug in
a larger sized cylinder opening).
174, Electricity: Conductors and Insulators, subclass 138
for miscellaneous insulated rod joints and subclass 152 for
spark plug type electrical bushings (i.e., a spark plug with
no ignition sparking electrodes claimed) having joint
structure between the parts of the bushing.
285, Pipe Joints or Couplings, appropriate subclasses for
mere pipe joints including insulated pipe joints.
403, Joints and Connections, appropriate subclasses for rod
joints of general application. Note that insulated rod
joints are in Class 174, subclass 138, or one of the classes
specified in the notes thereto.
439, Electrical Connectors, 625 for an electrical connector
mounted on or attached to an electrical insulator.
501, Compositions: Ceramic, appropriate subclasses for
ceramic compositions or the electric insulating type, such as
cements for joints, and for electric insulators defined
merely by their composition, especially 127 and 134+ for
clay containing compositions; and subclasses 141+ for
titanate and similar material containing compositions.
Subclass:
145
This subclass is indented under subclass 144. Subject matter
in which the said joint is between the center electrode and
the insulating core.
(1) Note. This subclass includes spark plugs having a
significant joint between the center electrode and the
insulating core or significant joint structure between the
shell and core in addition to the significant joint between
the center electrode and core. Where the only significant
joint is between the insulator and the shell, see the Search
This Class, Subclass notes below.
(2) Note. to subclass
SEE OR SEARCH THIS CLASS, SUBCLASS:
120 where the joint structure includes a fluid valve.
124 where there is an intensifier in the center electrode.
128 where there is a plurality of insulated center
electrodes.
136 where the center electrode is made of a plurality of
parts.
144 where the only significant joint is between the
insulator and the shell, and see the search notes for other
classes providing for closely related subject matter.
Subclass:
146
This subclass is indented under the class definition.
Devices having at least one electrode or shield which is
movable relative to another electrode or shield or to some
other part of the device.
(1) Note. This subclass includes devices where the
electrode or shield is designed to be moved during the
operation of the device and also includes devices where the
electrode or shield is mounted so as to be moved for
adjustment and need not be moved during the operation of the
device. For example, included in this and the indented
subclasses are spark gaps having one of the electrodes
mounted by means of screw threads so that the electrodes can
be moved closer or further apart.
SEE OR SEARCH THIS CLASS, SUBCLASS:
125 where the device is a spark plug.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, subclass 29, 39+, and 94 for
electrical precipitators which have movable electrodes.
191, Electricity: Transmission to Vehicles, appropriate
subclasses for means for transmitting electricity from a
fixed point or contact to an object which is movable.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, appropriate subclasses for arc lamps and similar
discharge devices of the consumable electrode type having an
electrode which is movable in order to feed it towards
another electrode to maintain the proper length discharge
space as the electrode is consumed by the discharge.
315, Electric Lamp and Discharge Devices: Systems, 327 for
systems for supplying electrical energy to discharge devices
which are designed to be started by placing the electrodes
into contact with each other and then separating the
electrodes from each other (e.g., which have a movable
electrode), and subclass 357 for electric systems for
supplying electrical energy to other discharge devices of the
gas or vapor type which have a movable electrode.
378, X-Ray or Gamma Ray Systems or Devices, subclass 135,
where the device is an X-ray tube.
Subclass:
147
This subclass is indented under subclass 146. Devices having
a plurality of movable electrodes or shields.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 51, for discharge devices of the consumable
electrode type (e.g., arc lamps) which have a plurality of
movable electrodes.
Subclass:
148
This subclass is indented under subclass 146. Devices which
are provided with an envelope and which have a portion of the
envelope wall movable, the means for moving the electrode or
shield being connected to the movable envelope wall.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 17.8 for
miscellaneous structures for transmitting mechanical motion
through a wall by means including an imperforate movable
envelope wall portion.
403, Joints and Connections, 230 for joints between a
rod-like body transverse to a plate-like body.
Subclass:
149
This subclass is indented under subclass 146. Devices in
which the movable electrode or shield is mounted so as to
rotate.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 42 for discharge devices of the consumable
electrode type (e.g., arc lamps), which are provided with
rotary electrodes.
378, X-Ray or Gamma Ray Systems or Devices, subclass 135, for
this subject matter where the device is an X-ray generator.
Subclass:
150
This subclass is indented under subclass 146. Devices having
a movable liquid electrode.
(1) Note. Since all devices having liquid electrodes may
have the electrode moved by tilting the device so as to cause
the electrode to flow, this subclass includes only those
devices which are provided with a liquid electrode which may
be moved by means other than the mere tilting of the device.
Some of the devices in this subclass have means for changing
the level of a liquid electrode and some are provided with
means for producing a jet or fountain of liquid from the
region of the liquid electrode for starting a discharge, but
the subclass is not limited to such types.
SEE OR SEARCH THIS CLASS, SUBCLASS:
163 for other discharge devices under the class definition
which are provided with liquid electrodes.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 327 for
systems for supplying electrical energy to discharge devices
which have a liquid electrode and which are provided with
means for moving the liquid electrode into contact with
another electrode to start the device into operation, see
subclasses 328+ where the device is designed to be started by
tilting the discharge device so as to bring the liquid
electrode into contact with another electrode.
362, Illumination, 263 for liquid electrode type lamps
(e.g., mercury vapor lamps) in combination with a separable
support for the lamp.
Subclass:
151
This subclass is indented under subclass 146. Devices having
thermally operable means for moving the electrode or shield.
SEE OR SEARCH THIS CLASS, SUBCLASS:
146 for movable electrode discharge devices in which an
electrode is moved by the blast of gas or fluid which results
from vaporization or thermal expansion of the gas or fluid
due to the presence of a space discharge. Such thermal
vaporization or expansion is not deemed to be "thermally
actuated" for subclass 151.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 89 for discharge devices of the consumable
electrode type (e.g., arc lamps) which are provided with a
thermostatic means for moving the electrodes.
315, Electric Lamp and Discharge Devices: Systems, subclass
39.59 for discharge devices having an electrode formed so as
to provide a structure having distributed inductance and
capacitance and operable in a magnetic field (e.g.,
magnetrons), the device having thermally actuated means for
varying the tuning of the reactive structure, subclasses
331+, for systems for supplying electrical energy to
discharge devices of the gas or vapor type including those
which are provided with a liquid electrode where the
discharge device is provided with an auxiliary starting
electrode which is moved into contact with and then separated
from one of the principal electrodes by thermostatic means to
start the discharge device.
Subclass:
152
This subclass is indented under subclass 146. Devices having
a magnetic means for moving the electrode or shield.
(1) Note. The magnetic means may be an electromagnet
connected in circuit with an electrode. A mere conductive
connection is not sufficient circuit to exclude the
organization from Class 313.
SEE OR SEARCH THIS CLASS, SUBCLASS:
153 and the subclasses specified in the notes thereto for
other devices under the class definition which are provided
with a magnetic device.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, for consumable electrode type arc lamps and other
consumable electrode type discharge devices having magnetic
means for feeding one of the electrodes towards the other
electrode as it or they are consumed in the discharge or for
separating the electrodes from each other to start the space
discharge. See especially 66, 69+, 78, 105+, and 113+; not
that subclasses 69+, provides for rotary electric motors
while the other subclasses mentioned provide for
electromagnets.
315, Electric Lamp and Discharge Devices: Systems, subclass
39.59 for discharge devices having an electrode formed so as
to provide a structure having distributed inductance and
capacitance and operable in a magnetic field (e.g.,
magnetrons), the device being provided with magnetically
actuated means for varying the impedance of the distributed
impedance structure, subclasses 331+ for systems for
supplying electrical energy to discharge devices of the gas
or vapor type including those which are provided with a
liquid electrode where the discharge device is provided with
an auxiliary starting electrode which is moved into contact
with and then separated from one of the principal electrodes
by magnetic means to start the discharge device.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 220 for electromagnets with armatures.
Subclass:
153
This subclass is indented under the class definition.
Subject matter where the lamp or discharge device has a
magnetic device associated therewith.
(1) Note. Many of the devices in this and the indented
subclasses are discharge devices in which the magnetic field
is designed to influence the space discharge but these
subclasses are not limited to such devices.
(2) Note. This and the indented subclass includes devices
in which an electrode generates the magnetic field, such as
having an electrode made in coil form to generate the
magnetic field.
(3) Note. Where the lamp or discharge device is provided
with an envelope, the magnetic field generating means may be
within or without the envelope.
(4) Note. See the class definition for the classification of
deflection and focusing magnets.
(5) Note. The magnetic means may be an electromagnet
connected in circuit with an electrode. A mere conductive
connection is not sufficient circuit to exclude the
organization from Class 313.
SEE OR SEARCH THIS CLASS, SUBCLASS:
62 for cyclotrons which include magnetic means.
152 for devices under the class definition which are
provided with a movable electrode and with magnetic means for
moving the electrode.
421 426, 427, 433, and 440, for cathode-ray tubes provided
with magnetic means for deflecting a beam of electrons.
442 for cathode-ray tubes provided with means to focus a
beam of electrons.
SEE OR SEARCH CLASS:
218, High-Voltage Switches With Arc Preventing and
Extinguishing Devices, subclass 22 for electric switches
provided with magnetic means for suppressing arcs when the
circuit is opened.
250, Radiant Energy, 281 for methods and apparatus for ionic
separation or analysis (e.g., mass spectrometry) particularly
subclass 296 for plural diverse field type ion path selecting
means and subclasses 298+ which include magnetic means for
detecting the movement of ionic particles, subclass 309 for
positive ion microscopes and subclasses 396+ for electron or
ion beam deflection or focussing means which may include a
magnetic deflection or focussing member.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, subclass 20 for consumable electrode type
discharge devices (e.g., arc lamps) provided with magnetic
means for influencing the space discharge.
315, Electric Lamp and Discharge Devices: Systems, subclass
40 and 41+ for discharge devices of the magnetron type, that
is, discharge devices which are provided with magnetic means
for influencing the space discharge and which have the
electrodes formed as inductive impedances (e.g., resonators)
or which have the electrodes connected by inductive
impedances; subclasses 236, 267, 338, and 344+ for electrical
systems for supplying electrical energy to electric lamps or
discharge devices of the gas or vapor type, where the lamp or
discharge device is provided with an electromagnet for
influencing its operation.
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, 510 for miscellaneous circuits which
are magnetically effected.
331, Oscillators, subclass 5 and 86+ for electrical
oscillators utilizing a magnetically controlled space
discharge device (e.g., magnetron).
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 210.
373, Industrial Electric Heating Furnaces, subclass 64 and
107, for electric arc furnaces in which the arc is deflected
out of its normal path by a magnetic field.
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, 100 for the use of magnetic devices in apparatus
for containing a plasma yielding, or intended to yield,
thermonuclear reactions.
Subclass:
154
This subclass is indented under subclass 153. Subject matter
where the lamp or discharge device has a plurality of
magnetic devices and/or having magnetic means for producing a
plurality of distinct magnetic fields.
SEE OR SEARCH THIS CLASS, SUBCLASS:
421 426, 427, 433, and 440, for cathode-ray tubes provided
with magnetic means for deflecting a beam of electrons.
442 for cathode-ray tubes provided with means to focus a
beam of electrons.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
343 for systems for supplying electrical energy to discharge
devices of the gas or vapor type having a plurality of
electromagnetic means for influencing the discharge.
Subclass:
155
This subclass is indented under subclass 153. Subject matter
in which at least a portion of the means for generating the
magnetic field is an electrode of the lamp or discharge
device.
(1) Note. Examples of the devices in this subclass are
devices in which a pole face of the magnet also acts as a
discharge electrode and devices in which an electrode is
formed into a coil so that the current therethrough will
produce a magnetic field.
SEE OR SEARCH THIS CLASS, SUBCLASS:
342 for the structure of noninductive filaments.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
40 for lamps and discharge devices which have an electrode
formed as an inductive impedance. Included in subclass 40
are "magnetrons" having plural anodes, the anodes and the
connection therebetween forming "cavity resonators" (e.g.,
inductive impedances). Similar magnetrons will be found in
subclass 42 of Class 315, where the plural anodes are
connected by inductive impedances.
Subclass:
156
This subclass is indented under subclass 153. Subject matter
which includes a discharge device, the magnetic field
generating means being arranged so that the generated
magnetic field extends transversely of the discharge space
between the discharge electrodes.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
39.71 for discharge, devices having an electrode formed so
as to provide a structure having distributed inductance and
capacitance, and operable in a magnetic field (e.g.,
magnetrons), the device having significant magnetic field
generating or pole structure.
Subclass:
157
This subclass is indented under subclass 156. Subject matter
in which one or more elongated tubular electrodes (e.g.,
anode and/or grid) surrounds another elongated electrode
(e.g., cathode), the magnetic means being arranged to
generate a magnetic field which extends along the axis of the
elongated electrodes.
Subclass:
158
This subclass is indented under subclass 157. Subject matter
in which the magnetic means includes magnetic poles which
extend across and face the ends of the concentrically
arranged elongated electrodes and are axially spaced from the
electrodes.
(1) Note. The magnetic pole piece faces are usually planar
and mutually parallel.
Subclass:
159
This subclass is indented under subclass 158. Subject matter
wherein at least one of the magnetic pole pieces has an
opening therein and an electrode supporting member extends
into the opening in the pole piece.
Subclass:
160
This subclass is indented under subclass 153. Subject matter
wherein the lamp or discharge device is provided with an
envelope.
(1) Note. The magnetic field generating means may be within
or without envelope.
Subclass:
161
This subclass is indented under subclass 160. Subject matter
wherein the envelope contains a gas or vapor.
(1) Note. This subclass includes discharge devices having a
gas or vapor at a sufficient pressure to cause ionization of
the gas or the electric discharge and devices wherein the
claims state that the device contains a gas or vapor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
567 and the subclass specified in the notes thereto for
other devices under the class definition which are provided
with an envelope and a gas or vapor atmosphere.
Subclass:
162
This subclass is indented under subclass 160. Subject matter
where the lamp or discharge device has three or more
electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
306 and the subclasses specified in the notes thereto, for
other discharge devices under the class definition which have
three or more electrodes.
Subclass:
163
This subclass is indented under the class definition.
Discharge devices having at least one liquid electrode.
(1) Note. Included in this and the indented subclasses are
discharge devices which have mercury or mercury amalgam
electrodes and discharge devices having electrodes made of
material which becomes liquid only during the operation of
the discharge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
7 for liquid electrode discharge devices in combination with
an evacuating pump.
16 for liquid electrode discharge devices in combination
with electric heater means for heating the liquid electrode.
18 for liquid electrode discharge devices such as mercury
vapor rectifiers which are provided with a metallic envelope
and a casing or jacket enclosing the envelope and having
means for modifying the temperature of the discharge device.
22 for liquid electrode discharge devices provided with a
casing or jacket and means for circulating a heat transfer
fluid in contact with the discharge device.
29 for miscellaneous liquid electrode discharge devices with
means for modifying the temperature of the liquid electrode.
33 and the subclasses specified in the notes thereto for
liquid electrode discharge devices provided with an envelope
and an internal temperature modifying baffle for modifying
the temperature of the vapor within the envelope.
34 for liquid electrode discharge devices provided with an
envelope which has condensing chamber or surface for
condensing the electrode vapor into liquid form.
150 for liquid electrode discharge devices wherein the
liquid electrode is movable.
328 for liquid electrode receptacles for use with liquid
electrode discharge devices.
549 for discharge devices under the class definition which
are provided with means, such as a body of mercury, which is
designed to be vaporized during the operation of the device
to supply the gas or vapor atmosphere in the device, see
subclasses 559+ where the electrode is formed of or is coated
with a material (e.g., an alkali metal) which vaporizes
during the operation of the device to supply the gas or vapor
atmosphere in the device.
SEE OR SEARCH CLASS:
200, Electricity: Circuit Makers and Breakers, subclass
61.05, 61.47, 80, 81.6, and 182+ for liquid contact electric
switches in which an electric circuit is made through a
conducting liquid.
218, High-Voltage Switches With Arc Preventing and
Extinguishing Devices, 1 for liquid contact electric
switches in which an electric circuit is made through a
conducting liquid.
315, Electric Lamp and Discharge Devices: Systems,
appropriate subclasses for systems for supplying electrical
energy to liquid electrode lamps during the starting and
operating periods. See 289, where the system includes means
for generating a surge of potential during the starting
period. See subclasses 327+, where the electrodes are in
contact with each other during the starting. See subclasses
328+, where the discharge device is tilted to flow the liquid
electrode into contact with the other electrode. See
subclasses 330+ and 335+ where the device is provided with an
auxiliary starting electrode.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 47 for electromagnetically operated
switches utilizing conductive liquid.
Subclass:
164
This subclass is indented under subclass 163. Discharge
devices provided with means to prevent damage to the device
by movement of the liquid during handling.
Subclass:
165
This subclass is indented under subclass 163. Discharge
devices having a plurality of liquid electrodes.
(1) Note. One of the liquid electrodes may be an auxiliary
starting electrode, an auxiliary holding electrode, or both
liquid electrodes may be principal discharge electrodes.
Subclass:
166
This subclass is indented under subclass 163. Discharge
devices having an envelope and having an electrode exteriorly
of the envelope.
(1) Note. This subclass includes discharge devices provided
with two electrodes within the envelope and a metal band
surrounding the envelope in the vicinity of the liquid
electrode. The external electrode may also be a conductor
member exterior of the envelope which extends from one of the
electrodes into the vicinity of the liquid electrode. Also
included are envelopes having re-entrant portions, a wire or
rod electrode being within the re-entrant portion and
exterior to the space enclosed by the envelope. The
auxiliary electrodes in the devices in this subclass are
often used to electrically stress the region near the liquid
electrode to facilitate the initiation of the discharge in
the device.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 349 and
the subclasses specified in the notes thereto, for
miscellaneous systems for supplying electrical energy to
discharge devices of the liquid electrode type which are
provided with a discharge controlling means, (e.g., external
electrode).
329, Demodulators, appropriate subclasses and particularly
subclass 368 for an amplitude modulation demodulator
utilizing an electron discharge device which may include an
exterior liquid electrode.
Subclass:
167
This subclass is indented under subclass 163. Discharge
devices having a liquid electrode and another principle
discharge electrode (e.g., anode) and having a grid electrode
or other apertured electrode located in the discharge space
between the liquid electrode and the other principle
electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
326 for the miscellaneous electrodes which are provided with
only a single aperture.
348 for the structure of grid electrodes and other
foraminous electrodes.
356 for the structure of tubular and other hollow
sleeve-like electrodes.
597 for gas or vapor discharge devices which are provided
with a grid or apertured electrode interposed in the
discharge space, the grid or apertured electrode and the
anode being within a hollow shield. The structures in
subclasses 597+ are closely analogous to those used with
liquid electrode discharge devices. Also 597+, for other
discharge devices having an envelope and a confined
atmosphere or gas or vapor which have a grid or other
apertured electrode interposed in the discharge space between
the cathode and the anode.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 349 and
the subclasses specified in the notes thereto for systems for
supplying electrical energy to gas or vapor discharge devices
and to liquid electrode discharge devices which have control
electrodes.
Subclass:
168
This subclass is indented under subclass 163. Discharge
devices having an envelope which is formed so as to have a
portion for the liquid electrode and at least two separate
anode chamber portions with anodes therein.
(1) Note. In the structures in this subclass, the anode
chambers serve to shield the anodes from each other so that
discharges from one anode to another are made more
difficult.
SEE OR SEARCH THIS CLASS, SUBCLASS:
34 for liquid electrode devices which are provided with a
condensing chamber and separate anode chambers for the
anodes.
169 for the liquid electrode discharge devices which have a
plurality of anodes with shielding means to prevent
discharges between the anodes.
634 for gas or vapor type discharge devices which are
distinguished by the envelope structure.
SEE OR SEARCH CLASS:
220, Receptacles, 2.1, for the structure of envelopes, per
se, for discharge devices.
Subclass:
169
This subclass is indented under subclass 163. Discharge
devices which has a plurality of anodes and which have a
shield interposed between two of the anodes to prevent
discharges from one anode to the other.
(1) Note. In some of the devices in this subclass, each of
the anodes is surrounded by a tubular sleeve which is the
anode shield.
SEE OR SEARCH THIS CLASS, SUBCLASS:
239 for miscellaneous supporting structures for shields.
326 for miscellaneous shield structures, note subclass 356
for the structure of tubular or hollow sleeve-like shields.
590 for other gas or vapor type discharge devices which have
a shield interposed between two of the anodes to prevent a
discharge therebetween.
597 for gas or vapor type discharge devices which are
provided with a hollow shield which encloses an anode and a
grid-like electrode, the shield serving to prevent undesired
discharges to the anode.
614 for gas or vapor type discharge devices which are
provided with an anode shield to prevent undesired discharges
to the anode.
Subclass:
170
This subclass is indented under subclass 163. Discharge
devices having an auxiliary starting or holding electrode in
addition to the principal discharge electrodes.
(1) Note. See the glossary in the class definition for the
definition of "auxiliary starting electrode" and "holding
electrode".
SEE OR SEARCH THIS CLASS, SUBCLASS:
146 where the auxiliary electrode is movably mounted so that
it may be brought into contact with the liquid electrode, see
indented subclass 150, where the auxiliary electrode is a
movable liquid electrode.
596 and 601+, for other gas or vapor type discharge devices
within the class definition which have an auxiliary starting
electrode.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, subclass 34, for discharge devices of the
consumable electrode type (e.g., arc lamps) which are
provided with an auxiliary starting electrode.
315, Electric Lamp and Discharge Devices: Systems,
appropriate subclasses, for systems for supplying electrical
energy to liquid electrode discharge devices during the
starting and operating periods; see 289, where the systems
include means for generating a surge of potential during the
starting period, subclasses 330+, where the auxiliary
electrode and one of the principal electrodes are brought
into contact with each other during the starting operation,
and subclasses 335+, for the miscellaneous systems where the
discharge device is provided with an auxiliary starting or
holding electrode.
Subclass:
171
This subclass is indented under subclass 170. Discharge
devices in which the auxiliary electrode is in contact with
or is wholly or partially immersed in the liquid electrode.
(1) Note. This subclass includes discharge devices where
the auxiliary electrode is encased in an insulating covering,
the insulated electrode being wholly or partially immersed in
the liquid electrode. Also included are discharge devices
which have a starting electrode of the "ignition" type (e.g.,
an electrode of high resistance material) which is in contact
with the liquid electrode.
Subclass:
172
This subclass is indented under subclass 163. Discharge
devices in which the liquid electrode makes contact with a
plurality of other electrodes.
(1) Note. This subclass includes discharge devices having
two electrodes which are wholly or partially immersed in a
conducting liquid (e.g., mercury), there being no electrical
contact to the liquid excepting that made by the electrodes
which are immersed in it. The devices in use are intended to
volatilize the liquid thereby interrupting the circuit
between the two electrodes to establish a discharge, the
liquid forming the gas or vapor in which the discharge is to
be maintained.
SEE OR SEARCH THIS CLASS, SUBCLASS:
232 for discharge devices in which the electrodes are
immersed in a nonconducting liquid, the discharge creating a
path for itself through the liquid.
Subclass:
173
This subclass is indented under subclass 163. Discharge
devices provided with means to prevent the discharge from
wandering over the surface of the liquid electrode.
(1) Note. Examples of the devices found in this subclass
are liquid electrode discharge devices having a pointed rod
extending from the liquid electrode and discharge devices
having restricting means such as an apertured baffle so that
the discharge must pass through the aperture to reach the
liquid electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
328 for liquid electrode receptacles for use with liquid
electrode discharge devices.
Subclass:
230
This subclass is indented under the class definition.
Discharge devices which are provided with an electrode or
other device for emitting positive ions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
163 for discharge devices which have a liquid electrode
(e.g., mercury), which is the source of positive ions during
the operation of the device.
359.1 for discharge devices provided with means to form and
accelerate positive or negative ions.
567 for discharge devices which are provided with an
envelope containing an atmosphere of gas or vapor, the gas or
vapor being ionized in the operation of the device and
therefore being a source of positive ions.
Subclass:
231.01
FLUENT MATERIAL SUPPLY OR FLOW DIRECTING MEANS:
This subclass is indented under the class definition.
Subject matter including (a) means to direct the flow of
fluent material into the discharge area of a discharge
device, (b) means to direct the flow of fluent material into
contact with some part of the device, (c) means to direct the
flow of gas vapor or smoke generated by an electrode in the
operation of the device, or (d) means to direct the flow of
gases or vapors which are caused to circulate due to having
been heated by an electrode, the space discharge, or other
part of the device.
(1) Note. This subclass includes both lamps and space
discharge devices with fluent material flow directing means.
The space discharge devices in this and indented subclasses
are not restricted to discharge devices having discharge
electrodes but include discharge devices with an
electrodeless discharge, for example, an induction-type
discharge device.
(2) Note. Smoke as used in this subclass includes all
particles given off by the filament or an electrode in the
operation of the device.
(3) Note. Patents disclosing incandescent lamps and
discharge devices having an envelope enclosing a gas or
vapor, the device being provided with means to direct the
flow of the gas or vapor which circulates within the envelope
due to the gas or vapor becoming heated are cross-referenced
to this subclass.
(4) Note. See the class definition for a reference to other
classes which provide for the treating of fluids with ray
energy, electrons, or ions generated by space discharge
devices or lamps.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 where the device is provided with an envelope and in
internal temperature modifying baffle.
34 where the device is provided with an envelope which has a
condensing chamber or surface for condensing the vapors
within the envelope.
35 for devices which are provided with means for directing
the flow of a temperature modifying fluid to some part of the
device.
120 for spark plugs provided with means to supply fluid from
the exterior of the spark plug to the electrode chamber
(e.g., with a priming cup).
143 for spark plugs having the electrode chamber shaped so
as to direct the flow of gas or vapor.
359.1 for ion generators with means for accelerating the
ions.
564 where the device is provided with an envelope and
contains a getter or a gas or vapor generating material
within the envelope and is provided with means for causing
the material deposited from the getter or vapor to deposit in
a particular place within the device.
609 for discharge devices which are provided with an
envelope containing a gas or vapor and which have a
partition, baffle, constricting means, or a portion of the
envelope wall between the discharge electrodes to alter the
direction of the discharge or to constrict the area of the
discharge path within the device.
626 for devices which are provided with an envelope
containing a gas or vapor and which have shielding means for
the electrode lead-in or electrode support to prevent the
deposited material from being deposited in contact with the
electrode lead-in or support.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, 15 for electrostatic
precipitators having analogous structure.
250, Radiant Energy, subclass 251 for devices for producing
and propagating a unidirectional stream of neutral molecules
or atoms through a vacuum, usually with thermal velocity;
subclasses 281+ for methods and apparatus for ionic
separation or analysis; especially subclass 288 which
includes a sample supply or invisible radiation responsive
gas; subclasses 379+ for discharge device apparatus which
includes means to supply the gas into the discharge devices;
subclasses 396+ for means to deflect, scan, spread, or focus
a performed beam of ions; and subclasses 423+ for ion
generation methods and apparatus in which a material is
treated or irradiated.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, subclass 20 for discharge devices of the
consumable electrode type (e.g., arc lamps) which are
provided with means for directing a fluent material into the
discharge space to deflect the discharge out of its normal
path; subclass 22 for consumable electrode discharge devices
which have means to feed a fluent material (which may be
solid particles) to the discharge space; and subclasses 26+
for consumable electrode discharge devices which are provided
with a ventilator or fume director, see especially indented
subclass 28.
315, Electric Lamp and Discharge Devices: Systems, 111.01
for discharge device load with fluent material supply to the
discharge space.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, subclass 210 for ion or electron beam
deflecting magnets, per se, and the search notes thereto for
combinations including such magnet means.
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, 100 for processes or devices for directing or
injecting electrically charged or accelerated particles into
a plasma body wherein the intent is to obtain a nuclear
fusion reaction.
Subclass:
231.11
Lightning or surge arrester:
This subclass is indented under subclass 231.01. Subject
matter including two electrodes designed and positioned to
provide an internal series gap to protect an electric
apparatus from high transient voltages.
Subclass:
231.21
Expulsion type:
This subclass is indented under subclass 231.11. Subject
matter including an arcing chamber in which a gas evolving or
other arc-extinguishing material is brought into contact with
the arc to interrupt the follow current.
Subclass:
231.31
Plasma:
This subclass is indented under subclass 231.01. Subject
matter including means for producing a plasma.
(1) Note. Usually plasmas have a neutral net charge, but
not necessarily so.
SEE OR SEARCH THIS CLASS, SUBCLASS:
231.71 for arc discharge devices which produce visible
light.
Subclass:
231.41
Arc discharge type:
This subclass is indented under subclass 231.31. Subject
matter including two electrodes between which an arc is
developed and including structure to direct the produced
plasma in a direction out of the device.
Subclass:
231.51
With tangential fluent supply:
This subclass is indented under subclass 231.41. Subject
matter including means for directing fluent material to the
area of the arc and tangentially with respect to the
direction the plasma is directed.
Subclass:
231.61
Electromagentic output (i.e., light):
This subclass is indented under subclass 231.41. Subject
matter including means to provide a visible light output.
Subclass:
231.71
Arc discharge lamp or radiation source:
This subclass is indented under subclass 231.01. Subject
matter including two electrodes between which an arc is
developed and wherein the arc is the source of radiant
energy.
Subclass:
232
This subclass is indented under the class definition.
Devices having an electrode which is wholly or partially
immersed in a liquid.
(1) Note. This subclass includes discharge devices which
have the electrode wholly or partially immersed in a
nonconducting liquid. Where the electrodes are immersed in a
conducting liquid see the subclasses referred to in the
search notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
35 and the subclasses specified in the notes thereto for
devices which using liquids or which have means for directing
the flow of a fluid towards some part of the device for the
purpose of modifying the temperature of the device.
163 and the subclasses specified in the notes thereto, for
discharge devices which are provided with a liquid electrode.
In the devices in subclasses 163+ the liquid electrode
ordinarily has a lead-in wire immersed in the liquid and
another electrode which may also be liquid which is not
immersed in the liquid. However, see the reference to
subclass 172, infra. See subclass 171 where the discharge
device is provided with an auxiliary starting electrode which
is wholly or partially immersed in the liquid electrode. See
subclass 172 where a plurality of nonliquid electrodes are
immersed in a liquid electrode which is vaporized during the
operation of the discharge device the liquid supplying the
vapor atmosphere for the device and serving to initiate the
discharge between the nonliquid electrodes.
SEE OR SEARCH CLASS:
200, Electricity: Circuit Makers and Breakers, subclass
61.05, 61.47, 81.6, 141, and 182+ for liquid contact
switches.
218, High-Voltage Switches With Arc Preventing and
Extinguishing Devices, 1 for liquid contact switches.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 47 for electromagnetically actuated
liquid contact switches.
361, Electricity: Electrical Systems and Devices, subclass
435 for electrolytic interrupters.
Subclass:
233
This subclass is indented under the class definition.
Devices which include an envelope and which are defined by
the degree of vacuum in the envelope.
(1) Note. The devices in the subclass contain no
appreciable amount of gas and are intended to be operated as
vacuum devices. However, merely defining a device as a
vacuum device will not be sufficient to cause classification
of the patent in this subclass unless the degree of vacuum is
specified. Devices defined merely as vacuum devices are
classified in the other appropriate subclass in this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
567 for devices with a gas or vapor in the envelope even
though the device is not intended to be operated with
ionization of the gas or vapor; if the claims state that the
device contains a gas or vapor, the patent is classified in
subclass 567 even though the pressure is such that the device
has the characteristics of a vacuum device. see (1) Note,
above.
577 for such gas or vapor devices where the pressure is only
a hundred microns (0.1 mm.) or less.
Subclass:
234
This subclass is indented under the class definition.
Discharge devices which include an envelope and which have at
least one electrode of the device exterior to the space
enclosed by the envelope.
(1) Note. Some of the discharge devices in this subclass
have one or more electrodes within the envelope and another
electrode exterior to the envelope. For example, the
discharge device may have a cathode and an anode within the
envelope, and a control electrode exterior to the envelope.
(2) Note. This subclass does not include devices under the
class definition which have an envelope formed in whole or
part of metal or other conductive material and being designed
for use as an electrode. For such devices, see the
subclasses referred to under "SEARCH THIS CLASS, SUBCLASS"
below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
166 where the discharge device is provided with a liquid
(e.g., mercury) electrode.
246 for discharge devices which include an envelope, a part
of the envelope being formed of metal or conductive material
which is designed for use as an electrode, the device
including means for supporting and/or spacing a plurality of
electrodes in the envelope.
607 where the envelope contains a gas or vapor (i.e., gas or
vapor type discharge devices).
SEE OR SEARCH CLASS:
329, Demodulators, appropriate subclasses and particularly
subclass 368 for an amplitude modulation demodulator
utilizing an electron discharge device which may include an
exterior electrode.
Subclass:
235
This subclass is indented under the class definition.
Devices which include a plurality of electrodes which are
maintained in imperfect electrical contact, the devices being
designed so that the passage of electrical current from one
electrode to the other will either produce light or cause the
electrodes to be heated adjacent the ends of the electrodes
which are in contact with each other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
315 and the subclasses specified in the notes to the
definition of those subclasses for other incandescent lamps.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, appropriate subclasses, for consumable electrode
devices (e.g., arc lamps) which are provided with means for
feeding one electrode towards the other as the electrode is
consumed.
Subclass:
236
This subclass is indented under the class definition.
Devices which have a plurality of similar electrodes and
which are provided with means other than the mere terminals
of the electrodes so that one of the similar electrodes can
be used to the exclusion of the other, the means being
capable of selecting either of the similar electrodes for
use.
(1) Note. Some of the devices in this subclass are designed
so that one electrode may be used until the electrode fails
to operate properly and then another electrode may be
substituted for the electrode which failed.
(2) Note. This subclass does not include devices, which
include no more structure than a device having the electrodes
connected to separate terminals so that different electrodes
may be selectively energized by connecting their respective
terminals to proper sources of electrical current or
potential without altering in any way the structure of the
lamp or discharge device. For example, excluded is a
multiple filament lamp which is provided with three or four
terminals so that either filament may be energized by
connecting the current supply conductors to the proper
filament terminals. Also excluded is the control grid type
discharge device which may be operated as a diode rectifier
by either connecting the control grid to the anode or leaving
the control grid unconnected. The devices in this subclass
include some structure in the lamp or discharge device which
is provided only to make it possible to selectively use the
electrodes. For example, included in this subclass are two
filament devices having three terminals for the filaments,
one terminal being covered by insulation until one of the
filaments fails when the insulation is removed and the other
filament used. Also included are devices having two filaments
with two terminals, one filament not being connected to a
terminal, the device being provided with means for connecting
the second filament to the terminals when the first filament
fails.
SEE OR SEARCH THIS CLASS, SUBCLASS:
52 for devices under the class definition which are provided
with means for converting the device into a different type of
device, such as converting a three electrode discharge device
so that it operates as a two electrode device.
121 for spark plugs having reversible parts so that a new
part can be substituted for a worn part by reversing a part
(e.g., as the core and center electrode).
128 for spark plugs having a plurality of center electrodes
so that one may be used when the other is worn.
140 for spark plugs having a plurality of electrodes or an
electrode with plural joints cooperating with another
electrode so that as one electrode wears and the spark gap
becomes too wide the spark will form between another
electrode or electrode point (e.g., multigap spark plugs).
237 for devices under the class definition which are
provided with means for replacing an electrode which is
defective or which are provided with an envelope and parts
that are made so that the device can be readily disassembled
to repair a defective portion of the device.
306 and the subclasses specified in the notes to the
definition of those subclasses for discharge devices with
three or more electrodes.
316 and the subclasses specified in the notes to the
definition of those subclasses for lamps having a plurality
of filaments or glowers.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 1 for discharge devices of the consumable
electrode type (e.g., arc lamps and similar devices provided
with means for feeding the electrodes together) which have
means for substituting one electrode for another when the
first electrode is consumed or fails to operate properly.
315, Electric Lamp and Discharge Devices: Systems, 32 for
electric lamps and discharge devices which have structurally
combined therewith a circuit element, such as a switch or
fuse, which circuit element may be for the purpose of
permitting the selective use of the electrodes of the device,
see especially indented subclass 65 for lamps and discharge
devices which include a plurality of filaments, one of which
is maintained in nonoperated condition while another is in
operative condition and which have means for automatically
substituting the nonoperating filament for the operating
filament when either the operating filament fails or when the
conditions of the supply circuit change so that it is
desirable that the nonoperating filament be substituted for
the operating filament. Subclasses 88+, for systems for
supplying electrical energy to lamps and discharge devices
which are provided with means for automatically substituting
another electrode in the lamp or discharge device for an
electrode which has failed or which is provided with means
for substituting another lamp or discharge device for a lamp
or discharge device which has failed.
Subclass:
237
This subclass is indented under the class definition.
Devices which are provided with an envelope and which have
means for replacing a defective electrode, or which the
envelope and parts of the device made so the device can be
readily disassembled to repair or replace a part of the
device.
(1) Note. Included in this subclass are devices provided
with glass or other envelopes which are made so that the
envelope can be readily opened or an opening made therein so
that a new electrode can be inserted in the device. Also
included are devices which have an electrode in the envelope
not mounted on its supports or in position for use and which
include means so that the electrode can be brought into
position on the supports to replace a defective electrode.
The defective electrode is usually removed from contact with
its lead wires or supporting means and a new electrode
substituted for the defective electrode, the defective
electrode being stored within the device or entirely removed
from the device. Where the device has a plurality of
electrodes which are provided with individual lead wires or
supporting means, one electrode remaining inactive while
another is active, means being provided to change the
connections to the terminals of the electrodes so that the
inactive electrode may be used if it is so desired, see
subclass 236 of this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118 for spark plugs which are demountable see subclass 119
where the spark plug is provided with sealing off means so
that a part (e.g., the core) can be removed and repaired
without stopping the ending, subclass 121 where the repair is
made by reversing the position of a part (e.g., of the
insulator), subclass 122 where the spark plug has a removable
electrode on the shell, and subclasses 144+ for spark plugs
with particular joint structure permitting disassembly of the
plug.
236 where the device includes a plurality of electrodes and
which are provided with means so that one electrode can be
used to the exclusion of another until the first electrode
fails and has means for substituting the second electrode
therefor. See (1) Note above.
314 for devices under the class definition which are
especially designed to be nonrepairable.
SEE OR SEARCH CLASS:
220, Receptacles, 2.1 for envelopes, per se, for lamps and
discharge devices.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 1 for discharge devices of the consumable
electrode type (e.g., arc lamps and similar devices provided
with means for feeding the electrodes together) which have
means for replacing and electrode with another when the first
electrode is consumed or fails to operate properly.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, subclass 2 for methods for repairing electric
lamps and discharge devices and subclass 61 for the
corresponding apparatus.
Subclass:
238
This subclass is indented under the class definition.
Devices having means for supporting an electrode or a
shielding structure, and/or provided with means to space an
electrode, or a shield, or a support for an electrode or
shield with respect to another part of the device.
(1) Note. This and the indented subclasses provide only for
patents which claim significant supporting and/or spacing
structure for the electrode or shield. Where the claim
broadly recites supporting and/or spacing means for the
electrode and shield and no structure of the supporting
and/or spacing means is included in the claim, the patent is
excluded from this and the indented subclasses and will be
found in one of the other appropriate subclasses of this
class. Where the patent for the device discloses or claims
structure in addition to the supporting and/or spacing
structure for an electrode or a shield, the patent is
classified in this or one of the indented subclasses, and is
cross-referenced for the additional structure to the other
subclasses below these subclasses. This and the indented
subclasses also include cross-references of lamps and
discharge devices which disclose specific supporting and/or
spacing structure for an electrode or shield which are
classified in the preceding subclasses.
(2) Note. A spacer is a means, such as a rod, bar, or
plate, provided to maintain an electrode or shield or a
supporting member in spaced relation with respect to another
part of the device, and is usually in addition to the means
for supporting the electrode or shield with respect to the
supporting base or envelope of the device. Members
interposed between two different electrodes or electrode
supports are considered spacing members. Members interposed
between an electrode and the envelope of the device which are
not intended to support the mass of the electrode with
respect to the envelope are spacing members. Where one
electrode is mounted upon a second electrode, as for example,
being wound upon or coiled about the second electrode, the
second electrode is a spacing member. Spacers are usually
mounted upon, and supported by, an electrode or electrode
support, but a spacer interposed between two electrodes may
serve to at least partially support the third electrode with
respect to a supporting base.
(3) Note. For the definition of "electrode" and "shield",
see the glossary in the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
42 for devices under the class definition which have a heat
transfer means (e.g., cooling fins) mounted upon an electrode
support or which have an electrode support designed to modify
the flow of heat along the electrode support (e.g., to
restrict or accelerate the flow of heat).
49 for devices under the class definition which are provided
with a support for the device.
118 for spark plugs with supporting and spacing structure.
146, for devices under the class definition which have an
electrode or shield movably mounted upon its support.
237 for devices under the class definition which have an
electrode and a spare electrode, the supporting means for the
electrode being designed so that the first electrode may be
removed from its support when it fails to operate properly
and the second electrode substituted therefor.
SEE OR SEARCH CLASS:
248, Supports, appropriate subclasses for miscellaneous
supports for articles.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, appropriate subclasses for discharge devices of
the consumable electrode type (e.g., arc lamps and similar
devices which are provided with means for feeding the
electrodes together as they are consumed) which have
supporting and/or spacing structure for an electrode or
shield.
Subclass:
239
This subclass is indented under subclass 238. Devices having
supporting and/or spacing structure for a shield.
(1) Note. For the definition of shield, see the glossary in
the class definition. Note that shields do not include
shield grid electrodes, see the reference to subclass 265
below.
(2) Note. Devices which are provided with an envelope made
in whole or part of metal or conductive material and which
include supporting and/or spacing structure for an electrode
or shield other than the metal or conductive envelope portion
(such as an electrode or shield within the envelope or an
electrode or shield exterior to the envelope) are classified
as follows. This subclass includes those devices with a metal
or conductive envelope where the the envelope is disclosed or
claimed as being provided for shielding purposes and where
such envelope is not designed for use as an electrode of the
device, such as the anode, and no other shielding structure
is claimed. Where other shielding structure is claimed, the
patent is classified in the appropriate indented subclass.
Where the metal or conductive envelope is designed for use as
an electrode, the patent is classified in either subclasses
246+ where the supporting and/or spacing structure for a
plurality of electrodes is claimed or in subclass 317 where
no other supporting or spacing structure is claimed. Where
the metal or conductive envelope is not claimed not disclosed
as either a shield or as an electrode, but one or more
electrodes are supported by the conductive envelope portion,
the patent is classified in subclass 248 where the supporting
and/or spacing structure for a plurality of electrodes is
claimed and in subclass 281 or 282 where the supporting
and/or spacing structure for only a single electrode is
claimed. Envelopes, per se, having at least a portion of the
envelope formed of metal or conductive material are in Class
220, subclass 2.3, or in one of the classes specified in the
notes to the definition of that subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 for devices under the subclass which are provided with
means for supporting and/or spacing a heat transfer device
(e.g., radiating fins), or which are provided with means for
supporting and/or spacing a heat shielding means. See
especially subclasses 37+ where the device is provided with a
heat shield for a cathode or filament, and subclass 47 for
devices with miscellaneous heat shields.
265 for discharge devices under subclass 238 which have
means for supporting a grid electrode or other apertured
electrode between two other electrodes (e.g., which have
means for supporting a shield grid) but which do not have any
means for supporting or spacing a shield.
246 see (2) Note, above.
248 see (2) Note, above.
281 see (2) Note, above.
282 see (2) Note, above.
317 see (2) Note, above.
SEE OR SEARCH CLASS:
220, Receptacles, subclass 2.3, see (2) Note, above.
Subclass:
240
This subclass is indented under subclass 239. Devices having
the shield supported by an electrode, an electrode support,
or an electrode spacing member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 for devices under the subclass definition which have a
heat transfer means or a heat shielding means mounted upon an
electrode, electrode support or electrode spacing member.
See subclasses 37+ for devices with filaments or cathodes
which are provided with heat shields, subclasses 39+ where
the heat transfer means or heat shield is for an electrode
within the envelope, usually being supported on or forming
part of the electrode, and subclass 42 where the heat is
mounted upon an electrode support.
Subclass:
241
This subclass is indented under subclass 240. Discharge
devices having a plurality of electrodes mounted in side by
side, concentric or co-axial relation, one end of the
electrodes being positioned in substantially co-planar
relation, and the shield being supported so that it extends
across the ends of the electrodes.
Subclass:
242
This subclass is indented under subclass 239. Devices in
which the device is enclosed within an envelope which is
provided with a stem, the shield being either supported by
the stem or the stem being formed so as to constitute a
shield.
(1) Note. A stem is the portion of the envelope which is
usually used for supporting the support wires for the
electrodes and for sealing in the lead-in wires for the
electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43 for devices under the class definition which are provided
with a heat transfer device or a heat shield for protecting
the lead-in-seal or the stem of the envelope.
219 for discharge devices which have an envelope containing
an atmosphere of gas or vapor, the discharge device including
a shield which is supported by the stem or which is a part of
the stem for shielding the electrode support or lead-in
wire.
317 for devices under the class definition which have an
enclosing envelope.
Subclass:
243
This subclass is indented under subclass 238. Discharge
devices having means for supporting a plurality of electrodes
of the discharge device or having means for spacing a
plurality of electrodes of the discharge device either from
each other or with respect to another part of the discharge
device.
(1) Note. This subclass and subclasses 267 and 268 provide
for the discharge devices which do not have an envelope and
which have supporting and/or spacing structure for a
plurality of electrodes. Indented subclass 244 provides for
discharge devices which have an envelope and supporting
and/or spacing structure for plural electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118 for spark plugs having supporting and spacing structure
for a plurality of spark electrodes.
Subclass:
244
This subclass is indented under subclass 243. Discharge
devices in which the device is enclosed within an envelope,
the electrodes being supported by or forming part of the
enclosing envelope.
(1) Note. The electrodes need not be supported directly
upon the envelope, but may be supported upon support rods or
other support members which are supported by the enclosing
envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
239 where the discharge device also includes supporting
and/or spacing structure for a shield.
283 and the subclasses specified in the notes thereto for
other devices under the class definition which include an
envelope and an electrode, the electrode being supported by
the envelope.
Subclass:
245
This subclass is indented under subclass 244. Discharge
devices having means for supporting and/or spacing three or
more electrodes which are arranged to form a plurality of
separate discharge spaces.
(1) Note. Included in this subclass are discharge devices
having a plurality of anodes and a cathode, or a plurality of
cathodes and an anode. Also included are cross-references of
discharge devices of the plural unit type (e.g., each cathode
having a separate anode) where significant supporting and/or
spacing structure is disclosed.
(2) Note. This and the indented subclasses do not provide
for the supporting and spacing structure for discharge
devices which are provided only with a cathode, a second
electrode (e.g., anode) with which the cathode forms a first
discharge space, and a third electrode in the form of a grid
or foraminous electrode interposed in the discharge space
formed by the cathode and second electrode even though the
disclosure and claims of the patent state that the third
electrode is intended to receive electrons emitted by the
cathode. The supporting and/or spacing structure for such
discharge devices is in subclass 265 and the subclasses
specified in the notes to the definition of that subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for plural unit discharge devices (i.e., discharge devices
having a plurality of separate cathodes, each cathode having
a separate anode).
239 for this subject matter where the discharge device
includes a shield between the separate discharge spaces and
means for supporting the shield.
265 see (2) note, above.
306 and the subclasses specified in the notes thereto for
patents for discharge devices having three or more electrodes
arranged to form a plurality of separate discharge spaces
where no significant supporting and/or spacing structure for
the electrodes is claimed.
Subclass:
246
This subclass is indented under subclass 244. Discharge
devices having at least one of the electrodes forming at
least part of the envelope wall.
(1) Note. This and the indented subclasses include patents
for discharge devices where the device has at least a portion
of the envelope formed of metal or conductive material, the
metal or conductive portion of the envelope being defined as
an electrode, and where the claims include the supporting
and/or spacing structure for a plurality of electrodes.
Where only a single electrode which forms at least part of
the envelope wall is claimed, the patent is classified in
Class 220, Receptacles, subclass 2.3 if only envelope
structure is claimed or in subclasses 317+ of class 313 if
structure is claimed which limits the device to being a
discharge device. See the class definition. Where the
conductive envelope forms a shield for the enclosed
electrodes, and supporting or spacing structure for the
electrodes is claimed the patent is classified in subclasses
239+. (See (2) Note to the definition of subclass 239).
Where the conductive envelope forms neither a shield nor an
electrode, but has a plurality of electrodes supported by the
conductive wall portion, the patent is classified in subclass
248. Envelopes, per se, which have a conductive wall portion
are in subclasses 317+ or in one of the classes specified in
the notes to the definition of that subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
18 for discharge devices which have an electrode forming
part of the envelope wall and which have a casing or jacket
surrounding the electrode, the casing or jacket being
designed to receive a heat transfer medium (e.g., fluid
cooled metal envelope devices).
239 see (1) Note above.
248 see (1) Note above.
281 for devices having an electrode supported in an aperture
in a conductive wall.
282 for devices having an electrode supported by supports
which form part of or are attached to the conductive wall of
an envelope.
317 see (1) Note above.
SEE OR SEARCH CLASS:
220, Receptacles, subclass 2.3 see (1) note above.
Subclass:
247
This subclass is indented under subclass 246. Discharge
devices wherein the electrode which forms part of the
envelope wall is in the form of a hollow body having an open
end, the open end being closed either by means of another
electrode which is electrically insulated from the hollow
electrode or by a closure which supports another electrode in
electrical insulating relation with respect to the hollow
electrode.
Subclass:
248
This subclass is indented under subclass 244. Discharge
devices which have at least part of the envelope formed of
electrically conductive material, a plurality of electrodes
or supports for a plurality of electrodes being supported by
the conductive portion of the envelope wall.
SEE OR SEARCH THIS CLASS, SUBCLASS:
239 where the discharge device is enclosed within an
envelope which has a conductive wall portion, and the wall
portion is disclosed or claimed as being a shield. See note
2 to the definition of subclass 239.
246 where the conductive wall portion is claimed or
disclosed as being an electrode, and supporting and/or
spacing structure for a plurality of electrodes is claimed.
281 for devices under the class definition having the
conductive envelope portion provided with an aperture and an
electrode mounted in or around the aperture.
282 for devices under subclass 238 where the device is
provided with an envelope, the electrode support being either
formed of or attached to a conductive wall portion of the
envelope.
SEE OR SEARCH CLASS:
220, Receptacles, subclass 2.3 for envelopes, per se, with
conductive wall portions.
Subclass:
249
This subclass is indented under subclass 244. Discharge
devices where the envelope is elongated, the electrodes being
mounted in spaced relation along the longitudinal axis of the
envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
245 for discharge devices with supporting and/or spacing
structure for three or more electrodes which are arranged to
form a plurality of separate discharge spaces, a plurality of
the electrodes being mounted in spaced relation along the
length of another electrode.
SEE OR SEARCH CLASS:
331, Oscillators, subclass 98 for oscillators utilizing disk
seal tubes (e.g., lighthouse, pencil tube) enclosed by
distributed parameter resonators.
Subclass:
250
This subclass is indented under subclass 249. Devices
provided with electrode spacing means interposed between
different electrodes or different electrode supports.
(1) Note. For the definition of "spacer", see (2) Note to
the definition of subclass 238.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257 for other discharge devices having a plurality of
electrodes supported upon supporting rods, wires or tubes
which are supported by the envelope of the device, the device
being provided with spacing means for the electrodes or
electrode supports.
285 for devices within the class definition which are
provided with an envelope and which have an electrode
supported by means of a plurality of support wires, rods, or
tubes which are supported by the envelope, a spacer member
being provided between the different electrode support wires,
rods or tubes.
288 for devices within the class definition which are
provided with an envelope and which have an electrode
supported by means of a supporting wire, rod, or tube which
is supported by the envelope, a spacer member being provided
between the electrode or the electrode support and the
envelope wall.
Subclass:
251
This subclass is indented under subclass 249. Discharge
devices having a plurality of electrodes supported by a
common support wire, rod or tube, the electrodes being spaced
along the longitudinal axis of the supporting wire, rod or
tube.
Subclass:
252
This subclass is indented under subclass 244. Discharge
devices having electrodes which are supported by supporting
structure, such as wires, rods, or tubes, the supporting
structure being supported by the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 for devices under the class definition which are provided
with an envelope and which have a heat transfer device (e.g.,
radiating fins, etc..) or means to modify the temperature of
the device (e.g., heat conserving means) mounted upon the
electrode or electrode support. See subclass 37 where the
filament or cathode is provided with such means, subclass 39
where the heat transfer means or temperature modifying device
is for an electrode, and subclass 42 where such means are
mounted upon an electrode support.
245 where the discharge device has the electrodes arranged
to form a plurality of separate discharge spaces (e.g., has
plural cathodes and/or anodes).
246 where at least one of the electrodes forms at least part
of the envelope wall.
248 in which the envelope is formed of conductive material
the electrode supports being supported by the conductive
envelope wall.
249 where the envelope is elongated and the electrodes are
mounted in spaced relation along the longitudinal axis of the
envelope.
284 and the subclasses specified in the notes thereto for
devices within the class definition which have an envelope
and an electrode supported by a supporting member which is
supported by the envelope.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 50.54
for miscellaneous hermetically sealed envelopes of general
application which are limited to electrical use which include
means to mount an electrical device within the envelope.
Subclass:
253
This subclass is indented under subclass 252. Discharge
devices which have at least one of the supporting wires,
rods, or tubes supported by a part of the envelope wall which
is opposite to or spaced at a distance from the part of the
envelope wall which supports either a different portion of
the same support wire, rod or tube or another supporting
wire, rod or tube.
(1) Note. This and the indented subclasses do not include
discharge devices where all the supporting rods, wires or
tubes are sealed into a common stem or press of the envelope
even though the support wires, rods or tubes are widely
spaced from each other.
(2) Note. One of the common type structures found in this
and the indented subclasses is the so-called "multiple ended"
discharge devices, that is discharge devices having a stem or
press at each end of a substantially tubular envelope, a
support wire, rod, or tube being supported by each of the
stems or presses.
(3) Note. The support wires, rods or tubes which are
supported by the opposed parts of the envelope may support
the same electrode or different electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247 where the envelope wall includes a hollow conductive
part which is designed for use as an electrode, other
electrodes being supported within the envelope by means of
one or more support wires, rods or tubes which are supported
by the opposed end closures of the hollow electrode.
274 for devices under the class definition having a filament
enclosed within an envelope, the filament being supported by
supporting means which are supported by opposed or spaced
parts of the envelope.
286 for devices under the class definition having an
electrode enclosed within an envelope, the electrode being
supported by one or more support rods, wires or tubes which
are supported by opposed parts of the envelope wall.
Subclass:
254
This subclass is indented under subclass 253. Discharge
devices wherein electrode support wires, rods or tubes are
supported by three or more opposed or spaced parts of the
envelope wall.
Subclass:
255
This subclass is indented under subclass 253. Discharge
devices which have the support wire, rod or tube which
supports an electrode supported by a plurality of spaced or
opposed parts of the envelope, or which have an electrode
supported by a plurality of support wires, rods or tubes,
different ones of the support wires, rods or tubes being
supported by different opposed or spaced parts of the
envelope.
(1) Note. This subclass provides for the patents for the
discharge devices where the support structure for a plurality
of electrodes is claimed, at least one electrode being
supported by a support wire, rod or tube which is supported
by opposed or spaced parts of the envelope. Where the
discharge device has one electrode supported by support
wires, rods or tubes which are supported by only one portion
of the envelope, and another electrode supported by support
wires, rods or tubes which are supported only by an opposed
or spaced part of the envelope, the patent will be classified
in subclass 253 or subclass 254.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247 where the envelope wall includes a hollow conductive
part which is designed for use as an electrode, another
electrode being supported by means of one or more support
wires, rods or tubes which are supported by the opposed end
closures of the hollow electrode.
Subclass:
256
This subclass is indented under subclass 252. Discharge
devices where the supporting structure is a rod or tube made
of insulating or ceramic material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257 for discharge devices under subclass 252 which have a
spacing structure which includes an insulating or ceramic
member between the electrodes or electrode supports, or
between one or more electrodes or electrode supports and the
envelope wall. See subclass 262 where the spacing structure
includes a ceramic (e.g., glass) bead.
289 for devices under the class definition which have and
envelope and a supporting rod or tube which is formed of
insulating or ceramic material for supporting the electrode
of the device.
Subclass:
257
This subclass is indented under subclass 252. Discharge
devices which have a spacer member interposed between
different electrodes or different electrode supports.
(1) Note. For the definition of "spacer" see (2) Note to
the definition of subclass 238.
SEE OR SEARCH THIS CLASS, SUBCLASS:
241 where the discharge device has a spacer member and a
shielding member extending across the ends of a plurality of
electrodes.
250 where the discharge device has an elongated envelope and
the electrodes are supported along the longitudinal axis of
the envelope, a spacer member being interposed between
different electrodes or different electrode supports.
255 where the discharge device is a double ended device,
that is it has an electrode supported by support wires, rods
or tubes which are supported at both of two opposed or spaced
parts of the envelope.
268 for discharge devices which are not enclosed within an
envelope which have a spacer member interposed between the
electrodes.
285 for devices under the class definition which have an
electrode supported by means of a plurality of support wires,
rods or tubes within an envelope, a spacer member being
interposed between at least two of the support wires, rods or
tubes or between the electrode or the electrode support and
the envelope. See subclass 288 where the spacer is between
the envelope and the electrode or support.
292 for miscellaneous supporting and spacing elements, per
se.
Subclass:
258
This subclass is indented under subclass 257. Discharge
devices having a spacer member interposed between the
envelope of the discharge device and an electrode or an
electrode support.
(1) Note. The spacer member which engages the envelope may
be the same spacer member which it interposed between the
different electrodes or electrode supports, or it may be a
spacer member in addition to the inter-electrode or
inter-electrode support spacer.
SEE OR SEARCH THIS CLASS, SUBCLASS:
288 for devices under the class definition which have an
envelope and an electrode within the envelope supported by a
wire, rod or tube which is supported by the envelope, a
spacer member being interposed between the envelope and the
electrode or electrode support.
Subclass:
259
This subclass is indented under subclass 257. Discharge
devices in which the spacing member is formed by an
insulating coating.
(1) Note. In some of the discharge devices in this
subclass, an electrode or electrode support is coated with an
insulating coating, and another electrode is wound upon or
coiled about the electrode or electrode support, the
insulating coating spacing and insulating the electrode from
the supporting electrode or electrode support.
(2) Note. This subclass includes devices where the spacer
member is formed of conductive material provided with an
insulating coating so that the electrodes will be spaced and
insulated from each other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
355 for the structure of electrodes which have a coating
thereon.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, appropriate
subclasses for a stock material product (in the form of a
single or plural layer web, sheet, rod, fiber or filament),
and especially 375 for electrodes for lamps and discharge
devices which involve no more than a base with a coating
thereon.
Subclass:
260
This subclass is indented under subclass 257. Discharge
devices having the electrodes mounted in side by side,
concentric or co-axial relation, one end of the electrodes
being positioned in substantially co-planar relation, an
electrode spacer having the form of a plate or bar mounted in
contact with the electrodes or electrode supports to maintain
the electrodes in spaced relation with each other, the plate
or bar extending across the ends of the electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
241 where the discharge device is also provided with a
shield member which extends across the ends of the
electrodes.
255 where the electrode supports are supported by both of
two opposed or spaced parts of the envelope (e.g., double
ended discharge devices).
Subclass:
261
This subclass is indented under subclass 260. Discharge
devices having a plate or bar electrode spacer which extends
across the ends of the electrodes at each of the opposite
ends of the electrodes.
Subclass:
262
This subclass is indented under subclass 257. Discharge
devices having a plurality of the wires, rods or tubes which
support the electrodes from the envelope wall joined to an
insulating or ceramic bead, or which have a plurality of
wires or rods attached to different electrodes and joined to
an insulating or ceramic bead so that the wires or rods and
the bead serve to maintain one electrode in spaced relation
to another.
SEE OR SEARCH THIS CLASS, SUBCLASS:
256 for discharge devices under subclass 252, which have an
insulating or ceramic supporting rod or tube which supports
the electrodes and is supported by the envelope, a plurality
of electrodes having wires or rods attached to them, the
wires or rods being joined to the insulating or ceramic
support rod so as to space one electrode from another.
Subclass:
263
This subclass is indented under subclass 252. Discharge
devices having supporting means for an indirectly heated
cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
260 where the discharge device has a plurality of electrodes
including an indirectly heated cathode mounted in side by
side, co-axial, or concentric relation, one end of the
electrodes being positioned in substantially coplanar
relation, a plate or bar electrode spacer extending across
the ends of the electrodes. See subclass 261 where the
discharge device has a plate or bar electrode spacer at each
end of the electrode assembly.
270 for other supporting structure for indirectly heated
cathodes.
Subclass:
264
This subclass is indented under subclass 252. Discharge
devices having supporting means for a U-shaped, V-shaped or
plural section filament.
(1) Note. W-shaped filaments are included as V-shaped
filaments.
(2) Note. A plural section filament is a filament which is
composed of a plurality of filament wires connected to common
leading-in wires. The plurality of filaments may be
connected to the leading-in wires so that the filament
sections are electrically connected in parallel, or a
filament section may be connected to a leading-in wire and a
conductive support, another filament section being connected
to the same conductive support and another leading-in wire so
that the filament sections are electrically connected in
series.
SEE OR SEARCH THIS CLASS, SUBCLASS:
260 where the discharge device has a plurality of electrodes
including a U-shaped, V-shaped or plural section filament
mounted in side by side, co-axial or concentric relation, one
end of the electrodes being positioned in substantially
co-planar relation, a plate or bar electrode spacer extending
across the ends of the electrodes. See subclass 261 where
the device has a plate or bar electrode spacer at each end of
the electrode assembly.
271 for other devices under the class definition which have
supporting structure for filaments.
Subclass:
265
This subclass is indented under subclass 252. Miscellaneous
discharge devices having a foraminous or grid electrode
supported between two other electrodes.
(1) Note. As this is the miscellaneous subclass under
subclass 252 where the discharge device is provided with a
grid or apertured electrode, cross-references of disclosures
classified either as original copies or cross-reference
copies in subclass 253 to 264 are not placed in this
subclass.
(2) Note. In some of the devices in this subclass the
foraminous or grid electrode is intended to be used to
control the discharge between the anode and cathode of the
discharge device. In other of the devices, the interposed
foraminous or grid-like electrode is intended to be used as
an anode in the discharge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
241 where the discharge device is provided with a plurality
of discharge electrodes which are mounted in side by side,
coaxial or concentric relation, an end of the electrodes
being located in substantially coplanar relation, a shield
electrode extending across the ends of the electrodes.
245 where the discharge device includes four or more
electrodes which are arranged to form at least two different
discharge spaces, one of the discharge spaces having a
foraminous or grid electrode mounted therein.
247 for this subject matter where the envelope of the
discharge device is formed of metal or conductive material,
the hollow metal or conductive portion of the envelope being
designed for use as an electrode of the discharge device, and
having a foraminous or grid electrode supported by the end
closure of the hollow metal or conductive envelope portion.
248 where the envelope of the discharge device is made of
metal or conductive material, and a plurality of electrodes,
including a foraminous or grid electrode, are supported by
the metallic or conductive envelope wall.
249 for this subject matter where the discharge device
envelope is elongated, and a plurality of electrodes,
including a foraminous or grid electrode, are supported in
spaced relation along the longitudinal axis of the envelope.
253 through 264, see (1) Note, above.
293 for patents for discharge devices within the class
definition which have a foraminous or grid electrode
interposed between two other electrodes and where no
significant supporting and/or spacing structure for the
electrodes is claimed.
348 for the structure of foraminous or grid electrodes, per
se.
Subclass:
266
This subclass is indented under subclass 252. Devices which
have the structure of the envelope part or the envelope stem
or press which supports the electrode supporting wire, rod or
tube modified.
(1) Note. This subclass includes patents where significant
structure of the envelope part, stem or press which supports
the electrode supporting wire, rod or tube is claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
242 where the discharge device has a shield supported by or
forming part of the envelope stem.
246 for discharge devices under subclass 243 which have at
least a portion of the envelope wall formed of metal or
conductive material, the metallic or conductive portion being
designed for use as an electrode, means being provided to
support an electrode within the discharge device.
248 for discharge devices under subclass 243 which have have
at least a part of the envelope wall formed of metal or
conductive material, a plurality of electrodes being
supported by the metallic or conductive wall of the
envelope.
271 for devices under subclass 238 where the device has an
envelope and a filament supported within the envelope, the
structure of the envelope part or the envelope stem or press
which supports the electrode supporting structure being
modified.
290 for miscellaneous devices under subclass 238 where the
device has an envelope and an electrode supported within the
envelope, the structure of the envelope part or the envelope
stem or press which supports the electrode supporting
structure being modified.
317 and the classes and subclasses specified in the notes to
the definition of those subclasses for the structure of
envelopes for discharge devices and electric lamps.
626 for gas or vapor type discharge devices which have a
shield (where may be a part of the envelope wall, stem or
press) for an electrode support.
Subclass:
267
This subclass is indented under subclass 243. Discharge
devices having means for supporting and/or spacing a
plurality of rod-like electrodes.
(1) Note. This subclass includes arc lamps and similar
discharge devices which are provided with a plurality of
rod-like electrodes and which are usually intended to have
the arc or other discharge maintained between the ends of the
electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for patents claiming the structure for supporting only a
single rod electrode of a discharge device.
325 for patents claiming electric discharge devices having
rod-like electrodes where no significant supporting and/or
spacing structure is claimed.
357 and the subclasses specified in the notes to the
definition of that subclass for the structure of rod
electrodes, per se.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices, Consumable
Electrodes, appropriate subclasses for discharge devices of
the consumable electrode type (e.g., arc lamps and similar
devices having means for feeding the electrodes together as
they are consumed) which have supporting and/or spacing
structure for a plurality of rod-like electrodes.
Subclass:
268
This subclass is indented under subclass 243. Miscellaneous
discharge devices which have an insulating spacer member
interposed between two of the discharge electrodes.
(1) Note. For the definition of "spacer", see (2) Note to
the definition of subclass 238.
SEE OR SEARCH THIS CLASS, SUBCLASS:
246 for discharge devices which have a tubular envelope
portion of insulating material, the ends of the tubular
member having closures of conductive material which are
designed for use as electrodes of the discharge device, the
electrodes and the insulating tubular portion forming the
envelope of the discharge device.
257 and the subclasses specified in the notes to the
definition of those subclasses for discharge devices which
are provided with an envelope and which have an insulating
spacer interposed between two discharge electrodes or their
supports, the electrodes being supported by support wires,
rods or tubes within the envelope.
Subclass:
269
This subclass is indented under subclass 238. Devices which
have in addition to the supporting and/or spacing structure
for the electrodes, means to damp mechanical vibrations of an
electrode or an electrode support.
(1) Note. The means provided is sometimes a weight mounted
upon the electrode or electrode support so as to give the
electrode a greater mass so that the vibrations are damped.
(2) Note. Where the vibration damping means involves only
the structure of the electrode or the electrode supporting
means, such as providing either rigid or resilient supporting
means or making the electrode or its support of a specific
shape, the patent is not classified in this subclass, but
will be found in subclass 238 or one of the other subclasses
indented under subclass 238.
SEE OR SEARCH THIS CLASS, SUBCLASS:
50 for devices under the class definition which are provided
with a detachable electric connector (e.g., socket) or
support which includes resilient supporting means for the
lamp or discharge device or which is provided with vibration
damping means.
SEE OR SEARCH CLASS:
188, Brakes, for miscellaneous means for retarding the motion
of moving mechanism by friction, by positive engagement of
elements or by the internal resistance of a fluid or a field
of force. See especially 378 for structures which include a
weight designed for attachment to a moving member to damp the
vibrations of the member.
248, Supports, 560 for miscellaneous resilient supports.
Subclass:
270
This subclass is indented under subclass 238. Devices which
have supporting and/or spacing structure for an indirectly
heated cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
263 and the subclasses specified in the notes thereto where
the device is a discharge device which has a plurality of
electrodes including an indirectly heated cathode supported
by support structure within an envelope.
310 and the subclasses specified in the notes to the
definition of that subclass for discharge devices which have
an indirectly heated cathode.
337 for the structure of indirectly heated cathodes, per
se.
Subclass:
271
This subclass is indented under subclass 238. Devices which
have supporting and/or spacing structure for a filament.
(1) Note. Many of the patents in this and the indented
subclasses are patents for incandescent lamps. Where only
the supporting and spacing structure for an incandescent lamp
filament is disclosed and claimed, the patent is classified
in this or one of the indented subclasses and is not
cross-referenced into any of the subclasses below this or the
indented subclasses. Where novel structure in addition to
the mere filament supporting and/or spacing structure is
disclosed or claimed, appropriate cross-references are made.
SEE OR SEARCH THIS CLASS, SUBCLASS:
244 for discharge devices under subclass 238 which have an
envelope and a plurality of electrodes, one of which is a
filament supported within the envelope.
315 for miscellaneous incandescent lamps. Patents claiming
incandescent lamps but which do not claim any significant
supporting and/or spacing structure for the lamp filament are
classified in subclasses 315+ or in one of the subclasses
specified in the notes to the definition of that subclass.
SEE OR SEARCH CLASS:
248, Supports, 49 for miscellaneous pipe or cable supports.
Subclass:
272
This subclass is indented under subclass 271. Devices having
supporting and/or spacing structure for a plurality of
filaments at least two of which are separately energizable.
(1) Note. Where the device has a plurality of filaments all
of which are connected to the same lead-in wires so that all
of the filaments must be energized together, the structure is
considered to be supporting and/or spacing structure for a
plural section filament and classified in subclass 273.
SEE OR SEARCH THIS CLASS, SUBCLASS:
245 for discharge devices under subclass 238 which have
means for supporting and/or spacing a plurality of electrodes
which form a plurality of separate discharge spaces, at least
two of which are emissive filaments.
273 see (1) Notes, above.
306 and the subclasses specified in the notes to the
definition of that subclass for discharge devices under the
class definition which have a plurality of emissive filaments
and which do not include any significant supporting and/or
spacing structure for the electrodes.
316 for incandescent lamps which have a plurality of
separately energized filaments which do not involve any
significant supporting and/or spacing structure for the
filaments.
Subclass:
273
This subclass is indented under subclass 271. Devices having
supporting and/or spacing structure for a plural section
filament.
(1) Note. A plural section filament is a filament which is
composed of a plurality of filament wires connected to common
leading-in wires. The plurality of filaments may be
connected to the leading-in wires so that the filament
sections are electrically connected in parallel, or a
filament section may be connected to a leading-in wire and a
conductive support, another filament section being connected
to the same conductive support and another leading-in wire so
that the filament sections are electrically connected in
series. One of the filament sections may have supports which
are separate from the supporting structure for another
filament section, the filaments being electrically connected
by leading-in wires which may or may not also be supports for
the filament sections.
SEE OR SEARCH THIS CLASS, SUBCLASS:
264 for discharge devices under subclass 238 having an
envelope and a plurality of electrodes including a plural
section filament supported within the envelope.
272 for devices under subclass 271 for supporting a
plurality of separately energizable filaments.
Subclass:
274
This subclass is indented under subclass 271. Devices which
have the filament within an envelope, the filament being
supported within the envelope by means of supports (e.g.,
support wires, rods, or tubes), at least one of the supports
being supported by a part of the envelope wall which is
opposed to or spaced at a distance from the part of the
envelope wall which supports either a different portion of
the same support or another support.
(1) Note. This and the indented subclass does not include
devices where all the supporting and/or spacing means are
sealed into a common stem or press of the envelope even
though the supporting and/or spacing means are widely spaced
from each other.
(2) Note. Some devices in this subclass have the lead-in
wires which pass through the envelope wall at the same end of
the envelope so that only a single base is needed for the
device.
(3) Note. One of the more common structures found in this
subclass is the so-called "multiple-ended" incandescent lamp,
that is, a lamp having a stem or press at each end of a
substantially tubular envelope, the filament supports being
supported by each of the stems or presses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
253 for discharge devices having an envelope and support
structure for a plurality of electrodes. The support
structure being supported by opposed or spaced portions of
the envelope. See subclass 255 where the same electrode is
supported by supports which are supported at spaced or
opposed portions of the envelope.
286 for other devices under subclass 238 which have an
envelope and an electrode therein, the electrode being
supported by means of supports (e.g., wires, rods or tubes)
which are supported by opposed or spaced parts of the
envelope wall.
288 and the subclasses specified in the notes to the
definition of this subclass for other devices under subclass
238 which have an envelope and an electrode therein, a spacer
member being positioned between the envelope wall and the
electrode or an electrode support.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 99
for conduits for electrical conductors which have interior
supports for supporting one or more electric conductors
therein.
Subclass:
275
This subclass is indented under subclass 271. Devices in
which the supporting structure for the filament includes an
electrically insulating member.
(1) Note. Including in this subclass are supporting
structures such as glass or ceramic rods having metal hooks
or anchors attached to it for supporting the filament. Also
included are supporting structures wherein, a glass bead is
mounted upon a metal supporting rod, the glass bead having
means for supporting the filament.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257 for discharge devices under subclass 238 which have an
envelope and a plurality of electrodes supported by supports,
within the envelope, an insulating spacer member being
interposed between a plurality of the electrodes or electrode
supports, a filament being supported by the insulating spacer
member.
289 for other devices under subclass 238 which have an
envelope and an electrode other than a filament supported by
means of an insulating or ceramic support rod or tube within
the envelope.
Subclass:
276
This subclass is indented under subclass 275. Devices which
have the insulating member which supports the filament
supported by an electrically conductive supporting member
(e.g., wire, rod or tube.)
(1) Note. The conductive wire, rod or tube may be used as
one of the lead-in wires for conducting electrical current to
the filament.
(2) Note. Among the structures found in this are devices
having an insulating plate or bar supported by a conductive
wire or rod, a filament being supported by the insulator.
Sometimes, the filament is V-shaped or W-shaped, and the
insulating rod is provided with means to engage and support
the filament at a plurality of points.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257 for discharge devices under subclass 238 which have an
envelope and a plurality of electrodes supported by
conductive supports within the envelope an insulating spacer
member being interposed between a plurality of the electrodes
or electrode supports, a filament being supported by the
insulating spacer member.
264 for discharge devices under subclass 238 which have an
envelope and a plurality of electrodes therein, the
supporting structure for the electrodes including means to
support a U-shaped, V-shaped or W-shaped filament.
285 for devices under subclass 238 which are provided with
an envelope and an electrode other than a filament, therein,
the electrode being supported by an intermediate supporting
member, such as an insulating plate, rod, or bead, the
intermediate member being supported by a conductive support.
Subclass:
277
This subclass is indented under subclass 275. Devices having
an insulating standard or rod which supports filament anchors
or brackets, the filament anchors or brackets engaging and
supporting the filament.
(1) Note. The devices in this and the indented subclass
include incandescent lamps which are provided with an
envelope have a stem, a glass or ceramic rod or standard
being supported by the stem, the rod or standard usually
being fused to or being integral with the stem, filament
supporting brackets or anchors being attached to the rod or
standard, usually by fusing the brackets or anchors to the
rod or standard, the filament being supported by the
supporting brackets.
SEE OR SEARCH THIS CLASS, SUBCLASS:
289 and the subclasses specified in the notes to the
definition of that subclass for other devices under subclass
238 which have an envelope and an electrode other than a
filament supported by an insulating or ceramic support rod
therein.
SEE OR SEARCH CLASS:
248, Supports, 65 for brackets for supporting pipe or
cables, subclasses 300+ for brackets formed of sheet
material, and subclasses 302+ for brackets formed of wire.
Subclass:
278
This subclass is indented under subclass 271. Devices which
include means to apply a tension force to the filament.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257 for discharge devices which are provided with an
envelope and a plurality of electrodes supported by supports
therein, a spacer member being interposed between the
electrodes or the electrode supports, a filament being
supported by tension applying means, the tension means being
supported by the spacing member.
284 for devices under subclass 238 which include an envelope
and an electrode supported by supporting means therein, the
supporting means being resilient or flexible.
Subclass:
279
This subclass is indented under subclass 271. Devices which
have supporting means which engage and support the filament
intermediate the ends of the filament.
SEE OR SEARCH THIS CLASS, SUBCLASS:
273 where the device includes means for supporting a plural
section filament, that is, a filament which is composed of a
plurality of separate sections of filament wire.
274 where the device includes an envelope, and the filament
supports are supported by opposed or spaced parts of the
envelope wall.
276 where the device has the filament supported by an
electrical insulating member, the insulating member being
supported by an electrically conductive wire, rod or tube.
277 for this subject matter where the device is provided
with an insulating standard or rod having a plurality of
filament anchors or brackets supported by the rod or
standard, so that the filament is supported at one or more
intermediate points.
278 for this subject matter where the support which engages
the intermediate portion of the filament includes means for
maintaining the filament under a tension force.
Subclass:
281
This subclass is indented under subclass 238. Devices which
have the support for the electrode mounted in or around an
aperture in a conductive wall or plate.
(1) Note. In some of the devices in this subclass, the
support for the electrode or the electrode is intended to
pass through the conductive wall or plate. In other devices,
the electrode supporting means surrounds an aperture in the
conductive wall or plate and the electrode is located in the
same side of the wall or plate as the supporting means, the
aperture being provided so that the electrode may cooperate
through the aperture with other means located upon the
opposite side of the wall or plate.
(2) Note. Neither the electrode nor its supporting means
need necessarily be insulated from the conductive wall or
plate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
282 and the subclasses specified in the notes to the
definition of that subclass for devices under subclass 238
which have an envelope which has a portion of the wall made
of metal or conductive material and an electrode, the
electrode being supported by the conductive wall portion or
being supported by means of a support which is supported by
the conductive wall portion.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 151 for
devices for insulating a conductor from a wall or plate
through which the conductor extends.
Subclass:
282
This subclass is indented under subclass 238. Devices which
have an envelope and an electrode, at least part of the
envelope formed of electrically conductive material, either
the electrode being supported by the conductive portion of
the envelope wall or having the electrode supported by
supporting means which is supported by the conductive portion
of the envelope wall.
SEE OR SEARCH THIS CLASS, SUBCLASS:
239 where the device is enclosed within an envelope which
has an electrically conducting envelope wall portion, the
wall portion being disclosed or claimed as being a shield.
246 where the devices is a discharge device and the
conductive envelope wall portion is disclosed or claimed as
being an electrode of the device, the supporting and/or
spacing structure for a plurality of electrodes which are
supported by the conductive wall portion being claimed.
248 where the devices is a discharge device having a
conductive envelope wall portion which is not disclosed or
claimed as being either a shield or an electrode and the
supporting and/or spacing structure for a plurality of
electrodes which are supported by the conductive wall portion
is claimed.
281 where the device has a conductive envelope portion which
is provided with an aperture an electrode being mounted in or
around the aperture.
SEE OR SEARCH CLASS:
220, Receptacles, subclass 2.3 for envelopes, per se, which
have conductive wall portions.
Subclass:
283
This subclass is indented under subclass 238. Devices which
have an envelope, the electrode being supported by the
envelope.
(1) Note. The electrode need not be supported directly upon
the envelope, but may be supported upon support rods or other
support members which are supported by the enclosing
envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
239 for devices under subclass 238 which have an envelope
and a shield enclosed by the envelope, the shield being
supported by the envelope.
244 for this subject matter where the device is a discharge
device and a plurality of electrodes are supported by the
envelope.
269 for this subject matter where the device includes a
vibration damping means for damping vibrations of the
electrode or electrode support.
270 for this subject matter where the electrode is an
indirectly heated cathode.
271 for this subject matter where the electrode is a
filament.
281 where the envelope has a conductive wall portion with an
aperture in it, the electrode support being mounted in or
around the aperture.
282 where the envelope is provided with a conductive wall
portion, this electrode being supported by the conductive
wall portion.
Subclass:
284
This subclass is indented under subclass 283. Devices which
have the electrode supported by a supporting member which is
supported by the envelope.
(1) Note. In the devices of this and the indented
subclasses, the electrode is supported within the envelope by
means of supporting member, the supporting member being
attached to and supported by the envelope.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 50.54
for miscellaneous hermetically sealed envelopes of general
application which are limited to electrical use which include
means to mount an electrical device within the envelope.
Subclass:
285
This subclass is indented under subclass 284. Devices having
the electrode supported by a supporting wire, rod, or tube,
which is supported by the envelope.
(1) Note. The supporting wire, rod or tube is sometimes
sealed into the stem or press of the envelope and is usually
used as the lead-in wire for the electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
252 and the subclasses specified in the notes thereto where
the device is a discharge device having a plurality of
electrodes supported by the envelope.
271 and the subclasses specified in the notes thereto where
the electrode which is supported is a filament.
282 where the envelope is provided with a metallic or
conductive part, the support wire, rod or tube being
supported by the metallic or conductive part of the
envelope.
Subclass:
286
This subclass is indented under subclass 285. Devices which
have (1) the electrode supported by a plurality of support
wires, rods or tubes at least one of the support wires, rods,
or tubes being supported by a part of the envelope wall which
is opposite to or spaced at a distance from the part of the
envelope wall which supports another of the supporting wires,
rods or tubes, or (2) which have at least one of the
supporting wires, rods or tubes for the electrode supported
by a part of the envelope wall which is opposite to or spaced
at a distance from the part of the envelope wall which
supports a different portion of the support wire, rod or
tube.
(1) Note. This subclass does not include devices where all
the support rods, wires or tubes are sealed into a common
stem or press of the envelope even though the support wires,
rods or tubes are widely spaced from each other.
(2) Note. One of the common types of structures found in
this and the indented subclasses is the so-called "multiple
ended" devices, that is devices having a stem or press at
each end of a substantially tubular envelope, an electrode
support wire, rod, or tube being supported by each of the
stems or presses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
255 where the device is a discharge device having a
plurality of electrodes, at least one of the electrodes being
supported by support wires, rods or tubes which are supported
by spaced or opposed parts of the envelope wall.
274 where the electrode supported by the support wires, rods
or tubes is a filament.
318.01 for a device within the class definition which is
provided with an envelope, the device having at least a base
and an electrical connector attached to spaced or opposed
parts of the envelope.
318.12 for a device within the class definition having an
envelope and an electrical connector attached to spaced or
opposed parts of the envelope
Subclass:
287
This subclass is indented under subclass 285. Devices in
which the envelope has a stem or press, the support wire, rod
or tube being attached to and supported by a ring shaped
clamping member or collar, the ring shaped member or collar
being fastened about the stem or press.
Subclass:
288
This subclass is indented under subclass 285. Devices having
a spacer member interposed between the envelope of the
discharge device and an electrode or electrode support.
(1) Note. For the definition of spacer, see (2) note to the
definition of subclass 238.
SEE OR SEARCH THIS CLASS, SUBCLASS:
258 where the device is a discharge device having a
plurality of electrodes.
292 for miscellaneous spacing elements, per se.
Subclass:
289
This subclass is indented under subclass 285. Devices which
have the supporting rod or tube formed of insulating or
ceramic material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
256 for discharge devices which have a plurality of
electrodes enclosed within an envelope, an insulating or
ceramic electrode supporting rod being supported by the
envelope.
275 where the electrode supported is a filament.
Subclass:
290
This subclass is indented under subclass 285. Devices which
have the structure of the envelope part or the envelope stem
or press which supports the electrode supporting wire, rod or
tube modified.
(1) Note. This subclass includes patents where significant
structure of the envelope part, stem or press which supports
the electrode supporting wire, rod or tube is claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
266 where the device is a discharge device having a
plurality of electrodes supported by supporting wires, rods
or tubes.
271 where the electrode supported by the support wires, rods
or tubes is a filament.
281 where the envelope includes a conductive wall portion
having an aperture, the support being mounted in or around
the aperture in the conductive wall portion.
282 where the envelope is provided with a metallic or
conductive wall portion, the electrode support being attached
to the conductive wall portion.
317 and the classes specified in the notes to the definition
of those subclasses for the structure of envelopes for lamps
and discharge devices.
Subclass:
291
This subclass is indented under subclass 283. Devices in
which the electrode is a conductive coating upon the envelope
wall.
SEE OR SEARCH THIS CLASS, SUBCLASS:
355 and the subclasses specified in the notes thereto for
miscellaneous coated electrodes.
485 for devices under the class definition which have a
fluorescent or phosphorescent material coated upon the
envelope wall.
541 for photosensitive discharge devices which have the
cathode coated upon the envelope wall.
SEE OR SEARCH CLASS:
427, Coating Processes, 105 for processes of coating the
interior of hollow electrical articles.
428, Stock Material or Miscellaneous Articles, 34.1 for a
tube or conduct type of article which may have a coating on
the internal wall thereof.
Subclass:
292
This subclass is indented under subclass 238. Miscellaneous
supporting and spacing elements which are not classified in
any other class and which are designed for use with the
devices.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 138
for miscellaneous supports and spacing members which are made
of insulating material.
248, Supports, appropriate subclasses, for miscellaneous
supports.
Subclass:
293
This subclass is indented under the class definition.
Discharge devices which are provided with three or more
electrodes, at least one of the electrodes being an apertured
or grid-like electrode, the apertured or grid-like electrode
being interposed between two of the other electrodes so that
a straight line drawn between the two other electrodes will
pass through the apertured or grid-like electrode.
(1) Note. The apertured or grid-like electrode may be
formed of open work material such as wire mesh or perforated
sheet material, or may be formed of wires or bars, such as
coiled wire or otherwise provided with one or more openings
in the wall of the electrode.
(2) Note. To be classified in this subclass the claims must
state that the grid electrode is interposed between two other
electrodes. Where a patent claims only that the discharge
device includes a cathode, an anode, and a grid electrode,
the patent is excluded from this and the indented subclasses
and will be classified in subclass 308 or one of the
subclasses specified in the notes to the definitions of that
subclass.
(3) Note. In some of the devices in this and the indented
subclasses the foraminous or grid-like electrode is intended
to be used to control the discharge between the cathode and
anode of the discharge device. In other of the devices, the
interposed foraminous or grid-like electrode is intended to
be used as an anode in the discharge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 where the device includes a plurality of separate
discharge devices which are structurally combined to form a
single unitary device (e.g., multiple unit devices), one or
more of the discharge devices having an apertured or grid
electrode interposed in the discharge space between two of
the electrodes.
146 where the apertured or grid electrode is mounted so that
it is movable.
153 where the discharge device is also provided with a
magnetic device for influencing the space discharge.
167 where the discharge device has a liquid electrode.
238 for patents for discharge devices which include an
apertured or grid electrode interposed between two other
electrodes where significant supporting and/or spacing
structure for the electrodes is claimed. Where the claims
include significant supporting and/or spacing structure for
the electrodes, the patent is classified in subclasses 238+
and cross-referenced to this or one of the indented
subclasses when structure in addition to the supporting
and/or spacing structure for the electrodes is claimed or
disclosed. See especially indented subclass 265.
308 and the subclasses specified in the notes to the
definition of that subclass for other discharge devices which
are provided with a discharge control electrode. Also see
note 2 above.
325 for discharge devices provided with an electrode which
is formed of nonforaminous material which is permeable to
electrons.
326 for electrode structures which have only a single
aperture.
348 for the structure of foraminous and grid-like
electrodes, per se.
356 for the structure of tubular and other hollow
sleeve-like electrodes.
441 and the subclasses specified in the notes thereto, for
cathode ray devices which have an apertured electrode
interposed between the cathode and the target for
concentrating, shaping, accelerating, or decelerating the
cathode-ray beam.
537 for photosensitive discharge devices which have an
apertured or grid electrode interposed between two other
electrodes.
597 and the subclasses specified in the notes thereto where
the discharge device is provided with an envelope containing
an atmosphere of gas or vapor.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclasses
33-63 for discharge devices which have a grid or other
apertured electrode interposed in the discharge space between
two electrodes and which also have a circuit element (e.g.,
inductance switch, resistor) structurally combined with the
discharge device so as to form a unitary device. See
subclass 34 where the discharge device includes an antenna,
subclasses 35+ where the structural combination includes a
plurality of such discharge devices and a circuit element,
subclass 39 where the discharge device includes a wave guide,
coaxial cable or resonate parallel wire transmission line,
subclass 39.63 where the discharge device has an electrode
formed so as to provide a structure having distributed
inductance and capacitance, and operable in a magnetic field
(e.g., magnetrons), subclasses 41+ where the discharge device
has an inductive impedance connected between the electrodes,
51+, where the discharge device has structurally combined
therewith an electric generator or piezo-electric device, and
subclasses 56+ for the miscellaneous discharge devices which
have an apertured or grid electrode interposed in a discharge
space between two other electrodes and which have a circuit
element structurally combined therewith.
Subclass:
294
This subclass is indented under subclass 293. Discharge
devices which have a foraminous or grid-like electrode
interposed in the inter-electrode space and spaced form one
of the other electrodes so that different parts of the
foraminous or grid-like electrode are at different distances
from such other electrode.
(1) Note. The foraminous or grid electrode may be uniformly
spaced from one of the other electrodes, the second of the
other electrodes begin nonuniformly spaced from the
foraminous or grid electrode and from the other electrode.
This subclass includes discharge devices where the foraminous
or grid electrode is eccentrically spaced in the space
between the cathode and anode, and discharge devices where
the foraminous or grid-like electrode is spaced in parallel
relationship with the cathode and anode but has a different
cross-section configuration from that of the cathode or anode
(e.g., where the anode is circular and concentric with the
cathode, the grid electrode being oval in cross-section).
(2) Note. Some of the devices in this subclass are intended
to be used as variable-mu discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
349 for structure of foraminous and grid-like electrodes
where the electrode wall surface which is provided with the
openings does not form a straight hollow sleeve and is of a
nonstraight surface configuration with the openings in the
electrode lying in at least two different planes, and for the
structure of foraminous and grid-like electrodes having the
wall surface of the electrode which contains the openings in
the form of a hollow sleeve, the sleeve having a
cross-sectional area at one region of the electrode, which is
different from the cross-sectional area at another region of
the electrode, such as electrodes which are in the form of a
truncated cone, sphere, or which are barrel shaped or
hour-glass shaped.
Subclass:
295
This subclass is indented under subclass 293. Discharge
devices which have a foraminous or grid-like electrode
interposed in the inter-electrode space, the foraminous or
grid-like electrode having the ratio of area of free passage
through the openings in the electrode to the obturating area
of the electrode in one region different from such ratio in
another region of the electrode.
(1) Note. This subclass includes discharge devices having a
foraminous or grid-like electrode interposed between two
other electrodes where the foraminous or grid-like electrode
has at least one opening in the electrode of a different area
from the area of another of the openings, or where the
openings in the electrode are nonuniformly spaced with
respect to each other, or where the electrode is formed of a
wire coil or helix which has a nonuniform pitch for the turns
of the coil or helix.
(2) Note. Some of the devices in this subclass are intended
to be used as variable-mu discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
349 for foraminous and grid-like electrodes which have a
ratio of free passage area to obturating area in one region
of the electrode which is different from such ration in
another region of the electrode.
Subclass:
296
This subclass is indented under subclass 293. Discharge
devices which have a plurality of apertured or grid-like
electrodes interposed in the inter-electrode space defined by
other electrodes.
Subclass:
297
This subclass is indented under subclass 296. Discharge
devices having a plurality of apertured or grid-like
electrodes interposed in superimposed relation with respect
to each other in the inter-electrode space so that a straight
line drawn between the electrodes which define the
inter-electrode space will pass through both of the apertured
or grid-like electrodes.
(1) Note. This subclass includes, for example, plural grid
discharge devices such as discharge devices provided with a
screen grid and a control grid, discharge devices with two
control grids, discharge devices with a control grid and a
suppressor grid, and discharge devices where one of the
apertured or grid-like electrodes is intended to be used as a
first anode and another apertured or grid-like electrode is
intended to be used as a control grid, one of the electrodes
defining the inter-electrode space being a second anode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
295 where one of the grid-like electrodes has the ratio of
area of free passage through the openings in the electrode to
the obturating area of the electrode different from such
ratio in another region of the electrode (e.g., variable-mu
discharge devices).
447 for cathode ray devices which have a plurality of
apertured or grid-like electrodes interposed between the
cathode and the target.
599 where the discharge device is provided with an envelope
containing an atmosphere of gas or vapor.
Subclass:
298
This subclass is indented under subclass 297. Discharge
devices which are provided with either a plurality of
separate cathode or a plurality of separate nonemissive
electrodes (e.g., anodes) in addition to the interposed
apertured or grid-like electrodes, so that the discharge
device has at least two separate inter-electrode spaces, at
least two apertured or grid-like electrodes being interposed
in one of the inter-electrode spaces in superimposed relation
with respect to each other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for plural unit discharge devices which have at least two
cathodes and an anode for each of the cathodes, at least one
of the discharge devices having a plurality of serially
arranged apertured or grid-like electrodes interposed in the
inter-electrode space.
301 for other discharge devices which are provided with a
plurality of inter-electrode spaces, at least two of the
inter-electrode spaces having an apertured or grid-like
electrode disposed therein, or at least one of the
inter-electrode spaces having a plurality of apertured or
grid-like electrodes in nonsuperimposed relation.
Subclass:
299
This subclass is indented under subclass 297. Discharge
devices where the openings in at least two of the apertured
or grid-like electrodes are located in aligned relation upon
a straight line drawn between the electrodes defining the
inter-electrode space so that the effective obstructing area
of such two apertured or grid-like electrodes to the space
discharge is not greater than the effective obstructing area
of either of the two foraminous or grid-like electrodes.
(1) Note. This subclass includes only patents as originals
which claim the aligned relationship of the openings in the
two apertured or grid-like electrodes. Only patents where
there is a definite statement in the specification that the
openings in the two apertured or grid-like electrodes are
aligned along a straight line are cross-referenced into this
subclass.
(2) Note. This subclass includes discharge devices of the
type known as beam power tubes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
409 for plural beam generators which may include control
electrons.
447 for control electrodes between the cathode and target.
Subclass:
300
This subclass is indented under subclass 297. Discharge
devices having three or more apertured or grid-like
electrodes interposed in superimposed relation with respect
to each other in the inter-electrode space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
447 for cathode-ray tubes which have three or more apertured
or grid-like electrodes interposed between the cathode and
target.
599 where the discharge device has an envelope containing an
atmosphere of gas or vapor
Subclass:
301
This subclass is indented under subclass 296. Discharge
devices which have either a plurality of separate cathodes or
a plurality of separate nonemissive electrodes (e.g., anodes)
in addition to the interposed apertured or grid-like
electrodes so that the discharge device has at least two
separate inter-electrode spaces.
(1) Note. In the discharge devices in this subclass there
may be a plurality of apertured or grid-like electrodes in
one of the inter-electrode spaces, the apertured or grid-like
electrodes being in nonsuperimposed relation, or there may be
only one apertured or grid-like electrode in each of the
inter-electrode spaces.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6 for plural unit discharge devices which have at least two
cathodes and a separate anode for each cathode there being an
apertured or grid-like electrode interposed in the discharge
space between each anode and cathode.
239 and 245, for discharge devices which include significant
supporting and/or spacing structure for a plurality of
discharge electrodes which form a plurality of separate
inter-electrode discharge spaces. See subclasses 239+ where
the device includes supporting and/or spacing structure for a
shield member which is interposed between two of the separate
discharge spaces.
245 see the reference to subclass 239 above.
296 for discharge devices having only one inter-electrode
discharge space and which have a plurality of apertured or
grid-like electrodes in the inter-electrode discharge space
in nonsuperimposed relation.
298 where at least one of the inter-electrode spaces
contains a plurality of apertured or grid-like electrodes in
superimposed relation with respect to each other.
302 and 303, for discharge devices having a plurality of
inter-electrode spaces, an apertured or grid-like electrode
being interposed in only one of the inter-electrode spaces.
See subclass 302 where the discharge device has a plurality
of cathodes, and subclass 303 where the discharge device has
a plurality of nonemissive electrodes (e.g., anodes).
597 where the discharge device has an envelope containing a
gas or vapor.
Subclass:
302
This subclass is indented under subclass 293. Discharge
devices which have a plurality of separate cathodes.
(1) Note. The discharge device may be provided with a
nonemissive electrode (e.g., anode) in addition to the
apertured or grid-like electrode so that the discharge device
has a plurality of separate inter-electrode spaces and the
apertured or grid-like electrode may be interposed in both of
the inter-electrode spaces or may be interposed in only one
of the inter-electrode spaces, or the discharge device may
have only a plurality of separate cathodes with the apertured
or grid-like electrode disposed in the space between two of
the cathodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for plural unit discharge devices which have at least two
cathodes and an anode for each cathode, one or more of the
inter-electrode spaces having an apertured or grid-like
electrode therein.
245 for discharge devices which have significant supporting
and/or spacing structure for a plurality of electrodes which
form a plurality of separate discharge spaces.
298 where the discharge device has a plurality of separate
discharge spaces with a plurality of superimposed apertured
or grid-like electrodes in at least one inter-electrode
space.
301 where the discharge device has a plurality of
inter-electrode spaces with a plurality of apertured or
grid-like electrodes interposed in the inter-electrode space
in nonsuperimposed relation.
306 and the subclasses specified in the notes thereto for
other discharge devices provided with a plurality of separate
cathodes.
409 for cathode ray tubes which have a plurality of cathodes
and an apertured or grid-like electrode interposed in the
space between one of the cathodes and the target.
597 where the discharge device has an envelope containing a
gas or vapor.
Subclass:
303
This subclass is indented under subclass 293. Discharge
devices which have a plurality of separate nonemissive
electrodes (e.g., anodes) in addition to the interposed
apertured or grid-like electrode.
(1) Note. In the discharge devices in this subclass which
have a plurality of anodes, the apertured or grid-like
electrode may be interposed in only one of the
inter-electrode spaces (e.g., the device having a triode
section and a diode section) or the apertured or grid-like
electrode may be interposed in a plurality of the
inter-electrode spaces.
(2) Note. This subclass includes discharge devices which
have a cathode, an anode, an apertured or grid-like electrode
interposed between the cathode and anode, and an electrode or
shield (e.g., shield grid) disposed outside of the
inter-electrode discharge space (e.g., having a shield grid
which surrounds a cylindrical anode).
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for plural unit discharge devices which have at least two
anodes and a cathode for each anode, one or more of the
inter-electrode spaces having an apertured or grid-like
electrode therein.
245 for discharge devices which include significant
supporting and/or spacing structure for a plurality of
discharge electrodes which form a plurality of separate
discharge spaces.
298 for this subject matter where the discharge device has a
plurality of apertured or grid-like electrodes interposed
between two other electrodes in superimposed relation with
respect to each other.
301 where the discharge device has a plurality of apertured
or grid-like electrodes, the discharge device having either
an apertured or grid-like electrode in each inter-electrode
space or a plurality of apertured or grid-like electrodes in
one discharge space in nonsuperimposed relation.
302 for discharge devices provided with a plurality of
cathodes and an apertured or grid-like electrode interposed
in one of the discharge spaces.
306 and the subclasses specified in the notes thereto for
other discharge devices provided with a plurality of anodes.
Subclass:
304
This subclass is indented under subclass 293. Discharge
devices which have a cathode which is composed of a plurality
of parallel sections, the apertured or grid-like electrode
being provided with a plurality of tubular parts, each
tubular part of the apertured or grid-like electrode
completely surrounding a different one of the parallel
sections of the cathode.
(1) Note. The tubular apertured or grid-like electrode
sometimes has the form of a figure 8 in cross-section, a
cathode section being disposed within each loop of the figure
8 with the cathode extending parallel to the longitudinal
axis of the tubular apertured or grid-like electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
264 for discharge devices which include significant
supporting and/or spacing structure for a plural section
filament.
302 for discharge devices having a plurality of separate
cathodes and a foraminous or grid-like electrode interposed
in the inter-electrode space.
Subclass:
305
This subclass is indented under the class definition.
Discharge devices which have an anode or target which is
designed to be heated by the electron bombardment form the
cathode.
(1) Note. This subclass includes discharge devices of the
cathanode type i.e., discharge devices which have an
electrode, known as the cathanode, which is the anode with
respect to a cathode which bombards it with electrons, the
electron bombardment being designed to heat the cathanode to
electron emission temperature so that another surface of the
cathanode will emit electrons to a third electrode which
serves as the anode for the cathode surface of the
cathanode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
8 for discharge devices which are provided with a separate
body which is not intended to be used as an electrode and
which is designed to be heated to incandescence by the space
discharge.
39 and 47, for discharge devices which are provided with
means for preventing the flow of heat away from an electrode.
See subclasses 39+ where the electrode is within an
envelope.
103 and the subclasses specified in the notes thereto for
discharge devices having an electrode which emits secondary
electrons when bombarded by primary electrons.
337 for the structure of indirectly heated cathodes, per
se.
347 for the structure of electrodes which are designed to be
incandescible upon electron bombardment.
464 for cathode-ray tubes having anodes or targets which are
designed to be heated to incandescence by the cathode beam.
588 for discharge devices which have an envelope and an
atmosphere of gas or vapor, the discharge device having two
electrodes between which an ionizing discharge is to be
maintained, the ionizing discharge being a source of
electrons for a discharge to a third electrode, the discharge
to the third electrode being nonionizing (electronic).
627 for discharge devices which contain a gas or vapor and
which have an electrode designed to be used alternately as a
cathode and as an anode when the discharge device is used
with alternating current, the electrode being designed to be
heated to electron emissive temperature by the ionic
bombardment. Also, 627+, for discharge devices containing an
atmosphere of gas or vapor which have an incandescible
anode.
Subclass:
306
This subclass is indented under the class definition.
Discharge devices which have three or more electrodes.
(1) Note. See the glossary in the class definition for the
definition of a three or more electrode discharge device.
(2) Note. This is a residual subclass and provides only for
discharge devices having three or more electrodes which are
not provided for in the subclasses above. The search should
include the subclasses providing for special types of
discharge devices where a specific type of discharge device
is involved. For example, secondary emissive discharge
devices (e.g., electron multipliers) having three or more
electrodes are classified in subclasses 103+ above and not
cross-referenced to this subclass. Where the discharge
device is provided for in some general subclass above, such
as subclasses 11+ (with temperature modifier), or subclasses
238+ (with support and/or spacing structure for electrode
and/or shield) and structure in addition to that provided for
in the general subclass being disclosed, and the patent is
not cross-referenced to a subclass providing for a special
type of discharge device, the patent is cross-referenced into
this subclass. The notes below refer to some of the
subclasses which specifically provide for three or more
electrode discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for plural unit discharge devices which have at least two
cathodes and an anode for each cathode.
103 and the subclasses specified in the notes thereto, for
discharge devices of the secondary emitter type (e.g.,
electron multiplier) which have three or more electrodes.
123 and 140, for spark plugs having 3 or more electrodes.
162 for discharge devices which have three or more
electrodes and a magnetic device for influencing the space
discharge.
166 167 through 169, 170+ and 172, for liquid (e.g., mercury)
electrode discharge devices having three or more electrodes.
See subclass 166 where one of the electrodes is external of
the envelope, 167 where one of the electrodes is an apertured
or grid-like electrode, 168 and 169, where a plurality of the
electrodes are anodes, 170+ where one of the electrodes is an
auxiliary starting electrode, and subclass 172 for liquid
electrode discharge devices which have two electrodes
immersed in the liquid electrode, the liquid electrode being
vaporized to initiate the discharge and to supply the gas or
vapor atmosphere in the device.
234 where the discharge device has one of the three or more
electrodes exterior to the envelope of the device.
236 for discharge devices which are provided with three or
more electrodes and means for selectively using the
electrodes so that the discharge device may be operated
without one of the electrodes being operated, one electrode
being substituted for the other when the first operated
electrode becomes defective.
238 for discharge devices which include supporting and/or
spacing structure for three or more electrodes. If structure
in addition to the electrode supporting and/or spacing
structure is disclosed or is claimed, the patent is
cross-referenced to this or one of the indented subclasses
where the discharge device has three or more electrodes if it
is not specifically provided for in a subclass other than
subclasses 238+ which precedes this subclass (306).
293 for discharge devices which have an apertured or
grid-like electrode interposed in the inter-electrode space
between two other electrodes.
305 for discharge devices which have an electrode designed
to act as a cathode with respect to one electrode and an
anode with respect to a cathode, the electrode being heated
by the bombardment of electrons from the cathode and emitting
electrons to the anode.
364 for cathode-ray tube having three or more electrodes.
531 for photosensitive discharge devices which have a
plurality of photosensitive electrodes.
540 for photosensitive discharge devices which have a
plurality of cathodes, at least one of which is not
photosensitive and 540, for photosensitive discharge devices
which have a plurality of anodes.
581 where the discharge device has an envelope which
contains a gas or vapor.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, 7 for consumable electrode discharge devices
(e.g., arc lamps and similar devices having means to feed the
electrodes together as they are consumed) where the structure
includes at least two cathodes each having a separate anode,
subclass 31 for polyphase A. C. type consumable electrode
type devices, subclass 33 where the consumable electrode
discharge device is provided with three or more series
connected electrodes, and subclasses 36+ for the consumable
electrode discharge devices which have a plurality of
cathodes or a plurality of anodes.
315, Electric Lamp and Discharge Devices: Systems, 5.16,
5.27, 5.28, and 5.39+ for cathode-ray tube circuits including
a plurality of hollow distributed parameter devices such as a
wave guide, cavity resonator, or co-axial line through or in
which the ray passes; and subclasses 34 to 63 for discharge
devices which have three or more electrodes and which have
structurally combined therewith a circuit element such as an
electric switch or an impedance.
378, X-Ray or Gamma Ray Systems or Devices, subclass 124 and
134 for X-ray devices which have a plurality of cathodes or
anodes.
Subclass:
307
This subclass is indented under subclass 306. Discharge
devices which have four or more electrodes.
(1) Note. In some of the discharge devices in this
subclass, one or more of the electrodes are intended to be
used merely as discharge control electrodes.
(2) Note. This is a residual subclass and provides only for
discharge devices having four or more electrodes which are
not provided for in the subclasses above. The search should
include the subclasses above which provide for special types
of discharge devices where a specific type of discharge
device is involved. For example, secondary emissive
discharge devices (e.g., electron multipliers) having four or
more electrodes are classified in subclasses 103+ above and
not cross-referenced to this subclass. Where the discharge
device is provided for in some general subclass above, such
as subclasses 11+ (with temperature modifier), or subclasses
238+ (with support and/or spacing structure for electrode
and/or shield), and is not cross-referenced to a subclass
providing for a special type of discharge device, the patent
is cross-referenced into this subclass. The notes below refer
to some of the subclasses which specifically provide for four
or more electrode discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for plural unit discharge devices which have at least two
cathodes and an anode for each cathode.
103 and the subclasses specified in the notes thereto, for
discharge devices of the secondary emitter type (e.g.,
electron multiplier) which have four or more electrodes.
238 for discharge devices which include supporting and/or
spacing structure for three or more electrodes. If structure
in addition to the electrode supporting and/or spacing
structure is disclosed or is claimed, the patent is
cross-referenced to this subclass where the discharge device
has four or more electrodes if it is not specifically
provided for in a subclass other than subclasses 238+ which
precedes this subclass.
293 for discharge devices which have an apertured or
grid-like electrode interposed in the discharge space between
a cathode and another electrode (e.g., anode), a fourth
electrode being located outside of the discharge space (e.g.,
a shield grid around a cylindrical anode).
296 for discharge devices which have four or more
electrodes, at least two of the electrodes being apertured or
grid-like electrodes which are interposed in the
inter-electrode space defined by other electrodes.
364 for cathode-ray tube having four or more electrodes.
581 where the discharge device has an envelope which
contains a gas or vapor.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, subclass 7 for consumable electrode discharge
devices (e.g., arc lamps and similar devices having means to
feed the electrodes together as they are consumed) where the
structure includes at least two cathodes each having a
separate anode; subclass 33 where the consumable electrode
discharge device is provided with four or more series
connected electrodes and subclasses 36+ where the consumable
electrode discharge device has a plurality of cathodes or a
plurality of anodes and has four or more electrodes.
315, Electric Lamp and Discharge Devices: Systems, subclasses
34-63 for discharge devices which have four or more
electrodes and which have structurally combined therewith a
circuit element such as an electric switch or an impedance.
Subclass:
308
This subclass is indented under subclass 306. Discharge
devices which have a discharge control electrode.
(1) Note. This is the residual subclass providing for
discharge devices having three electrodes, one of the
electrodes being designated as a control electrode. As
pointed out in the glossary, a control electrode is an
electrode designed to influence or control the discharge
current flowing between other electrodes. Accordingly,
whether or not an electrode is a control electrode will
depend upon the system which is used with the discharge
device. The search should include the subclasses above which
provide for special types of discharge devices where a
specific type of discharge device is involved. For example,
secondary emissive discharge devices (e.g., electron
multipliers) having a control electrode are classified in
subclasses 103+ above. Where the control electrode is an
apertured or grid-like electrode interposed in the discharge
space between two other electrodes, the patent is classified
in subclasses 293+ above. Where the discharge device is
provided for in some general subclass above, such as
subclasses 11+ (with temperature modifier), or subclasses
238+ (with support and/or spacing structure for electrode
and/or shield), and is not cross-referenced to a subclass
providing for a special type of discharge device, the patent
is cross-referenced into this subclass. The notes below
refer to some of the subclasses which specifically provide
for four or more electrode discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for plural unit discharge devices (e.g., discharge devices
having at least two cathodes and an anode for each cathode)
at least one of the discharge devices having a control
electrode.
153 for discharge devices having a control electrode and
also a magnetic device for influencing the space discharge.
166 167 and 170+, for liquid electrode discharge devices
which are provided with a control electrode. See subclass
166 where the control electrode is external of the envelope
of the device; 167, where the control electrode is an
apertured or grid-like electrode interposed between the
cathode and anode and 170+, where the control electrode is an
auxiliary starting or holding electrode.
234 where the control electrode is exterior to the envelope
of the discharge device.
243 for discharge devices having significant supporting
and/or spacing structure for a plurality of electrodes, one
of which is a control electrode. If structure in addition to
the electrode supporting and/or spacing structure is
disclosed or claimed, the patent is cross-referenced to this
subclass where the discharge device has a control electrode
unless the device is specifically provided for in a subclass
other than subclasses 243+ which precedes this subclass.
293 where the control electrode is an apertured or grid-like
electrode interposed in the discharge space defined by two
other electrodes.
307 where the discharge device has four or more electrodes,
one of which is a control electrode.
447 and the subclasses specified in the notes thereto for
cathode-ray tubes which have a control electrode.
537 for photosensitive discharge devices which have a
control electrode.
581 where the discharge device has an envelope containing an
atmosphere of gas or vapor and a control electrode.
Subclass:
309
This subclass is indented under the class definition.
Discharge devices having an electrode which has a plurality
of pointed needle-like portions or which has a serrated
edge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
140 for this subject matter in spark plugs.
351 for the structure of multipointed or serrated edge
electrodes, per se.
Subclass:
310
This subclass is indented under the class definition.
Discharge devices which have a thermionic or emissive
cathode.
(1) Note. This subclass is the residual subclass providing
for discharge devices which have thermionic or emissive
cathodes which are not provided for in the above subclasses.
This subclass does not contain cross-references of devices
classified in the preceding subclasses where the sole novelty
in the cathode is in the structure or the cathode. For such
cross-references, see subclasses 337+ where the cathode is an
indirectly heated cathode, 341+, where the cathode is a
filament or resistance heated electrode, 346 for cathodes
which contain or are coated with electron emissive material.
This subclass does not contain cross-references of devices
classified in the preceding subclasses where the sole novelty
in the cathode is the composition of the cathode. For such
cross-references, see the classes referred to in the class
definition. Neither does this subclass contain
cross-references to patents where the sole novelty is in the
supporting and/or spacing structure for either the cathode or
the cathode and the other electrodes. The search should
include the subclasses above which provide for special types
of discharge devices where a specific type of discharge
device is involved. For example, cathode-ray tubes with
thermionic or emissive cathodes are classified in subclasses
364+ above. Where the discharge device is provided for in
some general subclass, such as subclasses 11+ (with
temperature modifier) and structure of the cathode is claimed
in addition to that provided for in either the general or
specific subclasses preceding this subclass, the patent is
cross-referenced into this subclass. See the search notes
below for a reference to some of the subclasses which provide
for discharge devices having a thermionic or emissive
cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for plural unit discharge devices which have at least two
cathodes and at least one anode for each cathode.
16 for discharge devices which have a liquid electrode and
an electric heater for the liquid electrode.
37 where the cathode is provided with means other than the
mere filament or heater for modifying the temperature of the
cathode (e.g., a heat shield).
103 for secondary emitter discharge devices (e.g., electron
multiplier) which have emissive cathodes.
163 for discharge devices which have a liquid (e.g., mercury
cathode) 616, 627+ and 630 for discharge devices which
contain a gas or vapor and which have a thermionic or
emissive cathode. See subclass 616 where the device is
provided with means to shield the cathode from positive ion
bombardment, subclasses 627+ where the device has a heated or
thermionic cathode, and subclass 630 for the miscellaneous
gas or vapor discharge devices with emissive cathodes.
233 for discharge devices which are defined by the degree of
vacuum and which include a thermionic or emissive cathode.
244 for discharge devices which are provided with means for
supporting and/or spacing a plurality of electrodes, one of
which may be a thermionic or emissive cathode. See (1) Note
above.
270 for discharge devices which are provided with means for
supporting and/or spacing an indirectly heated cathode. See
(1) Note above.
271 for devices having means for supporting and/or spacing a
filament. See (1) Note above.
293 for discharge devices which have a thermionic or
emissive cathode and other electrode and an apertured or
grid-like electrode interposed between the cathode and the
other electrode. See subclass 302 where the discharge device
has a plurality of cathodes and subclass 304 where the
discharge device is provided with a plural section cathode
having the cathode wires parallel to each other.
305 for discharge devices which have a cathode and other
electrode which is designed to be used as an anode with
respect to the first cathode and to be heated by the electron
bombardment from the first cathode, the electrode having
another surface which when heated emits electrons to a third
electrode, (e.g., cathanode type discharge device).
315 for incandescent lamps which have a filament or glower.
337 see (1) Note, above.
341 see (1) Note, above.
346 see (1) Note, above.
364 for cathode-ray tubes which have a thermionic or
emissive cathode. See subclass 409 where the cathode-ray
tube has a plurality of cathodes.
523 for photosensitive devices which have an emissive
cathode.
SEE OR SEARCH CLASS:
378, X-Ray or Gamma Ray Systems or Devices, 121 for X-ray
tubes which have a thermionic or emissive cathode.
Subclass:
311
This subclass is indented under the class definition.
Discharge devices which have an electrode defined by the
composition of which it is composed.
(1) Note. This subclass provides only for patents for
discharge devices but which specify that the device has an
electrode formed of a particular composition or material.
Electrode composition and materials are classified in Class
252, Compositions, subclasses 500+ or in one of the related
classes as pointed out in the class definition.
Consequently, patents disclosing electrode compositions and
materials for discharge devices are not cross-referenced into
this subclass solely for the composition or material, but are
cross-referenced in one of the classes specified in the class
definitions. However, this subclass does contain some
cross-references of patents where the electrode is specified
as being made of some well known material, such as brass or
zinc which is novel in its relationship in the discharge
device although the composition, per se, is not new. This
subclass is restricted to disclosures where there is some
significance in the use of the particular material or
composition in a discharge device.
(2) Note. This subclass includes patents either as
originals or cross-references for discharge devices which
specify that one electrode is composed of a specified
composition or material and another electrode is composed of
a specified composition or material and another electrode is
composed of a different composition.
(3) Note. The composition or material may be a coating upon
the electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
54 where the electrode includes a radio active material.
103 where the electrode includes a material which emits
secondary electrons when bombarded by primary electrons.
107 where the electrode includes a material which does not
emit secondary electrons when bombarded by primary
electrons.
150 and 163+, where the electrode is a liquid electrode
(e.g., mercury).
230 and 359.1+for discharge devices having an evacuated
envelope and an electrode which will emit positive ions.
483 where the electrode includes a fluorescent or
phosphorescent material.
523 where the electrode includes a photo-sensitive
material.
559 where the electrode includes a getter material or a
material designed to generate a gas or vapor within the
envelope of the device.
561 where the device has an envelope which contains a getter
or a gas or vapor generating material which is defined by its
composition and also has an electrode defined by its
composition.
627 and 630, where the device has an envelope containing a
gas or vapor and an electron emissive cathode. See
subclasses 627+ where the cathode is a heated or thermionic
cathode.
633 where the device is provided with an envelope containing
a gas or vapor and has an electrode defined by the
composition or material of which it is composed.
SEE OR SEARCH CLASS:
252, Compositions, see (1) Note, above.
Subclass:
312
This subclass is indented under the class definition.
Devices having envelopes and having a separable casing or
jacket surrounding the envelope or a portion thereof.
(1) Note. This subclass is the residual subclass providing
for lamps and discharge devices which have an envelope and a
separable casing or jacket surrounding the envelope or a
portion thereof and which are not provided for in specific
subclasses above. This subclass contains cross-references of
lamps and discharge devices classified in the preceding
subclasses which do not specifically provide for the
combination of a lamp or discharge device with an envelope
having a casing therefor. The structures of envelopes in
combination with a casing therefor are classified in other
classes as set forth in the class definition. Accordingly
the cross-references are placed in this subclass of lamps and
discharge devices which have envelopes and a casing therefor
only when there is some significance in the fact that the
device enclosed within the envelope is a lamp or discharge
device. To complete the search for this subject matter the
specific subclasses referred to in the notes below must be
searched.
(2) Note. This subclass does not provide for lamps or
discharge devices which have an integral double wall
envelope. For this excluded subject matter see subclasses
317+ below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17 where the lamp or discharge device is provided with an
envelope and has a casing or jacket for the envelope, the
space between the casing and the envelope being designed to
contain either a heat transfer medium, a heat insulating
medium or to be evacuated.
317 for envelopes which have double spaced walls. See (2)
Note, above.
324 for devices under the class definition which do not have
an envelope but which are provided with a casing or jacket
which is not gas tight and which wholly or partially
surrounds the device.
Subclass:
313
This subclass is indented under the class definition.
Devices provided with electrical shielding means or with
means for distributing the static charges which accumulate
upon the parts of the device or for the prevention of the
accumulation of static charges upon parts of the device or
for preventing undesired electric space discharges, such as
arcs, between the parts of the device.
(1) Note. For a definition of shield, see the glossary.
(2) Note. This subclass includes devices provided with
means to prevent the accumulation of undesired static
discharges upon the envelope of the device. This subclass
also includes devices provided with means to prevent electric
space discharges between the lead wires for the electrodes of
the device.
(3) Note. This is the residual subclass and provides for
all lamp and discharge devices which are not specifically
provided for in the preceding subclasses which have an
electrical shield or a static charge distribution means
combined therewith. Accordingly, cross-references have been
placed in this subclass of patents classified in the
preceding subclasses of lamps and discharge devices having an
electrical shield or static charge distribution means
excepting in the case where such patent is classified in a
specific subclass preceding this subclass which provides for
such subject matter. A complete field of search for this
subject matter will therefore include the subclasses set
forth in the notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 where the shield is a heated shield or is provided with
means for modifying the temperature of the shield (having a
heat radiating surface), see indented subclass 33 for devices
having an envelope and an internal temperature modifying
baffle, and subclass 38 for devices having a heat shield for
the filament or heated cathode.
134 for spark plugs having an electrical shield (e.g., radio
shielding).
168 for liquid electrode discharge devices (e.g., mercury)
which have the anodes shielded from each other by being
placed in separate chambers of the envelope.
169 for liquid electrode discharge devices having a
plurality of anodes with one or more anode arc shields.
590 592, 597+, 608, 609+, 614, 616, and 626, where the device
includes an envelope containing a gas or vapor. Where the
device is a discharge device having three or more electrodes
see subclasses 590, 592 and 597+. See subclass 590 where a
shield is interposed between two of the electrodes to prevent
a discharge therebetween, subclass 592 where there is a
hollow shield which surrounds at least a part of the
discharge path and which has an apertured or grid-like
electrode within the shield and subclasses 597+ where an
apertured or grid-like electrode (e.g., shield electrode) is
interposed between two other electrodes. See subclass 608
where a discharge device has particulate material between the
discharge electrodes, subclasses 609+ where a discharge
device has a partition, baffle, constricting means or a
portion of the envelope wall interposed in the discharge
space between the electrodes, subclass 614 for discharge
devices provided with an anode shield, subclass 616 for
discharge devices which are provided with a positive ion or
cathode shield, and subclass 626 for lamps and discharge
devices which have a shield for the electrode or an electrode
support.
239 where the device is provided with significant supporting
and/or spacing structure for the shield.
293 for discharge devices which have an apertured or
grid-like electrode (e.g., a shield electrode) interposed in
the discharge space between two electrodes, see subclass 293,
where the discharge device has in addition a fourth electrode
or shield disposed outside of the discharge space.
326 for the structure of shields, per se.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 35 for
miscellaneous electrical shields or screens, per se, and for
envelopes, boxes and housings which are of general utility
(including those similar to those used for electric lamps and
discharge devices) which are provided with or include as a
part thereof an electromagnetic or electrostatic shielding
means, subclasses 140+ for insulators provided with
conductive means to modify the electrical characteristics of
the insulator, including arcing horns, means for preventing
the concentration of electrical stresses, means for modifying
surface resistance, and grading means for modifying the
voltage gradient.
315, Electric Lamp and Discharge Devices: Systems, subclass
32 for electric lamps and space discharge devices which have
a condenser, inductance or other circuit element structurally
combined therewith so as to form a unitary device. Electric
lamps and discharge devices which are provided with a
condenser or other circuit impedance to modify the
distribution of electrostatic charges upon the parts of the
lamp or discharge device are in Class 315, subclasses 32+.
Note indented subclasses 58+ of Class 315 and the subclasses
specified in the notes to the definition of those subclasses
where a discharge device is structurally combined with a
condenser or other circuit impedance, and subclass 85 for
electrical systems for electric lamps and electric space
discharge devices having shielding means for part of the
system to prevent radiation of electromagnetic waves from
and/or to the system or some part thereof.
378, X-Ray or Gamma Ray Systems or Devices, subclass 139 for
X-ray discharge devices having electrostatic field stress
distributing means for increasing the impedance of the
dielectric paths between the electrodes and subclass 143 for
X-ray tubes having means for absorbing the secondary X-ray
radiation.
Subclass:
314
This subclass is indented under the class definition.
Devices which are provided with means for preventing the
repair of the device.
(1) Note. Some of the devices in this subclass are provided
with means to cause the envelope of the device to shatter
when an attempt is made to open the envelope for the purpose
of repairing or replacing the filament or other electrode.
Other of the devices are provided with means to prevent the
filament or other electrode from being attached to the lead
wires.
SEE OR SEARCH THIS CLASS, SUBCLASS:
236 for devices within the class definition which are
provided with a spare or extra electrode which is to be
substituted for a defective electrode.
237 for devices within the class definition which have an
envelope and parts which are especially designed so that the
device may be disassembled to repair an electrode or another
part of the device and for devices within the class
definition which are provided with means for replacing a
defective electrode.
SEE OR SEARCH CLASS:
220, Receptacles, 2.1, for envelopes, per se, for lamps and
discharge devices.
Subclass:
315
This subclass is indented under the class definition. Lamps
which are provided with a glower or filament adapted to be
heated to incandescence by the passage of an electric current
therethrough.
(1) Note. The glower or filament may be but need not be
contained within an enclosing envelope.
(2) Note. This is residual subclass and provides only for
incandescent lamps which are not specifically provided for in
the subclasses above. Where the incandescent lamp is
provided for in some general subclass above such as
subclasses 11+ (with temperature modifier), and is not
cross-referenced to a subclass specifically providing for
incandescent lamps and structure of the lamp is claimed in
addition to that provided for in either the general or
specific subclass, the patent is cross-referenced into this
subclass. The notes below refer to subclasses above which
specifically provide for incandescent lamps.
(3) Note. Where the only significant lamp structure recited
is the envelope, or the envelope and the base for the
envelope, the filament or light emitting body being recited
broadly or by name only, and where there is no relationship
recited between the filament or the light emitting body and
the envelope except that the filament or body is within the
envelope, the patent is classified in subclasses 317+. For
example, a claim directed to a particular shaped envelope
which states merely that there is a filament or light
emitting body within the envelope is classified in subclass
317. A claim which includes an envelope, either broadly or
specifically recited, and a base and which state merely that
the envelope contains a filament or light emitting body is
classified in subclasses 318.01+.
(4) Note. Where the only significant lamp structure recited
is the structure of the filament or glower with or without a
lead wire or connector, the claim merely stating that the
filament or glower is within or a part of an incandescent
lamp, the patent is classified in subclasses 326+, especially
in subclasses 341+. For example, a claim which recites an
incandescent lamp provided with a filament of a particular
structure without stating any other relationship of the
filament to the other parts of the lamp is classified in
subclasses 326+. Where the patent claims an envelope having
a filament or glower being defined by either its structure or
by its composition, the patent is classified in this subclass
(315).
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for plural unit devices under the class definition which
include at least one incandescent lamp unit and a discharge
device unit. Note that incandescent lamps having only plural
filaments or glowers are not classified in subclasses 1+ but
are in indented subclass 316.
9 for incandescent lamps which include a filament or glower
and a separate body, not an electrode, which is designed to
be heated to incandescence by the filament or glower.
110 for incandescent lamps which have integrally combined
therewith an optical device or which have the envelope made
of a material which transmits a particular portion of the
spectrum (e.g., ultraviolet light). See subclass 112 where
the optical device is a polarizer, a filter or where the
envelope is special ray transmissive. See subclasses 113+
where the optical device is a reflector; subclass 116 where
the optical device is a light diffusing means and subclass
117 where the optical device is a light valve or light
obscuring means.
235 for incandescent lamps which include two electrodes
which are maintained in imperfect contact, the lamps being
designed so that the passage of electric current from one
electrode to the other produces light adjacent the ends of
the electrodes which are in contact with each other.
271 for incandescent lamps having supporting and/or spacing
structure for the filament or glower. Where the only
significant lamp structure recited is the supporting and/or
spacing structure for the filament or glower either with or
without the enclosing envelope, the patent is classified in
subclasses 271+ of this class. Where the structure is
disclosed or claimed in addition to the filament or glower
supporting and/or spacing structure, the patent is classified
in subclasses 271+ and cross-referenced to this or the
indented subclass.
313 for incandescent lamps provided with means for
preventing the accumulation of static charges upon parts of
the lamp or for preventing undesired arc or other discharges
between the parts of the lamp.
314 for incandescent lamps which are provided with means
which prevents repair of the incandescent lamp.
331 for the structure of lamp filaments and glowers which
have combined therewith a lead wire or connector. See (4)
Note above.
341 for the structure of filaments and glowers. See (4)
Note above.
549 where the incandescent lamp has an envelope which
contains a getter, a gas or vapor generating material or is
provided with means for regulating the pressure within the
envelope.
578 where the incandescent lamp has an envelope which
contains a gas or vapor.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 32
especially subclasses 32, 46+, 49, 51+, and 64 through 74 for
incandescent lamps which have structurally combined therewith
a circuit element such as an electric switch or an impedance.
See subclasses 46+ for the structural combination of an
incandescent lamp and a discharge device where the lamp
filament is connected in shunt relation to the discharge
electrode, subclass 49 for the structural combination of an
incandescent lamp and a discharge device where the lamp
filament is connected in series with the discharge device.
See subclasses 51+ where the incandescent lamp has a
plurality of circuit elements combined therewith.
Subclass:
316
This subclass is indented under subclass 315. Lamps which
are provided with a plurality of filaments or glowers, the
filaments or glowers being provided with separate terminals
so that the filaments or glowers are adapted to be
independently energized.
(1) Note. One terminal may have a plurality of filaments or
glowers connected to it, the filaments or glowers being
provided with separate terminals for the other ends of the
filaments or glowers so that they may be independently
energized.
(2) Note. See notes (2) to (4) in the definition of
subclass 315 with respect to the classification of multiple
filament lamps in the subclasses which precede subclass 315
and this indented subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
115 where the lamp has a reflector integrally combined
therewith.
236 for multiple filament electric lamps which are provided
with means, other than the mere terminals of the lamp, so
that one of the filaments or glowers may be used to the
exclusion of the other, the means being capable of selecting
either of the filaments or glowers for use.
272 for lamps which including significant supporting and/or
spacing structure for a plurality of filaments or glowers.
Where the only significant lamp structure claimed is the
supporting and/or spacing structure for the filaments or
glowers, either with or without the enclosing envelope, the
patent is classified in subclass 272. Where structure is
disclosed or claimed in addition to the supporting and/or
spacing structure for the filaments or glowers, the patent is
classified in subclass 272 and cross-referenced to this
subclass.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 64 where
the lamp has structurally combined therewith a circuit
element such as an electric switch or impedance. Note that
indented subclass 65 has multiple filament or glower lamps
which include switch means in the lamp to energize one
filament when another filament fails to operate properly.
Subclass:
317
This subclass is indented under the class definition.
Devices provided with an envelope which encloses the
electrodes of the device.
(1) Note. This subclass provides only for lamps and
discharge devices which are provided with an envelope when
there is some significance in the use of the envelope in a
lamp or discharge device. Also, included are lamps and
discharge devices which are provided with a specific envelope
where the claims state that the envelope contains one or more
electrodes of a discharge device, a lamp filament, or other
structure sufficient to exclude the patent from the classes
which provide for the envelope and envelopes with bases, per
se. Envelopes, per se, for lamps and discharge devices are
classified in Class 220, Receptacles, subclasses 2.1+, or
Class 174, Electricity: Conductors and Insulators if claimed
in combination with the lead-in structure, or in Class 439,
Electrical Connectors, if claimed in combination with
electrical connector structure as pointed out in the class
definition. See the class definition for the line between
Class 313 and the other classes with respect to the subject
matter provided for in this subclass. Consequently, patents
disclosing envelopes for electric lamps and discharge devices
are not cross-referenced into this subclass solely for the
envelope structure of for the structure of the envelope and
its base (electrical connector), but are cross-referenced in
one of the classes specified in the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17 where the envelope of the device is provided with a
jacket or casing for modifying the temperature of the
envelope (e.g., cooling, heating or insulating the device),
see subclasses 25+ where the envelope is provided with spaced
double walls and includes means (e.g., vacuum, gas,
insulating material) in the space between the envelope walls
for modifying the temperature of the lamp or discharge
device.
33 where the envelope is provided with an internal
temperature modifying baffle.
34 where the envelope is provided with a condensing chamber
or surface to cool the gas or vapor within the envelope.
44 where the envelope wall is provided with means to modify
the temperature of the device (e.g., heat radiating means,
etc..).
109 where the envelope is coated or contains a fluorescent
or phosphorescent material.
110 where the envelope is provided with optical means (e.g.,
lens, etc..) to modify the ray energy passing through the
envelope wall, see subclass 112 where the optical means is a
polarizer, or filter, subclass 113 where the optical means is
a reflector, subclass 116 where the envelope wall is light
diffusing, and subclass 117 where the optical means is a
light valve or light obscuring means.
148 where the device has a movable electrode and a portion
of the envelope wall is moveable to transmit motion to the
movable electrode.
168 for liquid electrode (e.g., mercury) discharge devices
having a plurality of anodes, the envelope being provided
with separate anode chambers.
237 where the envelope and the parts of the device are made
so that the device can be readily disassembled to repair or
replace a part of the device.
242 for devices under the class definition which have means
for supporting a shield, the shield being supported by or
forming part of the stem of the envelope.
246 and 248, for discharge devices having an envelope and
means for supporting and/or spacing a plurality of electrodes
therein, the envelope being formed of conductive material.
See subclasses 246+ where the conductive envelope portion is
an electrode of the device.
266 for discharge devices under the class definition having
a plurality of electrode supported by wires, rods, or tubes
within an envelope, the structure of the envelope or the
envelope stem which supports the electrode supports being
modified.
282 for devices which have an envelope with an electrically
conductive (e.g., metal) envelope portion which supports an
electrode within the envelope.
290 for devices under the class definition having an
electrode supported by a wire, rod or tube within an
envelope, the structure of the envelope or the envelope stem
which supports the electrode support being modified.
312 where the device is provided with an envelope and has a
separable casing or jacket which wholly or partially
surrounds the envelope.
313 for devices under the class definition provided with
means for preventing the accumulating of static charges upon
the envelope.
314 for devices under the class definition provided with
envelopes which shatter when an attempt is made to open the
envelope for the purpose of repairing the electrodes of the
device.
315 for incandescent lamps provided with an envelope. See
(3) Note to the definition of subclass 315 for the
incandescent lamps which are classified in this and the
indented subclass.
530 where the device is a photo-sensitive discharge device
having the cathode on the envelope wall.
547 where the envelope is provided with valve means for
introducing a gas or vapor into or withdrawing a gas or vapor
from the envelope.
609 for gas or vapor discharge devices where the envelope is
shaped so that a portion of the envelope is interposed in the
straight line path between the electrodes (e.g., coiled,
U-shaped, etc..) or where the envelope is provided with a
restricted cross-sectional portion so as to provide a
partition or baffle between the discharge electrodes.
626 where the device includes an envelope containing an
atmosphere of a gas or vapor and a lead-in wire, the stem of
the envelope being formed so as to shield the lead-in wire
from deleterious influences, such as sputtered particles,
vaporized metals, etc..
634 and 636, where the device includes an envelope
containing an atmosphere of gas or vapor. See subclasses
634+ where the device is defined by the structure of the
envelope and subclass 636 where the device is defined by the
composition of the envelope.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, see (1) Note,
above.
220, Receptacles, 2.1 see (1) Note, above.
439, Electrical Connectors, and see (1) Note, above.
Subclass:
318.01
Having base and connector:
This subclass is indented under subclass 317. Devices
wherein the envelope is provided with a base attached to the
envelope, the base being provided with contact means for
making electrical connection to the electrodes of the
device.
(1) Note. This subclass provides only for lamps and
discharge devices which have an envelope and the base
therefor when there is some significance in the fact that the
device within the envelope is a lamp or discharge device.
This subclass, therefore, is subject to all the limitations
set forth in the notes to the definition of subclass 317. As
pointed out in the class definition, lamps and discharge
devices having an envelope with a base therefor where the
base includes electrical connector means (e.g., contact
prongs) are classified in Class 439, Electrical Connectors,
where no significant structure of the lamp or discharge
device is claimed. Likewise, lamps and discharge devices
having an envelope with an attached base where the structure
claimed relates solely to the joint between the base and the
envelope are classified in Class 403, Joints and Connections,
as pointed out in the class definition. Envelopes having a
base thereon are classified in Class 220, Receptacles,
subclasses 2.1+ where electrical features are not claimed.
See the class definition. Consequently patents disclosing
lamps and discharge devices which have an envelope and the
base thereon are not cross-referenced into this subclass
solely for the structure of the envelope and its base
(electrical connector) but are cross-referenced in one of the
classes specified in the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247 253+, 274, and 286, for devices under the class
definition which have an envelope and an electrode which is
supported by support structure such as lead-in conductors,
wires, rods, or tubes which are supported by opposed or
spaced parts of the envelope wall (double-ended devices). See
subclass 247 where the device is a discharge device and the
envelope has a portion of the wall formed of conductive
material which is designed for use as an electrode,
subclasses 253+ for other discharge devices having supporting
means for a plurality of electrodes, at least one of which is
so supported, subclass 274 where the device has a filament so
supported, and subclass 286 for miscellaneous devices under
the class definition having an electrode so supported.
315 for incandescent lamps provided with a base where the
base is accurately located with respect to the filament or
light emitting body so as to form a prefocused lamp.
SEE OR SEARCH CLASS:
220, Receptacles, 2.1, and see (1) Note above.
403, Joints and Connections, see (1) Note above.
439, Electrical Connectors, 611 for electrical connectors
having a vitreous envelope secured to an electrical contact
or coupling part (i.e., lamp or tube base type), and see
subclasses 660+ for various types of connectors, per se,
which may or may not be disclosed as being subcombinations of
a lamp or space discharge device. Also, see (1) Note above.
Subclass:
318.02
Secure to each end of a double-ended or tubular envelope:
This subclass is indented under subclass 318.01. Devices
wherein the envelope has a cylindrical form or a particular
form that has two opposite ends and wherein the base is
supported by one end of the envelope which is opposite to the
other end of the envelope which is secured to either a
different portion of the same base or another base.
Subclass:
318.03
Having an annular contact disposed concentrically about the
longitudinal axis of the envelope:
This subclass is indented under subclass 318.01. Devices
wherein the base has at least two contacts, at least one of
which is annular and concentric about a longitudinal axis of
the envelope or about an axis of engagement to a
corresponding socket.
Subclass:
318.04
Having screw thread coupling contact:
This subclass is indented under subclass 318.03. Devices
wherein the annular contact is concentrically disposed about
a central contact and is in the form of a sleeve having
grooves or threads which function to mechanically and
electrically couple the base to a corresponding socket having
a mating annular grooved or threaded contact and a central
contact.
Subclass:
318.05
Having spaced, longitudinally engaging, pronglike contacts:
This subclass is indented under subclass 318.01. Devices
wherein the base has extending therefrom at least two
elongated, fingerlike contacts which are spaced apart and
electrically insulated one from another.
Subclass:
318.06
Having three or more electrical contacts:
This subclass is indented under subclass 318.01. Devices
wherein the base includes three or more electrical contacts.
Subclass:
318.07
Associated with pinch (or press) seal of envelope:
This subclass is indented under subclass 318.01. Devices
wherein the base is attached to a sealed portion of the
envelope, the seal portion being flat and having two major
surfaces and two minor surfaces.
Subclass:
318.08
Base attached to the envelope with cement or adhesive:
This subclass is indented under subclass 318.01. Devices
wherein the base is attached to the envelope with a cement or
adhesive-type material.
Subclass:
318.09
Base attached to the envelope with friction or other
mechanical means:
This subclass is indented under subclass 318.01. Devices
wherein the base is friction fitted to the envelope or is
secured to the envelope using other mechanical means such as
a screw, nut, bolt, etc..
Subclass:
318.1
Resilient mechanical means for attaching the base to the
envelope:
This subclass is indented under subclass 318.09. Devices
wherein the base is secured to the envelope with mechanical
means, the mechanical means being resilient (or elastic or
flexible) and the resilience of the mechanical means enabling
the attachment of the base to the envelope.
Subclass:
318.11
Having a reflector in combination with base:
This subclass is indented under subclass 318.01. Devices
wherein the base is formed as a part of a radiant energy
reflecting structure or is attached to an end portion of a
radiant energy reflecting structure.
Subclass:
318.12
Having a connector:
This subclass is indented under subclass 317. Devices
wherein the envelope is provided with electrical contact
means for making electrical connection to the electrodes of
the device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
318.01 for an envelope having both a base and a connector
means.
Subclass:
323
This subclass is indented under the class definition. Lamps
and discharge devices claimed in combination with structure
classifiable, per se, in other classes when such combinations
are not classified in any of the subclasses in this class
preceding this subclass.
(1) Note. In this and the indented subclass, for example,
are lamps and discharge devices which have a casing (other
than an envelope or a casing provided for temperature
modifying purposes), and combinations with signal or
indicator means.
(2) Note. This and the indented subclass contains
cross-references of patents for lamps and discharge devices
classified in the preceding subclasses which do not
specifically provide for combined subject matter.
Subclass:
324
This subclass is indented under subclass 323. Subject matter
where the lamp or discharge device is provided with a jacket
or casing which wholly or partially surrounds the lamp or
discharge device.
(1) Note. This subclass does not provide for lamps
(including those of the discharge device type) in combination
with a separable casing or jacket for the lamp. For the
classification of the excluded subject matter, see the class
definition. Likewise, this subclass does not provide for
certain types of discharge devices such as cathode-ray tubes
and photo-cells in combination with a separable casing or
jacket therefor. For the classification of this excluded
subject matter, see the class definition. See the class
definition where the structure includes means for modifying
the temperature of the lamp or discharge device. Separable
casings and jackets, per se, are provided for in other
classes. See the class definition where the casing or jacket
is designed for use with temperature modifying means for the
lamp or discharge device or includes temperature modifying
means and for the classification of miscellaneous separable
casings and jackets, per se.
SEE OR SEARCH THIS CLASS, SUBCLASS:
36 where the device is provided with a jacket or casing for
directing the flow of a temperature modifying medium about
some part of the device.
312 and the subclasses specified in the notes thereto, where
the lamp or the discharge device is provided with an envelope
and a casing or jacket which wholly or partially encloses the
envelope.
313 where the casing includes means for shielding the
enclosed device or is provided with means for preventing the
accumulation of static charges upon the casing or jacket.
317 and the subclass specified in the notes thereto where
the casing or jacket is an envelope for the lamp or discharge
device.
Subclass:
325
This subclass is indented under the class definition.
Discharge devices which are not classifiable in any of the
subclasses above.
(1) Note. This subclass includes discharge devices having
an electrode formed of solid material which is electron
permeable, discharge devices which have an insulating
material in the discharge space and miscellaneous lightning
arrestors of the space discharge type which are not provided
for in the preceding subclasses.
Subclass:
326
Electrodes and shields for electric lamps and electric space
discharge devices which are defined by their structure.
(1) Note. For the definition of "electrodes" and "shields",
see the glossary in the class definition.
(2) Note. This and the indented subclasses do not include
electrodes and shields which are defined solely by their
composition. Also excluded are electrodes and shield which
are defined by their composition and the only structure
defined is that the electrode is a wire, rod, strip,
cylinder. Also excluded are electrodes and shields which
involve no more structure than a base having a coating
thereon. For the classes which provide for the excluded
subject matter and the distinction between such classes, see
the class definition.
(3) Note. Joints and connections between an electrode or
shield and a lead wire or connector are not included in this
or the indented subclass unless the structure claimed
includes some significant structure of the electrode or
shield beyond that which is provided for making the joint or
connection. Where the structure of the electrode or shield is
not involved excepting such structure as is necessary for the
joint, even though the joint is claimed as being for
electrically connecting the parts, see the classes referred
to in the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 where the electrode structure includes means for
modifying the temperature of the electrode (e.g., hollow
electrodes having conduits therein for circulating a cooling
fluid therethrough, electrodes having heat radiating
surfaces, electrodes provided with heat insulating means).
54 where the electrode contains or is coated with a
radio-active material.
631 for devices under the class definition having an
envelope containing a gas or vapor and an electrode of
particular structure.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, subclass 95 and 98 for
electrodes for electrical precipitators.
219, Electric Heating, 145.1 and 146.1+ for electrodes
designed for use in arc welding.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, subclass 60 for electrodes limited by claimed
structure to use in discharge devices of the consumable
electrode type, where the feed of an electrode towards
another of the electrodes is accomplished by the consummation
of the electrode material or by the destruction of
obstructions to the motion of the electrode.
378, X-Ray or Gamma Ray Systems or Devices, 121 and 143+ for
X-ray tube electrodes; and subclasses 145+ and 203 for
shields.
428, Stock Material or Miscellaneous Articles, 364 for a
rod, strand, fiber or filament which is coated or is
structurally defined, but omits structure (e.g., terminals or
leads) which defines an electrode or a shield, or a product
for classification elsewhere, and subclass 560 for a metallic
composite in which a component has metal particles held in a
nonmetal which acts as a binder.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, 35, 46+ and 60+ and the classes specified in
the notes thereto for processes and apparatus for making
electrodes and shield for electric lamps and space discharge
devices.
Subclass:
327
This subclass is indented under subclass 326. Electrodes
which are composed at one end of an unbaked material, the
unbaked material being designed to be baked by heat applied
to the electrode during the use of the electrode.
(1) Note. The heat to bake the electrode may be generated by
a space discharge, or by the heat generated by the resistance
to the passage of the current which flows from the end of the
electrode to the lead-in conductor for the electrode.
(2) Note. With respect to the subject matter of this
subclass, there is little distinction between the process of
making the article and the process of using the article.
Therefore, any claims relating to processes of making
self-baking electrodes will be deemed to be directed to a
process of using the same where the process includes the
baking in the use of the electrode article. For classes
which relate to processes of using self-baking electrodes,
see the search notes below. Processes of using the
electrodes are classified with the art to which the process
relates.
SEE OR SEARCH CLASS:
204, Chemistry: Electrical and Wave Energy, 280 for
self-baking or Soederberg electrodes limited to use in
electrolytic apparatus. Where the disclosure is that the
electrode can be used in an electrolytic device and the
claimed structure does not necessarily so limit the electrode
to such use, the patent is classified in Class 313 and cross
referenced to Class 204.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, appropriate subclasses, for processes within the
class definition, for molding or shaping plastic materials,
particularly 104 and 614+ pertaining specifically to molding
of electrical articles.
373, Industrial Electric Heating Furnaces, subclass 89 and
97 for self-baking electrodes in electric furnaces.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, 1 and 60+ for Methods and Apparatus for the
miscellaneous manufacture of electric light and space
discharge devices and the electrodes therefor.
Subclass:
328
This subclass is indented under subclass 326. Structures
designed for use as a receptacle for a liquid electrode
(e.g., mercury).
(1) Note. The structures in this subclass include
receptacles for liquid electrodes where the receptacle is to
be attached to an envelope of the discharge device,
receptacles for liquid electrodes which are designed to be
placed within the envelope, and the structure of the envelope
portion which is to receive the liquid electrode.
(2) Note. The receptacles in this subclass usually include
means to conduct electricity to the liquid electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16 for liquid electrode discharge devices which have an
electric heater for the liquid electrode.
29 for liquid electrode discharge devices which have means
for modifying the temperature of the liquid electrode.
150 for liquid electrode discharge devices which have a
movable liquid electrode.
163 for the miscellaneous liquid electrode discharge
devices, see subclass 173 where the liquid electrode includes
means to prevent the space discharge from wandering over the
liquid electrode surface.
Subclass:
329
This subclass is indented under subclass 326. Electrodes
where the electrode surface is in the form of minute
conductive areas insulated electrically from each other and
arranged in the manner of a mosaic surface.
(1) Note. The insulation may be of high resistance so as to
allow the leakage of electricity from one area to another.
(2) Note. In many of the patents in this subclass, the
small minute areas are photosensitive, but they need not be
photosensitive.
SEE OR SEARCH THIS CLASS, SUBCLASS:
367 for cathode-ray tubes having a photosensitive mosaic
electrode.
531 for miscellaneous photosensitive discharge devices
having a photosensitive mosaic electrode.
SEE OR SEARCH CLASS:
427, Coating Processes, 77 for processes of coating wherein
the product is electron emissive or suppressive.
428, Stock Material or Miscellaneous Articles, subclass 376
for an electrode having a discontinuous coating thereon which
may be of the mosaic type, and which includes no more
structure than a base having one or more coatings thereon.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, subclass 52 and 60+ and the classes specified
in the notes thereto, for processes and apparatus for making
mosaic electrodes.
Subclass:
331
This subclass is indented under subclass 326. Electrodes and
shields which have combined therewith a lead-wire or an
electrical connector.
(1) Note. An electrical connector is defined for the
purpose of classification in these subclasses as any device
or means which is provided for the purpose of attaching a
lead wire or conductor to the electrode or shield. The
connector may be a part of the electrode or shield structure
or may be merely attached mechanically to the electrode or
shield.
(2) Note. Joints and connections between an electrode or
shield and a lead wire or connector are not included in this
or the indented subclasses unless the structure claimed
includes some significant structure of the electrode or
shield beyond that which is provided for making the joint or
connection. Where the structure of the electrode or shield
is not involved excepting such structure as is necessary for
the joint, even though the joint is claimed as being for
electrically connecting the parts, see the classes referred
to in the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for devices under the class definition which have
supporting and/or spacing structure for the electrode or
shield. In some of the devices in subclasses 238+ the
electrode support is made of electrically conductive material
and is used as a lead-in conductor to conduct electricity to
the electrode.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 144
for arcing rings and electrodes which include as a part
thereof electrical connector structure, per se, which are
specifically designed for use with the insulators of Class
174.
252, Compositions, 500 for electrically conductive
compositions even if they are coating or plastic compositions
such as electrically conductive cements specialized for use
in joining an electrode to its lead wire or connector.
420, Alloys or Metallic Compositions, subclass 591 for
alloys designed for use in soldering, brazing or welding an
electrode to its lead wire or connector.
Subclass:
332
This subclass is indented under subclass 331. Structure
having, (1) a connector or coupling section mounted between
and joined to the electrode or shield and the lead wire or
connector, or (2) a material interposed between the electrode
or shield and the lead wire or connector.
(1) Note. In some of the patents in this subclass, the
interposed section or material is used to join the electrode
or shield to the lead wire where the electrode or shield and
the lead wire will not unite directly to each other because
of the material used for the electrode or shield or lead
wire. In others, the interposed section or material is used
only to secure a better electrical or mechanical joint.
SEE OR SEARCH CLASS:
403, Joints and Connections, appropriate subclasses for
joints and connections of general utility even though
designated as an electrical connection.
Subclass:
333
This subclass is indented under subclass 331. Structure
where the electrode or shield is a filament or formed of wire
and the lead wire or connector is attached to the filament or
wire.
SEE OR SEARCH THIS CLASS, SUBCLASS:
271 for devices under the class definition which have
significant supporting and/or spacing structures for a
filament. In some of these devices, the supporting members
are formed of electrically conductive material and are
designed to be used as the lead-in conductor to conduct
electricity to the electrode.
332 when there is, (1) a connector or coupling section
mounted between and joined to the filament or wire and the
lead wire or connector, or (2) a material is interposed
between the electrode or shield and the lead wire or
connector.
341 for the structure of filaments for electric lamps and
discharge devices.
348 for electrodes and shields for electric lamps and
discharge devices other than filaments which are made of wire
(e.g., grids).
SEE OR SEARCH CLASS:
403, Joints and Connections, appropriate subclasses for a
mere connection between a filament or wire and another wire
even though designated as an electrical connection.
439, Electrical Connectors, appropriate subclasses for an
electrical connector, generally, and for the combination of
an electrical connector with a "named" electric lamp. See
the class definition of that class (439), section IV, for the
line between Class 439 and other classes which provide for
joint structure.
Subclass:
334
This subclass is indented under subclass 331. Structure
where the electrode or shield is formed at least in part of a
nonmetallic material and the lead wire or connector is
connected to the nonmetallic part of the electrode or
shield.
SEE OR SEARCH THIS CLASS, SUBCLASS:
333 where the electrode is a filament, or an electrode or
shield formed of filamentary strands which has its end
structure modified to facilitate connecting the lead wire or
connector to the filament, electrode or shield.
SEE OR SEARCH CLASS:
252, Compositions, 500 for electrically conductive
compositions even if they are coating or plastic compositions
such as electrically conductive cements specialized for use
in joining a nonmetallic electrode or shield to a connector.
403, Joints and Connections, appropriate subclasses for a
joint of general utility even though designated as an
electrical connection.
428, Stock Material or Miscellaneous Articles, subclass 416,
418, 432+, 444, 450, and 457+ for a nonstructural composite
web or sheet embodying a layer of metal next to a nonmetal.
Subclass:
335
This subclass is indented under subclass 331. Structure
where the electrode or shield is in the form of a rod-like
body.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for devices under the class definitions which are
provided with supporting and/or spacing structures for a rod
electrode. In some of these devices, the supporting member
is designed for use as the lead-in conductor to conduct
electricity to the rod. See indented subclass 267 where the
supporting structure for supporting a plurality of rod
electrodes is claimed. See subclass 238 where the support
structure for a single rod electrode is claimed.
333 where the electrode or shield is a filament or is formed
of wire.
357 for the structure or rod electrodes or shields, per se.
Subclass:
336
This subclass is indented under subclass 326. Cathodes where
the cathode is designed so that the electron emission from
the cathode is restricted to a point-like area.
SEE OR SEARCH THIS CLASS, SUBCLASS:
364 for cathode-ray tubes having point source cathodes.
SEE OR SEARCH CLASS:
378, X-Ray or Gamma Ray Systems or Devices, 121 for X-ray
tubes having point source cathodes.
Subclass:
337
This subclass is indented under subclass 326. Cathodes which
include a cathode member and a source of heat energy for
heating the cathode member, the heating means being a member
or device separate from the cathode member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
270 and the subclasses specified in the notes thereto for
devices under the class definition which include supporting
and/or spacing structure for an indirectly heated cathode.
305 for discharge devices provided with at least three
electrodes, a cathode emitting electrons to a first anode
which is heated by the space discharge, the heated anode
having a surface which when heated emits electrons to a
second anode (the third electrode). These devices are
sometimes known as "cathanode" devices.
310 and the subclasses specified in the notes to the
definition of that subclass for discharge devices which have
an indirectly heated cathode.
336 where the cathode is designed so that the electron
emission is restricted to a point-like area.
341 for filaments and other resistance heated electrodes for
electric lamps and space discharge devices.
Subclass:
338
This subclass is indented under subclass 337. Cathodes where
the cathode is provided with a plurality of electron emissive
sections which are electrically insulated from each other so
that the cathode affords a plurality of electrically
independent cathode sections.
Subclass:
339
This subclass is indented under subclass 337. Cathodes where
the cathode member is formed with a hollow cavity, the
cathode member being designed to emit electrons from the
interior walls of the hollow cavity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
346 for cathodes under subclass 643 which include a body or
mass of electron emissive material which is at least partly
enclosed within a support or carrier member, the support or
carrier being permeable to electrons, or being permeable to
the electron emissive material so that the material can
permeate the support or carrier and form a coating thereon.
Subclass:
340
This subclass is indented under subclass 337. Cathodes which
are provided with an electrical insulating material between
the cathode member and the heating means for the cathode.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 137 for
insulators, note subclass 138 for cathode heater insulators,
per se, and subclasses 110+ for insulated electric
conductors.
219, Electric Heating, subclass 531 for electric heaters
provided with insulating means including the combination of
an electrical heater and insulating means for an indirectly
heated cathode where the cathode is not included in the
claims.
252, Compositions, 570 for fluent electrical insulating
materials and compositions.
338, Electrical Resistors, 226 for electrical resistors
having a casing or housing around the resistance element.
427, Coating Processes, 58 for processes of coating, per se,
wherein the product is an electrical product.
428, Stock Material or Miscellaneous Articles, 375 for a
filament or electrode for electric lamps and space discharge
devices which have an insulting coating thereon.
501, Compositions: Ceramic, appropriate subclasses for
ceramic electrical insulating compositions, especially 127
and 134+ for clay containing compositions; and subclasses
141+ for titanates and similar material containing
compositions.
Subclass:
341
This subclass is indented under subclass 326. Electrodes
which are either, (1) filaments, or (2) of the type which are
designed to be heated by the flow of electric current through
the electrode.
(1) Note. For the other classes which provide for filaments
and resistance heated electrodes including those for use in
electric lamps and discharge devices, and for the processes
and apparatus for making filaments and resistance heated
electrodes, see the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
271 for devices under the class definition which have a
filament and which have supporting and/or spacing structure
for the filament.
310 and the subclasses specified in the notes thereto for
discharge devices which are provided with a filament or
resistance heated cathode.
315 for incandescent lamps with filaments or resistance
heated glowers.
336 where the electrode is electron emissive, the electrode
being designed so that the electron emission is restricted to
a point-like area.
337 and the subclasses specified in the notes thereto where
the electrode is an indirectly heated cathode, that is, the
cathode includes an electron emissive part and a separate
heating means to heat the emissive part to the electron
emitting temperature.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, 364 for a
filament which is coated or is structurally defined, but
omits structure (e.g., terminals or leads), which defines an
electrode for Class 313 or a product elsewhere classified.
Subclass:
342
This subclass is indented under subclass 341. Filaments and
electrodes where the parts of the filament and electrodes are
arranged so as to reduce to a minimum the electromagnetic or
electrostatic field which is generated by the current flowing
through the filament or electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
337 for indirectly heated cathodes which are provided with
means to shield the electrons emitted by the cathode from the
electromagnetic or electrostatic field generated by the
heating means.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 32 for
conductors of the noninductive type.
Subclass:
343
This subclass is indented under subclass 341. Filaments and
electrodes which are composed of a plurality of inter-engaged
wires or strands assembled to form a single electrode
structure.
SEE OR SEARCH CLASS:
57, Textiles: Spinning, Twisting, and Twining, 200 and the
classes specified in the notes thereto for spun, twisted or
twined strands.
174, Electricity: Conductors and Insulators, 128.1 for
plural strand conductors.
428, Stock Material or Miscellaneous Articles, subclass 608
for metallic stock material which embodies interengaged
fibers.
Subclass:
344
This subclass is indented under subclass 341. Filaments and
electrodes where the filament is formed into a coil.
(1) Note. A coil is defined for the purpose of
classification in this subclass as a filament or electrode
having at least one convolution.
SEE OR SEARCH THIS CLASS, SUBCLASS:
341 for mere U-shaped, V-shaped or looped filaments and
electrodes within the definition of subclass 341.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, subclass 592
for metallic stock material in the shape of a helix or which
has a helical component.
Subclass:
345
This subclass is indented under subclass 341. Filaments and
electrodes where the filament or electrode is provided with a
coating.
(1) Note. The coating may be either electron emissive or
not electron emissive.
(2) Note. This subclass includes only those patents which
claim structure of the filament or electrode other than
merely reciting that the electrode is a filament, rod
cathode, electrode or base, which is provided with a coating.
Where no more is claimed than the mere base with a coating
thereon, the patent is classified in one of the classes
specified in the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
346 for the structure of other electrodes under subclass 326
which are provided with an electron emissive coating.
355 for the structure of other electrodes under subclass 326
which have a coating thereon.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, subclass 554
for a metal particle-containing stock material composite.
Subclass:
346
This subclass is indented under subclass 326. Electrodes
which are made at least in part of electron emissive material
or which are coated with electron emissive material.
(1) Note. Where no structure other than the mere
composition of the electrode is claimed, or no structure
other than the mere composition of the base and/or coating is
claimed, the patent is excluded from Class 313. Merely
naming the electrode as a wire, rod, filament, plate or
electrode will not cause classification in Class 313. For
the classification of electrodes defined only by their
composition, and for coated electrodes involving only a base
with a coating thereon, see the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
310 and the subclasses specified in the notes thereto for
discharge devices which are provided with an emissive
cathode.
329 for the structure of electron emissive mosaic
electrodes.
336 for the structure of electron emissive electrodes where
the electron emission is restricted to a point-like source.
337 for the structure of electron emissive indirectly heated
cathodes.
341 for the structure of electron emissive filaments and
resistance heated electrodes, see indented subclass 345 where
the filament or resistance heated electrode has an emissive
coating thereon.
353 for electrode structure where a portion of the electrode
is a nondischarge sustaining portion.
SEE OR SEARCH CLASS:
427, Coating Processes, 58 for processes of coating, per se,
wherein the product is an electrical product.
428, Stock Material or Miscellaneous Articles, 375 for a
filament or electrode which may be made at least in part from
electron emissive material or which is coated with electron
emissive material, and subclass 553 for an electrode
comprising a particulate metal component adjacent to a
nonparticulate metal component.
Subclass:
347
This subclass is indented under subclass 326. Electrodes
which are constructed so that at least a small area of the
electrode becomes incandescent when bombarded by electrons.
(1) Note. This subclass is limited to electrodes which are
especially designed to have a portion of the electrode become
incandescent when bombarded by electrons and does not include
electrodes, such as anodes, which may become heated only as
an undesired incident of their operation.
(2) Note. Some of the electrodes in this subclass are
intended for use as targets in cathode-ray tubes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
346 for electrodes containing and/or coated with electron
emissive material designed for use in discharge devices,
usually of the type containing a gas or vapor, and which are
designed to become heated by the bombardment of the electric
space discharge so that they become thermionic electrodes.
305 for miscellaneous discharge devices which have an anode
which is designed to be heated by the space discharge.
Included in subclass 305 are discharge devices where the
heated anode has a surface designed to emit electrons to a
second anode (an electrode other than the cathode which emits
electrons to the heated anode).
464 for cathode ray devices provided with targets adapted to
be rendered incandescent by the cathode beam.
627 for discharge devices of the gas or vapor type having a
thermionic cathode which is heated by the space discharge.
Also 627+, for discharge devices of the gas or vapor type
having an anode which is heated to incandescence by the space
discharge.
SEE OR SEARCH CLASS:
378, X-Ray or Gamma Ray Systems or Devices, for X-ray tube
targets or anticathodes.
Subclass:
348
This subclass is indented under subclass 326. Electrodes and
shields which are formed of open-work material such as wire
mesh or perforated sheet material, or which are formed of
wires or bars, or which are otherwise provided with openings
in the wall of the electrode or shield.
(1) Note. Some of the electrodes in this subclass are
intended for discharge control electrodes or grid electrodes,
but also included are all foraminous and grid-like electrode
structures even though claimed as being used for anodes,
cathodes or other electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
293 and the subclasses specified in the notes thereto for
discharge devices which have a foraminous or grid-like
electrode disposed in the inter-electrode space between two
other electrodes.
346 where the foraminous or open-work electrode forms a
support or carrier for a body or mass of electron emissive
material, the body or mass of electron emissive material
being at least partly enclosed within the foraminous or
open-work electrode contains or is coated with electron
emissive material.
SEE OR SEARCH CLASS:
245, Wire Fabrics and Structure, appropriate subclasses for
flexible wire or slat-and-wire fabrics.
442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth,
etc..), 1 for an open mesh material.
Subclass:
349
This subclass is indented under subclass 348. Electrodes and
shields, (1) having the ratio of area of free passage through
the openings in the electrode or shield to the obturating
area of the electrode or shield in one region of the
electrode or shield different from such ratio in another
region of the electrode or shield, (2) where the electrode or
shield wall surface is not a cylindrical hollow sleeve and is
of a nonstraight surface configuration with the foraminous
wall of the electrode or shield lying in at least two
different planes, or (3) having the foraminous wall surface
of the electrode or shield in the form of a hollow sleeve,
the sleeve having the cross-sectional area at one region of
the electrode or shield different from the cross-sectional
area at another region of the electrode or shield.
(1) Note. Under (1) in the subclass definition is included
electrodes and shields having at least one opening in the
electrode or shield of a different area from the area of
another of the openings, or electrodes and shields having the
openings in the electrode or shield nonuniformly spaced with
respect to each other, or electrodes and shields formed of a
wire coil or helix which has a nonuniform pitch for the turns
of the coil or helix. Under (3) in the subclass definition
is included electrodes and shields the wall surface of which
is conical, in the form of a truncated cone, barrel-shape or
spherical.
(2) Note. Many of the electrodes in this subclass are
intended for use as discharge control electrodes in discharge
devices of the variable-mu type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
294 for discharge devices having a foraminous or grid
electrode interposed in the discharge space between two other
electrodes, the foraminous or grid electrode being
nonuniformly spaced from the other electrodes (e.g., the
foraminous or grid electrode being eccentrically mounted, or
being noncylindrical with respect to concentric electrodes,
etc..).
295 for discharge devices having a foraminous or grid
electrode interposed in the discharge space between two other
electrodes, the foraminous or grid electrode having a
nonuniform mesh area.
348 and 350, for foraminous or open-work electrodes and
shields where the wall surface is a straight hollow sleeve
and is uniformly foraminous over its surface.
Subclass:
350
This subclass is indented under subclass 348. Electrodes and
shields where the electrode or shield is formed of rods, wire
or mesh material which is attached to one or more rods or
posts so as to give the desired rigidity to the electrode or
shield.
SEE OR SEARCH CLASS:
245, Wire Fabrics and Structure, subclass 11 for slat and
wire fabrics.
Subclass:
351
This subclass is indented under subclass 326. Electrodes and
shields where the electrode or shield is provided with, (1) a
plurality of pointed needle-like portions, or (2) with a
serrated edge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
309 for discharge devices which have a multipointed or
serrated edge electrode.
Subclass:
352
This subclass is indented under subclass 326. Electrodes and
shields which are composed of a plurality of parts or
sections, one of the parts or sections being composed of a
different material from the material of which another part or
section is composed.
(1) Note. This and the indented subclasses includes the
structure of electrodes and shields which are formed of one
material and which are coated with another material.
(2) Note. This and the indented subclasses do not include
electrodes or shields which are composed of a plurality of
materials which are mere constituents of a single composition
or alloy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
337 where the electrode is an indirectly heated cathode.
343 for this subject matter where the electrode is a
filament or resistance heated electrode which has a wire or
strand wound upon another filament or rod which is of a
different composition from the composition of the filament or
rod.
346 for this subject matter where the electrode is made of a
material containing or is coated with electron emissive
material or includes a body or mass of electron emissive
material which is at least partly enclosed by a support or
carrier which is permeable to electrons or to the electron
emissive material.
SEE OR SEARCH CLASS:
378, X-Ray or Gamma Ray Systems or Devices, where the
electrode is an X-ray target or anti-cathode.
428, Stock Material or Miscellaneous Articles, 548 for
composite metallic stock having metal particles, and
subclasses 615+ for other composite metallic stock.
Subclass:
353
This subclass is indented under subclass 352. Electrodes
where the electrode is provided with a part or section which
is formed of a material which will not sustain an electric
space discharge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
106 for discharge devices having means for preventing the
emission of secondary electrons, note subclass 107 where the
electrode is formed of or coated with a nonemissive
material.
Subclass:
354
This subclass is indented under subclass 352. Electrodes
where the electrode is formed in the shape of a rod, the rod
being provided with a core part which is formed of a material
which is of different composition from the material of which
the body part of the rod is composed.
(1) Note. This subclass includes cored rods designed for
use as arc lamp electrodes.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, 375 for a rod
which has a coating, impregnation or core.
Subclass:
355
This subclass is indented under subclass 352. Electrodes and
shields where, (1) the electrode is provided with a coating,
or (2) the electrode or shield is formed of a plurality of
laminations.
SEE OR SEARCH THIS CLASS, SUBCLASS:
329 where the electrode is a mosaic electrode.
336 where the electrode is electron emissive electrode and
is provided with a coating, the electrode being designed to
emit electrons only from a small point-like area.
337 where the electrode is an indirectly heated cathode.
345 where the electrode is a filament or resistance heated
electrode which is provided with a coating.
346 where the electrode is provided with an electron
emissive coating.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, 98 for a
stock material product in the form of a single or plural
layer which has structure (e.g., dimension or aperture),
subclasses 221+ for such a product embodying an element or
component which is structurally defined (e.g., porous or size
of fiber), subclasses 357+ for a structurally defined or
coated rod, strand, fiber, filament or other element, and
subclasses 411.1+ and 615+ for nonmetallic and metallic
composites, respectively, defined in terms of the composition
of their components.
Subclass:
356
This subclass is indented under subclass 326. Electrodes and
shields which are in the form of tubes or hollow sleeves.
SEE OR SEARCH THIS CLASS, SUBCLASS:
331 where the tubular or hollow sleeve electrode or shield
is provided with a lead wire or connector.
337 where the tubular or hollow sleeve electrode is part of
an indirectly heated cathode.
341 where the tubular or hollow sleeve electrode is a
filament or resistance heated electrode.
346 where the tubular or sleeve electrode is made of a
material containing or is coated with electron emissive
material or at least partially encloses a body or mass of
electron emissive material.
348 where the tubular or hollow sleeve is formed of
foraminous or open work material.
354 where the tubular or sleeve electrode contains a core
made of a different composition from the composition of the
tube or sleeve material.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
39.77 for discharge devices having a hollow tubular
electrode formed so as to provide a structure having
distributed inductance and capacitance (e.g., cavity
resonator), and operable in a magnetic field (e.g.,
magnetrons), and for the electrode, per se.
Subclass:
357
This subclass is indented under subclass 326. Electrodes and
shields which are in the form of rods.
(1) Note. Where no structure of the electrode or shield is
recited except that it is a rod formed of a particular
composition, the patent is excluded from Class 313 and will
be found in Class 252, Compositions, subclasses 502+ or one
of the classes specified in the notes to the definition of
those subclasses. See the class definition of Class 313.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for devices under the class definition which are
provided with a rod electrode and supporting and/or spacing
structure for the rod electrode. See indented subclass 267
where the device is provided with supporting and/or spacing
structure for a plurality of rod electrodes. See subclass
238 where the supporting structure for a single rod electrode
is claimed.
335 where the rod is provided with a lead wire or
connector.
341 for filaments and resistance heated electrodes.
SEE OR SEARCH CLASS:
428, Stock Material or Miscellaneous Articles, 364 for a rod
which is structurally defined or coated, and not elsewhere
provided for.
Subclass:
358
This subclass is indented under the class definition.
Miscellaneous subject matter which is not provided for in any
of the preceding subclasses in this class.
(1) Note. This subclass includes electrolytic light
sources.
SEE OR SEARCH THIS CLASS, SUBCLASS:
315 for miscellaneous incandescent lamps.
325 for miscellaneous discharge devices.
Subclass:
359.1
WITH POSITIVE OR NEGATIVE ION ACCELERATION:
This subclass is indented under the class definition.
Subject matter which are provided with means for generation
positive or negative ions and which are provided with means
to accelerate the ions.
(1) Note. Many of the devices in this subclass are provided
with means such as an ion transparent window for allowing
ions to emerge from the envelope of the discharge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
62 for cyclotrons.
230 for discharge devices which are provided with an
evacuated envelope and which have means for generating
positive ions.
231.01 for discharge devices with means for supplying fluent
material to the discharge space.
364 for cathode-ray tubes which may include means for
controlling or deflecting an electron beam.
567 for discharge devices which include an envelope and a
confined atmosphere of gas or vapor and which necessarily
generate positive ions in their operation.
588 for gas or vapor-type discharge devices which are
provided with an envelope having two portions, one of the
portions containing electrodes designed to generate an
ionizing discharge, the ionizing discharge supplying
electrons to an electrode in the second portion of the
device; the second portion being designed to operate with an
electronic discharge. The two portions of the envelope may
be separated by a barrier which is permeable to ions but
impermeable to the gas or vapor in the first envelope
portions.
SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 251 for devices for producing
and propagating a unidirectional stream of neutral molecules
or atoms through a vacuum, usually with thermal velocity;
subclasses 281+ for methods and apparatus for ionic
separation or analysis; especially subclass 288 which
includes a sample supply or invisible radiation responsive
gas; subclasses 379+ for discharge device apparatus which
includes means to supply the gas into the discharge device;
subclasses 396+ for means to deflect, scan, spread, or focus
a performed beam of ions; and subclasses 423+ for ion
generation methods and apparatus in which a material is
treated or irradiated.
315, Electric Lamp and Discharge Devices: Systems, 111.01
for discharge device load with fluent material supply to the
discharge space.
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, 510 for miscellaneous circuits which
are magnetically effected.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, subclass 210 for ion or electron beam
deflecting magnets, per se, and the search notes thereto for
combinations including such magnet means.
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, appropriate subclasses, especially 100 for the
utilization of a plasma in fusion reactions or where it is
intended to obtain a nuclear fusion reaction; and subclasses
156+ and apparatus for processes for changing the nucleus of
a substance by the use of ray energy including an ion beam.
Subclass:
360.1
Plural apertured electrodes:
This subclass is indented under subclass 359.1. Subject
matter including two or more apertured electrodes.
(1) Note. In general, the electrodes here are accelerating
electrodes.
Subclass:
361.1
Means for deflecting or focusing:
This subclass is indented under subclass 359.1. Subject
matter including means to deflect, scan, spread, or focus the
ions.
SEE OR SEARCH CLASS:
250, Radiant Energy, 396 for the deflection or focusing of a
preformed beam of ions.
Subclass:
362.1
Supplying ionizable material (e.g., gas or vapor):
This subclass is indented under subclass 359.1. Subject
matter including means for delivering an ionizable fluent
material to a discharge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
231.01 for means for supplying or directing fluent material
to a discharge device.
Subclass:
363.1
Extraction or target electrode:
This subclass is indented under subclass 359.1. Subject
matter including an electrode for removing or receiving
ions.
Subclass:
364
This subclass is indented under the class definition.
Subject matter including means to generate a beam of
electrons in the form of a ray or to exchange energy
therewith.
(1) Note. Cathode-ray tubes in general are characterized by
being provided with one or more focusing electrodes or
electromagnets for forming the electric space discharge into
a restricted beam or ray of elemental cross-section.
However, some cathode-ray tubes utilize the gas pressure
within the envelope of the discharge device to form the
cathode stream into a restricted pencil ray beam and such
devices are included in this and the indented subclasses.
(2) Note. This and the indented subclasses do not include
discharge devices of the so-called beam power type where the
sole means for forming the electron stream into a restricted
beam or ray is a plurality of grid electrodes or other
apertured electrodes between the cathode and anode, with the
apertures of the grid or other electrodes in alignment.
However, this and the indented subclasses do include
discharge devices similar in structure where in addition to
the plurality of grid or apertured electrodes, other means
(e.g., electrodes) are provided for the sole purpose of
forming the discharge into a restricted beam or ray. The
excluded subject matter will be found in subclass 299 of this
class.
(3) Note. This and the indented subclass do not include
discharge devices which are provided only with means for
varying the width of the electron stream and which do not
include any means whose purpose is to form the discharge into
a restricted beam or ray. See subclass 107.5, for the
excluded subject matter including discharge devices of the
"magic eye" type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2.1 for plural unit devices under the class definition where
one of the devices is a cathode-ray tube.
107.5 see (3) Note, above.
299 see (2) Note, above.
359.1 for discharge devices with means to accelerate
positive or negative ions.
SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 251 for neutron generators,
subclasses 281+ for methods and apparatus for mass
spectrometers which use discharge devices in the separation
and analysis of material, subclass 305 for methods and
apparatus for analyzing electrons by separating them on a
velocity or momentum basis, subclasses 306+ for the
inspection of solids or liquids by discharged particles and
particularly subclass 311 for electron microscopes,
subclasses 396+ for electron or ion beam deflection or
focussing, means, subclasses 440.11+ for object supports used
in charged particle inspection systems, subclasses 493.1+ for
evacuable chamber device with radiation detectors or detector
supports and subclasses 492.1+ methods and apparatus to
irradiate object or materials generally.
315, Electric Lamp and Discharge Devices: Systems, 3 for
cathode ray devices which have structurally combined
therewith a circuit element, (e.g., a switch, impedance,
cavity resonator, etc..).
347, Incremental Printing of Symbolic Information, 226 for
cathode-ray oscilloscopes (e.g., cathode-ray tubes having
means, such as photos:graphic film, to make a record of the
trace of the cathode ray), and subclasses 121+ for
electrostatic recorders using electron beam in an air tight
envelope for creating a charged pattern.
348, Television, 325 and 805+ for cathode-ray tubes utilized
in television systems in combination with optical elements,
supports, and specific circuitry peculiar to television.
378, X-Ray or Gamma Ray Systems or Devices, 121 for X-ray
tubes.
Subclass:
365
This subclass is indented under subclass 364. Subject matter
including structure responsive to electromagnetic radiation
or compressional waves.
(1) Note. Included here are structures which emit electrons
or change conductivity when irradiated with light, and
structures responding piezoelectrically to compressional
waves.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2.1 for plural unit devices within the class definition
which include a cathode ray device with a fluorescent screen
and a photosensitive device, the light emitted by the
fluorescent screen activating the photosensitive electrode.
346 and the classes and subclasses specified in the notes
thereto, for photo-emissive cathodes, per se.
523 for other photosensitive devices under the class
definition.
SEE OR SEARCH CLASS:
250, Radiant Energy, 330 and 361+ for light amplifiers
responsive to invisible radiation, subclass 213 for "light
amplifiers", i.e., devices having a photosensitive cathode,
and a fluorescent screen which is excited by the emission
from the cathode so that there is correspondence between the
light falling on the cathode and the light output of the
fluorescent screen, and subclasses 216+ for cathode-ray tubes
which are provided with a photosensitive electrode in
combination with a separable optical means for controlling
the light impressed upon the photosensitive electrode.
315, Electric Lamp and Discharge Devices: Systems, 10 for
systems for supplying electrical energy to cathode-ray tubes,
the system including light sensitive means to control the
operation of the cathode-ray tube. The cathode-ray tube in
the system may have a light sensitive electrode.
Subclass:
366
This subclass is indented under subclass 365. Subject matter
including a semiconductor depletion layer device responsive
to irradiation.
(1) Note. The barrier may be induced or formed by doping.
Subclass:
367
This subclass is indented under subclass 366. Subject matter
wherein the semiconductor depletion layer devices are
disposed in a mosaic.
(1) Note. The term mosaic is intended to include strips,
stripes, or bands.
Subclass:
368
This subclass is indented under subclass 367. Subject matter
wherein more than one depletion layer form an element of the
mosaic.
Subclass:
369
This subclass is indented under subclass 365. Subject matter
including structure responsive to pressure
(1) Note. Devices responsive to compressional waves are
included here.
Subclass:
370
This subclass is indented under subclass 365. Subject matter
including a conductive light previous film, layer or element
adjacent the responsive structure specified in terms of
chemical composition or construction.
Subclass:
371
This subclass is indented under subclass 365. Subject matter
including an optical element associated with the responsive
structure to filter, reflect, refract, or restrict light.
(1) Note. Included here are filters, masks, lenses,
reflectors and light conducting elements.
Subclass:
372
This subclass is indented under subclass 371. Subject matter
wherein the optical means conducts light by total internal
reflection.
(1) Note. The light conducting element is generally in the
form of a fiber or rod.
Subclass:
373
This subclass is indented under subclass 365. Subject matter
including a cathode element which emits electrons in response
to light.
Subclass:
374
This subclass is indented under subclass 373. Subject matter
wherein the photo-emissive cathode is formed of small
discrete emissive elements in a mosaic pattern.
(1) Note. A mosaic pattern includes strips, stripes, or
bands.
Subclass:
375
This subclass is indented under subclass 373. Subject matter
wherein the photo-emissive cathode is in the form of more
than one film, coating or layer on a substrate each being
photo-emissive.
Subclass:
376
This subclass is indented under subclass 373. Subject matter
including an electrode which receives the electron cloud
emitted by the photo-emissive cathode and forms a latent
electrical image corresponding to the image on the
photo-emissive cathode.
(1) Note. The target receives the cathode ray.
Subclass:
377
This subclass is indented under subclass 376. Subject matter
including means for providing electron multiplication at the
target in response to the electron cloud from the
photo-emissive cathode or means for providing electron
multiplication of electrons returning from the target.
(1) Note. The means providing the electron multiplication
at the target may be located between the photo-emissive
cathode and the target or be part of the target.
SEE OR SEARCH THIS CLASS, SUBCLASS:
379 for an electron multiplier receiving electrons returning
from the photo-emissive cathode.
Subclass:
378
This subclass is indented under subclass 376. Subject matter
including structure to support the target.
Subclass:
379
This subclass is indented under subclass 373. Subject matter
including an electron multiplier responding to electrons
returning from the photo-emissive cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
377 for an electron multiplier receiving electrons returning
from a target.
Subclass:
380
This subclass is indented under subclass 373. Subject matter
wherein the photo-emissive cathode is adapted to respond to
electromagnetic radiation other than visible light.
(1) Note. Included here is structure of or associated with
the cathode to make it particularly sensitive to, for
example, infrared radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
388 for photoconductive elements made sensitive to
particular frequencies of electromagnetic radiation.
Subclass:
381
This subclass is indented under subclass 373. Subject matter
including an aperture across which an electron cloud from the
photo-emissive cathode may be scanned, an elemental part of
the scanned cloud emanating as a ray from the opposite side
of the aperture.
Subclass:
382
This subclass is indented under subclass 373. Subject matter
including structure to focus the electron beam.
SEE OR SEARCH THIS CLASS, SUBCLASS:
389 for similar structure including a photo-conductive
element.
414 for plural beam generators with a focusing electrode.
442 for cathode-ray tubes with magnetic focus.
Subclass:
383
This subclass is indented under subclass 373. Subject matter
including an additional electrode or support for the
additional electrode or the photo-emissive cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
390 for similar subject matter with a photo-conductive
element.
Subclass:
384
This subclass is indented under subclass 365. Subject matter
including an element which changes in conductivity in
response to light.
Subclass:
385
This subclass is indented under subclass 384. Subject matter
wherein the photoconductive element is in the form of a layer
having a specified chemical composition.
Subclass:
386
This subclass is indented under subclass 385. Subject matter
wherein the photoconductive element is composed of plural
layers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
375 for plural photo-emissive layers forming the cathode.
Subclass:
387
This subclass is indented under subclass 384. Subject matter
including an element which emits electrons in response to
electrons reflected from the photoconductive element.
(1) Note. Included here are photomultipliers.
Subclass:
388
This subclass is indented under subclass 384. Subject matter
wherein the photoconductive element is adapted to respond to
electromagnetic radiation other than visible light.
(1) Note. Included here is structure of or associated with
the photoconductor to make it particularly sensitive to, for
example, infrared radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
380 for photo-emissive cathode made sensitive to particular
frequencies of electromagnetic radiation.
Subclass:
389
This subclass is indented under subclass 384. Subject matter
including structure to focus the cathode ray.
SEE OR SEARCH THIS CLASS, SUBCLASS:
382 for similar structure including a photo-emissive
cathode.
414 for plural beam generator with a focusing electrode.
442 for cathode-ray tubes with magnetic focus.
Subclass:
390
This subclass is indented under subclass 384. Subject matter
including an additional electrode or support for the
additional electrode or the photoconductive element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
383 for similar subject matter with a photo-emissive
cathode
417 for electrode support structure in a plural beam tube.
438 for means for supporting electrostatic deflection
structure.
456 for means for supporting an electrode in the electron
gun structure.
Subclass:
391
This subclass is indented under subclass 364. Subject matter
including an electrode capable of converting the energy from
a cathode ray to a charge distribution.
(1) Note. In general, a writing and reading cathode-ray
beam is required to place the charge on the storage electrode
and to derive information from it.
Subclass:
392
This subclass is indented under subclass 391. Subject matter
wherein the storage electrode is a depletion layer device.
(1) Note. The depletion layer may be induced or formed by
doping.
Subclass:
393
This subclass is indented under subclass 391. Subject matter
wherein the storage electrode is located intermediate two
electron guns with one gun on each side of the storage
electrode.
Subclass:
394
This subclass is indented under subclass 391. Subject matter
wherein the storage element is the anode or is contiguous
with the anode in the form of a separate continuous layer.
(1) Note. The continuous type storage element requires
scanning to read the stored charge distribution.
Subclass:
395
This subclass is indented under subclass 391. Subject matter
wherein the storage element is in the form of a mesh having
voids or a sheet having perforations and coated with a
storage material.
Subclass:
396
This subclass is indented under subclass 391. Subject matter
including means for flooding the storage electrode with
electrons.
Subclass:
397
This subclass is indented under subclass 391. Subject matter
including a display screen for providing an image
corresponding to the storage electrode charge distribution,
storage and display are effected by the same element or
contacting elements.
Subclass:
398
This subclass is indented under subclass 397. Subject matter
wherein storage and display are effected by the same element
or contacting elements.
Subclass:
399
This subclass is indented under subclass 364. Subject matter
which includes a secondary emissive electrode.
(1) Note. Included here are electron multipliers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
346 and the classes and subclasses specified in the notes
thereto for secondary emissive electrodes, per se.
377 379 and 387, for secondary emissive electrodes in pick-up
tubes.
391 for storage tubes which may include a secondary emissive
electrode.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
11, 12.1, for systems for supplying electrical energy to
cathode-ray tubes which include a secondary emissive
electrode.
329, Demodulators, appropriate subclasses, for demodulators
with secondary emission.
330, Amplifiers, subclass 42 for amplifiers having a
secondary emissive tube.
Subclass:
400
This subclass is indented under subclass 399. Subject matter
including an element producing a visual display in response
to electron irradiation from the secondary emissive
electrode.
Subclass:
401
This subclass is indented under subclass 399. Subject matter
wherein the emissive material is in the form of a picture or
symbol or the emissive material is masked to provide a signal
indicative of a picture or symbol.
(1) Note. The subject matter of this subclass is generally
for the purpose of providing a video signal of a test pattern
or the like.
Subclass:
402
This subclass is indented under subclass 364. Subject matter
including an electrode having apertures, correlated with
groups of color emissive elements of display screen,
structure securing the electrode, or electrode frame; or an
electron shield associated with the electrode or frame.
(1) Note. The nominal recitation of a supported or
unsupported shadow mask is not sufficient for classification
in this subclass.
Subclass:
403
This subclass is indented under subclass 402. Subject matter
wherein the shadow made has noncircular apertures.
Subclass:
404
This subclass is indented under subclass 402. Subject matter
including a resilient element securing the mask or mask frame
to the cathode ray device.
Subclass:
405
This subclass is indented under subclass 404. Subject matter
wherein the resilient support comprises dissimilar metals
associated in such a way as to move the mask in response to
temperature changes.
Subclass:
406
This subclass is indented under subclass 404. Subject matter
including studs to which the resilient elements are attached,
secured, or connected.
Subclass:
407
This subclass is indented under subclass 402. Subject matter
including a frame for supporting the shadow mask or shield.
Subclass:
408
This subclass is indented under subclass 402. Subject matter
including a phosphor screen.
Subclass:
409
This subclass is indented under subclass 364. Subject matter
including structure to produce or control a plurality of
electron beams.
(1) Note. These devices may have a plurality of beam
forming cathodes, each with beam forming means associated
therewith, or a single cathode with means associated
therewith for forming the discharge into a plurality of
separate beams directed severally toward different targets or
different parts of the same target.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2.1 for plural unit devices under the class definition which
include two cathode ray devices, each being provided with its
own beam forming means and provided with a separate target
for each beam.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 5.14 for
cathode-ray tube circuits which include a plurality of beam
forming cathodes and a hollow distributed parameter device
such as a wave guide, resonator, or co-axial line, the beams
formed by the cathodes passing through or in the device; and
subclasses 368.11+ for a cathode-ray device having
convergence control circuitry. See also (1) Note under
subclass 5.14 and subclasses 13.1+ for systems for supplying
electrical energy to cathode-ray tubes which are provided
with means for forming a plurality of separate cathode-ray
beams.
378, X-Ray or Gamma Ray Systems or Devices, subclass 134 for
X-ray devices under the class definition which include a
plurality of cathodes.
Subclass:
410
This subclass is indented under subclass 409. Subject matter
including means to define a pattern in the form of a number
or letter.
Subclass:
411
This subclass is indented under subclass 409. Subject matter
including means for deriving plural beams from a single
cathode.
Subclass:
412
This subclass is indented under subclass 409. Subject matter
including means for affecting the beam paths so that all
beams strike the same point.
Subclass:
413
This subclass is indented under subclass 409. Subject matter
including means for deflecting one or more beams.
(1) Note. Focusing is not considered deflection.
Subclass:
414
This subclass is indented under subclass 409. Subject matter
including means for focusing and accelerating one or more of
the electron beams.
Subclass:
415
This subclass is indented under subclass 409. Subject matter
including a fluorescent or phosphorescent screen.
Subclass:
416
This subclass is indented under subclass 415. Subject matter
including elements having subelements in more than one plane
which geometrically discriminate between or among electron
beams.
Subclass:
417
This subclass is indented under subclass 409. Subject matter
including means for supporting one or more, of the beam
generating or controlling electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
383 and 390, for electrode support structure in an image
pickup tube.
438 for means for supporting electrostatic deflection
structure.
456 for means for supporting an electrode in the electron
gun structure.
Subclass:
418
This subclass is indented under subclass 364. Subject matter
including an output electrode for supplying electrical
information which is a function of cathode intensity or
position.
Subclass:
419
This subclass is indented under subclass 418. Subject matter
including more than one output electrode.
Subclass:
420
This subclass is indented under subclass 364. Subject matter
having a window which is permeable to electrons so that the
electrons may pass through the window and out of the envelope
containing the discharge electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
317 for other devices under the class definition provided
with an electron permeable envelope.
359.1 for discharge devices under the class definition which
are provided with means for accelerating positive ions and
which may be provided with an ion transparent envelope.
588 for gas or vapor type discharge devices provided with
one chamber in which an ionizing discharge is adapted to be
maintained, an electron permeable barrier being provided so
that electrons from the ionizing discharge can pass into a
second chamber where an electronic discharge is designed to
be maintained.
SEE OR SEARCH CLASS:
220, Receptacles, 2.1, for envelopes, per se, for lamps and
discharge devices, note that subclass 2.3 provides for such
envelopes where a portion of the envelope is made of
conductive material.
250, Radiant Energy, 306 for methods and apparatus to
inspect solids or liquids by charged particles and subclasses
492.1+ for the irradiation of objects and material
generally.
Subclass:
421
This subclass is indented under subclass 364. Subject matter
having means to deflect the beam.
(1) Note. A pair of electrodes, one on each side of the
beam path so that a potential applied to them causes one to
attract and the other to repel the beam is considered to be a
single deflecting means. Two such pairs of electrodes each
pair operable separately of the other pair are considered to
constitute two deflecting means. In general any means
capable of deflecting the beam out of its path in a single
direction is considered a single deflecting means, and any
means capable of deflecting the beam out of its path in two
dimensions is considered to be plural deflecting means. Also
considered to be cathode-ray tubes with plural deflecting
means are cathode-ray tubes which are provided with means to
deflect the cathode ray into different directions in a single
plane.
(2) Note. This subclass includes cathode- ray tubes which
are provided with a single magnetic means for deflecting the
cathode ray.
(3) Note. For the classification of deflection magnets, per
se, see the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
153 for other discharge devices provided with magnetic means
for influencing the discharge.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 364 and
indented subclasses for electric systems for supplying
electric current and/or potentials to cathode-ray tubes,
which are provided with ray deflecting circuits, subclasses
393+ where the cathode ray is swept in different planes
(e.g., horizontal and vertical sweeping), subclasses 391+
where the cathode ray is merely deflected (e.g., bent) and
also swept in one plane or is swept in two different
directions in a single plane, and subclasses 399+ for the
systems for supplying electric currents to the deflecting
electromagnets of a cathode-ray tube.
331, Oscillators, subclass 80 for oscillator systems
utilizing a cathode-ray tube of the ray sweeping or
deflecting type.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 210 for magnetic deflecting or focusing
structure external to a cathode-ray tube.
Subclass:
422
This subclass is indented under subclass 421. Subject matter
wherein the deflection is greater than 110 degree or the
cathode ray is asymmetrically deflected.
(1) Note. The general purpose of these tubes is to minimize
the front to back dimension.
Subclass:
423
This subclass is indented under subclass 421. Subject matter
wherein the beam deflecting means causes the cathode ray to
have a vector component opposite to the direction it was
traveling before deflection.
SEE OR SEARCH THIS CLASS, SUBCLASS:
422 for deflection arrangements used in flat type tubes.
Subclass:
424
This subclass is indented under subclass 421. Subject matter
wherein ions are deflected out of the electron beam to
prevent undesirable effects.
Subclass:
425
This subclass is indented under subclass 421. Subject matter
wherein the deflecting means is utilized to center the
cathode ray beam.
Subclass:
426
This subclass is indented under subclass 421. Subject matter
including a plurality of beam deflecting means.
(1) Note. The plurality of deflecting means may deflect one
or more beams.
Subclass:
427
This subclass is indented under subclass 426. Subject matter
including three or more beam deflecting means.
(1) Note. The deflecting means may all be electrostatic,
all electromagnetic or may include both electrostatic and
electromagnetic.
SEE OR SEARCH THIS CLASS, SUBCLASS:
409 and in particular 413 for the deflection of plural
cathode rays.
Subclass:
428
This subclass is indented under subclass 427. Subject matter
including means for causing plural beams to intersect at a
specified point.
Subclass:
429
This subclass is indented under subclass 427. Subject matter
wherein the deflecting means is positioned near the viewing
screen.
(1) Note. Such placement of the deflecting means is termed
"post deflection".
Subclass:
430
This subclass is indented under subclass 429. Subject matter
wherein the deflecting means is located external to the
tube.
Subclass:
431
This subclass is indented under subclass 427. Subject matter
wherein at least two of the deflecting means are magnetic.
SEE OR SEARCH THIS CLASS, SUBCLASS:
440 for cathode-ray tube with yoke.
Subclass:
432
This subclass is indented under subclass 426. Subject matter
wherein at least two of the deflecting means provide
electrostatic attraction or repulsion of the cathode ray.
SEE OR SEARCH THIS CLASS, SUBCLASS:
439 for single electrostatic deflection means.
Subclass:
433
This subclass is indented under subclass 432. Subject matter
including magnetic deflecting means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
413 for means for deflecting plural beams.
431 for two or more magnetic means for deflecting the
electron beam.
440 for cathode-ray tube with yoke.
SEE OR SEARCH CLASS:
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 210 for magnetic deflecting or focusing
structure external to a cathode-ray tube.
Subclass:
434
This subclass is indented under subclass 432. Subject matter
wherein the deflecting members include plates or areas of
plate surfaces which are nonparallel or asymmetric.
Subclass:
435
This subclass is indented under subclass 434. Subject matter
wherein at least one surface of the deflecting means is
nonplanar.
Subclass:
436
This subclass is indented under subclass 432. Subject matter
wherein the deflecting means overlap each other or are
enclosed by other electrodes or shielding.
Subclass:
437
This subclass is indented under subclass 432. Subject matter
including means to correct distortion due to deflection.
Subclass:
438
This subclass is indented under subclass 432. Subject matter
including structure for supporting the deflecting means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
383 and 390, for electrode support structure in an image
pickup tube.
417 for electrode support structure in a plural beam tube.
456 for means for supporting an electrode in the electron
gun structure.
Subclass:
439
This subclass is indented under subclass 421. Subject matter
wherein the deflecting means provides electrostatic
attraction or repulsion of the cathode ray.
SEE OR SEARCH THIS CLASS, SUBCLASS:
432 for plural electrostatic deflection means.
Subclass:
440
This subclass is indented under subclass 421. Subject matter
including coil laminations surrounding the cathode ray to
provide deflection.
SEE OR SEARCH THIS CLASS, SUBCLASS:
413 for means for deflecting plural beams.
431 for two or more magnetic means for deflecting the beam.
433 for one or two magnetic means combined with
electrostatic means for deflecting the beam.
SEE OR SEARCH CLASS:
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 210 for means external of a cathode-ray
tube to deflect or form the beam.
Subclass:
441
This subclass is indented under subclass 364. Subject matter
including a cathode source of electrons, electrodes or
magnetic elements for controlling electron velocity or beam
cross section.
SEE OR SEARCH THIS CLASS, SUBCLASS:
409 for similar subject matter where more than one beam is
generated or controlled.
421 for similar subject matter including means for
deflecting the beam.
Subclass:
442
This subclass is indented under subclass 441. Subject matter
including magnetic means for defining beams cross-section.
Subclass:
443
This subclass is indented under subclass 442. Subject matter
wherein the magnetic focus structure forms part of or is
located within the envelope.
Subclass:
444
This subclass is indented under subclass 441. Subject matter
including a plurality of electrodes and one or more
insulating members serially disposed relative to the beam and
secured together in a contiguous fashion.
Subclass:
445
This subclass is indented under subclass 441. Subject matter
including an electrode or electrode surface positioned at an
acute angle with respect to a plane perpendicular to the
electron beam axis for the purpose of deflecting ions off
axis.
Subclass:
446
This subclass is indented under subclass 441. Subject matter
including a cathode.
Subclass:
447
This subclass is indented under subclass 446. Subject matter
including an electrode located immediately adjacent the
cathode for regulating the velocity of an electron or
electron beam density.
Subclass:
448
This subclass is indented under subclass 447. Subject matter
including an anode.
Subclass:
449
This subclass is indented under subclass 448. Subject matter
including an additional electrode.
Subclass:
450
This subclass is indented under subclass 449. Subject matter
wherein the additional electrode is a conductive coating on
the envelope wall or is a conductive helical wire.
Subclass:
451
This subclass is indented under subclass 448. Subject matter
including support structure for the anode.
Subclass:
452
This subclass is indented under subclass 446. Subject matter
including a focus electrode immediate the cathode.
Subclass:
453
This subclass is indented under subclass 452. Subject matter
wherein the focus electrode and cathode produce a beam that
is noncircular in cross-section.
Subclass:
454
This subclass is indented under subclass 452. Subject matter
wherein the cathode surface is curved.
Subclass:
455
This subclass is indented under subclass 454. Subject matter
wherein the cathode and associated electrodes produce a
hollow beam in which the electron density increases radially
from the beam center.
Subclass:
456
Subject matter under 441 including structure for supporting
an electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
383 and 390, for electrode support structure in an image
pickup tube.
417 for electrode support structure in a plural beam tube.
438 for means for supporting electrostatic deflection
structure.
Subclass:
457
This subclass is indented under subclass 456. Subject matter
wherein the support structure is in the form of an insulating
rod or rods supporting an electrode and extending parallel to
the electron beam.
Subclass:
458
This subclass is indented under subclass 441. Subject matter
including an electrode.
Subclass:
459
This subclass is indented under subclass 458. Subject matter
including structure to provide for movement of an electrode.
Subclass:
460
This subclass is indented under subclass 458. Subject matter
including more than one electrode.
Subclass:
461
This subclass is indented under subclass 364. Subject matter
including means for converting the energy of a cathode ray
into light or for modulating light in accordance with the ray
energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
483 for noncathode ray devices including a luminescent solid
or liquid material.
SEE OR SEARCH CLASS:
250, Radiant Energy, 483.1 for luminescent devices
responsive to invisible radiation.
348, Television, 744 for television projection devices that
may utilize a cathode-ray beam to modulate light.
Subclass:
462
This subclass is indented under subclass 461. Subject matter
including indicia on or embedded in the screen.
Subclass:
463
This subclass is indented under subclass 461. Subject matter
wherein the light output of the screen capable of
luminescence in an electric field is modified by a cathode
ray.
Subclass:
464
This subclass is indented under subclass 461. Subject matter
wherein the screen is of a material which incandesces when
heated by the bombardment of electrons.
SEE OR SEARCH THIS CLASS, SUBCLASS:
305 and the subclasses specified in the notes thereto for
other discharge devices under the class definition having
anodes adapted to be heated by the discharge.
347 and the subclasses specified in the notes thereto for
electrodes, per se, which are designed to be incandescible
upon electron bombardment.
Subclass:
465
This subclass is indented under subclass 461. Subject matter
in which the screen includes means to regulate the amount of
light which can pass through it; the regulation of the light
transmissibility of the screen being controlled by the
cathode ray.
SEE OR SEARCH THIS CLASS, SUBCLASS:
117 for other devices under the class definition which have
structurally combined therewith a light valve.
SEE OR SEARCH CLASS:
348, Television, 744 for television projection devices that
may use a cathode-ray beam to regulate the light
transmissibility of a screen, which screen regulates the
amount of light transmitted.
359, Optics: Systems (Including Communication) and Elements,
227 and 238+ for light valves, per se.
Subclass:
466
This subclass is indented under subclass 461. Subject matter
including a layer which is not luminescent overlying the
luminescent layer.
Subclass:
467
This subclass is indented under subclass 461. Subject matter
including a particular phosphor composition.
Subclass:
468
This subclass is indented under subclass 467. Subject matter
wherein the phosphor composition is formed from a rare earth
element.
Subclass:
469
This subclass is indented under subclass 467. Subject matter
including a face plate and the phosphors composition is
dispersed in the face plate material.
Subclass:
470
This subclass is indented under subclass 461. Subject matter
including discrete phosphor elements arranged in a mosaic
pattern.
Subclass:
471
This subclass is indented under subclass 470. Subject matter
including a phosphor positioned on the screen which when
excited gives an indication of the position of the electron
beam.
(1) Note. In operation light from the beam indexing element
or elements is generally received by a detector.
Subclass:
472
This subclass is indented under subclass 470. Subject matter
wherein the mosaic is a dot pattern.
Subclass:
473
This subclass is indented under subclass 461. Subject matter
wherein the screen comprises more than one light-generating
or modulating layers.
Subclass:
474
This subclass is indented under subclass 461. Subject matter
including optical means combined with the screen.
Subclass:
475
This subclass is indented under subclass 474. Subject matter
wherein the optical means includes a light conducting fiber
or rod which conducts light by total internal reflection.
Subclass:
476
This subclass is indented under subclass 461. Subject matter
including means for securing the screen relative to the
cathode ray device.
Subclass:
477
This subclass is indented under subclass 364. Subject matter
including an envelope.
Subclass:
478
This subclass is indented under subclass 477. Subject matter
including optical means external of the envelope for
reflecting, refracting, or transmitting light.
Subclass:
479
This subclass is indented under subclass 477. Subject matter
including means for protecting the envelope or preventing
radiation from entering or leaving the envelope.
Subclass:
480
This subclass is indented under subclass 477. Subject matter
wherein the chemical composition of the envelope is
specified.
Subclass:
481
This subclass is indented under subclass 477. Subject matter
including means to increase the degree of vacuum or including
a gas.
Subclass:
482
This subclass is indented under subclass 477. Subject matter
including means integral with and internal the envelope for
supporting or attaching electrodes or means integral with and
external the envelope particularly adapted for mounting the
envelope or for supporting deflecting structure thereof.
Subclass:
483
This subclass is indented under the class definition.
Subject matter which include a liquid or solid material that
produces radiant energy in response to excitation.
(1) Note. Included here, for example, are
electroluminescent and electrochemiluminescent devices.
(2) Note. See the class definition for fluorescent and
phosphorescent screens, coatings, and compositions, and the
method for coating bases with fluorescent or phosphorescent
materials.
SEE OR SEARCH THIS CLASS, SUBCLASS:
461 for cathode ray devices having a fluorescent screen.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems,
appropriate subclasses, for electric systems for supplying
electric energy to electric lamps which are provided with a
fluorescent or phosphorescent material. Note that systems
for supplying electric energy to electronic tubes which are
provided with a fluorescent or phosphorescent material for
the purpose of emitting light are considered to be lamp
systems classified in Class 315.
345, Computer Graphics Processing, Operator Interface
Processing, and Selective Visual Display Systems, subclass
36, 37, 41+, 44+, 47, 60+, 73, 74+, 76+, and 82+ for
selective electrically controlled visual display systems.
362, Illumination, subclass 84 for illuminating devices
which have combined therewith a fluorescent or phosphorescent
material.
Subclass:
484
This subclass is indented under subclass 483. Subject matter
including a gaseous medium in which a discharge is
developed.
Subclass:
485
This subclass is indented under subclass 484. Subject matter
which includes an envelope and fluorescent or phosphorescent
material applied to or embedded in the wall of the envelope.
(1) Note. The fluorescent or phosphorescent material may be
in direct contact with the envelope wall or separated from it
by a layer or coating on the envelope for example, a phosphor
layer overlying a protective layer disposed directly on the
envelope wall.
(2) Note. The fluorescent or phosphorescent material may be
applied as a coating to either the interior or the exterior
of the envelope.
(3) Note. Included here are devices having two envelopes
where the fluorescent or phosphorescent material may be
applied to or embedded in either envelope wall, however,
generally a high pressure discharge tube is enclosed and
supported within a sealed outer envelope which is internally
coated with a phosphor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
461 for cathode-ray tubes which have a florescent or
phosphorescent material applied to the envelope wall.
Subclass:
486
This subclass is indented under subclass 485. Subject matter
wherein the chemical composition, size, shape, or optical
property of the phosphor is specified.
Subclass:
487
This subclass is indented under subclass 486. Subject matter
wherein there are plural phosphors.
Subclass:
488
This subclass is indented under subclass 485. Subject matter
wherein an aperture or discontinuity is provided in the
fluorescent or phosphorescent layer or coating or wherein
some other means is provided to permit or direct light from
the interior of the envelope.
Subclass:
489
This subclass is indented under subclass 485. Subject matter
including a film, coating, or element on the envelope or the
fluorescent or phosphorescent material for protection or an
optical filter to limit the frequency of the emitted light.
Subclass:
490
This subclass is indented under subclass 485. Subject matter
wherein mercury or an alloy of mercury with another metal is
provided within the envelope to maintain the mercury-vapor
pressure.
Subclass:
491
This subclass is indented under subclass 485. Subject matter
including one or more electrodes having a particular
structure or chemical composition.
Subclass:
492
This subclass is indented under subclass 491. Subject matter
including an additional electrode or shielding structure
mounted adjacent an electrode to protect either the
electrode, the envelope, or the fluorescent or phosphorescent
coating.
(1) Note. The additional electrode may be a starting
electrode.
Subclass:
493
This subclass is indented under subclass 485. Subject matter
wherein the envelope has a particular configuration or
chemical composition.
Subclass:
494
This subclass is indented under subclass 483. Subject matter
wherein the electrodes are in the same plane.
Subclass:
495
This subclass is indented under subclass 483. Subject matter
including an evacuated envelope, a fluorescent or
phosphorescent material within the envelope, an electron
source, and an anode cooperating to bombard the fluorescent
or phosphorescent material.
Subclass:
496
This subclass is indented under subclass 495. Subject matter
wherein the anode is segmented and wherein the fluorescent or
phosphorescent material is applied to the segments.
Subclass:
497
This subclass is indented under subclass 496. Subject matter
including an electrode between cathode and anode segments to
direct or permit electrons to strike a particular segment.
Subclass:
498
This subclass is indented under subclass 483. Subject matter
in which the luminescent material is an insulating material
that emits light based on the principle of intrinsic
luminescence, i.e., where an applied electric field generates
free carriers in the device (since the material, being an
insulator, has no free carriers to be accelerated by the
applied field) to initiate light emission mechanism(s) in the
material, or other solid-state material (e.g., semiconductor)
which either operates by a mechanism not `elsewhere
classified, or only nominally recites a mechanism (e.g.,
injection luminescence) elsewhere classified.
(1) Note. Intrinsic luminescence is to be distinguished
from injection luminescence, the latter being the mechanism
of operation of incoherent luminescent active solid state
devices which are properly classified as ORs in Class 257.
Typical injection luminescence devices include pn junctions
(including), Schottky barriers, metal-insulator-semiconductor
(MIS) structures, and traveling high speed domains, e.g.,
Gunn domain and acoustoelectric wave generated domains.
(2) Note. When structural details of an incoherent light
emitting injection solid-state type luminescent element are
claimed, classification as an original (OR) is in Class 257.
(3) Note. When structural details of a coherent light
emitting solid-state type luminescent element are claimed,
classification as an original (OR) is in Class 372.
SEE OR SEARCH CLASS:
257, Active Solid-State Devices (e.g., Transistors,
Solid-State Diodes), subclass 10, 11, 21, 53-56, 113-118,
184-189, 225-234, 257, 258, 290-294, and 414-466 for
radiation-sensitive active semiconductors injection
luminescent devices, and subclasses 613+ for active
semiconductor injection luminescent devices containing group
II-VI compounds.
Subclass:
499
This subclass is indented under subclass 498. Subject matter
in which the solid-state luminescent material is a
semiconductor that emits light based on the principle of
intrinsic luminescence, e.g., pn junction semiconductor
type.
(1) Note. This subclass is limited to subject matter with
only nominal recitation of a luminescent element, i.e., with
no significant structural details thereof, but with
recitation of details of a light modifier, envelope,
encapsulation, header, or other peripheral feature.
SEE OR SEARCH CLASS:
427, Coating Processes, 64 for fluorescent or phosphorescent
base coating, subclasses 74+ for a coating process to form a
photoemissive element, and subclasses 77+ for a coating
process to form an electron emissive element.
438, Semiconductor Device Manufacturing: Process, subclass 29
for methods of making a semiconductor solid-state device
having combined therewith a luminescent material layer.
Subclass:
500
This subclass is indented under subclass 499. Subject matter
including a plurality of semiconductor luminescent material
devices disposed in a regular spaced relationship in two or
more dimensions with respect to each other.
SEE OR SEARCH CLASS:
345, Computer Graphics Processing, Operator Interface
Processing, and Selective Visual Display Systems, 44 and 82+
for selective electrically controlled visual display
systems.
Subclass:
501
This subclass is indented under subclass 499. Subject matter
including another luminescent material which emits light in
response to being irradiated by light from the semiconductive
luminescent material device.
Subclass:
502
This subclass is indented under subclass 498. Subject matter
including a material in which a phosphor is implanted.
Subclass:
503
This subclass is indented under subclass 498. Subject matter
wherein the phosphor or electrode composition is specified.
Subclass:
504
This subclass is indented under subclass 503. Subject matter
wherein the phosphor is an organic compound.
Subclass:
505
This subclass is indented under subclass 498. Subject matter
including a plurality of electrodes between which the
luminescent material is disposed and wherein at least some of
the electrodes are arranged in rows and columns.
Subclass:
506
This subclass is indented under subclass 498. Subject matter
including more than one layer of material disposed between
two electrodes and wherein one of the layers is luminescent.
(1) Note. The plural layers may, for example, be two or
more luminescent layers.
Subclass:
507
This subclass is indented under subclass 506. Subject matter
including a photosenstive layer.
(1) Note. The photosensitive layer may be photoconductive
or photo-emissive.
Subclass:
508
This subclass is indented under subclass 506. Subject matter
including a piezoelectric layer.
Subclass:
509
This subclass is indented under subclass 506. Subject matter
including a dielectric layer.
Subclass:
510
This subclass is indented under subclass 498. Subject matter
including an electrode in the shape of a character or wherein
the luminescent material is so shaped.
SEE OR SEARCH CLASS:
345, Computer Graphics Processing, Operator Interface
Processing, and Selective Visual Display Systems, 33 for
selective electrically controlled visual display systems
having segmented display elements.
Subclass:
511
This subclass is indented under subclass 498. Subject matter
including two electrodes between which the luminescent
material is disposed and wherein the electrodes and
luminescent material are flexible.
Subclass:
512
This subclass is indented under subclass 498. Subject matter
including protective envelope or encapsulation means
surrounding the luminescent material.
Subclass:
513
This subclass is indented under the class definition.
Subject matter including an indicia or indicating scale
formed on or within the envelope of the device.
(1) Note. The filament or electrodes of the device may be
formed into the shape of indicia or have indicia or a scale
formed thereon.
(2) Note. See the class definition for the classification
of electric lamps including those of the discharge device
type, and cathode ray discharge devices combined with a
separable support for the lamp or discharge device (e.g.,
electric signs which include a lamp and a mounting panel).
(3) Note. See the class definition for the classification
of electric lamps, including those of the discharge device
type, and cathode ray discharge devices combined with a
separable casing or jacket for the lamp or discharge device
(e.g., electric signs which include a lamp and a casing,
oscillographs with casings).
(4) Note. See the class definition for the classification
of electric lamps including those of the discharge device
type and cathode ray discharge devices in combination with a
separable optical device (e.g., mirror, reflector, etc..),
for the lamp or discharge device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
107.5 for variable width electron stream discharge device
which have a fluorescent screen or other anode having a scale
or indicia formed thereon (e.g., magic eye-type tubes).
462 for cathode-ray tubes which are provided with targets or
ray receiving means which have a scale or indicia formed
thereon.
SEE OR SEARCH CLASS:
40, Card, Picture, or Sign Exhibiting, 541 for illuminated
signs which include electric lamps of the type classified in
this subclass in Class 313 in combination with separable sign
supporting structure for the lamp.
315, Electric Lamp and Discharge Devices: Systems,
appropriate subclasses, for miscellaneous systems, for
supplying electrical energy to electric lamps and gas or
vapor type discharge devices, including such lamps and
discharge devices as have indicia as a part thereof.
324, Electricity: Measuring and Testing, subclass 122 for
spark gaps having scales for indicating the separation of the
electrodes, and designed for use as voltmeters.
345, Computer Graphics Processing, Operator Interface
Processing, and Selective Visual Display Systems, 33 for
selective electrically controlled visual display systems
having segmented display elements.
Subclass:
514
This subclass is indented under subclass 513. Subject matter
including a gaseous medium in which a discharge may take
place.
Subclass:
515
This subclass is indented under subclass 514. Subject matter
including an envelope in the shape of a character confining
the gaseous discharge medium.
Subclass:
516
This subclass is indented under subclass 514. Subject matter
including at least one electrode having a character shaped
aperture.
Subclass:
517
This subclass is indented under subclass 514. Subject matter
including a plurality of electrode segments which form a
character.
Subclass:
518
This subclass is indented under subclass 517. Subject matter
including a dielectric (insulating) layer of material between
electrode segments.
Subclass:
519
This subclass is indented under subclass 517. Subject matter
including a plurality of character displays juxtaposed.
Subclass:
520
This subclass is indented under subclass 514. Subject matter
including a display electrode wherein a single electrode is
in the shape of a character.
Subclass:
521
This subclass is indented under subclass 520. Subject matter
including a plurality of integrant display electrodes
arranged one behind the other.
Subclass:
522
This subclass is indented under subclass 513. Subject matter
including a filament in the shape of a character.
Subclass:
523
PHOTOSENSITIVE:
This subclass is indented under the class definition.
Subject matter which includes an electric lamp or discharge
device having an electrode or electrical element which will
react photoelectrically to electromagnetic radiation of the
visible and certain invisible types not classified
elsewhere.
(1) Note. "Photoelectric" is the effect of electromagnetic
radiation on material which causes photoconductive,
photoemissive, photovoltaic and photoelectromagnetic
effects.
(2) Note. Included are lamp or discharge devices responsive
to X-ray, ultraviolet, visile and infrared radiation.
(3) Note. Also included are subcombinations of an electric
lamp or discharge device having a photosensitive member,
incomplete photosensitive devices of this class which will
react photoelectrically when completed and photocathodes not
classified else where.
(4) Note. Included are photocathodes, per se.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1 for a structurally combined lamp and discharge device,
plural lamps or plural discharge devices.
7 for a lamp or discharge device with a vacuum pump.
11 for a lamp or discharge device with a temperature
modifier.
54 for a lamp or discharge device with radioactive
material.
93 for a geiger-mueller counter tube.
373 for a cathode-ray tube with a photoemissive cathode.
384 for a cathode-ray tube with a photoconductive cathode.
SEE OR SEARCH CLASS:
65, Glass Manufacturing, 138 for electronic envelope header,
terminal or stem making means.
136, Batteries: Thermoelectric and Photoelectric, 243 for a
photoelectric device, particularly subclass 254 for
photoemissive devices.
148, Metal Treatment, 317 for coated stock material which
can be a photocathode.
204, Chemistry: Electrical and Wave Energy, 192.1 for
forming a photosensitive member by cathode sputtering.
220, Receptacles, subclass 2.1 for an envelope of an
electric lamp or similar device.
250, Radiant Energy, subclass 200 for photocell circuits and
apparatus, subclasses 330+ for infrared to visible imaging,
and subclasses 336.1+ for invisible radiant energy responsive
electric signalling.
252, Compositions, subclass 501.1 for light sensitive
electrically conductive or emissive compositions.
257, Active Solid-State Devices (e.g., Transistors,
Solid-State Diodes), subclass 10, 11, 21, 53-56, 113-118,
184-189, 225-234, 257, 258, 290-294, and 414-466 for
radiation-sensitive active semiconductor devices, subclasses
13, 79-103, and 918 for incoherent light emitting injection
luminescent devices, subclasses 80-85 for semiconductor light
emitting sources combined with semiconductor light responsive
devices, and subclasses 613+ for active semiconductor
injection luminescent devices containing group II-VI
compounds.
307, Electrical Transmission or Interconnection Systems,
subclass 117 for switching systems responsive to light or
radiant energy.
315, Electric Lamp and Discharge Devices: Systems, 149 for
such a system with radiant energy sensitive control means.
318, Electricity: Motive Power Systems, subclass 640 for
photoelectric or optical error detecting positional servo
systems, and subclass 480 for radiant energy responsive
automatic and/or with time delay means motive power systems.
324, Electricity: Measuring and Testing, 403 for electric
lamp or discharge device testing.
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, 514 for miscellaneous circuits
responsive to light.
331, Oscillators, subclass 66 for a light responsive
oscillator.
338, Electrical Resistors, 15 for electric resistors which
change resistance responsive to electromagnetic radiation.
348, Television, appropriate subclasses.
356, Optics: Measuring and Testing, particularly 402 for
testing shade or color and subclasses 213+ for photometers.
361, Electricity: Electrical Systems and Devices, 173 for
control circuits for electromagnetic devices including light
responsive control circuits.
378, X-Ray or Gamma Ray Systems or Devices, 1 for specific
applications.
396, Photography, 213 for a photos:graphic exposure control
circuit which is light responsive.
427, Coating Processes, 74 for processes of making
photocathodes by coating a base and subclasses 160+ for
X-ray, ultraviolet or infrared responsive coatings.
428, Stock Material or Miscellaneous Articles, 98 for a
structurally defined web or sheet which may have
photosensitive properties.
438, Semiconductor Device Manufacturing: Process, subclass 20
for methods of making semiconductor-based electron emitters,
subclasses 22+ for methods of making light emissive
semiconductor devices, and subclasses 57+ for methods of
making light responsive semiconductor devices.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, 1 for a method of manufacture, repair or
salvage and subclasses 66+ for apparatus used in manufacture,
repair or salvage
455, Telecommunications, subclass 600 for light wave
communications.
Subclass:
524
With optical device:
This subclass is indented under subclass 523. Subject matter
wherein the lamp or discharge device includes an optical
element of the physical type integral therewith.
(1) Note. See the class definitions for an optical device
not integral with a Class 313 device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for electric lamp or discharge with an integral optical
device or special ray transmissive envelope.
371 for a cathode-ray tube with an optical element.
SEE OR SEARCH CLASS:
250, Radiant Energy, 216 for optical or photocell systems.
348, Television, 195 for mechanical optical scanning.
356, Optics: Measuring and Testing, particularly 73.1 for
optical fiber testing, 124 for a lens or reflective image
former testing and subclasses 128+ for refraction testing.
359, Optics: Systems (Including Communication) and Elements,
350 for optics having significant infrared or ultraviolet
properties, subclasses 838+ for a reflector, subclasses 885+
for a filter, subclasses 642+ for a lens.
362, Illumination, subclass 551 for a light source and
modifier and subclasses 317+ for a light modifier.
378, X-Ray or Gamma Ray Systems or Devices, subclass 140 for
an X-ray discharge device having a special ray transmissive
window.
385, Optical Waveguides, appropriate subclasses for a light
transmitting fiber, waveguide or rod.
Subclass:
525
Having phosphor screen:
This subclass is indented under subclass 523. Subject matter
wherein the lamp or discharge device includes within an
envelope a photoemissive cathode or element which responds to
electromagnetic radiation to emit electrons and a phosphor
screen which converts, (1) the electrons emitted by the
electrode or device into electromagnetic radiation, or (2)
electromagnetic radiation into different electromagnetic
radiation to which the electrode or member is responsive to
emit electrons.
(1) Note. The envelope is transmissive to electromagnetic
radiation received through it from outside the envelope and
transmissive of the electromagentic radiation released by the
screen from the inside of the envelope.
(2) Note. See the class definitions, "Fluorescent and
Phosphorescent Coating and Compositions" for a classification
of such fluorescent and phosphorescent compositions,
coatings, methods of coating and electrical devices using the
same.
SEE OR SEARCH THIS CLASS, SUBCLASS:
461 for cathode-ray tube with phosphor screen.
483 for an electric lamp or discharge device with a
luminescent solid or liquid material.
SEE OR SEARCH CLASS:
216, Etching a Substrate: Processes, subclass 25 for the
manufacturing of a phosphor screen involving etching.
250, Radiant Energy, 213 for light amplifier circuits,
subclasses 337+ for invisible radiant energy responsive
signalling with heating of luminophors, subclasses 361+ for
invisible radiant energy responsive electric signalling
including a luminophor, particularly subclass 366 having
plural or composite phosphors, subclasses 458.1+ for a
radiation source and a luminophor responsive to the source
and subclasses 483.1+ for nonelectrical luminescent devices,
per se, which detect invisible radiation.
252, Compositions, subclass 301.16 for organic luminescent
material containing compositions, subclass 301.36 for
inorganic luminescent compositions with organic
nonluminescent material and subclasses 301.4+ for inorganic
luminescent compositions.
362, Illumination, subclass 34 for chemiluminescent light,
subclass 84 for a light source or light source support and
luminescent material and subclass 260 for a fluorescent type
light source or light source support and modifier.
378, X-Ray or Gamma Ray Systems or Devices, subclass 42 for
stereofluoroscopy and subclasses 44+ for fluorescent
applications.
427, Coating Processes, 64 for coating processes, per se,
wherein the product is an electrical product with a
fluorescent or phosphorescent base or coating.
Subclass:
526
Proximity focus type:
This subclass is indented under subclass 525. Subject matter
wherein the electrode is a photocathode having an extensive
area so that an electromagnetic radiation image external to
the device may be projected onto the photocathode, through
the envelope, to emit electrons in the shape of the
electromagentic radiation image and the screen is placed
close enough to the cathode so that no focusing is required
to have the electron image impact the screen.
Subclass:
527
Photocathode responsive to phosphor:
This subclass is indented under subclass 525. Subject matter
wherein the phosphor screen is responsive to electromagnetic
radiation hitting the phosphor to convert the radiation to a
lower frequency of radiation to which the photoemissive
cathode is responsive, the lower frequency electromagnetic
radiation upon hitting the photoemissive cathode causes the
photoemissive cathode to emit electrons in the response to
the lower frequency.
Subclass:
528
With electron multiplier:
This subclass is indented under subclass 525. Subject matter
which includes between the photoemissive cathode and the
phosphor screen an electrode which emits, upon being hit by
an electron emitted by the photoemissive cathode, a plurality
of secondary electrons to increase the magnitude of the
electron current which impact on the phosphor screen.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103 for a secondary emitter type discharge device.
399 for a cathode-ray tube having a secondary emissive
electrode.
SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 207 for a circuit having a
photocell with an electron multiplier.
329, Demodulators, appropriate subclass 359 for a
demodulator using secondary emission.
330, Amplifiers, subclass 42 for an amplifier with a
secondary electron emission amplifying device.
Subclass:
529
With control electrode:
This subclass is indented under subclass 525. Subject matter
which includes between the photoemissive cathode and the
phosphor screen an electrical element to control the
photoemissive electrons emitted by the cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103 for a secondary emitter type lamp or discharge devices.
399 for a cathode-ray tube with a secondary emissive
electrode.
532 for a photosensitive lamp or discharge device having a
secondary electron emissive electrode.
SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 207 for a photocell controlled
circuit having a secondary emissive electron multiplier.
329, Demodulators and Detectors, 148 for a demodulator and
detector with secondary emission.
330, Amplifiers, subclass 42 for an amplifier with secondary
electron emission tube amplifying device.
Subclass:
530
With photocathode on envelope:
This subclass is indented under subclass 525. Subject matter
wherein the photoemissive cathode is on the envelope wall.
Subclass:
531
Having plural photosensitive electrodes:
This subclass is indented under subclass 523. Subject matter
wherein the lamp or discharge device includes a plurality of
photosensitive electrodes within a common envelope.
(1) Note. Included here are a plurality of photosensitive
cathodes with one or more anodes within a common envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
329 for a photosensitive mosaic electrode, per se.
375 for a cathode-ray tube with plural photoemissive
layers.
SEE OR SEARCH CLASS:
250, Radiant Energy, 208.2 for a photocell controlled
circuit having plural photocells or plural photosensitive
electrodes.
Subclass:
532
Photomultiplier:
This subclass is indented under subclass 523. Subject matter
wherein the discharge device includes a secondary electron
emissive electrode which emits secondary electrons as a
result of the photoelectrons from a photocathode hitting the
secondary electron emissive electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103 for secondary emitter type electric lamp or discharge
device.
399 for a cathode-ray tube with a secondary emissive
electrode.
538 for gas phototubes wherein the ionized gas is an
electron secondary emission multiplier.
SEE OR SEARCH CLASS:
250, Radiant Energy, subclass 207 for a photocell controlled
circuit with an electron multiplier.
315, Electric Lamp and Discharge Devices: Systems, subclass
11 for cathode-ray tube circuits with radiant energy
sensitive control means having a secondary emission stage in
the cathode-ray tube, and subclass 12.1 for a cathode-ray
tube with a secondary emission stage in the cathode-ray
tube.
329, Demodulators, subclass 359 for such a device with
secondary emission.
330, Amplifiers, subclass 42 for an amplifier with a
secondary electron emission amplifying device.
Subclass:
533
Having plural dynodes:
This subclass is indented under subclass 532. Subject matter
wherein there are a plurality of secondary emissive
electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for a lamp or discharge device having plural secondary
emissive electrodes.
Subclass:
534
Channel or circular type:
This subclass is indented under subclass 533. Subject matter
including, (1) a plurality of passageways to direct the
photoelectrons emitted by the photocathode and each
passageway has a surface which emits secondary electrons as a
result of the photoemitted electrons hitting the secondary
electron emissive surface in its travel through the
passageway, or (2) plural dynodes placed serially in a
circular manner.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103 for a lamp or discharge device having a channel
multiplier.
105 for a lamp or discharge device with three or more
channel multipliers.
Subclass:
535
Venetian blind type:
This subclass is indented under subclass 533. Subject matter
wherein there are a plurality of spaced slat-like secondary
electron emissive electrodes at an angle to the direction of
movement of photoemissive electrons emitted by the
photoemissive cathode.
Subclass:
536
Box or linear type:
This subclass is indented under subclass 523. Subject matter
wherein there are plural serial secondary electron electrodes
wherein, (1) there are two successive box-like secondary
electroemissive electrodes alternately on each side of an
imaginary plane, or (2) there is a secondary electron
emissive electrode alternately on each side of an imaginary
plane.
Subclass:
537
Having a control electrode:
This subclass is indented under subclass 523. Subject matter
including an electrical element to control the electrical
current flow in the operation of the lamp or discharge
device.
(1) Note. In addition to electrodes to control the current
produced by the lamp or discharge device, there are elements
which emit electrons under the action of radiation to control
the current produced by the lamp or discharge device.
(2) Note. The term "control" includes the rate of current
flow, the focusing of the current in the device, and
separation of positive ions resulting from gas bombarment
within the device.
(3) Note. The control electrode may be photosensitive
rather than acting in an electrostatic manner to influence
the current within the device. The control electrode can be
controlled by photosensitive means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
308 for discharge device including a control electrode.
SEE OR SEARCH CLASS:
250, Radiant Energy, 222.1 for photocell circuit or
apparatus.
315, Electric Lamp and Discharge Devices: Systems, 149 for
systems having a lamp or discharge device to control a lamp
or discharge device.
Subclass:
538
Gas phototube:
This subclass is indented under subclass 523. Subject matter
wherein there is an ionizable gas within an envelope and the
electrode is photoemissive so that photoelectrons hitting the
gas causes the gas to ionize to release additional
electrons.
SEE OR SEARCH THIS CLASS, SUBCLASS:
532 for a vacuum tube photomultiplier.
567 for a lamp or discharge device having gas or vapor.
SEE OR SEARCH CLASS:
250, Radiant Energy, 200 for a gas phototube circuit or
apparatus, subclasses 374+ for invisible radiant energy
responsive electric signalling device having a gas responsive
to the invisible radiant energy rather than a photocathode.
315, Electric Lamp and Discharge Devices: Systems, 149 for
an electric lamp or discharge device system including a
radiant energy sensitive control means.
Subclass:
539
Responsive to ultraviolet radiation:
This subclass is indented under subclass 523. Subject matter
wherein the electrode is a photoemissive cathode responsive
to ultraviolet radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for a lamp or discharge device with an optical device or
a special ray transmissive envelope.
SEE OR SEARCH CLASS:
250, Radiant Energy, 372 for an invisible radiant energy
responsive electric signalling system having ultraviolet
responsive means.
Subclass:
540
Having plural anodes or cathodes:
This subclass is indented under subclass 523. Subject matter
wherein the lamp or discharge device includes a plurality of
anodes or cathodes within a common envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
302 for discharge devices with an apertured electrode
interposed between two electrodes where there are plural
cathodes.
303 for discharge devices with an apertured electrode
interposed between two electrodes where there are plural
anodes.
306 for other discharge devices having a plurality of anodes
or cathodes.
SEE OR SEARCH CLASS:
250, Radiant Energy, 208.2 for photocell controlled circuit
having plural anodes or cathodes.
Subclass:
541
Having photocathode on tube wall:
This subclass is indented under subclass 523. Subject matter
wherein the photoemissive cathode is on the envelope wall.
SEE OR SEARCH THIS CLASS, SUBCLASS:
530 for a photosensitive lamp or discharge device having a
phosphor screen and a photocathode on the lamp or discharge
envelope.
538 for a gas phototube having a photocathode on the
envelope wall.
544 for a photocathode combined with an envelope.
SEE OR SEARCH CLASS:
427, Coating Processes, 74 for photoelectric coating on a
member which is an electrical product.
Subclass:
542
Photocathode:
This subclass is indented under subclass 523. Subject matter
wherein the electrode absorbs infrared, visible, or
ultraviolet electromagnetic radiation so that some of the
electrons of the material absorb enough energy as a result of
the electromagnetic radiation to escape from the surface of
the material.
(1) Note. Photocathodes claimed as bases with coatings or
layers which emit electrons upon irradiation by
electromagnetic radiation of the ultraviolet, visible,
infrared light are classified here.
(2) Note. See the class definition for a discussion on
electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
326 for an electrode, per se, which may be a photocathode or
photosensitive and used in a lamp or discharge device,
particularly subclass 329 for mosaic electrodes which
includes photosensitive mosaic electrodes.
329 for mosaic photosensitive electrodes.
365 for a cathode-ray tube with a photosensitive electrode.
367 for cathode-ray tubes having mosaic potosensitive
electrodes.
SEE OR SEARCH CLASS:
140, Wireworking, subclass 71.5 for electric lamp or
discharge device electrode making or forming.
148, Metal Treatment, 317 for coated stock material.
252, Compositions, subclass 501.1 for electrically emissive
photosensitive compositions.
427, Coating Processes, 74 for photoelectric coating
processes.
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, 35 for processes of assembling an electrode,
subclasses 46+ for processes of making an electrode and
subclasses 60+ for corresponding apparatus, especially
subclass 67 for electrode assembly means.
Subclass:
543
With phosphor:
This subclass is indented under subclass 542. Subject matter
which includes a phosphor screen which is, (1) responsive to
electromagnetic radiation to change the frequency of the
electromagnetic radiation to electromagnetic energy to which
the photoemissive electrode is responsive to emit
photoemissive electrons from its surface, or (2) responsive
to the photoemissive electrons emitted by the photoemissive
electrode as a result of the bombardment by the
electromagnetic radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
483 for a lamp or discharge device with a luminescent solid
or liquid material.
525 for a lamp or discharge device of the photosensitive
type having a phosphor screen responsive to a photocathode or
a photocathode responsive to a phosphor screen.
Subclass:
544
With envelope:
This subclass is indented under subclass 543. Subject matter
which includes a container generally to enclose the
photocathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
364 for an image pickup tube with a photoemissive cathode.
532 for a photomultiplier which includes a photoemissive
cathode within an envelope.
538 for a gas or vapor phototube which includes a
photoemissive cathode within an envelope.
541 for a phototube having a photocathode on the tube wall.
Subclass:
545
HAVING VALVE WITH GETTER, GAS/VAPOR GENERATING MATERIAL OR
PRESSURE CONTROL MEANS:
This subclass is indented under the class definition.
Subject matter which includes as electric lamp or a discharge
device having an envelope with an opening, a passageway with
a device to close or open the passageway connected to the
opening to permit the passage of gas or vapor including a
getter into or out of the envelope for the purpose of
controlling the operation including the regulation of the gas
or vapor pressure of the lamp or discharge device.
(1) Note. The subcombination of the valve for an electric
lamp or discharge device is here unless provided for
elsewhere.
(2) Note. The reservoir for the gas or vapor to be admitted
to the lamp or discharge device can be also claimed.
(3) Note. The purpose may be for pressure regulation of the
gas or vapor pressure of the lamp or discharge device or for
gettering an unwanted gas or vapor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
7 for a lamp or discharge device with an evacuating pump.
11 for a lamp, discharge device or electrode combined with
means to modify the temperature of the lamp, discharge device
or electrode or some other part thereof.
SEE OR SEARCH CLASS:
137, Fluid Handling, subclass 251.1 for liquid valves, per
se.
141, Fluent Material Handling, With Receiver or Receiver
Coacting Means, subclass 8 for processes of exhausting a
lamp envelope, and inserting a gas or vapor into the
exhausted envelope.
222, Dispensing, 3 for gas or vapor dispensing into an
evacuated envelope by the use of a valve.
251, Valves and Valve Actuation, for a valve.
315, Electric Lamp and Discharge Devices: Systems, subclass
110 for valve controlled confined gas or vapor load device
with pressure regulating means.
411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or
Locked-Threaded Fastener, 52 for expansion and contraction
of pump fluid processes.
Subclass:
546
WITH FRANGIBLE CAPSULE CONTAINING GETTER, GAS OR VAPOR
GENERATING MATERIAL:
This subclass is indented under the class definition.
Subject matter which includes a sealed capsule holding a
getter or a gas or vapor generating material, capable of
being opened within the envelope so that the material can
enter the inside of the envelope to perform some function.
(1) Note. The container can be unsealed by breaking the
container, melting at least a portion of the container,
penetrating the container, or destroying the sealed container
in any way to cause the material to enter the inside of the
envelope.
(2) Note. Here is the subcombination of an envelope of a
lamp or discharge device and a frangible container with
material within the inside of the envelope.
(3) Note. Material in the container may be solid, gas or
liquid.
SEE OR SEARCH CLASS:
141, Fluent Material Handling, With Receiver or Receiver
Coacting Means, subclass 7 for a gas or vapor in a receiver
with the evacuation of the receiver for processes.
252, Compositions, 181.1 for getter compositions or gas or
vapor generating material compositions which may be stored in
a capsule.
417, Pumps, 48 for electric or getter type pumps where the
claims do not state the gettering action is within a lamp or
discharge device (single disclosure appears to control the
classification).
445, Electric Lamp or Space Discharge Component or Device
Manufacturing, 9 for a process which includes generating gas
or vapor or coating by gas vapor, mist or smoke within an
envelope combined with an assembly operation, subclass 16 for
a process of gas introduction into an electric lamp or
discharge device with generating gas or vapor within the
envelope, subclass 19 for a process which includes the
generating a gas or vapor, mist or smoke within an envelop
which requires induction heating to release the generated
material, subclasses 38+ for a process which includes the
evacuation of a lamp or discharge device and some other
operation, subclasses 53+ for a process which includes
evacuation, degasification or gas, vapor or liquid
introduction into a lamp or discharge device envelope and the
step of gettering within the envelope and subclasses 70 and
73 for apparatus to evacuate, degasify and/or gas, vapor or
liquid introduction into a lamp or discharge envelope.
Subclass:
547
HAVING HEATING MEANS TO CONTROL GAS/VAPOR, GAS OR VAPOR
GENERATING MEANS OR GETTER MEANS:
This subclass is indented under the class definition.
Subject matter which includes an envelope for a lamp or
discharge device, at least an electrode within the envelope
and electric heating means to maintain or control the
temperature or the pressure of gas or vapor within certain
limits within the envelope, to cause the generation of gas or
vapor within the envelope or to control a getter within the
envelope to remove a gas or vapor from the gas to vapor
within the tube.
SEE OR SEARCH THIS CLASS, SUBCLASS:
552 for a gas or vapor lamp of discharge device having
pressure control of the gas or vapor generally.
553 for a lamp or discharge device having a getter.
Subclass:
548
Incandescent lamp gettering:
This subclass is indented under subclass 547. Subject matter
wherein the electric heating means is used for the purpose of
heating getter material within the envelope to remove
unwanted gas or vapor from the gas or vapor within the
envelope of an incandescent lamp.
SEE OR SEARCH THIS CLASS, SUBCLASS:
315 for an incandescent lampgenerally.
557 for an incandescent lamp and getter including getter
material where no additional heating means to heat the getter
is claimed.
578 for a gas or vapor incandescent lamp.
Subclass:
549
Discharge device gettering:
This subclass is indented under subclass 547. Subject matter
wherein the electric heating means is used for the purpose of
heating the getter material within the envelope to remove
unwanted gas or vapor from the gas or vapor within the
envelope of an electrical discharge device.
(1) Note. Here the getter or the getter support may be part
of the heating means.
(2) Note. Included are electrical resistance, induction or
any other type of electric heaters for the purpose of heating
the getter in the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
553 for a discharge device of the gas, vapor or the vacuum
type with a getter whether it is a lamp or electronic tube
where no additional heating means is claimed.
Subclass:
550
Vapor generating:
This subclass is indented under subclass 547. Subject matter
wherein the electric heating means is used to create a vapor
from material within the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
564 for a lamp or discharge device having vapor generating
material where no additional heating means is claimed.
Subclass:
551
Gas generating:
This subclass is indented under subclass 547. Subject matter
wherein the electric heating means is used to create a gas
from material within the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
563 for a lamp or discharge device having gas generating
material where no additional heating means is claimed.
Subclass:
552
HAVING PRESSURE CONTROL OF GAS OR VAPOR:
This subclass is indented under the class definition.
Subject matter which includes a gas or vapor within the
envelope, at least an electrode within the envelope and
material of structure to release or take up gas vapor within
the envelope to control the pressure of the gas or vapor
within the envelope.
(1) Note. Here gas or vapor may be added or subtracted from
the gas or vapor within the envelope to control the pressure
or the temperature of the gas or vapor within the envelope
more than one time.
(2) Note. The lamp or discharge device itself in its normal
operation creates the energy which controls the material or
structure to release or remove gas or vapor from the amount
of gas or vapor within the lamp or discharge device.
(3) Note. Pressure control requires the ability to add or
subtract gas or vapor from the gas or vapor within the
envelope. The temperature of the gas or vapor determines
whether gas or vapor is added to subtracted.
(4) Note. The vacuum of a vacuum tube is considered to be
pressure on the gas or vapor within the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 for a lamp or discharge device with a temperature
modifier.
547 for pressure control of gas or vapor using heating means
rather than the heat evolved during the operation of the
tube.
Subclass:
553
WITH GETTER:
This subclass is indented under the class definition.
Subject matter including a lamp or discharge device having a
gas or vapor within an envelope detrimental to the operation
of the lamp or discharge device and a material to remove the
detrimental gas or vapor or lessen the amount of the
detrimental gas or vapor in the atmosphere of the envelope.
(1) Note. The subcombination of an envelope and a getter
within the envelope will be placed in this group of
subclasses.
(2) Note. The getter receives heat from the filament of a
lamp, a cathode heater of a tube, or the electrical discharge
of a tube.
(3) Note. Getters may be of the absorption, adsorption,
chemical reaction type or by any means solely within the
envelope.
(4) Note. Support structure for a getter or with a getter
where the only disclosure is for an electric lamp or
discharge device will be placed with the appropriate subclass
as a subcombination not elsewhere classified.
(5) Note. Getter materials for vacuum tubes are classified
in this subclass.
Subclass:
554
Plural:
This subclass is indented under subclass 553. Subject matter
wherein there are at least two getter materials or structures
within the envelope of the lamp or discharge device.
Subclass:
555
Diverse:
This subclass is indented under subclass 554. Subject matter
wherein the plural getters include at least two different
elements, or compounds, or an element and a compound within
the envelope of the electric lamp or discharge device.
(1) Note. A getter may change an element or a compound
within the sealed envelope into other substances and a second
getter may in turn change the resulting products of the first
gettering action into other chemical substances.
(2) Note. Here the plural diverse getters may be in name
only and may affect the same unwanted element or compound
within the envelope.
Subclass:
556
And vapor generator:
This subclass is indented under subclass 553. Subject matter
which includes, in addition to the getter, a material to
produce a vapor within the envelope.
Subclass:
557
Incandescent lamp type:
This subclass is indented under subclass 553. Subject matter
wherein there is an incandescent filament within the
envelope.
Subclass:
558
Electrode includes getter, supports getter or is connected to
getter:
This subclass is indented under subclass 553. Subject matter
including an electrode which, (1) includes getter material,
(2) supports a getter, or (3) is connected to a getter.
SEE OR SEARCH THIS CLASS, SUBCLASS:
559 for a getter mounted on an electrode support.
Subclass:
559
Mounted on electrode support:
This subclass is indented under subclass 553. Subject matter
wherein the getter or getter material is mounted on a support
for an electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
558 for a getter, forming part of an electrode, supported by
an electrode or connected to an electrode.
Subclass:
560
With structure to direct or shield from getter:
This subclass is indented under subclass 553. Subject matter
which includes structure to direct or cause the gas or vapor
of the supported getter to be deposited only in certain areas
within the envelope.
(1) Note. The subcombination of a discharge envelope with a
support for a getter with a directional type outlet is
classified here.
(2) Note. Classified here are getters within a discharge
device envelope having an electrode with a shield to prevent
the getter material from being deposited in unwanted areas of
the tube or with a container with an outlet to have the
getter material leave the container in a predetermined
direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
481 for a cathode-ray tube with a getter.
558 for a getter, part of an electrode, supported by an
electrode or connected to an electrode.
565 for a contained getter without means to direct the gas
or vapor of the getter.
Subclass:
561
With contained getter:
This subclass is indented under subclass 553. Subject matter
which includes a getter material supported by a holder.
Subclass:
562
Gas or vapor device type:
This subclass is indented under subclass 553. Subject matter
wherein the getter is used in a gas or vapor type tube.
SEE OR SEARCH THIS CLASS, SUBCLASS:
553 for a vacuum tube getter.
Subclass:
563
HAVING GAS GENERATING MATERIAL:
This subclass is indented under the class definition.
Subject matter which includes an envelope for a lamp or
discharge device, at least an electrode or a filament and a
material within the envelope capable of emitting a gas.
(1) Note. The subcombination of an envelope of a lamp or
discharge device and a gas within the envelope and a material
which will generate a gas is here in the absence of another
class to take this subcombination. Also an electrode, per se,
with gas generating material is here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
551 for gas generating means within the envelope having
heating means other than the heat developed in the operation
of the lamp or discharge device.
SEE OR SEARCH CLASS:
206, Special Receptacle or Package, 0.6 for a receptacle
with a gas therein.
315, Electric Lamp and Discharge Devices: Systems, subclass
108 for gas or vapor type load device with pressure
regulating means and subclasses 111.01+ for a discharge
device load with fluent material supply to discharge space.
361, Electricity: Electrical Systems and Devices, subclass
120 for gas filled space discharge device in safety and
protection of systems and devices to dissipate high voltage
arcs.
Subclass:
564
HAVING VAPOR GENERATING MATERIAL:
This subclass is indented under the class definition.
Subject matter which includes an envelope for an electric
lamp or discharge device, at least an electrode and a
substance capable of being vaporized within the envelope.
(1) Note. A vapor is the gasified state of a liquid or a
solid material.
(2) Note. No electrical heating means is claimed to change
the substance from a solid or a liquid to a vapor. See
subclass 550 for heating means to heat vapor generating
material. In this subclass the heat evolved in the operation
of the tube changes the vaporizable substance to a vapor.
(3) Note. The subcombination of an envelope of a lamp or
discharge device and a material capable of being vaporized is
here in the absence of a class to take the subcombination.
SEE OR SEARCH THIS CLASS, SUBCLASS:
550 for a lamp or discharge device having electrical heating
means to vaporize material.
554 for temperature or pressure control of a gas or vapor.
555 for a lamp or discharge device having a getter which is
a vapor generating material.
571 for a lamp or discharge device envelope with a gas or
vapor fill.
SEE OR SEARCH CLASS:
361, Electricity: Electrical Systems and Devices, 2
particularly 14 for arc blowout for main breaker contact by
means of a fluid or gas and subclass 121 for high voltage
dissipation by means of a fluid.
Subclass:
565
Mercury vapor material:
This subclass is indented under subclass 564. Subject matter
wherein the substance to be vaporized is mercury.
Subclass:
566
Electrode or electrode support includes material:
This subclass is indented under subclass 564. Subject matter
wherein the electrode composition or structure or the support
for the electrode includes the substance capable of being
vaporized.
Subclass:
567
WITH GAS OR VAPOR:
This subclass is indented under the class definition.
Subject matter which includes a lamp or discharge device
having a gas or vapor within an envelope.
Subclass:
568
Having a particular total or partial pressure:
This subclass is indented under subclass 567. Subject matter
wherein the gas or vapor pressure within the envelope is
stated as being a specific pressure or in a range of
pressures.
(1) Note. The unit of pressure, torr, is the same as a
millimeter of pressure.
(2) Note. The patents are placed on the basis of the
highest pressure of the total or the partial pressure recited
in the claim.
(3) Note. Here are patents which include a gas or vapor
fill of less than one torr, but greater than .1 torr.
SEE OR SEARCH THIS CLASS, SUBCLASS:
233 for a lamp or discharge device which is defined in terms
of the degree of vacuum within the envelope of the lamp or
discharge device. However, claims reciting a gas or vapor at
less than 0.1 torr are classified in subclass 577.
549 for a lamp or discharge device having a heating means to
control the gas or vapor pressure within the envelope of the
lamp or discharge device.
552 for a lamp or discharge device having means to control
the gas or vapor pressure within the envelope of the lamp or
discharge device, using the heat developed in the operation
of the lamp or discharge device.
637 for a lamp or discharge device having a particular gas
or vapor including mixtures of gases or vapors.
Subclass:
569
Incandescent lamp:
This subclass is indented under subclass 568. Subject matter
which includes a filament type lamp.
SEE OR SEARCH THIS CLASS, SUBCLASS:
315 for incandescent glower or filament type lamps with or
without an enclosing envelope.
548 for incandescent lamp gettering by heating means.
557 for incandescent lamp with getter including gettering
and gettering material.
578 for a gas or vapor type incandescent lamp.
Subclass:
570
Greater than 760 torr:
This subclass is indented under subclass 568. Subject matter
wherein the gas or vapor pressure is in excess of one
atomsphere.
(1) Note. One torr is equal to one millimeter of pressure.
Subclass:
571
Includes mercury in gas or vapor fill:
This subclass is indented under subclass 570. Subject matter
which includes mercury in the gas or vapor.
Subclass:
572
One torr thru 760 torr:
This subclass is indented under subclass 568. Subject matter
wherein the gas or vapor pressure within the envelope is from
one torr to and including 760 torr.
Subclass:
573
Having specified envelope detail:
This subclass is indented under subclass 572. Subject matter
wherein the envelope is defined in terms of some envelope
feature.
(1) Note. The feature may be structural, or composition, or
some optical feature, but not merely transparent,
translucent, sealed or vitreous.
(2) Note. Included in this subclass are patents to both
envelope detail and electrode detail.
SEE OR SEARCH THIS CLASS, SUBCLASS:
317 for a lamp or discharge device having a particular
envelope.
634 for a gas or vapor discharge device envelope having
particular structure including envelopes with a layer or
coating or material.
636 for a gas or vapor discharge device having a particular
envelope composition.
Subclass:
574
With electrode structure:
This subclass is indented under subclass 572. Subject matter
which includes a structural detail of an electrode.
(1) Note. For electrode material or composition, see
subclasses 568+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for a lamp or discharge device with a support and/or
spacing structure for electrode and/or shield.
326 for lamp or discharge device electrode or shield
structures, per se.
615 for a gas or vapor discharge device having a crater
electrode and a shield.
617 for a gas vapor discharge device having a spur
electrode.
618 for a gas or vapor discharge device having a hollow
cathode.
622 for a gas or vapor discharge device having diverse
electrodes.
630 for a gas or discharge device having an electrode of
alkali, alkaline, or rare earth material.
631 for a gas or vapor discharge device having particular
electrode structure.
633 for a gas or vapor discharge device having cathode or
anode of composition.
Subclass:
575
Composite:
This subclass is indented under subclass 574. Subject matter
including an electrode made of more than one part or
material.
(1) Note. Here are electrodes having a base material with a
coated, or layered type electrode.
(2) Note. The composite electrode is generally a cathode
having a low work function material to increase electron
emission.
SEE OR SEARCH THIS CLASS, SUBCLASS:
352 for composite electrodes.
Subclass:
576
With rare gas:
This subclass is indented under subclass 575. Subject matter
which also includes noble gas.
(1) Note. The rare gases are helium, neon, argon, krypton
or xenon. These gases are also know as the noble or inert
gases.
SEE OR SEARCH THIS CLASS, SUBCLASS:
641 for a lamp or discharge device having a mercury vapor,
rare earth metal and a rare gas atomsphere.
642 for a lamp or discharge device including a mercury vapor
and a rare gas atmosphere.
643 for a lamp or discharge device including one or more
rare gases.
Subclass:
577
Less than .1 torr:
This subclass is indented under subclass 568. Subject matter
wherein the total or partical pressure of the gas or vapor is
below one-tenth torr.
SEE OR SEARCH THIS CLASS, SUBCLASS:
233 for lamp or discharge devices which are defined in terms
of the magnitude of the vacuum of the lamp or discharge
device.
Subclass:
578
Incandescent filament lamp:
This subclass is indented under subclass 567. Subject matter
which includes an electrical filament capable of being
energized within the envelope so that the filament as a
result of the energization is heated to emit electromagnetic
radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37 for a lamp or discharge device with a temperature
modifier for a filament or heated cathode.
110 for an incandescent lamp having an optical device or a a
special ray transmissive envelope intergal therewith.
315 for incandescent lamp having a glower or filament
adapted to be heated to incandescence by passage of current
therethrough.
317 for significant envelope or envelope and base structure
and a filament or light emitter body in name only or broadly
and no relationship to other parts of the lamp.
341 for a lamp only with significant filament or glower
structure.
557 for a getter integral with an incandescent lamp.
563 for a lamp having a gas generating material.
564 for a lamp having vapor generating material.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems,
particularly subclass 46 for a combined load device or load
device temperature modifying means wherein there is a
filament, electric heater, or resistance in shunt with the
discharge electrodes of a discharge device load, subclass 49
for a filament or electric in series with a discharge device
load and subclasses 82+ for headlight systems.
Subclass:
579
Tungsten-halogen cycle lamp:
This subclass is indented under subclass 578. Subject matter
wherein the filament is tungsten and the gas includes, (1) a
hologen, or (2) a halogen compound containing gas, or (3) a
halogen compound within the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
548 for a lamp or discharge device having heating means to
control an incandescent lamp getter.
557 for an incandescent lamp having a getter.
Subclass:
580
With filter, barrier, screen, shield, electric terminal or
fuse:
This subclass is indented under subclass 578. Subject matter
which includes, (1) a physical screen to trap unwanted
material as vaporized filament material, (2) a screen or
shield for preventing an explosion, or fire within the lamp,
(3) a quick make and break electrical connector attached to
the filament, (4) a barrier to contain or impede the
circulation of gas or vapor within the envelope, or (5) an
integral fuse in circuit with the filament.
SEE OR SEARCH THIS CLASS, SUBCLASS:
579 for tungsten filament-halogen cycle lamps that lessens
blackening of the lamp envelope.
SEE OR SEARCH CLASS:
96, Gas Separation: Apparatus, for apparatus for gas
separation, per se.
315, Electric Lamp and Discharge Devices: Systems, 119 for
an electric lamp with an automatic shunt or cut-off.
337, Electricity: Electrothermally or Thermally Actuated
Switches, 142 for fusible element actuated switch.
439, Electrical Connectors, 611 for a quick make or break
electrical connector with a vitreous envelope secured to
contact or coupling part.
Subclass:
581
Three or more electrode discharge device:
This subclass is indented under subclass 567. Subject matter
wherein the discharge device includes at least three
electrodes within the envelope.
(1) Note. See the glossary for the definition of the term
"electrode".
SEE OR SEARCH THIS CLASS, SUBCLASS:
162 for a discharge device or lamp having a movable
electrode or shield in an envelope having three or more
electrodes.
163 for a liquid electrode discharge device having three or
more electrodes, particularly subclass 168 for plural anodes
in separate envelope chambers.
306 for a discharge device having three or more electrodes.
568 for a lamp or discharge device having a particular total
or partial gas or vapor pressure.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 334 and
the subclasses specified in the notes for systems for
supplying electrical energy to gas or vapor discharge devices
which have a plurality of cathodes and/or anodes and
subclasses 349+ and the subclasses cited in the notes thereto
for systems supplying electrical energy to gas or vapor type
discharge devices which have a control electrode.
Subclass:
582
Multiple gaseous discharge display panel:
This subclass is indented under subclass 581. Subject matter
wherein the envelope has an extended viewing surface, a first
set and a second set of electrode, of the second set produce
a point of light in the ionized gas to form a visual
display.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
169.4 for a gas display panel device having diverse type
energizing or bias supplies to different electrodes of a
plural anode and/or cathode load device.
345, Computer Graphics Processing, Operator Interface
Processing, and Selective Visual Display Systems, 41 for
selective electrically controlled visual display systems
having segmented, fluid, light-emitting display elements, and
subclasses 60+ for selective electrically controlled visual
display systems having fluid light-emitting display elements
arranged in a matrix or array.
Subclass:
583
Having electric terminal detail:
This subclass is indented under subclass 582. Subject matter
where there is included electrical terminal structure
connected to the electrodes to supply power to ionize the
gas.
(1) Note. Since the bulk of the patents here do not claim
the gas as ionizable and some do not include in the claim
more than two electrodes, the patents are placed here on the
basis of the disclosure having an envelope with a gas therein
and at least one electrode associated with the gas.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 17 for boxes
and housings with fluids or vacuum particularly subclass 18
with bushing, terminal or lead in and subclasses 50.5+ for
hermetic sealed envelope type boxes and housings.
439, Electrical Connectors, 55 for an electrical connector
with a preformed panel circuit arrangement without specific
electronic structure; and subclasses 611+ for an electrical
connector or contact having a vitreous-type envelope secured
thereto.
Subclass:
584
Having intersecting electrode sets:
This subclass is indented under subclass 582. Subject matter
wherein the electrodes of the first set are at an angle to
the electrodes of the second set so that an electrode of one
set can intersect each of the electrodes of the other set to
create a plurality of points of light when the sets of
electrodes and the gas are appropriately energized.
Subclass:
585
With three sets of electrodes:
This subclass is indented under subclass 584. Subject matter
which includes a third set of electrodes spaced from the
second set of electrodes.
Subclass:
586
With dielectric member:
This subclass is indented under subclass 584. Subject matter
wherein there is a dielectric medium between the ionizable
gas and at least one set of the electrodes.
(1) Note. One of the sets may have one electrode, but the
second set has plural electrodes.
(2) Note. The dielectric medium may be claimed as a
composition with or without the thickness of the medium or in
terms of the thickness of the medium.
(3) Note. The type of display panel here is energized by an
alternating current supply supply rather than direct
current.
Subclass:
587
And additional layer on member:
This subclass is indented under subclass 586. Subject matter
wherein the dielectric medium has another layer of material.
(1) Note. The layers may be a coating or a laminate and one
of the layers may be electron emissive.
Subclass:
588
Amplifier, cathanode or ionic cathode:
This subclass is indented under subclass 581. Subject matter
which includes, (1) a cathode and an anode between which the
main electron flow takes place after the gas or vapor ionizes
and a control electrode which does not lose control of the
electron flow between the cathode and the anode after the gas
or vapor ionizes, (2) an auxiliary cathode and an anode with
the gas or vapor in between which functions, when the
appropriate voltage is placed on the auxiliary cathode and
the anode, to ionize the gas or the vapor to create electrons
which form the electron current in the envelope, or (3) an
auxillary cathode and an auxillary anode which causes the gas
or vapor to ionize, when the appropriate voltage is placed
between them and cause the electrons formed by the ionization
to bombard the auxillary anode which in turn gives off
secondary electrons which acts as the main cathode of the
device.
(1) Note. See the glossary for the terms "cathanode" and
"ionic cathanode".
(2) Note. Some the discharge device in this subclass are
provided with means, such as a barrier, between two discharge
spaces, so that different pressures of gas or different kinds
of gas may be maintained in the respective discharge space,
the barrier being electron permeable. Other of the discharge
spaces have the electron receiving electrode so spaced with
respect to the ionizing discharge electrodes that the
electrons do not attain sufficient velocity or do not travel
through sufficiently long distance to ionize the gas or
vapor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
305 for cathanode type discharge device which is provided
with two electron emissive electrodes and another electrode,
one electron emissive electrode being designed to emit
electrons to the second electron emitting electrode to heat
the second emitting electrode to its emitting temperature,
the second emitting electrode being designed to emit
electrons to the third electrode.
359.1 for discharge devices with means to form and
accelerate positive ion or megative ions.
420 for a cathode-ray tube which is provided with a electron
permeable window.
598 for a gas or vapor discharge device with three or more
electrodes one of which is an apertured grid, the space
between two of the electrodes is less than the mean free path
spacing of the gas or vapor.
SEE OR SEARCH CLASS:
330, Amplifiers, 4 for maser type amplifying devices and
subclass 41 for gas or vapor type amplifying device.
331, Oscillators, subclass 126 for a gaseous space discharge
device.
372, Coherent Light Generators, particularly 55 for gas or
vapor media generators.
Subclass:
589
Counter, indicator or switching tube:
This subclass is indented under subclass 581. Subject matter
wherein there is a plurality of the same type of anode or
cathode and an electrode of the opposite type, conduction of
the gas or vapor when ionzed between the electrode of the
opposite type and one of the plurality of the same type
electrodes can be shifted to another electrode of the
plurality of the same type electrodes and the same electrode
of the opposite type whereby the tube can function as
counter, indicator or a switching tube.
(1) Note. The envelope may or may not be transmissive to
the light caused by the ionization of the gas or vapor in the
operation of the tube.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
84.61 for pulse storing systems of the gaseous discharge
tube type having plural cathode or anodes and subclass 169.2
for a plural power supply to a plural cathode and/or anode
load device having diverse type energizing or bias supplies
to different electrodes including shifting, of register,
counter or display.
377, Electrical Pulse Counters, Pulse Dividers, or Shift
Registers: Circuits and Systems, subclass 103 for counting
or dividing chains using gas filled tubes.
Subclass:
590
With shield to prevent discharge between electrodes:
This subclass is indented under subclass 581. Subject matter
which includes a physical barrier within the envelope to
prevent the passage of an electrical discharge from one
electrode to another electrode.
(1) Note. Classified here are barriers to prevent a
discharge between two anodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
609 for baffles, partition or constricting means to control
the discharge path within the discharge device.
613 for electron shields to prevent a discharge to the
electrode.
Subclass:
591
Having cathode heater:
This subclass is indented under subclass 581. Subject matter
wherein there is a cathode which is electrically heated by
the passage of an electrical current through an electrical
resistance element which may be the cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
337 for indirectly heated cathodes, per se.
341 for filament or resistance heated electrodes, per se.
629 for gas or vapor tubes having a resistance heated
cathode.
Subclass:
592
With control electrode:
This subclass is indented under subclass 591. Subject matter
wherein there is a control grid electrode whose function is
to ionize the gas or vapor within the envelope.
(1) Note. Here the grid electrode loses control of the
ionized gas when the gas or vapor becomes ionized.
SEE OR SEARCH THIS CLASS, SUBCLASS:
163 for liquid electrode device particularly subclasses 170+
for an auxiliary starting or holding electrode.
588 for a gas or vapor discharge device wherein the grid
does not lose control of the discharge.
Subclass:
593
Plural:
This subclass is indented under subclass 592. Subject matter
wherein there are two or more control electrodes within the
envelope.
(1) Note. If a thyratron is claimed, the cathode may be
stated as a "cathode" rather than a thermionic or an
electrically heated cathode.
(2) Note. Classified here are shield grid thyratrons.
Subclass:
594
Start electrode exterior to envelope:
This subclass is indented under subclass 581. Subject matter
wherein there is a starting electrode on the outside of the
envelope, the start electrode when electrically energized
along with the electrodes within the envelope of the gas or
vapor tube, causes the gas or vapor to ionize to form the
discharge current in the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
166 for a liquid electrode discharge device having a
starting band or external electrode.
595 for gas or vapor three electrode discharge device with
an internal start or control electrode in the discharge
path.
601 for three electrode gas or vapor discharge device where
a start electrode is not in main discharge path.
607 for a gas or vapor discharge device having an electrode
on the outside of the envelope.
Subclass:
595
Internal start or control electrode between discharge
electrodes:
This subclass is indented under subclass 581. Subject matter
wherein the start or control electrode is between two spaced
electrodes which are capable of having an electrical
discharge there between in use, the start or control
electrode being capable of starting or controlling the
discharge of the ionized gas or vapor between the two spaced
electrodes.
Subclass:
596
Strip electrode:
This subclass is indented under subclass 595. Subject matter
wherein the electrode between the two spaced electrodes is an
elongated electrical conductor.
(1) Note. The strip electrode may be electrically connected
to either of the two spaced electrodes.
(2) Note. The discharge devices here are generally
double-ended tubes but the subclass is not restricted to such
type tubes.
(3) Note. The two spaced electrodes are heated filaments,
but the subclass is not restricted to electrically heated
resistance electrodes.
Subclass:
597
Interposed apertured electrode:
This subclass is indented under subclass 595. Subject matter
wherein the start or control electrode has at least one
opening there through or formed to make a conduit to permit
the passage of the electrical discharge, between the two
electrodes.
(1) Note. The control or start electrode can be grid like
or in the form of an open cylinder.
Subclass:
598
Mean free-path spacing:
This subclass is indented under subclass 597. Subject matter
wherein the interposed apertured electrode is spaced from
another electrode a distance which is less than the mean free
path distance of an electron in the gas or vapor within the
device.
(1) Note. The mean free path of an electron is the average
distance an electron may travel in the gas or vapor without
producing ionization of the gas or vapor. As the mean free
path distance depends upon a number of factors, not all of
which necessarily involve structure of the discharge device,
this subclass includes patents which claim two electrodes as
being within the mean free path distance and include as cross
references patents which disclose that the electrodes are
within the mean free path distance.
(2) Note. The electrodes between which the apertured
electrode is interposed may be spaced from each other a
distance less than the mean free path length.
Subclass:
599
Plural serial apertured electrodes:
This subclass is indented under subclass 597. Subject matter
wherein there are more than one apertured electrode in series
in the electrical discharge path of the discharge device.
Subclass:
600
Two interposed electrodes:
This subclass is indented under subclass 595. Subject matter
wherein there are at least two electrodes between the two
spaced electrodes.
(1) Note. Included are auxiliary electrodes which ionize
the gas or vapor of the discharge device but are not in the
main discharge path.
Subclass:
601
Start electrode not in main discharge path:
This subclass is indented under subclass 581. Subject matter
wherein one of the electrodes is a starting, trigger or
control electrode and two of the electrodes are the discharge
electrodes of the discharge device, the one electrode is
placed out of the discharge path between the main discharge
electrodes of the discharge device.
Subclass:
602
Trigger electrode concentric with discharge electrode:
This subclass is indented under subclass 601. Subject matter
wherein the start or the control electrode is placed with
respect to one of the two discharge electrodes so that they
both have a common axis.
Subclass:
603
Triggerable vacuum gap device:
This subclass is indented under subclass 601. Subject matter
wherein there is a starting electrode which injects an
ionized gas or vapor into the discharge device as a result of
an overload so that an electrical discharge can be
transferred to the discharge electrodes of the discharge
device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
231.01 for a fluent material supply or flow directing means
in a discharge device lamp, radiation source or discharge
device.
Subclass:
604
Plural serial electrodes:
This subclass is indented under subclass 581. Subject matter
wherein two of the electrodes are the main discharge
electrodes and there is at least another electrode in between
wherein all electrodes are in series with each other so that,
when an ionized discharge takes place between successive
electrodes, the voltage drop between two successive
electrodes is proportional to the distance between the two
electrodes with respect to the overall distance between the
main discharge electrodes.
(1) Note. The tubes here can be voltage regulators, voltage
dividers or overvoltage protection devices for a circuit or
for the tube itself.
Subclass:
605
Mean free-path spacing of envelope portions or content
parts:
This subclass is indented under subclass 567. Subject matter
wherein one envelope portion or a part of the device is
spaced from another envelope portion or part of the device a
distance which is less than the mean free-path length
distance.
(1) Note. The mean free-path distance of an electron is the
average distance an electron may travel in the gas or vapor
without producing ionization of the gas or vapor. As the
mean free-path length depends upon a number of factors, not
all of which involve structure of the device, this and the
indented subclass include patents which claim the parts as
being within the mean free-path distance and include as cross
references patents that disclose that the parts are within
the mean free-path distance.
Subclass:
606
Electrode spacing related to mean free path length:
This subclass is indented under subclass 605. Subject matter
wherein at least a portion of the electrode is spaced a
distance from a portion of another electrode less than the
mean free path spacing.
(1) Note. The spacing may be for the purpose of restricting
current flow from one electrode or may be for the purpose of
insulating one portion of an electrode from a portion of
another electrode even though other portions of the
electrodes are spaced a distance which permits ionization
between such portions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
598 for a gas or vapor discharge device having a grid like
or apertured electrode interposed in the discharge path
between two discharge electrodes, the distance between the
discharge electrodes being less than the means free path
length.
620 for a gas or vapor discharge device having the spacing
between electrodes cited as being a specific distance or a
range of distances or being based upon the gas or vapor
pressure or the operating electrical power.
621 for a gas or vapor discharge device having the
electrodes spaced from each other in terms of a geometrical
relationship.
Subclass:
607
Having electrode exterior to envelope:
This subclass is indented under subclass 567. Subject matter
wherein at least one electrode of the discharge device is on
the outside of the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
594 for a gas or vapor discharge device having at least
three electrodes one of which is on the outside of the
envelope.
Subclass:
608
Single electrode type discharge device, or including
particulate material:
This subclass is indented under subclass 567. Subject matter
which include discharge devices having only one electrode; or
which have a space between two electrodes which is at least
partially filled with particulate material.
(1) Note. When the discharge device has but one electrode
and the voltage to operate the device is applied between the
single electrode and some other object, such as ground, the
electrostatic field at the discharge device along with the
gas pressure and the device structure is capable of causing
ionization of the gas or vapor within the device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
325 for a discharge device having an insulating material in
the discharge space.
SEE OR SEARCH CLASS:
607, Surgery: Light, Thermal, and Electrical Application,
154 for discharge devices which are designed to transmit
high frequency electric current into the human body, the
devices include an envelope with a confined gas or vapor and
an electrode within the envelope, the human body being used
as the other electrode to establish a space discharge in the
device.
Subclass:
609
Having baffle, partition, or constricting means affecting
discharge:
This subclass is indented under subclass 567. Subject matter
which includes physical structure within the envelope to
change the direction of the electrical discharge within the
envelope or which can be part of the envelope to change the
area of the discharge flowing within the envelope.
(1) Note. Shields for an electrode which may act as a
baffle are classified in subclasses 613+.
(2) Note. Electrical type of control of the discharge is
not classified here.
(3) Note. In these indented subclasses, there is no
structure to stop the electrical discharge from continuing.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 for a lamp or discharge device having an envelope with
internal temperature modifying baffle.
317 for a lamp or discharge device having a particular
envelope structure.
325 for a miscellaneous discharge device which has an
insulating material in the discharge space.
608 for a gas or vapor discharge device including
particulate material between discharge electrode.
613 for an electrode with a baffle to prevent an electrical
discharge from hitting the electrode except in a specific
direction.
634 for a gas or vapor discharge device having an envelope
with a nonlinear discharge path.
Subclass:
610
Partition:
This subclass is indented under subclass 609. Subject matter
wherein the physical means within the envelope not only
guides the direction of the discharge but also changes the
cross-sectional area of the discharge that can flow through
the envelope and lengthens the discharge path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
611 for a partition that only changes the area of the
discharge between electrodes.
Subclass:
611
Constriction means:
Subject matter under subclasses 609+ wherein the structure
includes, (1) envelope structure which changes the
cross-sectional area of the envelope, or (2) physical means
within the envelope to reduce the cross-sectional area of the
discharge of the discharge device.
(1) Note. A constriction reduces the area of the electrical
discharge at least in one position of the discharge path
within the tube and does not change the length of the
discharge path.
Subclass:
612
Substantially the full length of discharge path:
This subclass is indented under subclass 611. Subject matter
wherein the physical means to reduce the cross-sectional area
of the discharge extends substantially the entire length of
the discharge between main electrodes of the tube.
Subclass:
613
Having electrode shield:
This subclass is indented under subclass 567. Subject matter
which includes a protective member, (1) to protect the
electrode from the ionized gas or vapor within the envelope,
or (2) to restrict the area of the electrode available to
receive the ionized discharge of gas or vapor.
(1) Note. See the to this class for the word "shield".
(2) Note. The shield may be an conductor or an insulator.
(3) Note. Here is an electrode surrounded by a conductive
or an insulative shield which limits the area of the
electrode to receive the ionized gas or vapor discharge in
the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
147 for a lamp or discharge device having a movable shield.
239 for devices having a support and/or spacing structure
for electrode and/or shield.
326 for shield structures, defined by structure, for a lamp
or discharge device.
492 for a lamp or discharge device with luminescent solid or
liquid material and gaseous discharge medium having the solid
or liquid on the envelope and an electrode shield.
590 for a three or more electrode gas or vapor discharge
device with a shield to prevent discharge between
electrodes.
592 for a three or more electrode gas or vapor discharge
device with a shield grid electrode.
626 for a gas or vapor discharge device having electrode
leading shields.
Subclass:
614
With anode shield:
This subclass is indented under subclass 613. Subject matter
wherein the electrode is an anode or the electrode acts as an
anode during the portion of an alternating voltage supplying
power to the electrode and the member prevents bombardment of
the anode or electrode by positive ions or restricts the area
of the anode or electrode available to the discharge of the
device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
168 for liquid electrode discharge device which has a
plurality of anodes and an envelope having a plurality of
separate anode chambers.
169 for a liquid electrode discharge device which is
provided with a plurality of anodes, at least one anode
having a shield.
590 for three or more electrode gas or vapor discharge
device including a plurality of anodes, at least one anode
having a shield.
609 for a gas or vapor discharge device having physical
barrier or partition between the electrodes of a discharge
path to cause the discharge to travel along a longer path
between the electrodes or a constricting means in the
discharge path which reduces the cross-sectional area of the
discharge path to a smaller area than the rest of the path.
616 for a gas or vapor discharge device with a positive ion
or cathode shield.
Subclass:
615
Crater electrode with shield:
This subclass is indented under subclass 613. Subject matter
wherein the electrode is a cathode with a hollowed out
cavity, and there is also an anode and a dielectric shield
touching both the cathode and the anode to prevent an
electrical discharge between the cathode and the anode except
at predetermined locations.
SEE OR SEARCH THIS CLASS, SUBCLASS:
618 for a gas or vapor discharge device having a crater
electrode.
Subclass:
616
With positive ion or cathode shield:
This subclass is indented under subclass 613. Subject matter
wherein the gas or vapor within the envelope becomes ionized
in the operation of the device and the electrode is a cathode
separated from an anode by the ionized gas or vapor and there
is a barrier protecting the cathode so that the positive ions
will hit the barrier to protect the cathode.
(1) Note. The shield is generally connected electrically to
dissipate the electrical charge as a result of the ions
hitting shield.
(2) Note. Shields or anode plates about a thermic cathode
achieve a reduction of the anode voltage drop and slows down
the darkening of a lamp or electronic tube without damage to
the cathode.
(3) Note. An electrical cathode shield is an auxiliary
electrode electrically acting as an anode in alternate half
cycles of a.c. operation of a discharge device.
(4) Note. The positive ion shield need not for the purpose
of shielding the cathode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
614 for a gas or vapor discharge device having an anode
shield.
Subclass:
617
Having spur electrode:
This subclass is indented under subclass 567. Subject matter
wherein the electrode is provided with a starting spur
extending from the electrode towards another electrode.
(1) Note. A starting spur is usually a wire or strip of
metal which is attached to an electrode and extends close to
another electrode, the starting spur serving to initiate the
discharge between it and the other electrode when the device
is put into operation, the discharge transferred to the other
electrode after the initial discharge has been initiated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
592 for a gas or vapor discharge device having a cathode
heater and a starting electrode.
594 for a gas or vapor discharge device having a start
electrode exterior to envelope.
595 for a gas or vapor discharge device with a start
electrode between discharge electrodes.
601 for a gas or vapor discharge device with a start
electrode not in the main discharge path.
Subclass:
618
Having hollow cathode:
This subclass is indented under subclass 567. Subject matter
wherein the electrode is a cathode which has at least a
portion which is a cavity or is a hollow cylinder.
(1) Note. Crater type glow discharge lamp sources are
here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
615 for a gas or vapor device with a shield between the
hollow cathode and the anode.
631 for a gas or vapor discharge device having a hollow or
tubular electrode.
Subclass:
619
Negative or cathode glow device:
This subclass is indented under subclass 567. Subject matter
wherein there are two electrodes and the electrodes and the
electrode spacing are so designed that during the operation
of the device only the negative or cathode glow portion of
the discharge will generate visible light.
SEE OR SEARCH THIS CLASS, SUBCLASS:
615 for a gas or vapor discharge device having a shield
between the anode and crater type cathode to control the type
and the shape of electrical discharge.
618 for a gas or vapor discharge device having a hollow or
crater like cathode to confine the luminous electrical
discharge to the interior or hollow of the cathode.
Subclass:
620
Having specified electrode spacing:
This subclass is indented under subclass 567. Subject matter
wherein there are two electrodes spaced from each other in
terms of, (1) the distance between the electrodes or a range
of distances between them, or (2) the distance between them
stated relative to a parameter of the discharge device or an
operating parameter of the device.
(1) Note. The parameter may be an electrical parameter with
respect to the spacing of the electrodes or a nonelectrical
parameter of the discharge device with respect to the spacing
of the electrodes.
(2) Note. Included in the parameter are the, (1) gas or
vapor pressure of the discharge device with respect to the
spacing between electrodes or the product of the gas or vapor
pressure and the spacing between the electrodes, and (2) the
electrical power to operate the discharge device with respect
to the electrode spacing or the voltage necessary to operate
the discharge device with respect to the electrode spacing.
SEE OR SEARCH THIS CLASS, SUBCLASS:
581 for a three or more electrode gas or vapor discharge
device, particularly subclass 602 for an interposed grid like
or apertured electrode in the discharge space between two
other electrodes, the spacing between the interposed
electrode and another of the electrodes being less than the
mean free path distance.
605 for a gas or vapor discharge device where the distance
between electrodes is less than the mean free path distance.
619 for a gas or vapor discharge device where the spacing
between the electrodes is such, when operated, to emit
visible light only by the negative or cathode glow
discharge.
Subclass:
621
Having electrodes with geometrical relationship:
This subclass is indented under subclass 567. Subject matter
wherein there are two electrodes spaced from each other in
terms of a geometrical condition.
(1) Note. The geometrical relationship involves the spacing
between electrodes in terms of being parallel, nonparallel,
concentric or other spatial relationship.
(2) Note. For classification here, the geometrical
relationship must be claimed or disclosed.
Subclass:
622
Discharge device with diverse electrodes:
This subclass is indented under subclass 567. Subject matter
wherein there are two electrodes which differ in their
structure or in the material composing the electrodes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
581 for a gas or vapor discharge device having three or more
electrodes at least one is different in structure of material
from the others.
609 for a gas or vapor discharge device where an electrode
is exterior to the device envelope.
616 for a gas or vapor discharge device having a cathode
which is provided with a positive or other shielding
structure.
Subclass:
623
Having electrode lead-in or electrode support sealed to
envelope:
This subclass is indented under subclass 567. Subject matter
wherein the envelope has an open end and means to seal the
open end of the envelope which includes and lead-in wire or
an electrode support sealed to the means to seal the
envelope.
(1) Note. Here are also the patents dealing with the
sealing of the ends of the envelope which are more than a
nominal recitation of the seal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43 for a lamp or discharge device having a temperature
modifier for a lead-in seal or stem protection.
SEE OR SEARCH CLASS:
65, Glass Manufacturing, subclass 49 for a process of
bonding metal to the glass part formed from shapeless mass in
a mold cavity, subclasses 59.1+ for a process of fusion
bonding of glass to a metal part and subclass 154 for an
apparatus for fusion bonding glass to metal.
174, Electricity: Conductors and Insulators, subclass 17.07
for a box or housing with a fluid or vacuum of the sealed
envelope type and subclasses 50.61+ for a box or housing of
the sealed envelope type with a bonded seal for a conductive
member.
Subclass:
624
End cap seal:
This subclass is indented under subclass 623. Subject matter
wherein the open end is closed by a closure which fits over
and about the end of the envelope to seal the envelope.
Subclass:
625
End plug seal:
This subclass is indented under subclass 623. Subject matter
wherein the open end of the envelope is closed by a closure
which fits into the open end to seal the envelope.
Subclass:
626
Having lead-in shield:
This subclass is indented under subclass 567. Subject matter
having means to shield the lead-in wire or a support from an
electrode.
(1) Note. The shielding means can be for the purpose of
preventing an electric discharge from being established
between the lead-in wire or support and another part of the
device or for preventing a deposit of sputtered material upon
the lead-in wire or supports, or for any other shielding
purpose.
SEE OR SEARCH THIS CLASS, SUBCLASS:
168 for liquid electrode discharge device which has an anode
and an anode lead-in wire in separate anode chambers.
169 for a liquid electrode discharge device having plural
anodes and a shield between the anodes and anode lead-in
wires to prevent a discharge there between.
239 for devices which are provided with a supporting and/or
spacing structure for a shield.
313 for devices provided with means to distribute or prevent
static charges or means to prevent deleterious electrical
discharges.
317 for devices of this class which include an envelope with
lead-in conductors.
590 for a three or more electrode gas or vapor discharge
device having a shield to prevent a discharge between two of
the electrodes.
594 for a three or more electrode gas or vapor device
wherein there is a grid or other apertured electrode arranged
within an anode shield.
614 for a discharge device having an anode shield to prevent
undesired discharges to the anode or anode lead-in.
616 for a discharge device having a shield to protect some
part of the device such as the cathode, from the effects of
positive ion bombarment.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 50.59
for hermetic sealed envelope with lead-in conductors of
general utility which has shielding means between the lead-in
conductors or the joint between the envelope and a lead-in
conductor.
Subclass:
627
Having electrode heated by space discharge current:
This subclass is indented under subclass 567. Subject matter
wherein the electrode is bombarded by a charged particle of
the ionized gas or vapor which constitutes the electrical
discharge within the envelope of the tube which is attracted
to the electrode by an electrical force.
(1) Note. The gas or vapor discharge is not restricted to
the discharge between the main electrodes of the tube.
(2) Note. All or part of the electrode is of
therminonically active material.
(3) Note. The discharge may be from electrons or ions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39 for a discharge device with a filament or a heated
cathode with means to modify the temperature of the cathode
of filament.
310 for a discharge device having a thermionic cathode.
346 for thermionic electrode, per se, and the notes to the
other subclasses and classes.
347 for an electrode which becomes incandescent when
subjected to electron bombarment.
558 for a lamp or discharge device with an electrode which
includes or is coated with a getter.
566 for a lamp or discharge device with a filament or a
heated cathode electrode which includes or is coated with a
vapor generating material.
567 for a gas or vapor discharge device particularly
subclasses 591+ for three or more electrode device having a
cathode heater.
Subclass:
628
Coil type:
This subclass is indented under subclass 627. Subject matter
wherein at least part of the electrode is in the form of a
wound spiral.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31 for a lamp or discharge device having a tubular hollow
coil electrode with a temperature modifier for the coil.
344 for a coiled resistance heated electrode, per se.
Subclass:
629
Having resistance heated cathode:
This subclass is indented under subclass 567. Subject matter
wherein the electrode is a cathode and the cathode is heated
by the passage of electrical current through it or indirectly
heated by the passage of an electrical current through a
resistive element.
(1) Note. For a gas or vapor discharge device having an
electrode heated by a space discharge current, see subclasses
627+.
(2) Note. Subclass 616 includes a cathode shield and a
heated electrode where the heated electrode when negative is
the cathode and the shield is used to prevent positive ion
bombardment of the electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37 for a lamp or discharge device with a temperature
modifier for a heated cathode.
310 for other discharge devices which have a directly heated
cathode or an indirectly heated cathode.
337 for an indirectly heated cathode, per se.
341 for a resistance heated cathode, per se.
591 for three or more electrode gas or vapor discharge
device having a heated cathode.
616 for a positive ion or cathode electrode shield.
627 for an electrode heated by space discharge current.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, 94 for
systems for supplying electrical energy to the cathode or
cathode heater of a discharge device.
Subclass:
630
Having electrode of alkali, alkaline or rare earth material:
This subclass is indented under subclass 567. Subject matter
wherein the electrode includes within the envelope, structure
or a material containing an alkali, alkaline or a rare earth
as an element or in compound form.
(1) Note. If composite electrode structure is an electron
emissive material coated or laminated electrode, see subclass
631.
(2) Note. See the "SEARCH THIS CLASS, SUBCLASS" notes in
subclass 631.
SEE OR SEARCH THIS CLASS, SUBCLASS:
326 for a discharge device electrode, particularly
subclasses 337+ for a indirectly heated cathode, subclasses
341+ for a resistance heated cathode and 346 for cathode
containing and/or coated with an electron emissive material.
591 for a three or more electrode gas or vapor discharge
device having a cathode heater.
618 for a gas or vapor discharge device having a hollow
cathode.
631 for an electron emissive coated or laminated electrode.
636 for a gas or vapor discharge device having an electrode
heated by space discharge current.
639 for a space discharge device having a resistance heated
cathode.
Subclass:
631
Having particular electrode structure:
This subclass is indented under subclass 567. Subject matter
wherein the structure of an electrode is significantly
recited.
(1) Note. See the general class notes, for an electrode
combined with connector structure and for an electrode/or
shield.
(2) Note. An electrode, per se, is not here. See
subclasses 326+ for an electrode, per se.
(3) Note. A gas or vapor lamp containing a coated electrode
is here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for a plural unit lamp or discharge device having at least
a discharge device with a control unit.
16 for a liquid electrode with an electric heater.
30 for a hollow electrode with temperature modifier.
39 for an electrode with a temperature modifier within an
envelope.
146 for a discharge device with movable electrode.
155 for a lamp or discharge device with a magnetic device
where an electrode generates a magnetic field.
163 for liquid electrode discharge device.
238 for a lamp or discharge device with support and/or
spacing structure for an electrode.
326 for an electrode structure for a lamp or discharge
device.
523 for photosensitive device having a photosensitive
electrode and subclasses 543+ for photocathode, per se.
558 for a lamp or discharge device where an electrode
includes a getter, supports a getter or is connected to a
getter.
566 for a lamp or discharge device having a vapor generator
having an electrode with vapor generating material.
574 for a gas or vapor discharge device having a particular
total or partial gas or vapor pressure.
581 for a gas or vapor, three or more electrode, discharge
device, particularly 591+ for a device with a cathode heater
with or without a control electrode, subclasses 595+ for a
start electrode between discharge electrodes and subclasses
601+ for start electrode not in main discharge path.
607 for a gas or vapor discharge device with an electrode
exterior on the outside of the envelope.
608 for a single electrode type gas or vapor discharge
device.
621 for a gas or vapor discharge device having a hallow
cathode.
627 for a gas or vapor discharge device having an electrode
heated by space discharge current.
629 for a gas or vapor discharge device having a resistance
heated cathode.
630 for a gas or vapor discharge device having an electrode
of alkali; alkaline or rare earth material in structure or
composition form.
Subclass:
632
Cathode or anode:
This subclass is indented under subclass 631. Subject matter
wherein the electrode is a cathode or an anode.
(1) Note. Included are lamps or discharge devices of the
gas or vapor type which operate on direct current or
pulsating current in one direction, for example, a flash
tube.
SEE OR SEARCH THIS CLASS, SUBCLASS:
633 for an electrode composition used in a discharge
device.
Subclass:
633
Electrode composition:
This subclass is indented under subclass 567. Subject matter
wherein the composition of an electrode is significantly
recited.
(1) Note. See the class definition for a discussion of
patents disclosing electrode compositions or materials for
use in gas or vapor lamps or discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
311 for a discharge device having an electrode of particular
material. Also, see the subclasses specified in the notes
for discharge devices having an electrode defined by
composition or material.
558 for an electrode which includes a getter or is coated
with a getter material.
566 for an electrode which includes a vapor generating
material or is coated with a vapor generating material.
627 for thermionic cathodes which are formed or coated with
a particular composition.
629 for resistance heated cathodes which include a
particular composition.
630 for an electrode which includes alkali, alkaline or rare
earth material.
634 for an electrode having particular structure.
SEE OR SEARCH CLASS:
252, Compositions, 500 for electrically conductive or
emissive compositions.
Subclass:
634
Envelope with particular structure:
This subclass is indented under subclass 567. Subject matter
wherein a structural detail of the envelope is significantly
recited.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25 for means in the space between the envelope walls for
modifying the temperature of the lamp or discharge device.
33 for an envelope provided with an internal temperature
modifying baffle.
34 for an envelope provided with a condensing chamber or
surface to cool the gas or vapor within the envelope.
44 for means to modify the temperature of the device (e.g.,
heat radiating means, etc..).
110 for optical means (e.g., lens, etc..) to modify the ray
energy passing through the envelope wall, see subclass 112
where the optical means is a polarizer, or filter, subclass
113 where the optical means is a reflector, subclass 116
where the envelope wall is light diffusing, and subclass 117
where the optical means is a light valve or light obscuring
means.
168 for liquid electrode (e.g., mercury) discharge devices
having a plurality of anodes, the envelope being provided
with separate anode chambers.
317 for a lamp or discharge device envelope with an
electrode or filament or where there is some significance in
the use of the envelope in a lamp or discharge device.
515 for a lamp or discharge device with character display
having a character shaped envelope.
547 for valve means for introducing a gas or vapor into or
withdrawing a gas or vapor from the envelope.
567 for a lamp of discharge device envelope with a gas or
vapor.
577 for a lamp or discharge device having particular total
or partial gas or vapor pressure having an envelope detail.
609 for a discharge device having a baffle, partition or
constricting means affecting discharge.
623 for discharge device having lead-in wire, electrode
support or electrode sealed to envelope including envelope
end seals.
636 for envelope compositions.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 17 for boxes
and housings filled with a fluid and subclasses 50+ for boxes
and housings with electrical features not restricted for use
in a lamp or discharge device.
206, Special Receptacle or Package, 0.6 for gas containers.
220, Receptacles, 2.1 for an envelope of an electric lamp or
similar device.
Subclass:
635
Envelope layer or coating:
This subclass is indented under subclass 634. Subject matter
wherein the envelope has a coating or layer on the internal
or external surface of the envelope.
(1) Note. The covering is considered structure. If the
coating is used as an electrode see the electrode
subclasses.
(2) Note. A glaze on the inside or the outside of the
envelope is considered structure.
SEE OR SEARCH CLASS:
118, Coating Apparatus, subclass 50 for vacuum or fluid
pressure chamber type coating apparatus and subclasses 620+
for coating apparatus using means to apply electrical and/or
radiant energy to work and/or coating material.
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
99 for methods of making an optically transparent sandwich.
427, Coating Processes, 106+ for processes for coating a
hollow electrical article or the product produced.
Subclass:
636
Envelope composition:
This subclass is indented under subclass 567. Subject matter
wherein the composition of the envelope is significantly
recited.
(1) Note. Here discharge devices including lamps and
electronic devices are classified.
(2) Note. Envelopes defined only by composition will be
found in the appropriate composition class. Also see the
class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for a special ray transmissive envelope formed of a
specific composition having optical properties, particularly
subclass 112 where the envelope wall includes a polarizing
composition or a light filtering material, subclasses 113+
wherein the envelope has material which has light reflecting
properties, subclass 116 wherein the envelope has light
diffusing material and subclass 117 wherein the envelope has
material with light valve properties or light obscuring
properties.
317 for an envelope of the lamp or discharge device with
electrical lamp or discharge device structure or there is
some significance in the use of the envelope in a lamp or
discharge device.
480 for an envelope composition of a cathode-ray tube.
SEE OR SEARCH CLASS:
501, Compositions: Ceramic, subclass 54 for a glass
composition containing greater than ninety per cent silica.
Subclass:
637
With particular gas or vapor:
This subclass is indented under subclass 567. Subject matter
wherein the gas or vapor within the envelope is defined in
terms of its composition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
161 for a lamp or discharge device with magnetic device and
a gas or vapor within lamp or device.
481 for a cathode-ray tube having a gas therein.
484 for a lamp or discharge device having a luminescent
solid or liquid and a gaseous discharge medium.
515 for a lamp or discharge device with character display
and a gaseous discharge medium.
538 for a gas phototube.
545 for a lamp or discharge device with a valve and gas or
vapor generating material.
546 for a lamp or discharge device with a frangible capsule
containing gas or vapor generating material.
547 for a lamp or discharge device with heating means to
control gas or vapor or gas or vapor generating means.
563 for a lamp or discharge device with gas generating
material.
564 for a lamp or discharge device with vapor generating
material.
568 for a lamp or discharge device having a particular total
or partial gas or vapor pressure.
580 for incandescent lamp having a tungsten-halogen cycle.
595 for a three or more electrode device having a gas or
vapor and a heated cathode.
SEE OR SEARCH CLASS:
252, Compositions, 372 for gaseous compositions and the
processes for making them.
423, Chemistry of Inorganic Compounds, 210 for modifying or
removing component of normally gaseous mixture and subclass
262 for an inert or noble gas or compound thereof, subclasses
351+ for nitrogen or compound thereof, subclasses 414+ for
carbon or compound thereof and subclasses 644+ for nitrogen
or compound thereof.
Subclass:
638
With metal vapor:
This subclass is indented under subclass 637. Subject matter
wherein the composition includes a metal vapor.
SEE OR SEARCH CLASS:
423, Chemistry of Inorganic Compounds, 155 for an alkaline
earth metal, subclasses 179+ for an alkali metal, compound,
subclasses 99+ for mercury containing compound, and subclass
263 for rare earth compound.
Subclass:
639
Mercury vapor:
This subclass is indented under subclass 638. Subject matter
wherein the composition of the vapor includes mercury vapor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
150 for a discharge device having a movable liquid mercury
electrode.
163 for a discharge device having a liquid mercury
electrode.
Subclass:
640
And rare earth metal:
This subclass is indented under subclass 639. Subject matter
wherein a rare earth metal is included in the composition.
(1) Note. The "rare earth" element are metallic in
character.
(2) Note. Misch metal is an alloy of iron with mixture of
rare earth metals.
(3) Note. The "rare earth" elements include the atomic
numbers from 57 to 71.
Subclass:
641
With rare gas:
This subclass is indented under subclass 640. Subject matter
wherein the composition includes a rare gas.
Subclass:
642
And rare gas:
This subclass is indented under subclass 639. Subject matter
wherein the composition includes a rare gas.
Subclass:
643
One or more rare gases:
This subclass is indented under subclass 637. Subject matter
wherein the composition includes at least one noble gas.
(1) Note. Many of the patents includes a mixture of noble
gases or gas of the noble type and another type gas.
(2) Note. The noble "gases" are helium, neon, argon,
krypton and xenon.
SEE OR SEARCH CLASS:
423, Chemistry of Inorganic Compounds, subclass 262 for an
inert or noble gas or compound thereof.
Information Products Division -- Contacts
Questions regarding this report should be directed to:
U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov
Last Modified: 6 October 2000