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 343
COMMUNICATIONS: RADIO WAVE ANTENNAS
Class Definition:
A. This is the generic class for antennas for the
transmission of radio wave energy through the natural media
(i.e., air, earth, water, etc.) for point-to-point
communication or for the reception of such transmitted radio
wave energy.
B. In this class are apparatus and systems which constitute
part of an antenna transmission or reception apparatus or
system and which are limited to use in connection with the
transmission and reception of radio wave energy, e.g.,
electromagnetic horns and arrays.
C. Exclusions:
1. This class excludes noncommunication applications
involving radio waves, such as resiation by radio waves for
therapeutic purposes or for measuring and testing a physical
parameter where no communications or signaling is involved.
2. Also excluded from this class are systems, such as
detector and receiver systems, oscillation generator systems,
modulator systems, amplifier systems, which are used as
component parts of radio wave energy transmission or
reception systems but which are of more general utility.
3. This class also excludes communication by electromagnetic
waves other than radio waves (e.g., by partial rays,
compressional waves, etc.). Communication restricted to rays
or visible light, heat, infrared, ultraviolet, X-rays,
cathode rays, ions, gamma rays, and beta rays, as well as
inductive coupling are excluded from this class.
See References to Other Classes, below.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
TELEDYNAMICS OTHER THAN SIGNALING:
See Class Definition, C, above for the radio wave energy
systems for controlling apparatus and mechanism other than
indicating or measuring instruments which are included in
this class. See subclass 7 of this class and the search
notes thereto for the miscellaneous systems for controlling
apparatus other than indicating and measuring instruments
which are classified in this class. See the classes
specified under "SEARCH CLASS" below for a reference to some
of the other classes which provide for radiant energy
controlled devices and apparatus.
COMMUNICATIONS:
Many classes provide for devices, apparatus and systems
useful in communicating information. For example, one class
provides for means for displaying information by printed or
painted cards, calendars, pictures, labels, tags and signs.
Another class provides for recording systems and recorders,
etc. Class 343 is primarily concerned with the information
conveyed by means of radio wave energy signals and with radio
wave energy teledynamics. Also see References with Other
Classes below.
SIGNALING:
For the relationship of Class 343 to the signaling classes,
see the classes referencing this section in References to
Other Classes, below.
MEASURING AND TESTING:
This class includes some patents for measuring, detecting,
and/or utilizing radio wave energy. The detection of
objects, or the use of radio wave energy to measure distance,
direction, and/or velocity of an object is included in this
class when the only measurement is of the amplitude of the
radio wave energy, or of the direction in which the energy is
transmitted or the direction from which the energy is
received, or where the duration of time the energy is being
propagated is measured, or where only the detection of radio
wave energy is involved. This class also includes the
measurement of the amplitude or intensity of the radiated
radio wave energy where the measurement is performed by
detecting and measuring the energy. Antennas combined with
structure for measuring the magnitude of the signal energy
flowing in, to, or from the antenna, a significant
relationship existing between the antenna and the measuring
structure, are classified in subclass 703 of this class.
For other measuring and testing, see References to Other
Classes, below.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
40, Card, Picture, or Sign Exhibiting, for means for
displaying information by printed or painted cards,
calendars, pictures, labels, tags and signs,
47, Plant Husbandry, subclass 1.3 for methods and apparatus
for culture of plants by means of electricity, including
radiating electrical energy.
73, Measuring and Testing, is the generic class for measuring
and testing methods and apparatus. The search notes to the
class definition of Class 73 should be consulted for other
classes which provide for measuring and testing processes and
apparatus. 570 for miscellaneous apparatus for testing
devices by means of vibratory forces (e.g., certain types of
compressional waves), see indented subclasses 584+ where
sound waves are used. Class 73 provides for measuring and
testing methods and apparatus which involve a radiant energy
test and a nonelectrical test. Class 136, Batteries:
Thermoelectric and Photoelectric, subclasses 200+ for
thermoelectric generators, particularly subclasses 213+ for
radiation (e.g., infrared) promoters. (see Lines With Other
Classes, "Measuring and Testing," above.)
89, Ordnance, subclass 1 and 41 for apparatus designed to
control and/or move a gun for aiming it towards a target,
including such apparatus where radiant energy is utilized and
subclass 1.5 for radiant energy actuated or controlled
devices for releasing bombs, flares, etc.., from aircraft.
91, Motors: Expansible Chamber Type, appropriate subclasses
for expansible chamber motors controlled by radiant energy.
102, Ammunition and Explosives, subclass 384 for drop bombs
with direction controlling means, including those controlled
by radiant energy, subclasses 416+ and the subclasses
specified in the notes thereto for explosive mines adapted to
be fixed automatically, for firing device of the mine being
actuated by electrical, magnetic, wave or radiant energy, and
the ignitors, per se, for such mines; and subclass 214 for
fuses, primers and igniting devices for explosives which
involve the utilization of electrical, magnetic, wave, or
radiant energy in their operation.
116, Signals and Indicators, is the generic class of
mechanical (nonelectrical) signaling; subclass 137 is the
generic subclass for mechanical sonic and supersonic
generators for wave transmission; see subclasses 18+ for code
signaling, including helios:graphic signaling. The signal in
Class 116 may be of any type that appeals to any one or more
of the senses, such as a bell, horn, whistle, semaphore,
light shutter, explosive device or flag. The classes
specified in the class definition of class 116 should be
searched for other nonelectrical signaling systems. See the
notes to Class 116 for the distinction between Class 116 and
the electrical classes. Class 116 includes code signaling,
including helios:graphic signaling. Class 116, subclass 27
provides for apparatus for the mechanical production and
reception of sound vibrations transmitter through bodies of
water (submarine signaling). (See Lines With Other Classes,
"Signaling" above )
136, Batteries: Thermoelectric and Photoelectric, see Lines
With Other Classes and Within This Class, Measuring and
Testing, above.
137, Fluid Handling, appropriate subclasses for fluid flow
control systems including radiant energy systems for valve
actuation.
178, Telegraphy, includes in many of the subclasses patents
where the sole disclosure is of a radiant energy telegraph
system, but the claims are not limited to radiant energy
transmission of the signals; see especially subclass 19 for
handwriting and drawing transmission systems, subclass 22 for
secrecy systems, subclass 43 for space induction systems,
subclasses 50+ for multiplex systems, and subclasses 58+ for
duplex systems, subclasses 66.1+ for miscellaneous systems
using alternating current (including high frequency current)
to transmit the signal (note that many of the patents in
Class 178, subclass 66.1 are closely analogous to the patents
in Class 375, subclasses 259+), and subclasses 371+ for
miscellaneous telegraph receivers. Also see the appropriate
subclasses in Class 178 for telegraph apparatus useful either
in radio or wire telegraphy, for example, subclasses 118+,
for receivers and subclasses 101+ for keys. (See Lines With
Other Classes, "Signaling" above)
181, Acoustics, is the generic class for inventions in sound
wave radiation, transmission or reception and instruments
specific thereto; see subclasses 18-22, for speaking tubes,
subclasses 126+, for anatomic or prosthetic relation, and
subclasses 177+, for megaphones. See the notes to Class 116
for other acoustical signaling systems. (see Lines With Other
Classes"Signaling" above),
181, Acoustics, 101, for mechanical means for geophysical
exploration, subclasses 123+, for mechanical sound echo
systems and subclass 125 for mechanical sound locating
devices for determining the direction from which a sound
proceeds. (see Lines With Other Classes, "Measuring and
Testing," above.)
191, Electricity: Transmission to Vehicles, subclass 10, for
systems for transferring energy from a roadway or other place
to a movable vehicle by means of electromagnetic induction.
194, Check-Controlled Apparatus, appropriate subclasses,
provides for coin controlled radios. (see Lines With Other
Classes, "Signaling", above.)
219, Electric Heating, subclass 553 provides for infrared
ray generating apparatus.
244, Aeronautics, subclass 3.1 for control means for
missiles and subclass 77 for systems for automatically
controlling aircraft by means of electrical apparatus and
radiant energy. Subclass 77 is the generic subclass for the
automatic control of the steering of mobile craft in two or
three dimensions where electrical means are utilized. See the
search notes to subclass 77 in Class 244 for the other
classes which provide for radiant energy controlled steering
and for a statement as to the lines between the classes.
246, Railway Switches and Signals, Note that class 246
contains a number of subclasses relating to "inductive"
control or actuation, i.e., where an inductive connection
rather than a physical contact being made. subclass 8
provides for inductive telegraphy or telephony in train
dispatching systems, subclass 63 for block signal systems
having cab signal or train of the inductive type, subclass
194 for train control of the inductive type for controlling
the train mechanism. Subclass 4, for train dispatching
systems having a train carried signal or train control
mechanism, the system including radiant energy control,
subclasses 29+ for block signaling systems in which traffic
control devices are controlled by radiant energy, see
indented subclass 30 where radio energy is used, and subclass
189 for radiant energy control systems for controlling the
engineer's brake valve on a train. (see Lines With Other
Classes, Signaling, above).
250, Radiant Energy, subclasses 200-239 are the generic
subclasses for photosensitive systems which are responsive to
visible light and for apparatus used with photocells,
subclass 250 provides for radio and microwave wavemeters for
measuring the length or frequency of radio or microwaves,
subclasses 281+ provides for methods and apparatus for the
ionic separation and or analysis of material on the basic of
the mass to electric change of ionic particles of the
material being separated or analyzed, subclasses 306+
provides for methods and apparatus of inspecting solid or
liquid material by charge particles, and subclasses 336.1+
provides for generic methods and apparatus for utilizing
invisible ray energy, such as, cathode rays, ultraviolet
rays, the radiations and emanations or radio-active
substances, for measuring and detecting purposes; and
subclasses 492.1+ is the generic place for methods and
apparatus utilizing invisible ray energy, such as ultraviolet
and infrared rays. (also see Lines With Other Classes,
"Measuring and Testing," above.)
250, Radiant Energy, contains patents for signaling by means
of radiant energy; see appropriate subclasses for the generic
transmission or reception of energy propagated in the form of
electromagnetic waves of subatomic, atomic or molecular
particles. (See Class Definition, Statement of Class
Subclass Matter.)
251, Valves and Valve Actuation, 129, for electrical valve
actuation.
307, Electrical Transmission or Interconnection Systems,
subclass 117 for switching systems controlled by radiant
energy.
313, Electric Lamp and Discharge Devices, appropriate
subclasses, provides for the structure of electronic tubes.
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, subclass 63 for arc lamps and other similar
consumable electrode discharge devices where the feeding of
the electrode is controlled by radiant energy, usually light
or radiant heat.
315, Electric Lamp and Discharge Devices: Systems, subclass
34, provides for radio tubes and other electronic tubes which
have an antennae within the envelope of the tube or otherwise
structurally combined with the tube. (see Lines With Other
Classes, Signaling, above).
315, Electric Lamp and Discharge Devices: Systems, see Lines
With Other Classes and Within This Class, Signaling, above.
Class 315 provides in 1 for circuits for energizing
cathode-ray tubes, subclass 10 for radiant energy controlled
cathode-ray tube circuits, subclasses 32+, for electronic
tubes which have a circuit element, such as a switch,
inductance, etc.., built into and structurally combined with
the electronic tube structure, and in subclasses 32 to 363
for systems where a gas or vapor tube or an electric lamp is
energized by or controlled by radiant energy, including radio
waves, see subclasses 149+ for radiant energy controlled
electric lamp and gas or vapor type electric space discharge
device systems.
318, Electricity: Motive Power Systems, subclass 16 for
electric motor systems where the motor is controlled or
supplied by space transmitted electromagnetic or
electrostatic energy (including radio energy), subclass 460
for electric motor systems controlled by sound or supersonic
vibrations, subclass 480 for electric motor systems
controlled by radiant energy (e.g., light).
324, Electricity: Measuring and Testing, is the generic
class for methods and apparatus for testing to determine
electrical properties by electrical means; 323, especially
subclasses 332+ and 344+ provide for ore detection
determination by electrical means, including the use of radio
waves, except such methods and apparatus which involve the
use of reflected or otherwise returned radio waves, the
excepted subject matter being in this class (343), subclasses
5+. Class 324 provides for electrical testing methods and
apparatus which include a test by means of radio waves and
another electrical test. (see Lines With Other Classes,
"Measuring and Testing," above.)
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, appropriate subclasses for
miscellaneous circuits supplying current or potential to
active devices such as an electron tube or circuits
controlling the current or potential utilizing an active
device such as an electron tube.
329, Demodulators, appropriate subclasses, for various types
of demodulators for extracting the intelligence modulated on
a high frequency wave.
330, Amplifiers, appropriate subclasses, for the various
types of amplifier systems.
331, Oscillators, appropriate subclasses, for electric
oscillation generators having utility in the radiant energy
communication systems of Class 343.
332, Modulators, appropriate subclasses, for modulators, per
se. (see Lines With Other Classes, Signaling, above).
333, Wave Transmission Lines and Networks, provides for wave
transmission lines or networks, which may be used for
communication purposes wherein the wave energy is guided or
constrained by a wave propagating medium of appreciable
electrical length with respect to the wave length of the
propagated energy. For example, 1 provides for plural
channel systems and subclasses 236+ provides for single
channel long lines having distributed electrical parameters,
such as parallel conductors, wave guides, and shielded lines.
This class also contains systems and networks useful in
communication with radiant energy. See particularly
subclasses 101+ for branched circuits with switching,
subclasses 109+ for directional couplers, subclasses 117+ for
hybrid type networks, subclass 13 for resonator type
breakdown discharge systems, e.g., T-R or R-T systems,
subclass 22 for dissipating terminations for long lines,
subclasses 24+ for coupling networks including filters,
equalizers, delay networks, and impedance matching networks,
and subclass 81 for attenuators. (see Lines With Other
Classes, Signaling, above).
334, Tuners, appropriate subclasses for tuner networks
adapted for use in radiant energy systems.
340, Communications: Electrical, is the generic class for
electric signaling. See 384.1 for electrically operated
audible signals such as bells and whistles. (see Lines With
Other Classes, Signaling, above).
342, Communications: Radio Waves Systems and Devices (e.g.,
Radar, Radio Navigation), appropriate subclasses for whole
radio wave systems and devices, or radio wave system or
device components other than antennas. See the "SEARCH CLASS"
references in Class 342 for the lines between radio wave
communication and the subject matter of other classes. (See
Class Definition, Statement of Class Subclass Matter.)
345, Computer Graphics Processing, Operator Interface
Processing and Selective Visual Display Systems, 326 for
computer operator interface processing and subclasses 418+
for computer s:graphics processing.
346, Recorders, for recording systems and recorders, etc..
348, Television, appropriate subclasses for television
systems whether the signals are transmitted by radiant energy
or otherwise. (see Lines With Other Classes, Signaling,
above).
356, Optics: Measuring and Testing, provides for measuring
instruments and processes involving reflection, refraction,
chromatic effects and other optical properties of light and
materials, that is, for devices which utilize visible light
and optical principles for the measurement of angles,
distances, chromatic effects and the intensity of light, flaw
analysis, and fiducial instruments not provided for
elsewhere; see 3 provides for range and height finders which
utilize visible light, subclasses 27+ for velocity or
velocity and height measuring apparatus, subclass 29 for the
measurement of relative velocity of a remote object by means
of apparatus having an optical element or a reticle, and
subclasses 138+ for the measuring of angles or axial
alignment by means of visible light. See subclasses 372+ and
388+ for the mensuration or configuration analysis of areas,
volumes or linear measurements of articles or indefinite
length materials or the measurement of distance traveled by a
scale or optical grid displaced relative to a remote fiducial
mark. Search subclasses 43+ optical pyrometers for the
determination of the temperature of bodies or the temperature
of light radiation for photos:graphic purposes by means of
relative intensity of radiation, color, or incandescence
comparison and subclasses 213+ for apparatus to measure the
intensity of light generally. (see Lines With Other Classes,
"Measuring and Testing," above.)
358, Facsimile and Static Presentation Processing,
appropriate subclasses facsimile systems whether the signals
are transmitted by radiant energy or otherwise. (see Lines
With Other Classes, Signaling, above).
361, Electricity: Electrical Systems and Devices, 173 for
photocell controlled relay and electromagnet circuits.
362, Illumination, appropriate subclasses for radiant energy
controlled illuminating devices, see especially subclass
276.
367, Communications, Electrical: Acoustic Wave Systems and
Devices, is the residual class for electroacoustic wave
signalling devices. (see Lines With Other Classes,
"Signaling", above).
367, Communications, Electrical: Acoustic Wave Systems and
Devices, appropriate subclass for means to transmit and
receive sonic or supersonic waves. (See Class Definition,
Statement of Class Subclass Matter.)
367, Communications, Electrical: Acoustic Wave Systems and
Devices, provides for apparatus for detecting objects and/or
determining their distance and/or direction which are
provided with means to transmit and receive sonic or
supersonic waves, the sonic or supersonic waves being either
generated or received by electrical means. See 87 for echo
systems, subclasses 118+ for distance or direction finding,
and subclasses 131+ for underwater systems. Note that the
acoustics class has similar apparatus. (see Lines With Other
Classes, "Measuring and Testing," above.)
369, Dynamic Information Storage or Retrieval, 6 for a
combined radio and phonography systems. (see Lines With Other
Classes, Signaling, above).
374, Thermal Measuring and Testing, subclass 122 is drawn to
determining the temperature of a body by use of a microwave
arrangement to measure the thermal radiation emitted by the
body. (see Lines With Other Classes, "Measuring and Testing,"
above.)
375, Pulse or Digital Communications, appropriate subclass
for apparatus for the transmission or reception of pulses
into or from free space, per se. (See Class Definition,
Statement of Class Subclass Matter.)
378, X-Ray or Gamma Ray Systems or Devices, 44, 51+, and 70+
for X-ray systems used for testing. (see Lines With Other
Classes, "Measuring and Testing," above.)
382, Image Analysis, appropriate subclass for pattern
recognition or image processing.
395, Information Processing System Organization, 80 for data
processing of robot control systems.
431, Combustion, subclass 79 for a fuel burner controlled by
a photoelectric type sensor.
434, Education, Demonstration, and Cryptography, 239 for
devices for instructing or training in the characteristics or
operation of navigational aids, such as radio beacons, blind
landing systems, direction finders, etc.; subclasses 1+ for
devices for instructing or training in characteristics or
operation of object detecting systems, such as radar or sonar
systems; and subclass 222 for patents relating to instruction
in the art of signaling, including instruction in the
operation of radio transmitters and receivers.
455, Telecommunications, for analog modulated carrier wave
and light wave communications.
505, Superconductor Technology: Apparatus, Material,
Process, 150 for high temperature (T[subscrpt]c[end
subscrpt] > 30 K) superconducting devices, and particularly
subclass 201 for antennas.
700, Data Processing: Generic Control Systems or Specific
Applications, subclasses 1-89 for generic data processing
control systems; and subclasses 90-306 for particular
application of data processing systems or calculating
computers.
701, Data Processing: Vehicles, Navigation, and Relative
Location, 200 for the application of a computer in the area
of navigation, particularly subclasses 207+ for position
determining equipment, and subclasses 300+ for determining
the relative location between two points. (see Lines With
Other Classes, "Measuring and Testing," above.)
704, Data Processing: Speech Signal Processing, Linguistics,
Language Translation and Audio Compression/Decompression,
200 for artificial intelligence
systems that process speech signals.
706, Data Processing: Intelligent Processing Systems and
Methods, various subclasses for artificial intelligence
systems that represent, apply, and acquire knowledge.
708, Electrical Computers: Arithmetic Processing and
Calculating, 1 for hybrid computers; subclasses 100+ for
digital calculating computers; and subclasses 800+ for
analog computers.
GLOSSARY:
ACTIVE ELEMENT
An element or network whose energy output is modified due to
the presence of a source of energy in the element or network
(other than the mere signal energy which passes through the
network) or an element or network in which the energy output
from a source of energy is controlled by the signal input.
ANTENNA ARRAY
A plurality of active antennas coupled to a common source or
load to produce a directive radiation pattern. Usually the
spatial relationship also contributes to the directivity of
the antenna.
ANTENNA COMPONENT
A portion of the antenna performing a distinct function and
limited for use in an antenna, as for example, a reflector,
director or active antenna.
ANTENNA COUNTERPOISE
Structure of conductive material most closely associated with
ground but insulated from or capacitively coupled to the
natural ground, and aiding in the function of the natural
ground, particularly where variations or limitations of the
characteristics of the natural ground interfere with its
proper function, and such structure being connected to the
terminal of the signal receiver or source opposing the active
antenna terminal.
ANTENNA COUPLING NETWORK
A passive network (which may be resistive, inductive or
capacitive or any combination thereof) for transmitting the
signal energy between the active antenna and a source or
receiver of such signal energy.
ANTENNA GROUNDING STRUCTURE
Ground, or structure most closely associated with or
simulating ground which is connected to the terminal of the
signal receiver or source opposing the active antenna
terminal, (i.e., the signal receiver or source is interposed
between the active antenna and this structure), for
establishing a reference potential level for operating the
active antenna.
ANTENNA INHERENT REACTANCE
This includes not only the distributed reactance of the
active antenna but also the natural reactance due to its
location and surroundings, as for example, the capacity
relation inherent in the position of the active antenna
relative to ground.
ANTENNA LEAD-IN
A conductive means (transmission line, feed line) for
conveying the signal energy between the active antenna and
the signal source or receiver, and extending directly from
the active antenna towards the source or receiver.
ANTENNA SHIELD
A conductive or low reluctance structure, such as a wire,
plate or grid which is adapted to be placed in the vicinity
of an active antenna to reduce, as by dissipation through a
resistance or by conduction to ground, undesired
electromagnetic radiation, or electric or magnetic fields,
which are directed toward the active antenna from an external
source or which emanate from the active antenna.
ANTENNA TUNING
Adjusting an inductance or capacity combined with the active
antenna but distinct and separate therefrom, the inductance
or capacity providing a reactance which combines with the
inherent reactance of the active antenna to establish a
resonance in a circuit including the active antenna, this
resonance being at a frequency other than the natural
electrical resonant frequency of the active antenna,
adjustment of the inductance or capacity changing this
resonance; or adjusting the length of an electrically long
linear antenna to alter the electrical resonance of the
antenna.
COMMUNICATION
The conveying or transferring of information; specifically a
system, as radio, telephone, telegraph for conveying or
transferring information. For a general statement of the
classes which include communication devices, apparatus and
systems, see section V below.
DIRECTOR
A conductive (usually metallic) structure (e.g., a rod) which
reradiates into free space impinging electromagnetic
radiation (waves) coming from or going to the active antenna,
the velocity of the reradiated wave having a component in the
direction of velocity of the impinging wave, thereby to
modify the radiation pattern of the active antenna, there
being no significant potential relationship between the
active antenna and the conductive structure.
DISTANCE
The space between two points, which may be immediately
juxtaposed or widely spaced.
ELECTROMAGNETIC WAVE POLARIZATION FILTER
Structure which acts directly on the electromagnetic wave to
filter out wave energy of an undesired polarization and to
pass wave energy of a desired polarization.
ELECTROMAGNETIC WAVE REFRACTOR
Structure which is shaped or positioned to delay or
accelerate transmitted electromagnetic waves, passing through
such structure, an amount which varies over the wave front,
to alter the direction of propagation of the waves emitted
from the structure with respect to the waves impinging on the
structure, or to bring the wave to a focus, or to alter the
wave front (such as to convert a spherical wave front to a
planar wave front or vice versa).
FREE SPACE
Space where the movement of energy in any direction is
substantially unimpeded, such as interplanetary space, the
atmosphere, the ocean and other large bodies of water or the
earth.
LOADED ANTENNA
An active antenna having an elongated portion of appreciable
electrical length and having additional inductance or
capacity directly in series or shunt with the elongated
portion so as to modify the standing wave pattern existing
along the portion or to change the effective electrical
length of the portion.
MESSAGE
A signal used to convey intelligence, such as telegraph
signals or telephone signals (e.g., speech). Message is used
in more limited sense than signal for the purpose of
classification in this class in that signal includes the
transmission of control impulses for operation mechanism
other than mere signal reproducers.
ORIENTING
Changing the direction of the antenna beam.
PARASITIC ELEMENT
A conductive (usually metallic) structure (e.g., rod) which
reradiates into free space impinging electromagnetic
radiation (waves) coming from or going to the active antenna,
the velocity of the reradiated wave having a component which
is in the same direction (director) as, or in the opposite
direction (reflector) to, that of the velocity of the
impinging wave.
RADIANT ENERGY
The energy (partially kinetic, partially potential)
associated with waves produced in free space by a space by a
source of energy, as light waves, electromagnetic radiations
(including radio wave), neutron and similar radiation,
subsonic, supersonic and sonic waves.
RADIATE
The emanation of energy into free space.
RADIO OR HERTZ WAVE
An electromagnetic wave whose frequency spectrum extends over
a range from somewhat above the frequency of audible sound
waves to somewhat below the frequency of heat and light
waves. Values of 10 kilocyles and 30,000 megacyles have been
given as the lower an upper limits of the range for radio
waves, although values exist beyond these limits. Radio waves
as here defined exclude compressional waves, light waves,
heat waves, infrared waves, ultraviolet waves, X-rays,
cathode rays, gamma rays, and ion beams. The radio waves are
produced by oscillations of electric change in an antenna.
REFLECTOR
A conductive structure, usually metallic (e.g., screen, rod
or plate) which reradiates back into free space impinging
electromagnetic radiation (waves) coming from or going to the
active antenna, the velocity of the returned wave having a
component in a direction opposite to the direction of
velocity of the impinging wave, thereby to modify the
radiation of the active antenna, there being no significant
potential relationship between the active antenna and the
conductive structure.
RESTRICTED SPACE
A space or medium which tends to confine the energy within
specified boundaries along a predetermined path, as wave
guides, hollow resonators, conductive wires.
SCANNING
Repeatedly moving the antenna beam over an area in space.
SIGNAL
Control impulse, wave energy, intelligence or message
conveyed, such as a sign, noise indication agreed upon,
understood and used to convey intelligence at a distance.
SWEEPING
Moving the antenna beam repeatedly along a single line (which
may be straight or curved) in space.
TELEGRAPHY
The transmission to a distance of signals, unlimited with
respect to the extent of the message communicated, by the
utilization of energy, the elements of the message being
selected or composed at will according to a prearranged
code.
TELEPHONY
The conversion of spoken or sound waves into energy which is
transmitted a distance and reconverted into sound waves for
reproduction of the speech or sounds.
SUBCLASSES
Subclass:
700
This subclass is indented under the class definition.
Subject matter and limited by claimed subject matter to
coupling electrical energy between free space and restricted
space, i.e., the radiation or collection of such energy
together with its transmission to or from a transmitter or
receiver, and not otherwise classifiable.
(1) Note. The free space may be interplanetary space,
atmospheric space, the earth, or large bodies of water, and
the electrical energy therein is radio wave energy covering
the range between long and extremely short waves. Excluded
are visible light, infrared and ultra violet radiation,
X-rays, and gamma rays, as well as compression wave energy,
either sonic or supersonic. The restricted space may be
either a wire transmission line or a wave guide type line,
and the electrical energy flowing therein is pulsating at the
frequency of the corresponding free space energy, which is
established by or establishes the energy flowing in the wire
transmission line or wave guide.
(2) Note. Since any conducting mass may function as a
radiator or collector of radio wave energy, the subject
matter classified here is specialized for use as an antenna.
The antennas as here classified are formed as a passive
conducting mass, which may be in the form of a metallic
current conductor, wave guide, or space discharge. This mass
in use is in direct engagement with free space to emit or
collect radio wave energy to or from free space, and is
coupled or connected to a source of energy or to a load. To
act as an antenna the mass usually has a particular shape of
dimension, or may have electrical circuit elements, namely,
resistance inductance, or capacity, associated therewith.
Included herein are devices designed to operate as an
antenna, but involving no particular structure and claimed in
combination with other electrical means, when no other class
provides for the claimed subject matter. See the Notes to
this subclass, below.
(3) Note. Combinations of an antenna and additional
nonperfecting structure, i.e., structure having an added
purpose or independent utility other than to perfect the
antenna, are classified as follows:
A. Combinations of an antenna and a diverse type art device
(i.e., nonradio device), such as an aircraft, water-borne
device, vehicle, or lamp, for example, wherein the antenna is
claimed by name only in combination with details of the
device, there being no significant relationship between the
nominal antenna and the diverse type art device, are
generally not classified in this or indented subclasses but
in the appropriate class taking such device.
B. Combinations of an antenna and a diverse type (i.e.,
nonradio device) art device including significant antenna
structure or wherein a significant relationship exists
between the antenna and the diverse type art device are
classified in this and the indented subclasses, where the
only structure of the diverse type device recited is
structure which permits the antenna to function as such
(e.g., supports the antenna, forms a ground plane or
reflector for the antenna, or makes a specific type antenna
necessary for use with the device). For example, the
combination of an antenna with a radio cabinet, aircraft,
watercraft, or vehicle, there being a significant
relationship between the antenna and the associated
structure, is classified in indented subclasses 702, 705+,
709+, and 711+, while subclasses 720+ is the residual
subclass for this subject matter. Where the other device is
recited merely in broad terms for such purposes as background
for the antenna or supporting the antenna, classification is
in the appropriate indented subclasses, such as in subclasses
878+ where the other device is a support.
C. Generally, where the antenna itself is designed to
function also as another device and significant antenna
structure is recited, as for example, a venetian blind or
water sprinkler, classification is in this and the indented
subclasses, subclasses 708, 710, 712, and 720+ being
especially pertinent. Where the antenna is broadly claimed,
and the other device is significantly claimed, classification
is with the other device. For example, a rubber mounted
vehicle bumper which may operate as an antenna is classified
in Class 293, Vehicle Fenders, subclass 88.
D. Combinations of an antenna and additional electronic
structure or system are generally classified with the
combination. For example, an antenna and a cabinet
containing some radio structure other than the antenna would
be classified in Class 455, appropriate subclasses,
especially subclasses 269+. However, where detailed antenna
structure is combined with additional electronic structure,
nominally recited, classification is in this and the indented
subclasses. For example, such terms as transmitter,
receiver, signal source, and load are considered nominal
recitation of the other structure. A plurality of antennas
combined with additional electronic structure nominally
recited is considered as detailed antenna structure with a
nominal electronic structure, and is classified in this and
the indented subclasses. A plurality of such nominal
elements, such as a plurality of transmitters, a plurality of
receivers, or a transmitter and receiver, are generally
considered nominal structure, which when combined with
detailed antenna structure are classified in this and the
indented subclasses. When the antenna is combined with a
nominal transmitter and receiver forming a duplex system,
classification is in Class 370, Multiplex Communications,
subclasses 276+ as a duplex system. The combination of an
antenna and electric space discharge device may be in this
class (343) where the combination performs the functions
there defined. Where the antenna includes an electric
discharge device, the discharge serving as a portion of the
antenna coupling, and wherein the combination performs no
function classified elsewhere, classification is in this
class (343) subclass 701. See Class 315, subclass 34 for a
space discharge device having an antenna within or integral
therewith and Class 325, especially subclass 384 for means
for coupling antennas to radio receivers by means of electron
tubes.
(4) Note.
A. Combinations of an antenna within the class definition and
additional structure for the purpose of improving or
perfecting the antenna in the performance of its primary
function, which is the radiation or collection of radio wave
energy together with the transmission of such energy to or
from the transmitter or receiver, are classified in this and
the indented subclasses where the structure claimed includes
significant antenna structure or is more than is provided for
in other classes. Examples of such subject matter are found
in indented subclasses 704, 872, 878, and 904; subclass 904
being the residuary home for such subject matter.
B. Combinations of an antenna with no significant antenna
structure with perfecting structure, such as a support,
connector or leadin, the combination not being peculiar to
antennas (i.e., the combination has more general application)
are classified in a more general class if such exists. For
example, the structure of a metallic antenna rod, whether
insulated or not, unlimited by modifications for radiating
purposes, together with a support is classified in Class 52,
Static Structures (e.g., Buildings), subclasses 108, 109,
110, 111+, 632, 633+, and 720+. Where the antenna is in the
form of a generalized conductor, whether insulated or not,
combined with lead-in or connector means, classification is
in Class 174, Electricity: Conductors and Insulators. Where
a nominal antenna is formed as a helical extensible spring,
classification is in Class 267, Spring Devices, subclass 74.
Where a nominal antenna is formed as a rod of adjustable
length with a joint for permitting such adjustment,
classification is in Class 287, Rod Joints or Couplings,
subclass 58.
C. Combinations of a nominal antenna or a nominal reflector
together with significant structure used with the antenna for
supporting, moving, signaling some condition of the antenna,
etc.., are not classified in this or the indented subclasses
where some other class provides for the claimed subject
matter (e.g., the support class provides for the significant
support structure and will also take the thing supported by
name only), even though the combination improves or perfects
the operation of the antenna or reflector. Such subject
matter is found in the classes which provide for the
significant structure used with the nominal antenna or
reflector. Situations of this nature are as follows (for an
exception, see (11) Note, below):
1. The combination of a nominal antenna or reflector together
with significant mechanism for moving the antenna or
reflector, is classified in Class 74, Machine Element or
Mechanism, especially subclass 1, where the mechanism is for
scanning, sweeping or orienting the antenna. The broad
recitation of a motor for driving the mechanism in this
combination does not preclude classification in this class
(74).
2. The combination of a nominal antenna or reflector together
with an electric motor and motor control means for moving the
antenna or reflector, is classified in Class 318,
Electricity: Motive Power Systems. See also the class
definition of Class 318.
3. Combinations of a nominal antenna or reflector together
with significant structure for providing a signal, indication
or alarm indicative of some condition of the antenna or
reflector, are classified in Class 116, Signals and
Indicators, where the signaling structure is mechanical in
nature, and in Class 340, Communications: Electrical, where
the signaling structure is electrical in nature. This
reference to Classes 116 and 340 does not include signals,
indicators or alarms actuated by the radio wave energy
collected or transmitted by the antenna. For example, Class
340 includes electrical signaling means for indicating the
direction in which the antenna is oriented, but Class 343,
subclasses 100+, includes direction finding radio systems.
4. Combinations of a nominal antenna together with
significant structure for transmitting electrical energy,
which may be signal energy, thereto and permitting movement
of the antenna are classified in the appropriate subclass of
Class 191, Electricity: Transmission to Vehicles. Where a
flexible extension for transmitting electrical energy between
relatively moving parts is combined with a reel,
classification is in subclasses 12.2+ of Class 191. The
addition of a drag to any of the combinations involving Class
191 as here set forth is sufficient to exclude such subject
matter from Class 191. For classification of such
combinations, see paragraph 6 under this section, subclass
707 below, and also the reference to Class 244, Aeronautics,
under "SEARCH CLASS", below.
5. Combinations of nominal antennas together with a support
are classified in Class 211, Supports: Racks, where the
support involves frame structures or a plurality of supports,
or supports a plurality of antennas; and in Class 248,
Supports, where the support is a single support or supports a
single antenna.
6. Combinations of a nominal antenna together with a reel are
classified in Class 242, Winding, Tensioning, or Guiding.
7. Combinations of a nominal antenna together with aircraft
structure along with such elements as a fair lead, a drag on
the free end of the antenna, and a reel or other extending
and retracting structure are classified in Class 244,
Aeronautics, subclass 1.
8. Combinations of a nominal antenna together with
significant electrical connector or terminal structure are
classified in Class 439, Electrical Connectors.
(5) Note. Subcombinations of an antenna which are not
otherwise classified and are specialized for use in an
antenna are classified in this and indented subclasses.
Examples of such subject matter are antenna components, such
as reflectors and directors. Radio wave lenses, refractors
and polarizing converters, which are usually associated with
an antenna or a wave guide, are also classified here.
(6) Note. Subcombinations merely amenable to use in an
antenna are classified with the subcombination. For example,
stock materials and other fabricated materials which may be
used in making an antenna are classified in such classes as
28, Textiles: Manufacturing, 29, Metal Working, 138, Pipes
and Tubular Conduits, and 139, Textiles: Weaving and 245,
Wire Fabrics and Structure. See the Search Notes under
subclasses 897, 900 and 907 below for a field of search for
such materials.
(7) Note. The electrical energy coupled by the antennas of
this and the indented subclasses is ordinarily signaling
energy for such purposes as communication and telemetering.
Also included are antennas and reflectors which are analogous
in structure to those used in communication and telemetering.
Many other classes provide for apparatus for treating
persons or materials with radiated electromagnetic waves and
include antennas and reflectors which are specialized for
such use. See, for example, Class 422, Chemical Apparatus
and Process Disinfecting, Deodorizing, Preserving, or
Sterilizing, subclasses 221+ for processes and apparatus for
preserving, disinfecting and sterilizing, which may involve
electromagnetic waves; Class 99, Foods and Beverages:
Apparatus, subclass 451, for apparatus for treating foods
with electromagnetic waves. Class 128, Surgery, particularly
subclasses 404+, for electrical applicators for treating the
human body; Class 134, Cleaning and Liquid Contact With
Solids, subclass 1, for cleaning and liquid contact with
solids involving a electromagnetic wave energy; Class 204,
Chemistry: Electrical and Wave Energy, appropriate
subclasses, for chemical processes involving electromagnetic
wave energy; Class 219, Electric Heating, subclass 10.55, for
structure for heating a device or material by subjecting it
to a field of electromagnetic wave radiation; Class 250,
Radiant Energy, subclasses 493+, for structure generating and
applying ray energy; and Class 426, Food or Edible Material:
Processes, Compositions, and Products, subclasses 234, 235,
236, and 237+, for processes involving the application of
electromagnetic waves in the treatment of edible material.
(8) Note. There are other classes which provide for
structures which project or extract to or from space, earth,
or water signaling energy which is wave energy and may be in
the form of electromagnetic wave energy (other than radio
waves); and such subject matter is not classified in this and
the indented subclasses. For example, this subject matter
may be found in the following classes and subclasses: 116,
Signals and Indicators, subclasses 18+ for visual or audible
code signaling, subclass 27 for submarine sound signaling,
and subclasses 137+ for horns, whistles and compressional
wave generators for signaling; 178, Telegraphy, subclass 43
for space induction telegraph systems; 181, Acoustics,
appropriate subclasses for acoustical signaling systems and
subclass 175, for sound modifying means; 200, Electricity:
Circuit Makers and Breakers, subclasses 61.01 and 61.02 for
electric circuit makers and breakers responsive to sound and
light respectively; 246, Railway Switches and Signals,
subclasses 8, 63 and 194 for inductive type railway signaling
systems; 336, Inductor Devices, appropriate subclasses, for
the structure of inductor devices, per se, which may be used
in inductive type signaling systems; 340, Communications:
Electrical, subclasses 4+ for under water compressional wave
signaling systems, and especially subclasses 8+ for
compressional wave transducers; subclasses 15.5+ for earth
propagated compressional wave signaling systems; subclasses
366+ for visual electrical signaling; and subclass 384.1 for
audible electrical signaling; 359, Optics: Systems
(Including Communication) and Elements, subclasses 109+ for
light wave communications.
(9) Note. Communication or signaling systems including an
antenna as an element or subcombination are classified with
the system. Such communication systems which may include an
antenna as an element or subcombination thereof are
classified in Class 246, Railway Switches and Signals,
subclass 30 for railway block-signal systems involving
Hertzian waves (See also the reference to Class 246 in
References to Other Classes, in the Class Definition, above);
Class 250, Radiant Energy, for radiant energy systems which
may include an antenna (See also the references to Class 250
in Lines With Other Classes and Within This Class, Signaling,
and Measuring and Testing, above; and References to Other
Classes, above, in the class definition of this class (343),
and under the Notes to this subclass (700); Class 318,
Electricity: Motive Power Systems, subclasses 16 and 480 for
motor control systems involving radiant energy; Class 340,
Communications: Electrical, subclasses 189+ and 224 for
signaling systems involving radiant energy; and this class
(343) subclasses 5+ for reflected and/or otherwise returned
wave systems, subclasses 100+ for directive systems; Class
370, Multiplex Communications, for duplex and multiplex
systems.
(10) Note. Antennas within the subclass definition combined
with a lightning arrester are classified in subclass 904 of
this class. Lightning arresters generally are classified in
Class 361, Electricity: Electrical Systems and Devices,
subclass 40 for lightning arresters. Lightning arresters
where the only structure is an arc or spark gap are
classified in Class 313, Electric Lamp and Discharge Devices.
Lightning arresters combined with thermal switches are
classified in Class 200, Electricity: Circuit Makers and
Breakers, subclass 115.
(11) Note. As between Class 333, Wave Transmission Lines
and Networks, and this and indented subclasses, the
combination of an antenna and its coupling network, whether
single or plural channel, where the antenna is only nominally
recited, is classified in this and the indented subclasses.
(12) Note. As between loop antennas and the inductor
devices of Class 336, Inductor Devices, the claiming of an
antenna by name only or structure peculiar to antennas
together with inductor structure would classify the patent in
this class (343), subclasses 700+, and particularly
subclasses 866+. If the disclosure is a loop antenna, but
the claims recite merely an inductor device, classification
is in Class 336.
SEE OR SEARCH CLASS:
29, Metal Working, 600, for a method of making an antenna or
other wave-energy "plumbing" device not elsewhere
classified.
52, Static Structures (e.g., Buildings), appropriate subclass
for a residual elongated or openwork structure which may be
disclosed or merely defined as an antenna, particularly
subclass 40 for a shaft or tower with an article support,
108 for a strip-like unit which is reversibly flexible and
rigid, 110 for an elongated member attached to a vehicle
shell, 111+ for a mechanism operated or relatively movable
assembly, 632 for an axially extensible shaft or openwork,
633+ for a residual openwork structure, e.g., tower, mast,
grating, etc.., and 720+ for a residual rigid elongated
structure.
60, Power Plants, appropriate subclasses for fluid actuated
devices which may be used for extending or retracting an
antenna to its operative or inoperative position.
74, Machine Element or Mechanism, for mechanisms for
controlling the position of an antenna, and particularly
subclass 1 for mechanisms for imparting scanning, sweeping
or orienting motion to an antenna.
99, Foods and Beverages: Apparatus, subclass 451, for
apparatus for treating foods with electromagnetic waves.
114, Ships, subclass 311 for drags or sea anchors.
116, Signals and Indicators, for mechanical signaling or
indicating structure which may be used with an antenna.
134, Cleaning and Liquid Contact With Solids, subclass 1 for
cleaning processes including application of electrical,
radiant or wave energy to the work.
139, Textiles: Weaving, subclass 425 for fabric materials
including metal which may be used as an antenna.
174, Electricity: Conductors and Insulators, subclass 3 for
lightning rod conductor structure, subclasses 6+ for earth
grounds in general which may be used with antennas,
subclasses 35+ for anti-inductive structures involving a
shield or screen, subclass 45 for towers, poles or posts for
supporting overhead conductors, subclasses 68.1+ for cables
and conductors which may be used in antennas, and subclasses
137+ for antenna insulators, and particularly subclasses 151+
for antenna insulators through a wall or plate.
188, Brakes, 378 for vibration dampers which use the inertia
of a damping mass to dissipate motion; and subclass 381 for
dampers using friction between damper elements to dissipate
motion.
191, Electricity: Transmission to Vehicles, for means for
transmitting electrical energy between relatively moving
parts, one of which may be a movable antenna, and
particularly 12.2 where a reel is involved, and subclasses
22+ where a conductor presenting a substantially continuous
exposed surface along the path of movement for contact with a
collector is involved.
200, Electricity: Circuit Makers and Breakers, for structure
adapted for switching signal energy to or from an antenna.
204, Chemistry: Electrical and Wave Energy, for electrical
or wave energy processes and apparatus.
205, Electrolysis: Processes, Compositions Used Therein, and
Methods of Preparing the Compositions, appropriate subclasses
for electrolytic processes and selected electrolytic
products.
211, Supports: Racks, for frame structure supporting means
which usually involve a plurality of supports or a support
for a plurality of articles which may be antennas.
219, Electric Heating, 600 for inductive heating, subclasses
678+ for microwave heating, and subclasses 764+ for
capacitive dielectric heating.
242, Winding, Tensioning, or Guiding, 370, particularly
subclasses 390.2, 390.3, and 917 for a reeling device on
which a flexible antenna may wound.
244, Aeronautics, subclass 1 for miscellaneous aircraft
structure including fairlead structure, in combination with a
wire or cable, which may be a trailing antenna, and which may
include a drag at the free end of the wire or cable.
246, Railway Switches and Signals, subclass 8, 63, and 194
for inductive signaling systems which may involve inductive
coupling devices similar to loop antennas; and subclass 30
for Hertzian wave systems involving antennas. See also the
reference to Class 246 under References to Other Classes in
the class definition of this class (343).
248, Supports, for supporting structure usually involving
single supports or supporting a single article which may be
an antenna.
293, Vehicle Fenders, subclass 136 for vehicle bumpers with
rubber mounting means, which may be used as antennas.
307, Electrical Transmission or Interconnection Systems, for
miscellaneous electrical transmission or interconnection
systems not otherwise classified. See particularly 11 for
plural load systems, subclasses 43+ for plural supply
systems, subclasses 89+ for anti-induction systems, and
subclasses 112+ for switching systems.
312, Supports: Cabinet Structure, subclass 7.1 for radio
type cabinets.
315, Electric Lamp and Discharge Devices: Systems, subclass
34 for the structural combination of an electric discharge
device and an antenna, integrally united.
318, Electricity: Motive Power Systems, for motor control
systems which may be used for controlling the position of
antennas, particularly for such purposes as scanning,
sweeping, or orienting.
324, Electricity: Measuring and Testing, see Lines With
Other Classes and Within This Class, Measuring and Testing,
in the class definition of Class 343.
332, Modulators, subclass 174 for absorption type amplitude
modulators which may include a directive antenna.
333, Wave Transmission Lines and Networks, 1 for plural
channel wave transmission systems which may be used for
coupling antennas to their transmitters or receivers, which
may involve impedance matching, directional couplers, hybrid
type networks and switching in addition; subclass 22 for
dissipating terminations for long lines which may simulate
the power absorbing characteristics of antennas; subclass 23
for artificial lines which may simulate the impedance
characteristics of an antenna over a frequency range;
subclasses 24+ for coupling networks for coupling an antenna
to its source or load, which may involve balanced to
unbalanced coupling networks, delay networks, impedance
matching, equalizers, and wave filters; subclasses 219+ for
resonators of the distributed parameter type; and subclasses
236+ for long lines. See (11) Note immediately above. See
also the reference to Class 333 in References to Other
Classes in the class (343) definition.
336, Inductor Devices, appropriate subclasses, for inductor
structure, per se, including coils and coil structure which
may be used as loop antennas or in the coupling systems of
antennas. See (12) Note, above.
340, Communications: Electrical, 853.1 for telemetering via
a radiant energy beam. See also (4) Note, C, 3 and (8) Note
above, and Lines With Other Classes and Within This Class,
Signaling, and Measuring and Testing, in the class definition
for this class (343) and the reference to Class 340 in
References to Other Classes in the class definition of Class
343.
342, Communications: Directive Radio Wave Systems and
Devices (e.g., Radar, Radio Navigation), subclasses 1-205
for reflected or otherwise returned radio wave energy systems
which are characterized by some quality that varies according
to the relative direction, position or plane of polarization
of the sender and receiver, which may include and antenna.
See Class 455 for transmitter and receiver, which may include
and antenna. See Class 455 for transmitter and receiver
systems where such directive properties are not present.
359, Optics: Systems (Including Communication) and Elements,
483 for optical polarizers, subclasses 642+ for optical
lenses, subclasses 838+ for optical reflectors and subclasses
350+ and 885+ for optical filters.
362, Illumination, for illuminating devices which often are
structurally similar to antennas; particularly subclass 19
for illuminating means with a polarizer; subclass 327 for
combined reflectors and refractors; subclasses 341+ for
reflectors and subclasses 326+ for refractors.
375, Pulse or Digital Communications, for pulse communication
apparatus having an antenna.
403, Joints and Connections, appropriate subclasses for a
joint or coupling which may be used in an antenna. See
especially 52 for articulated connections.
426, Food or Edible Material: Processes, Compositions, and
Products, subclass 234, 235, 236, and 237+, for processes
involving the application of electromagnetic waves in the
treatment of foods.
439, Electrical Connectors, for electrical connector or
terminal structure which may be used in antennas. See also
(4) Note, C, 8, above.
455, Telecommunication, particularly subclass 6, 19, 25, 82,
83, 107, 121+, 129, 131, 193, and 269+ for analog modulated
carrier wave communication systems with antenna structure.
607, Surgery: Light, Thermal, and Electrical Application,
115 for electrical applicators for treating the human body.
Subclass:
701
This subclass is indented under subclass 700. Subject matter
wherein the antenna includes an electric discharge device,
the space discharge of this device serving as a portion of
the antenna or the antenna coupling.
(1) Note. When the combination of the antenna and discharge
device performs some function in addition to the antenna
function, and structure performing such additional function
is classified elsewhere, classification is with such
structure. For example, the combination of antenna and
discharge device is Classified in Class 455,
Telecommunications, subclasses 129 and 269+, if the tube
operates as an oscillator or detector, the combination being
a transmitter or receiver respectively, or in this class
(343), subclasses 350+ if in addition the combination is
directive.
(2) Note. For the space discharge to serve as the antenna
coupling as defined above, the discharge must actually convey
the signal energy. The mere control of the discharge by the
signal device as in the conventional amplifier triode is not
sufficient for classification here.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
34 for the structural combination of an antenna integral
with a space discharge device.
342, Communications: Directive Radio Wave System and Devices
(e.g., Radar, Radio Navigation), 350 for directive
transmitting and receiving systems, which may include
electric space discharge devices combined with antennas. See
also (1) Note above.
455, Telecommunications, subclass 291 for means for coupling
antennas to radio receivers by means of electron tube means.
Subclass:
702
This subclass is indented under subclass 700. Subject matter
wherein the antenna is combined with the cabinet which
encloses the receiving or transmitting structure in such
manner that a significant relationship exists between the
antenna and cabinet.
(1) Note. A significant relationship may exist between the
antenna and the cabinet when the antenna and cabinet have a
common portion, when the antenna retracts into the hollow
cabinet, when the antenna is shaped to correspond to the
cabinet shape, or when the antenna is contained within the
cabinet. However, when the cabinet is a mere support for the
antenna mounted externally thereon, classification is not in
this subclass, but in subclasses 878+, below.
(2) Note. Antennas combined with a housing or protective
covering for the antenna alone are not classified in this
subclass but in subclass 872, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
872 for antennas with a housing or protective covering. See
(2) Note, above.
878 for antennas with a support. See (1) Note, above.
SEE OR SEARCH CLASS:
312, Supports: Cabinet Structure, subclass 7.1 for radio
type cabinets.
455, Telecommunications, 269 for radio cabinets combined
with antenna positioning or support means.
Subclass:
703
This subclass is indented under subclass 700. Subject matter
wherein the antenna is combined with structure which tells
the magnitude of the signal energy flowing to, in, or from
the antenna, and wherein a significant relationship exists
between the antenna and this measuring structure.
(1) Note. Patents within the general subclass definition
involving testing are classified in this subclass, if the
testing involves measuring as herein defined.
(2) Note. Antennas combined with a signal, indicator, or
alarm which indicates some condition of the antenna are
classified in subclasses 760 and 894 below. Also, patents
within the general definition involving testing are
classified in subclass 894 below, if the testing involves
indicating as there specified without measuring.
(3) Note. See (1) and (2) Notes above for statements
concerning testing.
(4) Note. A significant relationship may exist when the
measuring structure and active antenna share a common detail,
or when the measuring device is coupled to the antenna where
the voltage or current is critical, such as a standing wave
node or anti-node, or when details peculiar to an antenna are
necessary for the operation of measuring structure. See also
Lines With Other Classes and Within This Class, Measuring and
Testing, under the class definition for this class (343).
SEE OR SEARCH CLASS:
324, Electricity: Measuring and Testing, particularly 76.11
for measuring electrical energy generally.
342, Communications: Directive Radio Wave Systems and
Devices (e.g., Radar, Radio Navigation), 417 for direction
finding receivers which involve, in addition to the measuring
structure responsive to the magnitude of the signal energy,
structure for showing the location of a remote signal
source.
455, Telecommunications, 67.1 and 226.1 for means for
testing and calibrating radio systems and/or receivers.
Subclass:
704
This subclass is indented under subclass 700. Subject matter
wherein the antenna includes means which prevents or reduces
ice, snow or sleet accumulation, such as heating apparatus or
material having a low freezing point.
SEE OR SEARCH THIS CLASS, SUBCLASS:
904 for antennas combined with structure for perfecting the
antenna not otherwise classified.
SEE OR SEARCH CLASS:
62, Refrigeration, subclass 80, 140, 151, 234, and 272+ for
refrigeration processes and apparatus involving defrosting,
and subclasses 73 and 349+ for congealed product making with
thawing.
138, Pipes and Tubular Conduits, 32 for pipes and tubular
conduits with thawing and freeze prevention.
165, Heat Exchange, 47 for a structurally installed heat
exchanger.
191, Electricity: Transmission to Vehicles, subclass 62 for
structure transmitting electricity to vehicles with ice
preventers or clearers.
219, Electric Heating, appropriate subclasses for electric
heating means.
244, Aeronautics, subclass 134 for aircraft structure with
ice prevention.
252, Compositions, subclass 70 for compositions including
those for frost prevention and ice thawing.
336, Inductor Devices, 55 for inductor devices with
temperature modifying means.
340, Communications: Electrical, 387.1 for audible
electrical weatherproofing signaling means which may be
combined with devicers.
Subclass:
705
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with, or has at least
a part in common with at least a part of, a device
peculiarity adapted to travel or be suspended in the air such
as an airplane, balloon, projectile, or guided missile, and
wherein a significant relationship exists between the device
and the active antenna.
(1) Note. A significant relationship exists when the
details of the active antenna cooperate with details of the
aircraft device, as when the antenna is shaped in accordance
with the shape of the device.
(2) Note. Where the device with which the antenna is
combined is a watercraft or vehicle, not peculiarly adapted
or limited to travel or to be suspended in the air,
classification is not here but in subclasses 709+ and 711+
below, as qualified by (3) Note.
(3) Note. Combinations of an antenna and aircraft when the
aircraft is a mere support, and the antenna could be
supported as well on some other object, are not classified in
this subclass, but in subclasses 878+ below.
(4) Note. Combinations of specific aircraft structure and a
nominal antenna are not classified in this subclass, but in
Class 244, Aeronautics.
SEE OR SEARCH THIS CLASS, SUBCLASS:
709 for antennas combined with watercraft.
711 for antennas combined with a vehicle.
877 for antennas with a reel.
878 for antennas with a support.
SEE OR SEARCH CLASS:
102, Ammunition and Explosives, particularly 335 and 405,
for aerial type mines and pyrotechnics which travel through
the air, respectively.
244, Aeronautics, for aircraft structure in general. See
also (1) Note, above.
Subclass:
706
This subclass is indented under subclass 705. Subject matter
wherein at least a portion of the active antenna is
maintained in an elevated position by a lighter-than-air
device, e.g., balloon.
(1) Note. The antenna may be mounted on the device to move
about freely therewith, or one end may be secured to the
ground and the other end maintained by the device in an
elevated position.
SEE OR SEARCH CLASS:
102, Ammunition and Explosives, subclass 348 and 354 for
pyrotechnics combined with balloons.
244, Aeronautics, subclass 30 and 31+ for lighter-than-air
airships and balloons, respectively.
Subclass:
707
This subclass is indented under subclass 705. Subject matter
wherein the active antenna is an elongated flexible mass
suspended from the aircraft, or the active antenna is
suspended from the aircraft by an elongated flexible support
so that the antenna will trail from the aircraft as by the
relative motion between the aircraft and the surrounding
air.
SEE OR SEARCH THIS CLASS, SUBCLASS:
709 for water-borne trailing antennas.
877 for antennas with reels.
SEE OR SEARCH CLASS:
114, Ships, subclass 311 for drags or sea anchors.
188, Brakes, 378 for vibration dampers which use the inertia
of a damping mass to dissipate motion; and subclass 381 for
dampers using friction between damper elements to dissipate
motion.
244, Aeronautics, subclass 1 for aircraft with trailing
structure, which may be a nominal antenna.
Subclass:
708
This subclass is indented under subclass 705. Subject matter
wherein the active antenna and the device have a common
portion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
710 for antennas with watercraft wherein the watercraft have
a part in common with the active antenna.
712 for antennas with a vehicle wherein the vehicle or part
thereof is a part of the active antenna.
720 for antennas with a diverse type art device wherein the
device and antenna have a common portion.
Subclass:
709
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with, or has at least
a part in common with at least a part of a device peculiarly
adapted for travel or to be suspended in water, such as a
surface ship, submarine, torpedo, buoy or other floating
structure and wherein a significant relationship exists
between the device and the active antenna.
(1) Note. A significant relationship exists when the
details of the active antenna cooperate with details of the
watercraft device, as when the antenna is shaped in
accordance with the shape of the device.
(2) Note. Where the device with which the antenna is
combined is a vehicle not peculiarly adapted or limited to
travel or be suspended in the water, classification is not
here but in subclasses 711+ below, as qualified by (3) Note
immediately following.
(3) Note. Combinations of an antenna and watercraft when
the watercraft is a mere support, and the antenna could be
supported as well on some other object, are not classified in
this subclass, but in subclasses 878+ below.
(4) Note. Water buoyant antennas are classified here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
705 for antennas combined with an aircraft.
707 for aircraft with a trailing or drag type antenna.
711 for antennas combined with a vehicle.
719 for antennas buried underground or submerged under
water.
878 for antennas with a support.
SEE OR SEARCH CLASS:
114, Ships, for ships and watercraft in general, and
particularly subclass 311 for drags and sea anchors.
441, Buoys, Rafts, and Aquatic Devices, 1 for buoys.
Subclass:
710
This subclass is indented under subclass 709. Subject matter
wherein the active antenna and the device have a common
portion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
708 for antennas with aircraft, wherein the aircraft is part
of the active antenna.
712 for antennas with a vehicle wherein the vehicle is a
part of the active antenna.
720 for antennas with diverse type art devices which may
have a common portion.
Subclass:
711
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with, or has at least
a part in common with at least a part of, vehicle structure
or accessories peculiarly adapted for use with a vehicle, and
wherein a significant relationship exists between the antenna
and vehicle or accessory structure.
(1) Note. A significant relationship exists when the
details of the active antenna cooperate with details of the
vehicle, as when the antenna is shaped in accordance with the
vehicle shape.
(2) Note. Where the combined vehicle structure is part of a
ship, submarine, aircraft or any similar vehicle having
structure limiting it to use in air or water, classification
is not here. See the search notes below.
(3) Note. Combinations of an antenna and vehicle when the
vehicle is merely a support for the antenna, and the antenna
could be supported as well on some other object, are not
classified here. See the search notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
705 for antennas combined with vehicles or devices which
travel or are suspended in air. See (2) Note, above.
709 for antennas combined with watercraft. See (2) Note,
above.
878 for antennas with supports. See (3) Note, above.
SEE OR SEARCH CLASS:
246, Railway Switches and Signals, particularly subclass 8
and 30 for railway signaling devices and systems.
280, Land Vehicles, for vehicles and related subject matter.
See also the general notes therein.
Subclass:
712
This subclass is indented under subclass 711. Subject matter
wherein the active antenna and vehicle structure or accessory
have a common portion.
(1) Note. The active antenna or portion thereof may
constitute an element of the vehicle, or conversely the
vehicle or portion thereof may constitute an element of the
active antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
708 and 710, for antennas having a portion in common with a
device traveling or suspended in air or water, respectively.
720 for antennas combined with a diverse type art device.
729 for plural diverse type antennas using the same active
element.
846 for grounding structure having a portion in common with
a vehicle.
SEE OR SEARCH CLASS:
293, Vehicle Fenders, particularly subclass 136 for vehicle
bumpers with mounting means which may be of rubber or other
insulating material, wherein the bumper may be used as an
antenna.
Subclass:
713
This subclass is indented under subclass 711. Subject matter
wherein the body of the vehicle serves as a support or
supporting base for the antenna.
(1) Note. For classification in this subclass the antenna
must be combined with the vehicle shell or body, which in the
case of an automobile is mounted on the running gear
(chassis). The body includes the top, hood, fenders, doors,
windshield, cowl, etc.., as opposed to accessories such as
bumper, spare tire, mirror, turn indicator, etc.., which
latter group when combined with an antenna, may be classified
in subclass 711, above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
718 for antennas which are adapted to be attached to or
carried by the human body.
720 for antennas combined with a diverse type art device.
878 for antennas with supports.
SEE OR SEARCH CLASS:
105, Railway Rolling Stock, appropriate subclasses, for
railway rolling stock body structure.
180, Motor Vehicles, 89 for motor vehicle bodies.
293, Vehicle Fenders, subclass 136 for vehicle fenders with
rubber mounting means or the like.
296, Land Vehicles: Bodies and Tops, for land vehicles
bodies and tops.
Subclass:
714
This subclass is indented under subclass 713. Subject matter
wherein the active antenna or a portion thereof is movably
supported on the vehicle body together with structure
controlled within the body for moving the antenna for such
purposes as adjusting the operative position of the antenna
or moving the antenna from an operative to an inoperative
position, e.g., extending or retracting a rod antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723 for single linear antennas adjustable in length which
have an appreciable wave length dimension.
757 for antennas combined with means for moving such
antennas for scanning, sweeping or orienting.
823 for centered balanced doublet antennas adjustable in
length.
869 for loop antennas with a rotatable support.
877 for antennas with a reel for winding such antennas. See
also the search notes thereunder.
880 and 889, for antennas with an adjustable or collapsible
support, and for rod type antennas retractable into a
support, respectively.
901 for telescoping rod type antennas.
Subclass:
715
This subclass is indented under subclass 713. Subject matter
wherein the active antenna is of the rod type as defined in
subclass 900, below.
(1) Note. See (1) Note under subclass 900 below for the
lines between rod type antennas and rod structure as found in
classes such as 52, Static Structures (e.g., Building), and
174, Electricity: Conductors and Insulators.
SEE OR SEARCH THIS CLASS, SUBCLASS:
714 for a combined vehicle and rod type antenna whose
position is changed or which may be extended or retracted by
control means situated inside the vehicle.
900 and the search notes thereunder, for rod type antennas
in general.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), 720 for a residual
rigid elongated unit not defining an electrical feature for
Class 343.
Subclass:
716
This subclass is indented under subclass 713. Subject matter
wherein the portion of the body supporting the antenna is the
running board.
Subclass:
717
This subclass is indented under subclass 711. Subject matter
wherein the antenna, when in operative position, is supported
under the vehicle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
713 for antennas supported by the body of a vehicle, as
distinguished from the subject matter in this subclass (717),
where the antennas are supported from other parts of the
vehicle than the body, generally the chassis. See (1) Note
under subclass 713, above.
716 for antennas supported under the running board of a
vehicle.
878 for antennas with a support.
Subclass:
718
This subclass is indented under subclass 700. Subject matter
wherein the antenna is shaped to fit the body or to be
supported by body, or including structure whereby the antenna
is secured to the body to be freely portable by the body
under operative conditions, or structure which enables the
body to operate as an antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
878 for antennas with a support.
906 for antennas with an electrical connector.
908 for antenna elements of a particular shape.
SEE OR SEARCH CLASS:
224, Package and Article Carriers, 5 for body or belt
attached package and article carriers.
455, Telecommunications, subclass 351 for portable radio
receivers.
607, Surgery: Light, Thermal, and Electrical Application,
149 for body attaching electrodes.
Subclass:
719
This subclass is indented under subclass 700. Subject matter
wherein the active portion of the antenna is claimed to be at
least partially buried under the ground or submerged in water
under operative conditions.
(1) Note. For classification in this subclass, the active
antenna must be at least partially buried under the ground or
submerged in water generally. Antennas having a liquid-filled
housing and liquid column antennas placed above ground are
not classified her, but in subclasses 700 and 872+
respectively.
SEE OR SEARCH THIS CLASS, SUBCLASS:
709 for water-borne antennas.
829 for fractional, multiple, or full wave linear type
antennas with grounding structure.
841 for antennas with electrical shields which may be used
underground or under water.
845 for antennas with a ground connection spaced from the
feed line connection.
846 for antennas with grounding structure, including
counterpoises.
872 for antennas with a housing or protective covering which
may be used underground or underwater.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 6 for earth
grounds for electrical apparatus generally, and subclasses
37+ for underground conductors.
Subclass:
720
This subclass is indented under subclass 700. Subject matter
wherein the antenna is combined with other devices or
structures having an added purpose or independent utility
other than to perfect the antenna, i.e., the other devices or
structures are not directly related to the primary function
of the antenna, which is the emission or collection of
electromagnetic wave energy together with the conveying of
such energy to or from the transmitter or receiver leadin.
(1) Note. This subclass receives subject matter such as an
antenna combined with a lamp, building structure, umbrella,
etc.., if more than a mere support. Antenna perfections or
improvements are classified elsewhere in the antenna
subclasses, subclasses 904+ being the residual home for such
perfections or improvements.
(2) Note. Combinations of antennas and other devices or
structures wherein such other devices or structures are
claimed in broad terms merely for such purposes as background
for the antenna or supporting the antenna are not classified
here, but in the appropriate antenna perfecting subclass.
For example, classification is in subclasses 878+ if the
other device is a support.
(3) Note. Generally where the antenna, within the subclass
definition, itself is designed to function also as another
device, as for example, a venetian blind or water sprinkler,
classification is in this subclass.
(4) Note. Generally where antenna details are claimed
together with other device or structure broadly or
specifically, classification is here, especially where the
other device is mechanical in nature as opposed to
electrical. When such device or structure is an element or
component radio apparatus, classification may be in the
appropriate subclass in Class 455. For example, subject
matter involving an antenna and a loud speaker or an antenna
and a power supply for a radio apparatus would be classified
in Class 455.
(5) Note. Generally where the antenna is claimed broadly
and the other device or structure is claimed specifically,
classification is with such other device or structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
705 for antennas combined with a device traveling or
suspended in the air.
709 for water-borne antennas.
711 for antennas combined with vehicle structure.
904 for antennas combined with perfecting structure, not
classified elsewhere. See also (1) Note, above.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclass
34 for electric lamp and discharge devices and systems
combined with antennas.
455, Telecommunications, 344 for radio receivers combined
with diverse type art device.
Subclass:
721
This subclass is indented under subclass 720. Subject matter
wherein the diverse type art device is a light.
(1) Note. Where the light is a signal or indicator to
provide an indication of the condition of the antenna such as
direction, classification is in subclass 760 or 894, below.
(2) Note. Antenna subject matter together with structure
energizing a light is classified herein even though the light
itself is not claimed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
760 for antennas with means for moving the antenna for
sweeping, scanning or orienting including signals, indicators
or alarms. See also (1) Note, above.
894 for antennas in general with a signal, indicator or
alarm. See also (1) Note, above.
SEE OR SEARCH CLASS:
340, Communications: Electrical, subclass 28 for
obstruction lights to warn aircraft, and subclasses 907+ and
468+ for traffic and vehicle signal light systems and signal
lights, respectively.
362, Illumination, appropriate subclasses for illuminating
devices.
Subclass:
722
This subclass is indented under subclass 700. Subject matter
wherein an active antenna includes an elongated portion
having lumped inductance and capacity in series or shunt with
the active portion remote from the lead-in terminals to pass
a particular frequency or band of frequencies and to block
another frequency or band of frequencies.
(1) Note. In this subclass the lumped inductance and
capacity usually act as an impedance in effect terminating
the active antenna at its point of connection for a
particular frequency, or they may cause the active antenna to
resonate at a plurality of different frequencies.
(2) Note. For Classification in this subclass, the
inductance and capacity must be lumped. Antennas having
distributed inductance and capacity in series or shunt with
the active portion remote from the lead-in connection to pass
a particular frequency or band of frequencies and to block
another frequency or band of frequencies are not classified
in this subclass, but in subclasses 802 and 828 below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723 for single adjustable length electrically long linear
antennas.
729 for plural diverse type antennas using the same active
element.
744 for high frequency loop type antennas with series
reactance in the loop.
745 for antennas with variable reactance for tuning the
antenna.
749 for antennas with lumped reactance for loading the
antenna.
802 for balanced doublet antennas with distributed reactance
added to the arms.
828 for fractional, multiple or full wave length linear type
antennas with a non-uniformity in the antenna.
850 for antennas in general with a coupling network or
impedance in the leadin which may include filters in the
coupling network.
SEE OR SEARCH CLASS:
333, Wave Transmission lines and Networks, 167 for wave
filters, per se.
Subclass:
723
This subclass is indented under subclass 700. Subject matter
wherein the antenna is a single end fed elongated linear mass
of appreciable electrical length, and is physically
adjustable in its length, usually for tuning the antenna.
(1) Note. A lattice type tower may be classified here, if
it is the electrical equivalent of a single end fed elongated
linear mass, and the other limitations of the definition are
met.
(2) Note. For classification herein the resonant length of
the linear antenna or some indication of appreciable
electrical length together with adjustability must be
claimed, as for example "adjustable in length for tuning"
(see subclasses 825+ where a particular wave length is
claimed but the adjustable feature is not claimed). Subject
matter involving adjustable length linear antennas which are
not of appreciable wave length, is not classified herein.
For example, adjustable length rod type antennas are
classified in subclasses 900+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
745 for antennas with a variable reactance separate and
distinct from the antenna for tuning.
750 for antennas for appreciable electrical length with
adjustable reactance for loading.
823 for balance doublet antennas with adjustable length.
825 for fractional, multiple or full wave length linear type
antennas.
874 for mast or tower type antennas.
900 for rod type antennas which may be adjustable in
length.
Subclass:
724
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is constructed so that it may be
changed into a different species of active antenna as, for
example, by switching means connecting the active portion or
portions in a different arrangement to the source or load or
by adding to or removing part of the radiating or collecting
element.
(1) Note. For classification in this subclass the
converting structure must produce a different active antenna
having significantly different physical or electrical
characteristics as opposed, for example, to adding sections
to or adjusting the antenna to change its physical or
electrical length, or adding or removing auxiliary structure
(e.g., reflector).
(2) Note. In this subject matter the different antennas are
not in physical existence at the same time, but exist
alternately, as opposed to the subject matter of subclasses
729+ wherein plural diverse antenna exist simultaneously.
Yet here, as in subclasses 729+, the different antennas
employ a common active portion.
(3) Note. For classification here, the change may be from
one type of active antenna to another such as from a
center-fed balanced doublet to a capacity type antenna or
from a loop to a trailing wire antenna; or the change may be
from one species of antenna to another within a type, such as
from a folded dipole to a simple rod dipole.
(4) Note. The rules recited under subclass 725 for
determining when antennas are of different type are not
applicable here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
725 for plural separate diverse type antennas. See (4)
Note, above.
729 for plural diverse type active antennas using the same
active element. See also (2) Note, above.
794 for diverse type balanced center-fed doublet antennas.
832 for an active antenna which is also a reflector.
850 for active antennas with a coupling network or impedance
in the leadin, and particularly subclass 859 for balanced to
unbalanced coupling.
876 for antennas with switching means between the antennas
and lines.
904 for antennas with a switch.
Subclass:
725
This subclass is indented under subclass 700. Subject matter
including two antennas each of different type, whose active
radio wave radiating or collecting elements are physically
separate and distinct.
(1) Note. When the antennas are, per se, classifiable in
different coordinate subclasses directly indented under
subclass 700, which provide for different types of antennas
such as subclasses 767, 772, and 793, the antennas are deemed
"of different type" as used in the above definition. If the
antennas are, per se, classifiable in different indented
subclasses of one of these coordinate subclasses as here
established, they are not classified in this subclass (725),
but in the coordinate subclass or the appropriate indented
subclass thereunder. For example, a plurality of diverse
type doublets would be classified in subclass 794, and a
plurality of diverse wave guide type antennas, neither being
of the bi-conical horn type, would be classified in
subclasses 776+. Antennas falling in different coordinate
subclasses directly indented under subclass 700 which
subclasses are directed to combinations, are not necessarily
of different types. The different types of antennas as the
term is here used are established by distinctions in the
active portions of the antennas, as opposed to distinctions
arising from combining the active antennas with auxiliary
structure, such as reflectors, coupling networks, and
supports.
(2) Note. The term "physically separate and distinct"
requires that the radiating or collecting elements of each
antenna be a complete entity, and not share in whole or in
part a common radiating or collecting portion. Such subject
matter where the collecting or radiating portions are so
shared are classified in subclasses 729+, below. However, the
sharing of a common support or coupling, or the utilization
by one antenna as a coupling element or support for the
radiating or collecting element of the other antennas does
not preclude classification in this subclasses (725+).
(3) Note. For classification in this subclass, there must
be a plurality of antennas. A single antenna composed of
structurally different active parts is not here classified.
For example, a sleeve type antenna with a rod coaxial with
the sleeve the rod and sleeve being connected to opposite
terminals of the same line, does not constitute a plurality
of antennas, and is classified in subclass 791, below. If
each of a plurality of active elements is able to function
independently without any of the remaining elements, a
plurality of antennas by be present. Separate terminals or
lead-in lines particularly with the transmission of a
plurality of signals, is also indicative of a plurality of
antennas. It may be noted that the utilization of one antenna
by another as its feed does not preclude the antennas being
considered plural.
SEE OR SEARCH THIS CLASS, SUBCLASS:
720 for an antenna combined with a diverse type art device.
724 for an antenna convertible to an antenna of a different
type.
729 for plural diverse type active antennas having a common
radiating or collecting portion. See (2) Note, above.
758 for plural antennas relatively movable for scanning,
sweeping or orienting.
770 for plural slot type antennas.
776 for plural wave guide type antennas.
794 for diverse type balanced doublet antennas.
796 797+, 799+, and 810+, for plural balanced doublets.
824 for a planar array of linear antennas.
826 for plural, fractional, multiple or full wave linear
type antennas.
835 for plural active antennas with a reflector.
844 for plural antennas spaced a fractional or full wave
length apart.
852 for plural antennas with impedance matching.
853 for plural antennas with a coupling network or impedance
in the leadin.
867 for plural loop type antennas.
879 for plural separate antennas with supports.
893 and the Search Notes thereunder for plural antennas in
general.
904 for antennas combined with other perfecting structure
not elsewhere provided for.
Subclass:
726
This subclass is indented under subclass 725. Subject matter
wherein one of the diverse type antennas is of the loop type
and one other of the diverse type antennas is of the
center-fed balanced doublet type, as defined in subclasses
741, 793, and 866, below.
(1) Note. For the field of search relating to this subject
matter see the search notes under subclasses 727 and 728
immediately below.
Subclass:
727
This subclass is indented under subclass 725. Subject matter
wherein one of the diverse type antennas is of the center-fed
balanced doublet type as defined in subclass 793, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
793 for center-fed balanced doublet type antennas in
general, and arrays of such doublet antennas.
Subclass:
728
This subclass is indented under subclass 725. Subject matter
wherein one of the diverse type antennas is of the loop type
as defined in subclasses 741 and 866 below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
732 for circular loop type traveling wave antennas.
741 for high frequency loop type antennas.
764 for loop type antennas with means for scanning, sweeping
or orienting.
788 for loop type antennas including magnetic material.
842 for loop type antennas with electrical shielding.
855 for plural loop type antennas with coupling.
866 for loop type antennas in general.
SEE OR SEARCH CLASS:
336, Inductor Devices, for inductor devices.
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigation), 350 and particularly
subclasses 417+ for directive resistant energy communication
systems which may include diverse type antenna one of which
may be a loop type antenna.
Subclass:
729
This subclass is indented under subclass 700. Subject matter
including two antennas each of different type, whose active
radio wave radiating or collecting elements are at least
partly in common.
(1) Note. For a construction of the term "of different
type" see (1) Note under subclass 725 above.
(2) Note. The term "active radio wave radiating or
collecting elements" does not include reflector structure,
coupling structure, or support structure. When such
structures are involved, classification is in subclasses 725+
above, if the antennas are of different type.
(3) Note. For classification in this subclass, there must
be a plurality of antennas. A single antenna composed of
structurally different active parts is not here classified.
For example, a sleeve type antenna with a rod coaxial with
the sleeve, the rod and sleeve being connected to opposite
terminals of the same line, does not constitute a plurality
of antennas, and is classified in subclass 791, below. If
each of a plurality of active elements with the common
portion is able to function independently in its usual manner
without the other a plurality of antennas may be present.
Separate terminals or lead-in lines particularly with the
transmission of a plurality of signals, is also indicative of
a plurality of antennas. It may be noted that the
utilization of one antenna by another as its feed does not
preclude classification here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
725 and the search notes thereunder, for plural separate
diverse type antennas and for subject matter pertinent to
plural diverse type antennas, respectively.
791 for a single antenna composed of a sleeve and a rod.
See also (3) Note, above.
Subclass:
730
This subclass is indented under subclass 729. Subject matter
wherein one of the antennas is of the balanced doublet type
as classified in subclass 793, below.
(1) Note. Usually the patents in this subclass involve a
dipole with a balanced coupling to a source or load together
with an unbalanced coupling which connects this same dipole
structure as a T antenna or a rod type antenna to the same or
different source or load.
SEE OR SEARCH THIS CLASS, SUBCLASS:
794 for plural diverse type balanced doublets. See (1) Note
under subclass 729.
816 for plural balanced doublets with coupling.
853 for plural antennas with coupling networks.
859 for antennas with balanced to unbalanced coupling.
865 for balanced antennas with a balanced coupling network.
Subclass:
731
This subclass is indented under subclass 700. Subject matter
wherein an elongated conducting mass of appreciable
electrical length with respect to the wave length of the
signal energy (usually greater than a half-wave length) is
coupled to free space continuously along its length to
transmit signal energy between the mass and free space along
its length; the mass being inherently adapted to, or being
arranged to, or including structure to give the mass a delay
or acceleration characteristic in the direction of
propagation of the radio wave in space to which the mass is
coupled so that the wave of electric energy conducted along
the mass remains in phase with the associated radio wave
moving in space.
(1) Note. In receiving, the interaction between the wave
propagated along the elongated conductive mass and the wave
in space coupled to the mass results in a traveling wave
progressively increasing in magnitude along the length of the
path of the propagated wave, due to the reinforcing of the
in-phase space wave collected along the antenna as the
collected wave travels towards the receiving means. The mere
conduction of wave energy along its length as in a wave guide
type antenna of subclass 772 is not sufficient for
classification here. The wave energy must progress in phase
with the space wave to secure the reinforcing of the wave
energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
739 for antennas having resistance electrically remote from
the coupling to a source or load for such purposes as the
prevention of reflected waves.
811 for fishbone type arrays of center-fed balanced doublet
type antennas.
845 for antennas with a ground connection spaced from the
feed line connection.
Subclass:
732
This subclass is indented under subclass 731. Subject matter
wherein the elongated conducting mass forms substantially a
circle in a single plane.
(1) Note. Helical traveling wave type antennas are not
classified in this subclass since any single loop turn does
not lie in a single plane, but are classified in subclass 731
above. A plurality of traveling wave type antennas whose
respective active portions are arranged end to end to form a
circle are not classified herein but in subclass 737, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
741 for high frequency type loops which do not operate on
the traveling wave principle.
866 for loop type antennas in general which do not operate
on the traveling wave principle.
Subclass:
733
This subclass is indented under subclass 731. Subject matter
wherein the elongated conducting mass is formed in two
co-extensive portions, each portion being connected at the
corresponding end to a lead-in terminal, the portions
diverging and then converging to form a diamond or rhombus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
734 for rhombic type traveling wave antennas with feedback.
735 for balanced V type traveling wave antennas having the
configuration of part of a rhombic wave antenna.
736 for inverted V type traveling wave antennas having the
configuration of part of a rhombic wave antenna.
741 for high frequency type loops.
806 for zigzag type balanced doublets.
866 for loop type antennas in general.
Subclass:
734
This subclass is indented under subclass 733. Subject matter
including a circuit extending from the end of the conducting
mass opposite the lead-in terminals around the mass to the
antenna leadin or to associated circuitry for conveying, for
example, the nonradicated energy back to the antenna input.
Subclass:
735
This subclass is indented under subclass 731. Subject matter
wherein the conducting mass is composed of two diverging
portions, each portion connected at the apex to a transmitter
or receiver in a balanced manner.
(1) Note. The subject matter of this subclass resembles in
structure doublets with the arms nonlinearly arranged as
classified in subclass 809, below. However, in this subclass
(735) the standing waves are suppressed, as opposed to the
utilization of such waves in subclass 809, below.
(2) Note. In this subclass the antenna is fed in a balanced
manner at the apex of the V, while in subclass 736 the
antenna is fed in an unbalanced manner at the free end of the
V.
SEE OR SEARCH THIS CLASS, SUBCLASS:
733 for rhombic type wave antennas which may include a V
type wave antenna as a part thereof.
736 for inverted V type traveling wave antennas. See also
(2) Note, above.
805 808 and 809, for center-fed balanced doublets involving a
V configuration. See also (1) Note, above.
Subclass:
736
This subclass is indented under subclass 731. Subject matter
wherein the conducting mass is formed as a V, and lying
usually in a substantially vertical plane with the apex of
the V uppermost, and one end of the mass being connected to
an unbalanced lead-in terminal.
(1) Note. In this subclass the antenna is fed in unbalanced
manner at the free end of the V, while in subclass 735 above
the antenna is fed in a balanced manner at the apex of the
V.
(2) Note. The antennas of this subclass may include a
tilt-type antenna as an element thereof. Such tilt-type
antennas are classified in subclass 731 above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
733 for rhombic traveling wave type antennas.
735 for balanced V traveling wave type antennas. See (1)
Note, above.
806 for zigzag type balanced doublet antennas.
824 for planar arrays of linear antennas. 826, for plural
fractional, multiple or full wave linear type antennas. 859,
for antennas with balanced to unbalanced coupling networks in
the leadin.
Subclass:
737
This subclass is indented under subclass 731. At least two
antennas, each above, which are independently operable.
(1) Note. Two wires with a reflection transformer at the
end remote from the coupling are not deemed plural within the
definition, since each wire requires the cooperation of the
other for the antenna to operate in its intended manner.
Such subject matter is classified in subclass 738 below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
844 for plural antennas spaced a fractional or full wave
length apart.
853 for plural antennas in general with a coupling network
or impedance in the leadin.
893 for plural antennas in general. See also the search
notes thereunder for a field of search for plural antennas
generally.
Subclass:
738
This subclass is indented under subclass 731. Subject matter
wherein the conducting mass is composed of two adjacent
coextensive wires with a termination at the end opposite the
coupling end, a signal wave which is picked up by the wires
and which is conducted along the wires to the termination
being returned over the wires in phase opposition in the
respective wires, i.e., the wires are effective as a balanced
line for this returned energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
737 for plural traveling wave type antennas in general which
may include one or more two-wire antennas with reflection
transformers of the type defined above.
Subclass:
739
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with a resistance at
the end electrically remote from the lead-in terminal to the
transmitter or receiver, the resistance being connected to
form a closed electric loop across the transmitter or
receiver.
(1) Note. In this subclass the essential purpose is usually
to render the antenna a periodic. The resistance in this
subclass (739) is usually equal to the characteristic
impedance of the active antenna. The antennas of this
subclass may involve traveling waves, but these waves are
usually combined only to be effective as standing waves. The
antennas in this subclass are generally of the "broadside"
type (i.e., the resulting radiation pattern lies in a
generally perpendicular axis to that of the active antenna
element) whereas the traveling wave type antennas of subclass
731 are generally of the "end-fire" type, i.e., the radiation
pattern established by the active antenna element lies along
the same axis as the active antenna element.
(2) Note. The loop may be formed through ground.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731 for traveling wave type antennas terminated at the end
remote from the antenna leadin in a resistance. See also (1)
Note, above.
845 for antennas with a ground connection spaced from
feedline connection.
Subclass:
740
This subclass is indented under subclass 739. Subject matter
wherein the active antenna includes the return circuit as an
active portion thereof, thus forming two similar active
portions, which are connected respectively to balanced
lead-in terminals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
733 for rhombic type traveling wave antennas.
735 for balanced V type traveling wave antennas.
741 for high frequency type loops.
792 for sleeve type antennas arranged as doublets.
793 for balanced doublets, and particularly subclass 803 for
folded dipoles.
842 for loop type antennas with shields.
850 and particularly subclasses 859 and 865, for coupling
networks involving balanced circuits.
866 for loop type antennas in general.
Subclass:
741
This subclass is indented under subclass 700. Subject matter
wherein a current path of appreciable electrical length is
arranged as a substantially closed active loop having an
appreciable electrical dimension between all opposing points
on the loop together with structure or proportions to
maintain a desired current distribution around the loop.
(1) Note. The desired current distribution usually involves
a particular position of the standing wave pattern along the
current path, or the instantaneous current effectively
flowing in one direction along the current path. The purpose
of this is usually to maintain an omnidirectional pattern in
one plane.
SEE OR SEARCH THIS CLASS, SUBCLASS:
726 and 728, for plural separate diverse type antennas
including a loop type antenna.
732 and 733+, for circular loop and rhombic traveling wave
antennas respectively.
748 for loop type antennas with variable reactance for
tuning.
764 for loop type antennas with means for moving the loop
for scanning, sweeping or orienting.
788 for loop type antennas including magnetic material.
842 for loop type antennas with electrical shields.
855 for plural loop type antennas with a coupling network or
impedance in the leadin.
866 for loop type antennas in general.
Subclass:
742
This subclass is indented under subclass 741. Subject matter
including two or more loops, each as defined in subclass 741
above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
800 for plural groups of circumferentially arranged
doublets.
855 for plural loop type antennas with a coupling network or
impedance in the leadin.
867 for plural loops in general.
Subclass:
743
This subclass is indented under subclass 741. Subject matter
wherein the antenna feed line is connected at two or more
spaced points along the perimeter of the closed loop.
SEE OR SEARCH THIS CLASS, SUBCLASS:
732 for traveling wave type antennas of circular loop
configuration which may be coupled at spaced points.
799 for plural center-fed balanced doublet type antennas
circumferentially arranged.
857 for antennas with the coupling at spaced points.
Subclass:
744
This subclass is indented under subclass 741. Subject matter
wherein the closed loop includes inductance or capacity in
series around the current path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
722 for antennas with lumped reactance filters therein.
732 for traveling wave type antennas arranged in a circular
loop which may have inductance or capacity in the active
antenna.
743 wherein the series inductance or capacity is included in
the current path, and the feed coupling is at spaced points
on the loop.
748 for loop type antennas with variable reactance for
tuning the antenna.
749 for antennas with lumped reactance for loading.
788 for loop type antennas including magnetic material.
842 for loop type antennas with electrical shields.
Subclass:
745
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with an adjustable
inductance or capacity, distinct and separate from the active
antenna, the inductance or capacity providing a reactance
which combines with the inherent reactance of the active
antenna to establish a resonance in a circuit including the
antenna, this resonance being at a frequency other than the
natural electrical resonant frequency of the antenna,
adjustment of the inductance or capacity changing this
resonance.
(1) Note. The inherent reactance includes not only the
distributed reactance of the active antenna but also the
natural reactance of the antenna due to its location and
surroundings, as for example, the capacity relation inherent
in the position of the active antenna relative to ground.
(2) Note. Loading under subclass 749 is always combined
with an active antenna of an appreciable electrical length,
while such an appreciable length is not necessary for
classification in this subclass (745). The reactance
combined with the active antenna under loading (subclass 749)
must be located within the active antenna, at its free end,
or immediately contiguous the end of the active antenna
closest to the leadin, whereas the adjustable reactance under
this subclass (745) is located outside or external to the
active antenna.
(3) Note. Adjustable reactance networks which do not tune
the inherent reactance of the antenna are not classified
here, but will be found in subclasses 850+, especially
subclass 861 where adjustable impedance matching networks are
involved.
(4) Note. Antennas combined with tuning networks are
classified herein, except where in addition significant
transmitter or receiver structure is claimed. For
classification of such latter combinations, see Class 455,
appropriate subclasses.
(5) Note. Where an adjustable reactance is combined with an
active antenna but the combination is for changing the width
of the resonant band, classification is not herein but in
subclasses 850+ below. For classification herein adjustment
of the reactance in such combinations must be for tuning,
that is, changing the resonant frequency of the active
antenna circuit.
(6) Note. The variable reactance may be located at the
coupling end of the antenna, or at the end remote from the
coupling end to connect the antenna to ground. In the latter
case, if the reactance is not adjustable, classification is
in subclass 845. See also subclass 750 below for antennas
having adjustable reactance intermediate its ends for
loading.
SEE OR SEARCH THIS CLASS, SUBCLASS:
722 for antenna having lumped reactance electrical filters
between sections of the active antenna.
723 for single electrically long end-fed antennas which are
adjustable in length for tuning.
731 for traveling wave type antennas which may have phasing
reactances within the active antenna.
739 for active antennas having a terminating resistance at
the open end.
744 for high frequency type loops having series reactance in
the loop.
749 for antennas having lumped reactance for loading. See
also (2) Note above.
850 for antennas in general with a coupling network or
impedance in the leadin which may include adjustable
reactances, and particularly subclass 861 for such antennas
having an adjustable impedance matching network. See also (3)
Note, above.
913 for reflectors or directors combined with an impedance
which may have an adjustable reactance for tuning the
reflector or director.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, particularly 167
for wave filters, and subclasses 219+ for resonators of the
distributed parameter type.
334, Tuners, appropriate subclasses for tuned networks for
use in radiant energy apparatus and comprising inductance and
capacitance elements in circuit arrangement to form a
resonant circuit and in which structure is provided for
adjusting one or both of these elements for changing the mean
resonant frequency of the circuit.
336, Inductor Devices, particularly 130 and 137+ for
variable inductor devices which may be used in adjustable
reactance circuits for tuning active antennas.
361, Electricity: Electrical Systems and Devices, 287 for
variable capacitors which may be used in tuning circuits.
455, Telecommunications, 150.1 for receivers which may
involve tuning.
Subclass:
746
This subclass is indented under subclass 745. Subject matter
wherein the active antenna is of the slot type as defined in
subclass 767 below.
(1) Note. For classification in this subclass the slot type
antennas must have an adjustable reactance separate and
distinct from the slot itself. Slot type antennas having a
slidable short-circuiting bar across the slot remote from the
feed line connection, for example, which defines the length
of the slot and whereby the length of the slot may be
adjusted for tuning are not classified in this subclass, but
in subclasses 767+, below.
Subclass:
747
This subclass is indented under subclass 745. Subject matter
wherein the active antenna is of the center-fed balanced
doublet type as defined in subclass 793 below.
(1) Note. For classification in this subclass the variable
reactance for tuning must be separate and distinct from the
balanced doublet antenna. For example, balanced doublet
antennas having an adjustable length whereby the inherent
reactance of the antennas may be varied for tuning are
classified in subclass 823, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
814 816 and 820+, for balanced doublet type antennas with
coupling networks which may include adjustable reactance
elements.
823 for balanced doublet type antennas whose length is for
tuning. See also (1) Note, above.
Subclass:
748
This subclass is indented under subclass 745. Subject matter
wherein the active antenna is of the loop type as defined in
subclass 866, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
732 for traveling wave type circular loop antennas which may
have phasing reactance within the loop.
744 for high frequency type loop antennas having series
reactance within the loop.
855 for plural loop antennas with a coupling network or
impedance in the leadin which may include variable
reactance.
866 for loop type antennas in general.
Subclass:
749
This subclass is indented under subclass 700. Subject matter
wherein a resonant active antenna includes an elongated
portion of appreciable electrical length having lumped
inductance or capacity directly in series or shunt with the
elongated portion (to modify the standing wave pattern
existing along the portion, or to change the effective
electrical length of the portion).
(1) Note. The lumped inductance or capacity must be
intermediate the ends, at a free end or immediately at the
leadin end of the active antenna for classification herein.
Combinations of an active antenna with such inductances or
capacitances located in a position remote or separate from
the antenna are classified below in subclasses 850+, or where
adjustable for tuning the antenna in subclasses 745+, above.
In the special case where an adjustable lumped inductance or
capacity is located immediately at the leadin end of the
active antenna and tunes as well as loads the antenna,
classification is in subclass 745 and the subject matter is
cross-referenced herein.
(2) Note. For classification herein the inductance or
capacitance must be of the lumped type. Where there is
included a nonuniformity or other distributed parameter
inductance or capacitance, such as a capacity hat
classification is not herein, but in subclass 802 for
center-fed balance doublets with distributed reactance added
to the arms, or in subclass 828 for fractional multiple or
full wave type antennas with a nonuniformity for reactive
effect, or in subclass 899 for antennas with area increasing
means generally.
SEE OR SEARCH THIS CLASS, SUBCLASS:
722 for antennas having a lumped reactance electrical filter
located between active sections thereof.
723 for single electrically long linear type antennas
adjustable in length for tuning.
731 and 739+, for traveling wave type antennas and antennas
combined with terminating resistances at the remote ends
thereof respectively, which may have lumped inductances or
capacitances in the active portions thereof.
741 for high frequency loop type antennas which may have
lumped inductance or capacitance in the active portions
thereof.
745 for antennas with variable reactance for tuning.
802 for center-fed balanced doublet antennas with
distributed reactance added to the arms thereof. See also
(2) Note, above.
806 for center-fed balanced doublet type antennas with bent
arms which may modify the inherent inductance or capacitance
otherwise present with consequent loading.
807 for center-fed balanced doublet antennas with tapered,
thick or enlarged arms which modify the inherent capacities
of the antennas.
823 for center-fed balanced doublet type antennas whose
length is adjustable.
828 for fractional, multiple, or full wave linear type
antennas with a nonuniformity for reactive effect such as a
capacity top. See also (2) Note, above.
850 for antennas with coupling in general. See also the
search notes thereunder for special types of antennas with
coupling.
899 for antennas having area increasing means, such as
spiniferous or with a metal ball on top of the antennas. See
also (2) Note, above.
SEE OR SEARCH CLASS:
178, Telegraphy, 45 for loaded transmission lines.
Subclass:
750
This subclass is indented under subclass 749. Subject matter
wherein the lumped inductance or capacity is adjustable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
745 for antennas with variable reactance for tuning the
antennas.
Subclass:
751
This subclass is indented under subclass 749. Subject matter
including at least two antennas as defined therein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
893 and the search notes thereunder for plural antennas in
general.
Subclass:
752
This subclass is indented under subclass 749. Subject matter
wherein the lumped inductance or capacity is connected at the
free end of the active antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
802 for center-fed balanced doublets with distributed
reactance added to the arms and which may be at the free
ends.
828 for fractional, multiple or full wave linear type
antennas with a nonuniformity therein, which may be at the
free end of the antenna.
899 for antennas with area increasing means generally which
may be at the free end.
Subclass:
753
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with structure spaced
from or external to the active antenna which transmits waves
going to or from the active antenna, and is shaped or
positioned to delay or accelerate transmitted waves an amount
which varies over the wave front, to alter the direction or
propagation of the waves emitted from the structure with
respect to the waves impinging on the structure, or to bring
the wave to a focus, or to alter the wave front (such as to
convert a spherical wave front to a planar wave front or vice
versa).
(1) Note. The structure referred to above may be contiguous
to a reflecting plate or may form with the surrounding fluid
(as air) a reflecting surface (by reason of the different
dielectric constants of the structure material and air) so
that the impinging waves pass through the wave modifying
structure twice, once on the way to the reflecting surface
and then returning therefrom, in going to or from the active
antenna, thus forming a reflecting lens. This subject matter
is classified in indented subclass 755.
(2) Note. In the case of directors which are constructed of
somewhat smaller dimensions than the resonant active antenna
with which they have a parasitic relationship, so that the
phase retardation at the ends or edges of the director
sharpens the beam resulting in a type of "focusing" action,
the impinging electromagnetic wave cannot be said actually to
pass therethrough; and antennas with such directors are
therefore not classified herein but in subclasses 815, 817,
819, and 833.
(3) Note. When the active antenna is a wave type guide
horn, the term "spaced" means physically removed externally
from the mouth of the horn. A lens at the mouth of the horn
and forming a closure for this mouth is not deemed "spaced"
as here used, but is classified in subclass 783 below. The
term "external" means on the outside of the active antenna.
(4) Note. An active antenna with a so-called diffractor,
which produces an interference pattern is classified here, if
the diffractor transmits electromagnetic wave energy. If the
diffractor is opaque to such energy, classification is on
other characteristics, such as in subclass 833 if the
director function is performed and in subclasses 834+ if the
reflector function is performed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
756 for antennas with polarization filters or converters.
783 for wave guide type antennas having internal wave
refraction means.
784 for wave guide type antennas with closures.
785 for wave guide type antennas composed of dielectric
rods, e.g., polystyrene rods.
872 for antennas having a housing or protective covering
which may be of material having refracting properties.
909 for refracting means and radiant energy filters, per
se.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, particularly 245
for transmission line elements and components which may be
refractors in a transmission line.
359, Optics: Systems (Including Communication) and Elements,
642 for optical lenses.
362, Illumination, 326 for illumination type refractors.
Subclass:
754
This subclass is indented under subclass 753. Subject matter
wherein structure is included which permits or effects
scanning, sweeping, or orienting of the antenna beam.
(1) Note. See (4) Note under subclass 757 for the
significance of the terms "scanning", "sweeping" or
"orienting".
(2) Note. Usually the scanning, sweeping or orienting is
obtained by relative motion between the active antenna and
the refractor, or by controlling the coupling of the active
antennas associated with the refractor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 and 100+, for reflected and/or otherwise returned wave
systems and directive radiant energy systems, respectively,
which may involve a spaced external wave refractor and means
for scanning, sweeping or orienting.
757 for antennas having means for moving the antennas for
scanning, sweeping or orienting.
768 for slot type antennas with periodic control of the slot
or coupling which may involve scanning, sweeping or
orienting.
777 for plural wave guide type antennas with control of the
individual antenna.
780 for pillbox type antennas which may be adapted for
scanning, sweeping or orienting.
839 for antennas wherein the reflector and active antenna
are relatively movable.
854 for antennas in general with an adjustable coupling
network.
Subclass:
755
This subclass is indented under subclass 753. Subject matter
including a reflector, or wherein the refractor is also
adapted to perform a reflecting function.
(1) Note. For definitions of a reflector per se and
associated with an active antenna, see subclasses 912 and
834, respectively.
(2) Note. The reflector may be spaced from the refractor or
may be contiguous with the refractor to form a backer for the
refractor. Further, the refractor may inherently reflect the
impinging radio waves at a surface opposite to that where the
waves impinge, due to differences which may exist in the
refractor material and that of the contiguous or surrounding
material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
775 779, 780, and 781+, for wave guide type antennas with
reflectors.
815 817 and 818+, for center-fed balanced doublets with
reflectors.
832 for an active antenna as a reflector.
834 for antennas in general with parasitic reflectors.
909 for refracting means, per se, together with a
reflector.
912 for reflectors, per se, and for definition of a
reflector.
SEE OR SEARCH CLASS:
362, Illumination, 327 for combined illumination reflectors
and refractors.
Subclass:
756
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with structure which
acts directly on the radio wave to filter out wave energy of
an undesired polarization or to modify the polarization
pattern of the wave.
(1) Note. The polarizing structure is usually a series of
parallel rods (polarization grating) through which the waves
pass or from which impinging waves are reflected. The
polarizing structure may be spaced from or within the
antenna, such as, in the latter case, within a wave guide
horn or within a dielectric rod antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
753 for active antennas with spaced electromagnetic
refractors which may also include polarization modifying
means.
909 for refracting means and radio wave filters, per se,
including polarization modifying means.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, subclass 21 for
wave mode converters.
359, Optics: Systems (Including Communication) and Elements,
483 for optical polarizers.
362, Illumination, subclass 19 for illuminating means
combined with polarization means.
Subclass:
757
This subclass is indented under subclass 700. Subject matter
wherein the complete antenna is movably (e.g., pivoted or
rotatably) supported for motion as a unit or wherein the
reflector and antenna are supported to be relatively movable,
together with structure that effects or is peculiarly adapted
to effect motion of the antenna or relative motion between
the antenna and reflector in such fashion that the radiation
pattern is scanned, swept or oriented.
(1) Note. An adjustable support for an antenna or reflector
which permits an antenna beam to be scanned, swept or
oriented is classified in subclasses 880+ below. For
classification in this subclasses (757+), there must be some
structure which positively acts, or may be actuated to
produce this beam scanning, sweeping or orienting. Examples
of such structure are a motor, crank or handle, or a
mechanism connecting such motor, crank, or handle to an
antenna or reflector.
(2) Note. For classification in this subclass the entire
antenna must move on its support or there must be relative
motion between the antenna and reflector on their support or
supports. Mere motion of a part of the antenna, such as a
mechanical change in the relative position of antenna parts
in the coupling path for such purposes as switching or
changing the electrical characteristic of the radiated
energy, is not sufficient for classification here, but would
involve such subclasses as 854 and 876, below.
(3) Note. An adjustable support together with means for
effecting positive adjustment of the antenna for purposes
other than scanning, sweeping or orienting, such as raising
or lowering the antenna is not classified here, but in
subclasses 880+ below.
(4) Note. Sweeping an antenna beam usually involves moving
the antenna beam repeatedly along a single line (which may be
straight or curved) in space. Scanning such a beam usually
involves repeatedly moving the beam over an area in space.
Orienting usually involves mere change of the direction of
the antenna beam.
(5) Note. Where in addition to directional modification of
the beam means are claimed whereby a distinctive signal or
signals associated with the received radio wave energy and
indicating or denoting direction are involved, classification
is not in this subclass but in Class 342, subclasses 350+,
above.
(6) Note. For classification in this and indented subclass,
there must be recited in the claims antenna details relating
to the signal energy path, for example, details of the active
antenna or reflector such as dipole antenna, parabolic
reflector. The recitation of both an antenna and reflector
by name only in a claim is considered a recitation of details
of the radiant energy structure for classification in this
subclass. Recitation of an antenna by name only or a
reflector by name only in combination with means for moving
the antenna or reflector is not sufficient for classification
in this subclass but is classified in the appropriate class
taking the means for moving, such as Class 74, Machine
Element or Mechanism, for mechanical motions, Class 318,
Electricity: Motive Power Systems, for motor controls,
Classes 211, Supports: Racks, and 248, Supports, for
adjustable supports.
SEE OR SEARCH THIS CLASS, SUBCLASS:
754 for antennas with spaced or external radio wave
refractor, e.g., lens, with means for scanning, sweeping or
orienting.
768 for slot type antennas with periodic control of the slot
or coupling which may involve scanning, sweeping or
orienting.
777 for plural wave guide type antennas with control of the
individual antennas which may involve scanning, sweeping or
orienting.
816 for plural balanced doublets with a coupling network
wherein the coupling network may be controlled for scanning,
sweeping or orienting.
839 for antennas wherein the reflector and active antenna
are relatively movable.
854 for plural antennas with adjustable coupling networks
which may involve scanning, sweeping or orienting.
869 for loop type antennas with rotatable supports.
876 for antennas with switching between the antennas and
lines which may involve scanning, sweeping or orienting.
882 for antenna with pivoted or rotatable supports.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, particularly subclass 1
for mechanical movements for antennas. See also (6) Note,
above.
174, Electricity: Conductors and Insulators, subclass 86
for conduits, cables and conductors with angularly movable or
adjustable joints.
211, Supports: Racks, and 248, Supports, for supports which
permit movement of the article supported. See also (6) Note,
above.
318, Electricity: Motive Power Systems, for motor controls.
See also (6) Note, above.
333, Wave Transmission Lines and Networks, 245 for long line
elements and components which may include rotatable
couplings.
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar Radio Navigation), subclasses 1-205 and
subclasses 350+ for reflected or otherwise returned wave
system and directly radio wave energy systems, respectively,
which may involve means for moving a directive antenna.
362, Illumination, for illuminating means, particularly 37
for dirigible light supports.
Subclass:
758
This subclass is indented under subclass 757. Subject matter
combined with another relatively movable antenna, together
with structure that effects relative motion between the
complete antennas or between the active antenna portions or
the reflectors.
(1) Note. The plurality of antennas may have individual
reflectors or a common reflector.
SEE OR SEARCH THIS CLASS, SUBCLASS:
879 for plural antennas with a support therefor.
893 for plural antennas in general. See also the Search
Notes thereunder for a field of search pertinent to plural
antennas.
Subclass:
759
This subclass is indented under subclass 757. Subject matter
wherein the directive antenna is supported for movement of
the axis of its beam over a spiral path and wherein the means
for moving includes structure which causes the antenna to
move its beam axis cyclically over a spiral path.
(1) Note. If the means for moving is such that it only may
be manipulated to move the axis of the antenna over a spiral
path, as for example, an antenna mounted for azimuthal
rotation and nod together with a handle, classification is
not here, but in such subclasses as 761 or 765 below. For
classification in this subclass, the moving means must be
effective to maintain the antenna continuously repeating the
same spiral scanning movement.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 1 for complex
mechanical movements for moving an article, which may be an
antenna, for scanning or sweeping.
Subclass:
760
This subclass is indented under subclass 757. Subject matter
together with signal, alarm, or indicator structure which is
responsive to the scan, sweep or orientation of the antenna,
independent in its operation from the collected or radiated
signal.
(1) Note. For classification in this subclass the signal,
indicator or alarm structure must be claimed in combination
with the means for moving the directive antenna for scanning,
sweeping or orienting to indicate some function or result of
such motion of the antenna, as for example, direction of the
antenna or angle swept through by the antenna; as opposed to
subclass 894 where general signal indicator or alarm
structure combined with an antenna for indicating some
condition of the antenna is classified.
(2) Note. Where an indicator is claimed broadly in
combination with an antenna and means for moving such
antenna, although such indicator is disclosed as not only
showing a condition of the antenna, as the position of its
sweep or scan from point to point but also as showing some
condition in response to a received signal (as in a
cathode-ray tube, the location of a remote signal), such
subject matter is not classified in this subclass but as a
direction finding receiver under this Class 342, subclasses
417+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
703 for measuring the antenna signal energy.
894 for antennas with indicator, signal or alarm structure
in general. See also (1) Note, above.
SEE OR SEARCH CLASS:
116, Signals and Indicators, for mechanical signal, alarms
and indicators in general.
340, Communications: Electrical, for electrical signaling
devices in general.
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigation), subclasses 1-205 and
subclasses 350+ for reflected wave and directive, which may
involve antenna indicators. See also (2) Note above.
Subclass:
761
This subclass is indented under subclass 757. Subject matter
wherein the reflector and active antenna are supported to be
relatively movable, together with structure that effects or
is peculiarly adapted to effect relative motion between the
antenna and reflector element.
(1) Note. Usually the patents in this subclass involve a
parabolic reflector and active antenna in an unsymmetrical
relationship, which upon rotation produce conical scanning.
(2) Note. The term reflector as used in this subclass
includes any parasitic element such as a director.
SEE OR SEARCH THIS CLASS, SUBCLASS:
759 for active antennas and reflectors which may be
relatively movable to produce a spiral scan.
839 for antennas with reflectors which are relatively
movable for purposes other than scanning sweeping or
orienting, such as focusing or changing the beam pattern; or
where no means is claimed for moving the antenna and
reflector relatively for scanning, sweeping or orienting.
Subclass:
762
This subclass is indented under subclass 757. Subject matter
wherein the active antenna is of the wave guide type as
defined in subclass 772 below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
759 for antennas of the wave guide type together with means
for moving the antenna or the reflector in a spiral path.
761 for antennas of the wave guide type having a reflector
together with means for moving the reflector and antenna
relative to each other.
772 for wave guide type antennas, per se.
Subclass:
763
This subclass is indented under subclass 757. Subject matter
wherein the antenna is rotatably supported together with
structure for imparting continuous or oscillating angular
motion to the complete antenna as a unit relative to its
support.
(1) Note. When means for rotating the antenna is a hand
operated control level or linkage system and the antenna is
claimed by name only classification is elsewhere (see the
Search Class notes below); otherwise (when antenna details
are claimed), classification is herein.
(2) Note. For classification in this or indented subclasses
the claimed combination of the antenna and the means to
impart rotary motion thereto must include detailed antenna
structure as opposed to the mere recitation of an antenna or
reflector by name only. In the latter case classification is
with the type of combination claimed for imparting motion
(see the Search Class notes below).
SEE OR SEARCH THIS CLASS, SUBCLASS:
761 for antennas with means for moving the reflector and
antenna relative to each other.
869 for loop type antennas with a rotatable support.
882 for antennas with a pivoted or rotatable support.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, particularly subclass 1
and 491, for hand operated control lever and linkage systems.
See (1) and (2) Notes, above.
192, Clutches and Power-Stop Control, for clutches and power
stop controls. See (2) Note, above.
318, Electricity: Motive Power Systems, for motor control
systems wherein the motor may move an antenna.
Subclass:
764
This subclass is indented under subclass 763. Subject matter
wherein the rotatable antenna is of the loop type as defined
in subclass 866, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
866 and the search notes thereunder for loop type antennas,
per se, and particularly subclass 869 for such antennas with
rotatable supports.
Subclass:
765
This subclass is indented under subclass 763. Subject matter
wherein the antenna is supported for rotation in different
planes (i.e., rotatable about two or more angularly disposed
axes) together with structure for imparting continuous or
oscillating angular motion to the antenna as a unit in these
planes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
759 wherein the antenna may be rotated in different planes
to cover a spiral path.
Subclass:
766
This subclass is indented under subclass 763. Subject matter
wherein the means imparting motion to the antenna is a
motor.
(1) Note. The term motor as used above contemplates all
devices other than manual for imparting motion to the
antenna. The motor is usually electrical, but may be of
another type such as fluid. To be classified herein the
motor must be claimed as such, or as a means to rotate the
antenna, or some similar recitation. Subject matter
involving manual means to impart motion when combined with a
rotatable antenna for scanning, sweeping or orienting is not
classified herein but in subclass 763, above. As distinct
from a motor drive, a manual drive is usually structure such
as a handle, affording means to apply the manual force. In
this latter case where the antenna is claimed by name only
and involves, for example, a handle and mechanical motion
transmitting means, classification is in Class 74 and not
herein.
(2) Note. For classification in this subclass the claimed
combination of the motor and antennas must include detailed
antenna structure as opposed to the mere recitation of the
antenna or reflector by name only. In the latter case,
classification is with the motor if the motor is claimed in
detail. For example, subject matter involving a combination
of an electric motor for rotating an antenna for scanning,
sweeping or orienting, motor control, and antenna, where the
antenna is claimed by name only, is not classified herein.
The Search Class section below contains a list of the classes
involving motors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
765 where one or more motors may be used to effect rotary
motion of the antenna in different planes.
SEE OR SEARCH CLASS:
60, Power Plants (see (2) Note above)
91, Motors: Expansible Chamber Type; (see (2) Note above)
123, Internal-Combustion Engines; (see (2) Note above)
170, Motors, Fluid Current; (see (2) Note above)
185, Motors: Spring, Weight, or Animal Powered; (see (2)
Note above)
253, Motors, Fluid; (see (2) Note above)
290, Prime-Mover Dynamo Plants; (see (2) Note above)
310, Electrical Generator or Motor Structure; (see (2) Note
above)
318, Electricity: Motive Power Systems, for subject matter
involving a combination of an electric motor for rotating an
antenna for scanning, sweeping or orienting, motor control,
and antenna, where the antenna is claimed by name only (see
(2) Note above).
Subclass:
767
This subclass is indented under subclass 700. Subject matter
including a conducting surface, such as a metallic sheet
which may be flat or curved, and an aperture in the surface,
which may be completely surrounded by the surface or extended
inwardly from an edge of the surface, together with coupling
means which establishes a potential difference at spaced
points along the aperture or extracts received energy from
these points, these points usually being across the aperture,
the surface furnishing a conductive path between these spaced
points to permit current to flow therebetween.
(1) Note. In the event the gap completely separates the
surface into two parts with the spaced points being across
the gap, an electrical short circuit must be provided across
the gap as by a galvanic connection or a resonant short
circuiting line.
(2) Note. The slot is usually resonant (e.g., a half wave
length long, or a perimeter of one wave length) to present a
high slot impedance across the coupling thereto.
(3) Note. Antennas having an aperture in a conductive
surface, wherein the aperture is used merely for coupling the
energy to an antenna are not classified here but in the
appropriate subclass below, for example, subclasses 772+ for
wave guide type antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
741 for high frequency loops, wherein the loop may be formed
of a conductive sheet having a slot-like space between the
adjacent ends.
772 for wave guide type antennas. See (3) Note, above.
789 for antennas within a conductive apertured wall.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, particularly 208,
239+ and 248+ for resonant slots in wave guides.
Subclass:
768
This subclass is indented under subclass 767. Subject matter
wherein structure is provided for modifying the transmission
characteristic of a slot or its coupling, the structure being
normally operated in a cyclical or repetitive manner.
(1) Note. Examples of the subject matter of this subclass
are variable width wave guide coupling, or variable length
wave guide coupling, or a movable shutter in front of or
behind the slot or in the wave guide coupling. The purpose
of this modification of the transmission characteristic is
usually for scanning, sweeping or orienting the antenna
pattern.
(2) Note. In the subject matter of this subclass physical
motion of parts of the antenna may occur for control of the
transmission characteristic for scanning, sweeping or
orienting the pattern. However, where the antenna and/or its
reflector moves as a unit or where relative motion occurs
between the active antenna and its reflector for scanning,
sweeping or orienting the antenna pattern, classification is
in subclasses 757+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
757 for directive antennas with means for moving the antenna
for scanning, sweeping or orienting. See also (2) Note,
above.
777 for plural wave guide type antennas with control of the
individual antennas.
854 for antennas with adjustable coupling.
876 for antennas with switching between the antennas and the
associated lines.
SEE OR SEARCH CLASS:
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar Radio Navigation), 422 and subclasses 428+ for
direction finding receivers with effectively moveable
directional patterns.
Subclass:
769
This subclass is indented under subclass 767. Subject matter
wherein the aperture is shaped as a narrow annulus on a flat
conducting surface or a band removed from the wall of a
conducting cylinder.
(1) Note. Usually the opposing walls of the aperture are
electrically connected at a point remote from the coupling.
Subclass:
770
This subclass is indented under subclass 767. Subject matter
including two or more apertures in a surface, or two or more
surfaces each having at least one aperture, all as defined in
subclass 767, above.
(1) Note. A single physically continuous slot composed of a
plurality of discrete and separately identifiable sections is
classified in this subclass, if each section operates
separately and independently as a slot antenna. For example,
a zigzag slot where each straight section is in itself a
separate resonant slot is classified in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
768 for plural slot type antenna with periodic control of
the slot or its coupling.
774 for stacked bi-conical horn antennas.
776 for plural wave guide type antennas in general.
893 and the Search Notes thereunder, for plural antennas in
general.
Subclass:
771
This subclass is indented under subclass 770. Subject matter
wherein at least one of the apertures is combined with a wave
guide (or resonant cavity) for energizing the aperture or
conducting energy therefrom.
(1) Note. The wave guide must perform the coupling
function. Plural slot antennas wherein the apertures are
directly fed by a transmission line connected to the opposite
edges of the slot, and having a resonant cavity in back of
the aperture as a reflecting means for confining the energy
in one direction but not performing the coupling function,
are not classified in this subclass but in subclass 770,
above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
762 for moving wave guide type antennas with means for
moving, scanning, sweeping or orienting.
772 for wave guide type antennas.
853 for plural antennas with a coupling network.
844 for plural antennas in general spaced a fractional or
full wave length apart.
Subclass:
772
This subclass is indented under subclass 700. Subject matter
wherein a wave guide is provided between free space and a
generator or receiver of radio wave energy, or between free
space and a nonwave guide coupling or connecting structure
which establishes in or collects from the wave guide radio
wave energy, the wave guide constraining this energy in its
passage to or from free space, and being directly connected
with free space without any intervening nonwave guide
coupling (such as a probe and dipole).
(1) Note. The guide may be a cavity resonator, or a horn.
(2) Note. The wave guide must guide the wave energy between
free space and the nonwave guide coupling, oscillator or
receiver for classification in this subclass.
(3) Note. Usually the wave guide has a configuration or
structure which substantially matches the impedance to that
of free space, such as a horn.
SEE OR SEARCH THIS CLASS, SUBCLASS:
762 for wave guide type antennas with means for moving the
antennas for scanning, sweeping or orienting.
767 for slot type antennas which may involve wave guide
structure.
SEE OR SEARCH CLASS:
181, Acoustics, for mechanical acoustical devices which
collect or emit sound waves to or from an unconfined space
containing a sound conducting medium.
219, Electric Heating, 678 for microwave heating.
333, Wave Transmission Lines and Networks, particularly 1,
227 and 239, for wave transmission lines and networks
involving wave guides and cavity resonators.
Subclass:
773
This subclass is indented under subclass 772. Subject matter
wherein the wave guide has its opposing surfaces formed as
conical or flared surfaces of revolution on a common axis,
the spacing between the surfaces increasing from the apices
towards the peripheries, the coupling to the source or
collector extending from the apices, as by a coaxial line or
wave guide, through one of the surfaces of revolution, the
surfaces guiding the wave energy between the apices and the
peripheries.
(1) Note. The patents of this subclass resemble somewhat in
structure the sleeve and ground plane antennas of subclasses
790+ and 829+. However, in this subclass (773) the opposing
surfaces act merely as a wave guide; while in the other two
subclasses this wave guide action is not present, but one or
both of the surfaces acts directly as a radiator or collector
of radio wave energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
786 for wave guide type antennas with horns.
790 for sleeve type antennas. See also (1) Note, above.
807 for tapered balanced doublet antennas.
809 for fractional, multiple or full wave type antennas
including grounding structures. See also (1) Note, above.
Subclass:
774
This subclass is indented under subclass 773. Subject matter
wherein a plurality of bi-conical horn type antennas as
defined in subclass 773 above are spaced along a common axis,
their respective axes coinciding with the common axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
776 for plural wave guide antennas in general.
884 for antennas with a transmission line or wave guide as a
support.
Subclass:
775
This subclass is indented under subclass 773. Subject matter
wherein the bi-conical horn type antenna as therein defined
is combined with external conductive structure which
reradiates into free space impinging radio waves coming from
or going to the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
755 for antennas with spaced radio wave lenses or
diffractors and reflectors.
779 for plural wave guide type antennas generally with a
reflector.
780 for "pillbox" type antennas.
781 for single wave guide type antennas with a reflector.
834 and the Search Notes thereunder, for antennas with
reflectors in general.
912 for reflectors, per se.
Subclass:
776
This subclass is indented under subclass 772. Subject matter
wherein two or more wave guides are provided at the
connection to free space to result in two or more wave guide
paths each directly coupled to free space.
(1) Note. The wave guides may be formed as branches from a
common guide remote from the free space coupling end, or may
be separate and distinct guides independently coupled by
non-wave guide structure to their transmitter and/or
receiver, or may be merely a divided guide such as a baffled
horn with separate wave guide paths existing on each side of
the baffle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
773 for bi-conical horn type antennas.
844 for plural antennas spaced a fractional or full wave
length apart.
853 for coupling networks for plural antennas.
879 for supports for plural separate antennas.
893 and the Search Notes thereunder, for plural antennas in
general.
Subclass:
777
This subclass is indented under subclass 776. Subject matter
wherein at least one antenna has in its wave guide path or
its coupling to the transmitter or receiver, structure such
as a switch or adjustable impedance, which alters the
amplitude or phase of the energy passing through the path or
coupling to modify the radiation or polarization pattern of
the antenna.
(1) Note. Included here are plural wave guide antennas
having switches in the coupling paths for lobbing the antenna
beam, or having variable impedance in the coupling paths for
steering the composite beam from the antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
757 for antennas having means for moving the antennas for
scanning, sweeping or orienting.
768 for slot type antennas with control of the slot or
coupling.
854 for antennas in general with adjustable coupling
networks.
876 for antennas with switching between the antennas and the
associated lines.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 2 for plural
channel wave transmission systems with automatic control, and
subclasses 101+ for branched wave transmission lines with
switching.
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar Radio Navigation), 385 wherein a distinctive
signal is sent or received denoting course, direction, or
orientation.
Subclass:
778
This subclass is indented under subclass 776. Subject matter
wherein the wave guide or coupling path of the respective
antennas have significant phase characteristics in the
transmission of energy therethrough, to modify the relative
phase relationship of the transmitted radio wave energy of
the respective antennas at their coupling to space, or to
modify the relative phase relationship of the received radio
wave energy in passing through the antennas and/or coupling
paths.
(1) Note. The different phase characteristic is usually
secured by a delay network in the coupling path of one of the
antennas or a dielectric delaying mass in the wave guide path
of one of the antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
844 for plural antennas spaced a fractional or full wave
length apart.
853 for plural antennas with coupling in general.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 100 for branched
wave transmission lines and networks which may involve
phasing.
Subclass:
779
This subclass is indented under subclass 776. Subject matter
wherein the plural wave guides as defined therein are
combined with external conductive structure (usually
metallic) which reradiates into free space impinging radio
waves coming from or going to the wave guides.
SEE OR SEARCH THIS CLASS, SUBCLASS:
775 for bi-conical horn type antennas with a reflector.
780 for "pillbox" type antennas.
781 for single wave guide type antennas with an external
reflector or director.
834 and the Search Notes thereunder, for antennas with
parasitic reflectors in general.
Subclass:
780
This subclass is indented under subclass 772. Subject matter
wherein the wave guide includes two parallel plates which are
closed along a portion of their perimeter by a reflector, the
spacing between the plates being small compared to their
surface dimensions, the plates being electrically open to
free space over a relatively large portion of their
perimeter.
SEE OR SEARCH THIS CLASS, SUBCLASS:
781 for wave guide type antennas with a reflector or
director.
834 and Search Notes thereunder, for antennas with parasitic
reflectors in general.
912 for reflectors or directors, per se.
Subclass:
781
This subclass is indented under subclass 772. Subject matter
wherein the wave guide antenna as defined therein is combined
with external conductive structure (usually metallic) which
reradiates into free space impinging radio waves coming from
or going to the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
755 for antennas with spaced radio wave lenses or
diffractors and reflectors.
775 for bi-conical horn type antennas with a reflector.
779 for plural wave guide type antennas with a reflector.
780 for "pillbox" type antennas.
833 for antennas with directors in general.
834 and the Search Notes thereunder, for antennas with
reflectors in general.
912 for reflectors or directors, per se.
Subclass:
782
This subclass is indented under subclass 781. Subject matter
wherein structure or arrangement is provided to reduce
reflection or the effect or reflection of the transmitted
wave energy from the reflector back into the active
transmitting antenna.
(1) Note. This effect is sometimes referred to as matching
the reflector to the active antenna. The effect is obtained,
for example, by means of a second compensating reflector or
tilting the antenna with respect to the reflector.
SEE OR SEARCH THIS CLASS, SUBCLASS:
762 for wave guide type antennas with means for moving the
antenna for scanning, sweeping or orienting.
837 for antennas with plural reflectors, particularly
subclass 838, where one of the reflectors is a screening
reflector.
841 for antennas with electrical shields.
862 for antennas with coupling networks for impedance
matching of an antenna to its coupling means, which include
long line elements.
912 for reflectors, per se.
Subclass:
783
This subclass is indented under subclass 772. Subject matter
wherein the wave guide contains a mass (usually dielectric)
which freely passes radio waves, and which is shaped or
positioned to delay or accelerate waves passing therethrough
an amount which varies over the wave front for such purposes
as focusing, changing direction, or changing the wave front
as from circular to planar.
SEE OR SEARCH THIS CLASS, SUBCLASS:
753 for antennas having spaced radio wave lenses or
diffractors associated therewith.
756 for antennas having polarization filters associated
therewith.
785 for dielectric wave guide type antennas.
909 for refracting means and radiant energy filters (e.g.,
lenses and polarizers), per se.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, particularly 239
and 248+, for wave guides having lenses or refracting means.
Subclass:
784
This subclass is indented under subclass 772. Subject matter
wherein the wave guide has a mass extending across the wave
guide adjacent the end coupling the wave guide to free space,
the mass being of material which freely passes
electromagnetic wave energy.
(1) Note. The purpose of this mass is usually protection
against weather, sealing the interior of the guide, or
matching the guide to free space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
789 for antennas within an apertured wall, which may have a
closure.
872 for antennas with housings or protective coverings.
Subclass:
785
This subclass is indented under subclass 772. Subject matter
wherein the wave guide is formed of an elongated dielectric
mass, which may be hollow, the source or receiver of energy
being adjacent one end of the mass and the coupling for
radiation to or from free space occurring along the sides or
at the other end.
(1) Note. By dielectric is meant a material having a
dielectric constant materially greater than air.
(2) Note. The mass may be a solid, or confined gas or
liquid. This dielectric mass should be the essential
conductor of the electromagnetic waves between the source or
receiver of the energy and free space. A dielectric mass in
a wave guide antenna which merely modifies the characteristic
of the energy passing through the guide, the guide itself
being the essential conductor, is not classified in this
subclass but in subclass 783.
SEE OR SEARCH THIS CLASS, SUBCLASS:
753 for antennas with spaced radio wave lenses or
diffractors which may be of dielectric material.
776 for plural wave guide antennas which may be of the
dielectric type.
783 for wave guide antennas with internal dielectric
refracting means. See also (2) Note, above.
907 particularly subclasses 909+, for antenna components
which may be constructed of dielectric materials.
Subclass:
786
This subclass is indented under subclass 772. Subject matter
wherein the wave guide diverges, or flares, in at least one
dimension towards free space.
(1) Note. While in a horn a reflecting function may be
performed, the general purpose of the confining walls between
the emitter or collector and the mouth of the horn is for
guiding the energy to or from the emitter or collector and
the mouth, while reflectors as in subclasses 834+, etc.., do
not perform this guiding function but merely reradiate the
impinging energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
762 for horn type antennas with means for moving the antenna
for scanning, sweeping or orienting.
773 for biconical type horns.
776 for plural horns, or sectionalized horns, having two or
more wave guide paths.
784 for horns with closures.
834 and 912+, for antennas with reflectors, and reflectors,
per se, respectively. See (1) Note, above.
SEE OR SEARCH CLASS:
181, Acoustics, 177, for megaphones.
Subclass:
787
This subclass is indented under subclass 700. Subject matter
including magnetic material which modifies the inductance of
the active portion of the antenna.
(1) Note. The magnetic material may be in the path of the
radio waves to or from the active portion of the antenna, or
in a permanent magnet or energized magnet which increases the
magnetic field around the active portion of the antenna.
(2) Note. Magnetic material in the coupling circuit, such
as a magnetic core coupling transformer, is not sufficient
for classification here. Such subject matter with an antenna
in general is found in subclasses 850+, below.
(3) Note. See (2) Note under subclass 866 below for the
line between loop antennas and the inductor devices
classified in Class 336, Inductor Devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
745 for antennas with reactance for tuning the antenna.
850 for antennas having a coupling network or impedance in
the leadin which may involve inductors having magnetic
material such as iron cores.
SEE OR SEARCH CLASS:
336, Inductor Devices, appropriate subclasses for inductors
involving magnetic material, and subclass 110 where the
inductor is combined with a permanent magnet.
Subclass:
788
This subclass is indented under subclass 787. Subject matter
wherein the active antenna comprises a coil of one or more
turns adapted to be connected at its ends to a pair of leadin
terminals.
(1) Note. For a field of search pertinent to loop antennas
see the Notes under subclass 866, below.
Subclass:
789
This subclass is indented under subclass 700. Subject matter
wherein a definite space is provided beneath an aperture in a
conducting surface, and at least one antenna is mounted in
the space with its active portion at least partially beneath
the surface to transmit or receive radio wave energy when so
mounted.
(1) Note. The subject matter in this subclass usually
involves an antenna mounted in a recess below the skin of an
airplane to avoid the air currents. The recess may be
covered, as by an insulating cover which passes radio wave
energy.
SEE OR SEARCH THIS CLASS, SUBCLASS:
702 for antennas with significantly related cabinet
structure.
705 and 709+, for antennas with significantly related
aircraft or watercraft structure, respectively.
767 for slot type antennas.
872 for antennas with housings in general.
889 for rod type antennas retractable into a support.
Subclass:
790
This subclass is indented under subclass 700. Subject matter
wherein an active antenna element, which may be a complete
antenna or a portion of one (such as an arm of a dipole), is
formed as a cylinder, prisms, or frustum of a cone or prism,
or defines such a surface (such as series of circularly
arranged parallel wires), is combined with a feed line which
supplies radiating energy to or from this antenna element or
to or from another antenna element; and which enters the
cylinder at one end and extends within the cylinder at least
a portion of the distance to the other end; and where the
feed line is electrically coupled to this cylinder the
coupling is remote from the entrance end, there being a
substantial insulating space between the inner surface of the
sleeve and the portion of the feed line extending within the
cylinder.
(1) Note. The feed line may be the feed to the sleeve
element, or to another active element, or to both. The feed
line may also be a support for the sleeve element or for
other antenna elements. The feed line may be the ground
return, such as the connection to the outer conductor of a
coaxial line where the inner conductor is connected to any
portion of the active element.
(2) Note. In this subclass the feed line is spaced along
its length from the inner surface of the sleeve, as opposed
to the case of telescoping parts as in subclasses 823 and
901+, wherein the parts are in substantial engagement over
their telescoping length. Further, in these last mentioned
subclasses, the feeding portion usually surrounds the free
end portion.
(3) Note. The sleeves forming active antennas of this
subclass are distinguished from superficially similar sleeves
as found in subclass 830 in that the latter sleeves form
ground planes performing no active function as collectors or
emitters of radiation (though they usually have reflecting
properties); whereas the sleeves of this subclass are active
radiators or collectors of radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
773 for bi-conical horn wave guide type antennas.
807 for doublets whose active elements are thick or enlarged
to form a sleeve.
823 for doublet type antennas having telescoping arms. See
(2) Note, above.
830 for fractional, multiple or full wave linear antenna
with grounding structure, and having coaxial feed line. See
(3) Note, above.
884 for antennas where a plural wire transmission line or
wave guide is the support.
901 for rod type telescoping antennas. See (2) Note, above.
Subclass:
791
This subclass is indented under subclass 790. Subject matter
wherein an active rod, which may be hollow, forms an
extension of and is electrically connected to the feed line
and is coaxial with the active sleeve.
(1) Note. The active rod and sleeve are often in electrical
effect a doublet as defined in subclass 793 below; but are
structurally different in that the rod and sleeve are not
similar. The rod is usually of a smaller diameter than the
sleeve.
SEE OR SEARCH THIS CLASS, SUBCLASS:
725 for plural separate diverse type antennas. See also (3)
Note, under subclass 725.
801 for doublet antennas formed of three or more collinear
elements.
823 for doublet antennas with telescopically arranged
respective arms. See (3) Note under subclass 790, above.
827 with collinear arranged fractional, multiple or full
wave length linear type antennas.
830 for linear type antennas with ground planes fed by
coaxial lines. See (3) Note under subclass 790, above.
Subclass:
792
This subclass is indented under subclass 790. Subject matter
wherein the sleeve is combined with a mass having a
substantially similar external shape, and wherein the sleeve
and mass are fed in balanced relation, at least one of the
feed lines extending from one end within the sleeve at least
a portion of the distance to the other end.
SEE OR SEARCH THIS CLASS, SUBCLASS:
791 for sleeve type antennas having in addition a rod type
radiator.
793 for balanced doublet type antennas in general,
particularly subclass 802 for such antennas with distributed
reactance, subclass 807 for such antennas thick or enlarged,
and subclass 823 for such antennas having telescoping arms.
Subclass:
792.5
This subclass is indented under subclass 700. Subject matter
including a series of electrically coupled radiating masses
spaced along an axis of the antenna, the spacing of the
masses from a fixed point on the axis and a dimension of
corresponding masses progressively increasing along the axis
in a manner approximating a geometrical or logarithmic
progression.
(1) Note. The ratios of the spacing and dimension of
respective radiating masses are usually substantially equal.
The radiating masses are usually dipoles.
SEE OR SEARCH THIS CLASS, SUBCLASS:
807 for dipoles with tapered arms.
811 for fish bone type dipole antennas.
Subclass:
793
This subclass is indented under subclass 700. Subject matter
wherein two active conducting masses, which are substantially
alike, are physically symmetrically disposed on opposite
sides of electrically balanced, antenna lead-in terminals,
each of the masses being connected to a respective terminal.
(1) Note. The term "active conducting masses" above is
construed to exclude antenna components such as
counterpoises.
(2) Note. The radiating masses are deemed substantially
alike, if one mass has a nonradiating attachment such as a
support to constitute a nonsymmetrical structure. It is only
necessary that the radiating portions be substantially alike
to meet this requirement in the definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
726 and 727, for plural separate diverse type antennas which
include balanced doublets.
730 for plural diverse type antennas using the same active
element including balanced doublets.
731 for traveling wave type antennas which may include
balanced portions.
740 for antennas of the balanced type with a terminating
resistance at the open end.
741 for high frequency loop type antennas which may be
composed of a plurality of doublet type antennas.
747 for antennas of the balanced doublet type with variable
reactance for tuning.
749 for antennas with lumped reactance for loading which may
include a balanced doublet.
792 for doublet type antennas including an active sleeve
which surrounds the feed line.
824 for planar arrays of linear antennas.
825 for fractional, multiple, or full wave length linear
type antennas.
865 for balanced antennas in general with a balanced
coupling network.
Subclass:
794
This subclass is indented under subclass 793. Subject matter
including two doublets as defined respectively in two of the
subsequent subclasses 795, 801, 802, 803, 804, 805, 806, 808,
809, 811, and 823, or wherein two doublets each within the
scope of subclass 793 above, have structurally different
radiating masses to present significantly different
electrical properties or radiation properties.
(1) Note. A mere difference in size with changed electrical
or radiation properties normally following from such
difference in size is not sufficient to constitute diverse
type doublets within the definition.
(2) Note. Two groups of doublets, which doublets are in
themselves not diverse in type but which groups have
significantly different arrangements such as plural crossed
or plural circumferentially arranged, are not classified in
this subclass, but in the pertinent plural subclasses of
doublets, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
724 for antennas convertible to different types of antennas,
which may include conversion of one type of doublet to
another type of doublet or from a doublet to another type of
antenna.
726 and 727, for plural separate diverse type antennas which
include a doublet type antenna.
730 for plural separate diverse type antennas using the same
active element including a doublet type antenna.
Subclass:
795
This subclass is indented under subclass 793. Subject matter
wherein the conductive masses are each formed as a sheet, or
each formed as a closed portion (e.g., closed loop) defining
a sheet-like surface.
(1) Note. The sheet may have openings therein, such as
exist in a screen or grid. The closed portion may be formed
by a conductor or series of conductors defining a closed
path. Grid conductors may extend from spaced points on the
closed portion, and lie in the plane of the closed portion.
These antennas include types designated as fan, wing, sheet,
grid or screen. A mere plurality of rods free at one end and
joined at the other end is not classified here, but in such
subclasses as 808 and 811, below. For classification here
the rods must form a closed path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
803 for folded doublets.
806 for doublets having bent arms.
808 for doublets with a plural-rod arm forming a V. See
also (1) Note, above.
811 for fishbone type arrays.
824 for planar arrays of linear antennas.
897 for mesh, woven, braided or multiple strip type
antennas.
Subclass:
796
This subclass is indented under subclass 793. Subject matter
including a plurality of doublets spaced along an axis, an
adjacent two of these doublets being similar and angularly
spaced with respect to each other around the same axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
742 for stacked high frequency loop type antennas.
776 for plural wave guide type antennas.
798 for plural groups of crossed doublet antennas (e.g.,
turnstile).
800 for plural groups of circumferentially arranged doublet
antennas.
878 for supports for antennas, particularly subclasses 879
for supports for plural separate antennas, 884 where a wave
guide or plural transmission line forms the support, 890 for
antennas mounted on a post, standard or tower, and 892 for
bracket supports for antennas.
Subclass:
797
This subclass is indented under subclass 793. Subject matter
including at least two like doublets, the conductive masses
of each doublet being elongated in shape and collinearly
arranged, the doublets crossing one another at their
midpoints.
SEE OR SEARCH THIS CLASS, SUBCLASS:
799 for plural circumferentially arranged doublets, and see
also the search notes thereunder.
808 for single doublets, wherein each arm is formed as V.
Subclass:
798
This subclass is indented under subclass 797. Subject matter
wherein a plurality of doublets as therein defined is
combined with a second distinct plurality of doublets as
therein defined.
(1) Note. Usually this subject matter involves two or more
distinct radially arranged (crossed over doublets) stacked
along a support. The arrangements of the respective
pluralities of doublets of the array may be the same or
different within the scope of subclass 797. See subclass 794
above for combinations of single doublets of diverse type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
774 for stacked bi-conical horn type antennas.
796 for helically or angularly staggered plural dipoles.
800 for plural groups of plural circumferentially arranged
antennas.
884 for antennas with plural wire transmission lines or wave
guides as a support for the antenna.
Subclass:
799
This subclass is indented under subclass 793. Subject matter
wherein at least three doublets have their midpoints arranged
on the circumference of a circle and equally spaced around
this circumference; or wherein three doublets so arranged are
disclosed in the specifications, and it is claimed that a
plurality of doublets have a circumferential arrangement, or
are in circular array, or are in cylindrical formation, or
equivalent terminology; or wherein at least two doublets are
so arranged and have their arms so curved that all the arms
lie in a circle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
741 for high frequency type loops.
796 for helically or angularly staggered plural dipoles.
797 for plural crossed doublets.
810 for plural doublets.
824 for planar arrays of linear antennas.
826 for plural multiple, fractional or full wave linear type
antennas.
835 for plural active antennas with parasitic reflectors.
844 for plural antennas spaced a fractional or full wave
length apart.
853 for plural antennas with a coupling network or impedance
in the leadin.
879 for supports for plural separate antennas.
893 for plural antennas in general.
SEE OR SEARCH CLASS:
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigation), 385 for beacons which may
involve circumferentially arranged doublets.
Subclass:
800
This subclass is indented under subclass 799. Subject matter
wherein a plurality of doublets as herein defined is combined
with a second distinct plurality of doublets as therein
defined.
(1) Note. Usually this subject matter involves two or more
distinct circularly arranged arrays stacked along a support.
The arrangements of the respective pluralities of doublets
may be the same or different within the scope of subclass
799. See subclass 794 above for combinations of single
doublets of diverse type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
742 for high frequency loop type antennas which may be in
diverse planes and stacked.
774 for biconical horn type antennas which may be stacked.
796 for helically or angularly staggered plural doublets.
798 for plural groups of plural radially arranged doublets.
835 for plural active antennas with reflectors.
884 for antennas with plural wire transmission lines or wave
guides as a support for the antenna.
Subclass:
801
This subclass is indented under subclass 793. Subject matter
wherein the active conductive masses are of elongated shape
and are longitudinally divided into at least three discrete
portions which are substantially aligned along their
longitudinal axes.
(1) Note. The break at the antenna terminals may constitute
one of the longitudinal divisions. The divisions (between
discrete collinear portions) usually include some phasing
means (e.g., a long line) to shift the phase between the
separate portions.
(2) Note. Subject matter involving plural collinear
doublets each as herein defined wherein the respective
portions are cross-connected, instead of the respective
doublets having their respective portions connected in
series, is classified herein.
(3) Note. Subject matter wherein collinear doublets as
herein defined have lumped reactance means between portions
as for loading is classified in subclasses 749+, above; while
where distributed reactance is included between portions,
such subject matter is classified herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
722 for antennas with lumped reactance filters between
antenna portions.
749 for antennas with lumped reactance for loading. See (3)
Note, above.
802 for doublet antennas with distributed reactance added to
the arms.
813 for doublet antenna arrays in a parallel and collinear
arrangement.
824 for planar arrays of linear antennas.
827 for fractional, multiple and full wave type antennas in
collinear arrangement.
Subclass:
802
This subclass is indented under subclass 793. Subject matter
wherein each conducting mass includes in addition to its own
inherent reactance a distributed reactance in series or in
shunt with the mass, at least a part of the distributed
reactance being spaced on the radiating mass from the antenna
lead-in terminals, i.e., the distributed reactance is not
physically and electrically entirely disposed between the
conducting mass and the antenna lead-in terminals.
(1) Note. This distributed reactance may result from an
abrupt change in shape of the conducting mass, or from a
portion extending from the main body of the mass such as a
branch.
(2) Note. Subject matter wherein the arms of a doublet are
merely adjustable in length without any nonuniformity or
without any abrupt change in shape with its consequent
loading effect is not classified herein, but in subclass 823
below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
744 for high frequency loop type antennas with series
reactance in the loop path.
749 for antennas with lumped reactance for loading.
801 wherein three or more collinear units form a doublet.
See also the Notes under subclass 801.
806 for balanced doublets having bent arms.
828 for fractional, multiple, or full wave linear type
antennas having a non-uniformity therein for reactive
effect.
843 for antennas having an appreciable wave length
dimension.
895 for spiral and helical type antennas.
899 for antennas with area increasing means (e.g.,
spiniferous).
Subclass:
803
This subclass is indented under subclass 793. Subject matter
wherein the two active conductive masses include elongated
conductors which extend outwardly from the antenna lead in
terminals together with an additional elongated conductor or
conductors extending along the length of and close to the
first conductors to form a transmission line therewith, the
first and second conductors being joined at the outer ends as
by bending to present a substantially increased radiation
resistance at the antenna lead in terminals.
(1) Note. While folded dipoles may form a closed circuit as
do the high frequency loops in subclass 741 above, the
conductors of the folded dipole are close together to form a
transmission line, whereas the conductors of the high
frequency loop are spaced further apart so that the closed
circuit encloses a relatively larger area.
SEE OR SEARCH THIS CLASS, SUBCLASS:
741 for high frequency type loops. See also (1) Note,
above.
Subclass:
804
This subclass is indented under subclass 803. Subject matter
wherein the second conductors comprise a plurality of
conductors in parallel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
795 for wing type doublet antennas.
896 for antennas having rods or wire forming a cage or a
hollow post.
Subclass:
805
This subclass is indented under subclass 793. Subject matter
wherein the two active conductive masses are elongated and
are supported adjacent the lead-in terminals by structure
permitting relative angular movement with respect to one
another, as by a pivot or hinge, for such purposes as folding
or electrically adjusting the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
880 for antennas in general with adjustable or collapsible
supports.
915 for collapsible, foldable or adjustable reflectors or
directors.
Subclass:
806
This subclass is indented under subclass 793. Subject matter
wherein each of the separate conductive masses constitutes a
rod having a bend or curve therein remote from the lead-in
terminal to constitute a change in direction of the rod, and
all portions on both sides of the bend being radiators or
collectors of radio wave energy.
(1) Note. Subject matter involving a mere loop in the
conductive mass where the direction of the active radiating
or collecting member resumes its original direction in a
straight line and where such loop is itself not an active
part of the radiating member, but serves, for example, merely
as a phasing or loading means is not classified in this
subclass but in such subclasses as 801 and 802.
SEE OR SEARCH THIS CLASS, SUBCLASS:
733 and 736, for traveling wave type antennas in the form of
a rhombus and inverted V, respectively.
803 for folded doublet type antennas.
899 for antennas with area increasing means such as
spiniferous.
Subclass:
807
This subclass is indented under subclass 793. Subject matter
wherein each mass constitutes an elongated portion which is
tapered, or significantly thickened or enlarged over at least
a portion of its length, such as a thick elongated rod,
cylinder, or cone, for impedance matching, broadbanding, or
presenting a larger area for wave energy radiation or
collection.
(1) Note. The elongated portion may be a single rod, or a
plurality of rods or wires forming substantially a single
conductive mass and enclosing a volume, as opposed to the
sheet or screen type mass of subclass 795, which defines a
plane. Such wires or rods for classification in subclass
807, would have the ends remote from the feed points
electrically connected, as by a conductive loop, or being
joined at a common point, as opposed to subclass 808 wherein
the diverging rods are electrically free at their outer
ends.
SEE OR SEARCH THIS CLASS, SUBCLASS:
790 for sleeve type antennas.
795 for sheet or screen type doublet antennas. See also (1)
Note, above.
808 for doublets wherein the plural rods form a V. See also
(1) Note, above.
831 for stub type fractional, full wave, or multiple wave
linear type antennas.
874 for mast or tower type antennas.
895 for spiral or helical type antennas.
896 for antennas wherein rods or wires form a cage or hollow
post.
897 for mesh, woven, braided or multiple strip type
antennas.
898 for hollow metallic body type antennas.
899 for antennas having area increasing means, e.g.,
spiniferous or metal ball on top.
Subclass:
808
This subclass is indented under subclass 793. Subject matter
wherein each conductive mass is composed of a plurality of
straight linear rods which diverge from and are electrically
connected at a common point.
(1) Note. In this subclass the diverging rods of each
conductive mass are electrically free at their outer ends, as
distinguished from subclass 795 above wherein the diverging
rods are electrically connected together at their ends.
SEE OR SEARCH THIS CLASS, SUBCLASS:
794 for antennas wherein the plural rod arms form a V and
the sides of each V are significantly different.
795 for sheet or wing type doublet antennas.
797 for plural doublets which cross at their mid-points.
807 for doublet antennas having tapered, thick, or enlarged
arms.
Subclass:
809
This subclass is indented under subclass 793. Subject matter
wherein the conductive masses are straight and linear, and
which are angularly disposed to form a V.
SEE OR SEARCH THIS CLASS, SUBCLASS:
735 for balanced V traveling wave type antennas.
805 for doublet antennas whose arms are angularly
adjustable.
808 for doublet antennas wherein each doublet arm has plural
rods formed as a V.
Subclass:
810
This subclass is indented under subclass 793. Subject matter
including two or more separate and independent doublets as
therein defined.
(1) Note. For classification herein the doublets must have
their respective arms physically distinct and separate. A two
arm doublet even when connected to two sources or loads at
different frequencies, and which radiates at both frequencies
efficiently is not sufficient for classification herein, but
would normally be classified as a single doublet in such
subclasses as 818+, 820+ and 823+, below. Further the
doublets must have their respective arms independently
connected to the source or load. When the arms of one
doublet are connected to the source or load through the arms
of the other doublet as a current conducting medium,
classification is not here but in subclass 801, where the
three or more arms of the respective doublets are collinear.
SEE OR SEARCH THIS CLASS, SUBCLASS:
726 and 727, for plural separate diverse type antennas
including a balanced doublet.
730 for plural diverse antennas using the same element
including a balanced doublet.
741 for high frequency type loops formed by a plurality of
balanced doublets.
794 for diverse type doublets.
796 for helically or angularly staggered plural dipoles.
797 for plural crossed balanced doublets.
799 for plural circumferentially arranged doublets.
801 for doublets formed by three or more collinear units.
824 for planar arrays of linear antennas.
826 for plural linear type antennas having an appreciable
wave length dimension.
844 for plural antennas spaced a fractional or full wave
length apart.
879 for supports for plural separate antennas.
893 and the Search Notes thereunder, for plural antennas in
general.
Subclass:
811
This subclass is indented under subclass 810. Subject matter
wherein the respective arms of the doublets are connected by
two straight parallel closely spaced nonradiating or
noncollecting feed lines, the signal source or load being
connected at one end of these lines together with structure
substantially eliminating standing waves on these lines, as
by terminating the end of the lines opposite the signal
source or load in a resistance equal to the characteristic
impedance of the lines.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731 for traveling wave type antennas generally.
739 for antennas with a terminating resistance at the open
end.
770 for plural slot type antennas.
826 for plural fractional, multiple or full wave linear type
antennas.
899 for antennas with area increasing means, which may be
spiniferous.
Subclass:
812
This subclass is indented under subclass 810. Subject matter
wherein each arm of one doublet is physically parallel to
each arm of another doublet, the arms of these doublets being
substantially straight and linear.
SEE OR SEARCH THIS CLASS, SUBCLASS:
799 for circumferentially arranged doublets which may have
parallel arms
811 for fishbone type arrays.
Subclass:
813
This subclass is indented under subclass 812. Subject matter
wherein in addition to the parallel arranged doublets, a
further doublet is provided, whose two arms together with the
two arms of one of the parallel arranged doublets lie along a
single straight line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
790 for sleeve type antennas wherein a plurality of
radiating sleeves may surround a feed line.
801 for single doublets formed of three or more collinear
units.
827 for plural collinearly arranged fractional, multiple or
full wave linear type antennas.
Subclass:
814
This subclass is indented under subclass 812. Subject matter
including a passive network (which may be resistive,
inductive or capacitive or any combination thereof) for
transmitting signal energy between the doublets and a source
or a receiver of such signal energy.
(1) Note. For an explanation of the terms used in the above
definition and distinctions between coupling and tuning
subclasses, see (1) to (4) Notes under subclass 850, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
811 for fishbone type arrays of doublet antennas.
813 for parallelly and collinearly arranged doublet antennas
with coupling networks.
816 for plural doublet antennas generally with coupling
networks.
820 for single doublet antennas with coupling networks.
852 for plural antennas in general with impedance matching
networks.
853 for plural antennas in general with coupling networks.
Subclass:
815
This subclass is indented under subclass 812. Subject matter
wherein the doublets are combined with conductive structure
(usually metallic, e.g., rod) which reradiates into free
space impinging radio waves coming from or going to the
antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
813 for parallelly and collinearly arranged antennas with a
parasitic element.
818 for single doublets with parasitic elements. See also
the Search Notes, thereunder.
Subclass:
816
This subclass is indented under subclass 810. Subject matter
including a passive network (which may be resistive,
inductive, or capacitive or any combination thereof) for
transmitting signal energy between the doublets and a source
or a receiver of such signal energy.
(1) Note. For an explanation of the terms used in the above
definition and distinctions between coupling and tuning
subclasses, see (1) to (4) Notes under subclass 850, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
726 727 and 730, for plural diverse type antennas including a
balanced doublet, which may include a coupling network.
814 for plural parallel balanced doublets with a coupling
network.
820 for single doublet antennas with coupling networks.
852 for plural antennas in general with impedance matching
networks.
853 for plural antennas in general with coupling networks.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 100 for branched
circuits involved in wave transmission networks.
Subclass:
817
This subclass is indented under subclass 810. Subject matter
wherein the plural antennas are combined with conductive
structure which reradiates into free space impinging radio
waves coming from or going to the active antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
813 and 815, for plural parallel balanced doublets with a
parasitic element.
818 for single balanced doublets with a parasitic element.
Subclass:
818
This subclass is indented under subclass 793. Subject matter
wherein the two active conductive masses are combined with
conductive (usually metallic) structure (e.g., a rod) which
reradiates into free space impinging radio waves coming from
or going to the antenna, the velocity of the reradiated wave
having a component which is in the same direction (director)
as, or in the opposite direction (reflector) to, that of the
velocity of the impinging wave.
SEE OR SEARCH THIS CLASS, SUBCLASS:
761 for reflector and antenna relatively movable, together
with means for effecting such motion for scanning, sweeping
or orienting.
813 and 815, for plural parallel balanced doublets with
parasitic elements.
817 for plural balanced doublets generally with parasitic
elements.
832 for subject matter including an active antenna which
also acts as a reflector.
833 for antennas in general with parasitic directors.
834 and the Search Notes thereunder, for antennas in general
with parasitic reflectors.
878 for reflectors or directors generally with supports
therefor.
912 for reflectors or directors, per se.
Subclass:
819
This subclass is indented under subclass 818. Subject matter
including both a director and reflector as defined in the
above subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
833 for antennas in general having parasitic directors and
reflectors.
Subclass:
820
This subclass is indented under subclass 793. Subject matter
wherein the doublet antenna is combined with a passive
network (which may be resistive, inductive or capacitive or
any combination thereof) for transmitting signal energy
between the doublet and a source or receiver of such signal
energy.
(1) Note. For an explanation of the terms used in the above
definition and distinctions between coupling and tuning
subclasses, see (1) to (4) Notes under subclass 850 below.
For more comprehensive search notes to other classes see
those under subclass 850, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
722 for antennas having lumped reactance filters between
active antenna sections.
730 for plural diverse type antennas one of which is a
doublet having a common active radiating or collecting
portion with the other being usually coupling having both
balanced and unbalanced sections to pass high and low
frequency currents according to the operation in question of
the antenna as a doublet or other antenna respectively.
745 for antennas with variable reactance for tuning.
749 for antennas having lumped reactance for loading.
814 and 816, for plural doublets with coupling networks.
850 for antennas with coupling networks in general. See
also (1) Note, above.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, particularly 1
and 24+, for wave transmission coupling networks in general.
Subclass:
821
This subclass is indented under subclass 820. Subject matter
wherein the passive coupling network includes four terminals,
one pair of which are connected to the balanced doublet and
the other pair being for connection to a source or receiver
of signal energy or a circuit network leading thereto; the
impedance across the pair of terminals connected to the
balanced doublet being symmetrical and the network impedance
across the other pair of terminals being asymmetrical with
respect to a given potential plane (e.g., ground), this
latter impedance being effective to convert symmetrical
potential applied at the symmetrical pair of terminals (for
connection to the balanced doublet) to asymmetrical potential
applied at the other pair of terminals or vice versa.
SEE OR SEARCH THIS CLASS, SUBCLASS:
859 for antennas generally with balanced to unbalanced
coupling networks.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 25 for wave
transmission lines and networks with balanced to unbalanced
circuits.
Subclass:
822
This subclass is indented under subclass 820. Subject matter
wherein the passive coupling network includes one or more
impedance elements constructed or proportioned to
substantially eliminate the reflected wave energy between the
doublet antenna and the receiver or signal energy source,
caused by impedance differences.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731 739+ and 811, for antennas with means to eliminate
reflection therein or in the coupling circuits.
821 for impedance matching coupling circuits combined with
balanced to unbalanced circuits and balanced doublets.
852 and 860+, for antennas in general combined with
impedance matching networks.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 32 and 124+ for
wave transmission lines and networks involving impedance
matching or impedance matching networks.
Subclass:
823
This subclass is indented under subclass 793. Subject matter
wherein the overall physical length of the two active
conducting masses is adjustable, as by the length of at least
one of the masses being adjustable or by the relative spacing
of the masses being adjustable, for such purposes as tuning
or collapsing the doublet.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723 for single resonant end-fed linear type antennas
adjustable in length for tuning.
880 for antennas with adjustable or collapsible supports.
889 for rod-like antennas retractable into a support.
901 and the Search Notes thereunder, for telescoping rod
type antennas.
Subclass:
824
This subclass is indented under subclass 700. Subject matter
wherein a plurality of physically separate straight linear
radiating type conductors lie in a planar unique surface; or
the claims recite that the linear conductors are arranged in
a plane, or equivalent subject matter.
(1) Note. The linear conductors are considered separate
when they are isolated in space or nonradiating or
noncollecting means couple the linear portions.
(2) Note. Two parallel linear conductors are not sufficient
for classification here, but rather in subclasses 826+, 844
and 893 below since other surfaces such as a cylinder may be
passed through these conductors. At least three parallel
linear conductors are necessary for classification here, or
else the claims must recite that the antennas lie in a
plane.
SEE OR SEARCH THIS CLASS, SUBCLASS:
797 799+ and 810, for balanced doublet type antennas which
may lie in a plane.
826 for plural fractional, multiple, or full wave linear
type antennas.
835 for plural active antennas with a reflector.
844 for plural antennas spaced a fractional or full wave
length apart.
853 for plural antennas with a coupling network or impedance
in the leadin.
893 and the Search Notes thereunder, for plural antennas in
general.
SEE OR SEARCH CLASS:
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigation), subclasses 1-205 for
directive communication systems which may include an antenna
array.
Subclass:
825
This subclass is indented under subclass 700. Subject matter
wherein the antenna is a straight linear conductor such as a
rod, wire or stub and wherein the claims recite a particular
length, series of length, range of length, or limit of length
of this conductor in terms of its operating wave length, or
the claims recite a physical length in numerical terms (e.g.,
number of feet) and in the latter case the context of the
disclosure establishes that such terms are an appreciable
part of the operating wave length.
(1) Note. This and the indented subclasses are limited to
straight linear antennas or to a plurality of such antennas
dimensioned as recited in the definition above. Antennas in
general (i.e., having a shape other than straight linear)
having an appreciable wave length dimension are classified in
subclass 843, below.
(2) Note. A lattice type mast of appreciable electrical
length which functions as a single elongated conductor, is
classified here. Otherwise classification is in subclasses
874+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723 for single electrically long antennas whose length is
adjustable for tuning.
731 for traveling wave type antennas.
741 for high frequency type loops.
745 for antennas with variable reactance for tuning, this
reactance being in addition to any inherent distributed
reactance of the antennas.
749 for antennas with lumped reactance for loading.
767 for slot type antennas.
790 for sleeve type antennas.
793 for balanced doublet type antennas.
824 for planar type high frequency arrays.
843 for antennas in general having an appreciable wave
length dimension. See also (1) Note, above.
874 for mast or tower type antennas. See also (2) Note,
above.
900 for rod type antennas of no appreciable wave length.
Subclass:
826
This subclass is indented under subclass 825. Subject matter
including a plurality of physically separate linear,
radiating type conductors, at least one of the conductors
having a length as recited in subclass 825.
(1) Note. A first linear conductor with a second such
conductor extending therefrom as a branch is not within the
above definition, since the conductors are not separate as
the definition requires. See subclass 843 for such subject
matter if an appreciable wave length dimension is recited.
(2) Note. The linear conductors are considered separate
when they are isolated in space, or when nonradiating means
or noncollecting means couple the linear conductors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731 and particularly subclass 737 for traveling wave type
antennas involving a plurality of linear antennas of an
appreciable electrical length.
739 for antennas with a terminating resistance, which may
involve a plurality of linear sections of appreciable wave
length dimensions.
741 for high frequency loop type antennas, which may involve
a plurality of linear type sections of appreciable wave
length dimensions.
790 for sleeve type antennas, which may involve a plurality
of linear sections.
793 for center-fed doublet type antennas.
824 for planar type high frequency arrays.
843 for antennas in general having an appreciable wave
length dimension.
844 for plural antennas spaced a fractional or full wave
length apart.
893 and the Search Notes thereunder, for plural antennas in
general.
Subclass:
827
This subclass is indented under subclass 826. Subject matter
wherein the linear conductors have their longitudinal axes
lying substantially on a common straight line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
749 for antennas with lumped reactance for loading, wherein
the reactance may separate collinearly arranged active
sections.
790 for sleeve type antennas, wherein a plurality of active
sleeves may be arranged collinearly along a feed line.
801 for balanced doublets formed by three or more collinear
units.
813 for parallel and collinear separate doublets.
828 for linear antennas with a nonuniformity therein
generally.
875 for sectional mast or tower type antennas.
Subclass:
828
This subclass is indented under subclass 825. Subject matter
wherein the linear antenna has an abrupt change in its
cross-sectional dimension or has a substantially nonradiating
branch.
(1) Note. Usually such changes in dimensions or branches
have a reactive effect which effects a change in the loading
of the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
749 for antennas having lumped reactance for loading.
790 for sleeve type antennas.
802 for balanced doublets with distributed reactance added
to the doublet arms.
827 for plural section antennas collinearly arranged in
which the sections are separated by nonuniformities, which
may be in the form of nonradiating or noncollecting reactive
loops in the antenna conductor.
843 for antennas in general having an appreciable wave
length dimension, which may include branches or abrupt
changes in cross-sectional dimension.
899 for antennas having area increasing means (e.g., changes
in antenna dimensions or branches).
Subclass:
829
This subclass is indented under subclass 825. Subject matter
together with structure including ground or structure most
closely associated with or simulating ground, and such
structure being connected to the terminal of the signal
receiver or source opposing the active antenna terminal
(i.e., having the signal receiver or source interposed
between the active antenna and this structure), for
establishing a reference potential level for operating the
active antenna.
(1) Note. Antennas designated as ground plane, steering
wheel, drooping ground plane, skirt or cone, and flat
circular ground plane antennas are typical of the patents
classified in this and the indented subclass, it being
understood that the length of the active antenna must be set
forth as specified in the definition of subclass 825, above.
Sometimes structure identical with grounding structure
defined in this subclass is designated merely as a shield
decoupling the antenna from its transmission line, and is
classified herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
834 for antennas with parasitic reflectors.
841 for antennas with electrical shields.
846 for antennas in general with grounding structure
including counterpoises.
905 for antennas combined with a transmission line including
shields.
Subclass:
830
This subclass is indented under subclass 829. Subject matter
including a coaxial feed line, the active antenna being
connected to the inner conductor at the end of this line and
the grounding structure being connected to the outer
conductor at the end of this line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
790 for antennas wherein an active sleeve surrounds the feed
line.
Subclass:
831
This subclass is indented under subclass 825. Subject matter
wherein the linear conductor is thickened or enlarged in
cross section to produce such shapes as cylindrical, conical,
diamond, double diamond, and spheroidal.
(1) Note. Usually the antennas are a quarter wave length
long; and the thickening or enlarging is for the purpose of
obtaining a wide band characteristic over a frequency range,
any resulting physical strengthening or streamlining of the
antennas being incidental.
SEE OR SEARCH THIS CLASS, SUBCLASS:
790 for sleeve type antennas.
807 for dipoles having a stub configuration.
826 for plural stub type antennas.
829 for stub antennas with grounding structure, including
counterpoises.
Subclass:
832
This subclass is indented under subclass 700. Subject matter
wherein the claimed subject matter includes an active antenna
designated as a reflector, or includes an energized or active
reflector (i.e., coupled to a signal source or to a
receiver).
(1) Note. The patents classified in this subclass usually
include a plurality of active antennas which are connected to
a single transmitter or receiver, and have a significant wave
length spacing. The subject matter appears very similar to
so-called "end fire arrays". However, in this subclass the
rear active antenna (i.e., in the direction opposed to the
direction of radiation of the array) is designated in the
claim as being a reflector.
Subclass:
833
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with conductive
(usually metallic) structure, (e.g., a rod) which reradiates
into free space impinging radio waves coming from or going to
the active antenna, the velocity of the reradiated wave
having a component in the direction of velocity of the
impinging wave, thereby to modify the radiation pattern of
the active antenna, there being no significant potential
relationship between the active antenna and the conductive
structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
781 for wave guide type antennas with external directors.
815 817 and 818, for dipole antennas with parasitic elements
which may be directors; and subclass 819 for dipole antennas
having both reflectors and directors.
834 for antennas with reflectors.
912 for reflectors and directors, per se.
Subclass:
834
This subclass is indented under subclass 700. Subject matter
wherein an active antenna is combined with conductive
structure (usually metallic, e.g., screen rod or plate) which
returns or reradiates back into free space impinging radio
waves coming from or going to the active antenna, the
velocity of the returned wave having a component in a
direction opposite to the direction of velocity of the
impinging wave, thereby to modify the radiation pattern of
the active antenna, there being no significant potential
relationship between the active antenna and the conductive
structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
755 for antennas with spaced radio wave lens or diffractor
with a reflector; for waveguide-type antennas with
reflectors.
757 for directive antennas with means for moving the
antennas for scanning, sweeping or orienting, which may
include reflectors; and particularly indented subclass 761
for a reflector and antenna relatively movable.
779 780, and 781+, for waveguide-type antennas with
reflectors.
815 817 and 818+, for balanced doublet antennas with
reflectors.
829 for fractional, multiple, or full wave linear type
antennas with grounding structure.
832 where the reflector is also an active antenna.
833 for antennas with a director.
841 for antennas with electrical shields.
846 for antennas with grounding structure including
counterpoises.
878 for antenna and/or reflector with supports.
912 for reflectors or directors, per se, and see also the
search notes under subclass 912.
Subclass:
835
This subclass is indented under subclass 834. Subject matter
including two or more active antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
779 for plural wave guide antennas with a reflector.
815 and 817, for plural balanced doublets with a reflector.
832 for antenna systems wherein an active antenna acts as a
reflector.
893 and Search Notes thereunder, for plural antennas.
Subclass:
836
This subclass is indented under subclass 835. Subject matter
including two or more reflectors as defined in subclass 834.
SEE OR SEARCH THIS CLASS, SUBCLASS:
837 for plural reflectors with a single active antenna.
Subclass:
837
This subclass is indented under subclass 834. Subject matter
including two or more reflectors as defined in subclass 834
above.
(1) Note. When a plurality of reflectors are physically
combined to constitute a unitary reflector, such as the grid
type, such a reflector is considered a single reflector.
Plural reflectors usually occur when successive reflection
occurs, or when reflectors of different type are combined.
SEE OR SEARCH THIS CLASS, SUBCLASS:
836 for plural reflectors with plural active antennas.
Subclass:
838
This subclass is indented under subclass 837. Subject matter
wherein a first reflector is positioned behind an active
antenna and a second reflector (screen reflector) is
positioned in front of the antenna, the second reflector
redirecting diverging rays emanating from the active antenna
in transmission, and shielding the active antenna in
reception from undesired energy when coming from a direction
other than that of the desired received energy.
(1) Note. Usually the subject matter in this subclass
includes a parabolic reflector with a transmitting active
antenna at its focus and a screening reflector on the side of
the transmitting antennas opposite from the parabolic
reflector. The screening reflector directs the diverging
energy radiated from the source towards the parabolic
reflector, which redirects this energy in a parallel path.
(2) Note. The second reflector (screen reflector) referred
to in the definition above is not a director. See subclass
833 above for antennas with directors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
840 for active antennas with parabolic reflectors.
841 for antennas with shields.
Subclass:
839
This subclass is indented under subclass 834. Subject matter
wherein means are provided permitting relative movement or
adjustment between the reflector or a part thereof and the
active antenna or a part thereof under operative conditions.
(1) Note. Where means is provided for moving the active
antenna and reflector relative to each other, as a handle,
motor, gearing or other means for transmitting motion, to
change the directive pattern of the antenna for scanning,
sweeping or orienting in addition to the means permitting
such motion, classification is not here but in subclass 761,
above. However, where means are provided for moving the
active antenna relative to the reflector, in addition to mere
means permitting such motion, for purposes other than those
recited in subclass 761, classification is in this subclass
(839) as opposed to subclass 761.
(2) Note. Where an antenna and reflector are claimed with
means to fold or collapse either or both when not in
operation, classification is not herein but in subclass 834,
above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
361 for directive antennas having a reflector together with
means for moving the active antenna and reflector relative to
one another for scanning, sweeping or orienting. See also
(1) Note, above.
880 for antennas or reflectors with adjustable or
collapsible supports, and particularly subclass 882 for
antennas or reflectors with a pivoted or rotatable support
for the antenna or reflector.
915 for reflectors, per se, which are collapsible, foldable
or adjustable.
Subclass:
840
This subclass is indented under subclass 834. Subject matter
wherein the reflector presents a reflecting surface having a
parabolic contour in at least one plane, and the active
antenna is positioned at the focus of the parabola.
(1) Note. The reflector may be a sheet, screen, or group of
rods, provided the parabolic contour is present. It may
include reflecting portions which are not parabolic.
SEE OR SEARCH THIS CLASS, SUBCLASS:
775 779 and 781+, for wave guide type antennas with a
reflector in which the reflector may be of the parabolic
type.
815 817 and 818+, for center-fed balanced doublet type
antennas with a reflector in which the reflector may be of
the parabolic type.
Subclass:
841
This subclass is indented under subclass 700. Subject matter
wherein a conductive or low reluctance structure, such as a
wire, plate, or grid, is combined with the antenna to reduce,
as by dissipation through a resistance or by conduction to
ground, undesired radiation, or electric or magnetic fields,
which are directed toward the antenna from an external
source, or which emanate from the antenna.
(1) Note. While a shield may modify the radiation of an
antenna as does the reflector, in the case of the shield the
energy is essentially absorbed rather than returned to space.
Likewise in the case of the ground, as in subclass 846 below,
the reflecting function may also be performed.
(2) Note. For classification in this subclass, the shield
must cooperate with the antenna in its operative position. A
mere sheath for an antenna when not in use is not classified
in this subclass, but in subclasses 872 and 889.
SEE OR SEARCH THIS CLASS, SUBCLASS:
702 for antennas combined with radio cabinets which may
include shielding.
705 709+ and 711+, for antennas with aircraft, watercraft and
vehicle structure respectively, where the antennas may be
shielded by such structure.
719 for antennas buried underground or submerged under
water.
829 for fractional, multiple or full wave linear type
antennas with a decoupling shield.
851 for antennas with a coupling network or impedance in the
leadin, together with a shield for such network or
impedance.
872 for antennas with a housing or protective covering.
905 for antennas combined with shielded transmission lines.
906 for antennas combined with shielded electrical
connectors.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 35 for
shielded or screened electrical conductors and insulators.
307, Electrical Transmission or Interconnection Systems,
subclass 91 for electrical transmission systems with
shielding means, generally.
455, Telecommunications, subclass 271 and 283+ for radiation
prevention and noise elimination in the antenna circuits of
radio receivers.
Subclass:
842
This subclass is indented under subclass 841. Subject matter
wherein the antenna is of the loop type as defined in
subclass 866, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
741 for high frequency type loop antennas which may involve
shields.
866 for loop type antennas, per se.
SEE OR SEARCH CLASS:
336, Inductor Devices, particularly 84 and the search notes
thereunder for shielded electrical inductor devices.
Subclass:
843
This subclass is indented under subclass 700. Subject matter
wherein the claims recite the active antenna or portion,
section, or part thereof as having a dimension which is a
fractional part or multiple (including unity) of the
operating wave length of the antenna.
(1) Note. Subject matter involving spiral, helical and
sinuous types of antennas, where such antennas are claimed to
have a particular operating wave length dimension, are
classified herein. An example of such subject matter is a
helix having a pitch or circumference which is an appreciable
portion of a wave length. This is the residual subclass for
antennas having a particular wave length dimension. Special
types of antennas, which may also involve a particular
operating wave length for the active antenna, are classified
with their particular type of antenna, as for example,
subclasses 772+ for wave guide type antennas, subclasses 793+
for balanced doublets, and subclasses 825+ for linear type
antennas of a particular electrical length.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723 for single linear antennas having an adjustable length
for tuning.
741 for high frequency loops having an appreciable wave
length dimension.
749 for antennas of a particular wave length dimension with
lumped reactance for loading.
772 for wave guide type antennas which may have an
appreciable wave length dimension.
793 for balanced doublets having an appreciable wave length
dimension.
825 for fractional, multiple or full wave linear type
antennas.
Subclass:
844
This subclass is indented under subclass 700. Subject matter
including a plurality of antennas spaced a physical distance
apart, which distance is an appreciable part of a wave length
or number of wave lengths at the operating frequency of the
antennas; or including a plurality of antennas combined with
structure which of necessity results in the antennas being
spaced a physical distance apart, which distance is an
appreciable part of a wave length or number of wave lengths
at the operating frequency of the antennas.
(1) Note. For classification in this subclass the claims
must either recite the antennas being spaced a particular
part of a wave length or number of wave lengths at the
operating frequency; or spaced a particular distance, which
from the specification would establish the spacing of the
antennas as a particular part of a wave length or number of
wave lengths at the operating frequency; or the antennas
being connected, supported or separated by structure which
establishes a particular wave length spacing of the
antennas.
(2) Note. Patents claiming a plurality of antennas
connected by fractional or multiple wave length transmission
lines or other structures which would constitute electrical
coupling are not classified in this subclass unless they also
claim the physical spacing of the antennas, but are found in
subclasses 852 and 853+.
(3) Note. A mere recitation of the relationship between the
spacings of respective antennas of an array (e.g., increasing
distances or unequal distances between antennas) is not
sufficient for classification in this subclass. For
classification here, the particular spacing in operating wave
length between two antennas is necessary.
SEE OR SEARCH THIS CLASS, SUBCLASS:
725 for plural separate diverse type antennas, which may be
spaced a particular wave length apart.
770 for plural slot type antennas, whose slots may be spaced
a particular wave length apart.
776 for plural wave guide type antennas, which may be spaced
a particular wave length apart.
794 796, 797+, 799+, and 810+, for balanced doublet antennas
which may be spaced a particular wave length apart.
824 for planar type high frequency arrays.
826 for plural fractional, multiple, or full wave linear
antennas, which may be spaced a particular wave length
apart.
835 for plural active antennas with reflectors.
852 and 853+, for plural antennas with a coupling network or
impedance in the leadin. See also (2) Note, above.
867 for plural loop antennas.
879 for plural separate antennas with a support.
893 for plural antennas, including those of no particular
type, and having no particular spacing or coupling. Antennas
in particular patterns or arrangements are classified here.
See also the Search Notes to this subclass.
SEE OR SEARCH CLASS:
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigation), subclasses 1-205 for
directive signaling systems which may involve plural antennas
spaced a particular wavelength apart.
Subclass:
845
This subclass is indented under subclass 700. Subject matter
wherein the antenna has a connection to ground at some point
on the antenna physically or electrically spaced on the
antenna from the point of connection of the transmitter or
receiver leadin to the antenna.
(1) Note. This ground connection is in addition to any
ground or reference potential which the transmitter or
receiver leadin may provide.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731 for antennas with energy absorbing means remote from the
feed line coupling, which means may be connected to ground.
739 for antennas connected to ground through a resistance at
the end electrically remote from the lead-in terminals.
846 for antennas with grounding structure in general.
Subclass:
846
This subclass is indented under subclass 700. Subject matter
wherein the active antenna is combined with structure
including ground or structure most closely associated with or
simulating ground, and such structure being connected to the
terminal of the signal receiver or source opposing the active
antenna terminal (i.e., having the signal receiver or source
interposed between the active antenna and this structure),
for establishing a reference potential level for operating
the active antenna.
(1) Note. For classification herein significant details of
the ground structure must be claimed. The mere recitation of
a ground or ground terminal or of a switch to connect to
ground is not sufficient to bring such subject matter within
this subclass.
(2) Note. The ground structures may radiate signal energy
by reflection, as for example, where such a structure
functions as an image antenna. But as distinct from
reflectors in subclasses 834+ and 912+ the ground structure
bears a significant potential relationship with the antenna,
while a reflector has no such significant potential
relationship.
(3) Note. This grounding structure is usually used with
unbalanced or capacity antennas, as opposed to balanced
antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
705 709+ and 711+, for antennas with aircraft, watercraft and
vehicles, respectively, wherein these latter structures may
constitute a ground or counterpoise.
719 for underground or underwater antennas.
829 for fractional, multiple or full wave linear antennas
with grounding structure, including counterpoises.
834 and 912+, for antennas with reflectors and reflectors,
per se. See also (2) Note, above.
841 for antennas with an electrical shield.
845 for antennas with a ground connection spaced from the
feed line connection.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 6 for earth
grounds for conductors.
Subclass:
847
This subclass is indented under subclass 846. Subject matter
wherein the structure most closely associated with ground is
insulated from or capacitively coupled to the natural ground
to aid in the function of the natural ground, particularly
where variations or limitations of the characteristics of the
natural ground interfere with its proper function.
(1) Note. Antenna counterpoises, which are insulated or
capacitively coupled to ground, are classified herein.
Subclass:
848
This subclass is indented under subclass 846. Subject matter
wherein the grounding structure for the antenna includes
conductive structure used in place of the earth and which
grounding structure is distinct from the earth.
SEE OR SEARCH THIS CLASS, SUBCLASS:
705 and 709+, for antennas combined with devices suspended
in air or water, respectively, in which the device may serve
in whole or in part as an artificial ground.
711 for antennas combined with vehicles wherein the vehicle
may form or is part of an artificial ground.
829 for multiple, fractional, or full wave linear type
antennas with a ground plane.
Subclass:
849
This subclass is indented under subclass 846. Subject matter
wherein the natural earth ground is modified by the addition
of structure or material in direct contact with or within the
earth to modify or maintain the radiation reflecting or
absorbing characteristics or electrical conducting properties
of the natural ground.
SEE OR SEARCH THIS CLASS, SUBCLASS:
719 for underground or underwater type antennas.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 6 for earth
grounds for conductors.
Subclass:
850
This subclass is indented under subclass 700. Subject matter
wherein an active antenna is combined with a passive network
(which may be resistive, inductive, or capacitive or any
combination thereof) for transmitting the signal energy
between the active antenna and a source or receiver of such
signal energy.
(1) Note. Where the impedance network is located at the
junction of the leadin and the antenna and the function of
such impedance is loading or tuning the natural frequency of
the antenna, classification is in subclasses 745+ or 749+.
However, where the network is so located and the function is
coupling, and there is no loading or tuning of the natural
resonant frequency of the antenna classification is in this
subclasses (850+ ) as opposed to subclasses 745+ or 749+.
See subclasses 745+ and 749+ and the Notes thereto for
definitions of antennas with tuning and loading,
respectively.
(2) Note. Mere recitation of a transmission line or lead-in
wire joining the antenna to its signal source or load without
any significant electrical characteristics is not sufficient
for classification here. Such subject matter, including
structural characteristics of the transmission line, is
classified in subclass 905, below.
(3) Note. The combination of a coupling network as defined
above with an antenna network recited by name only is
sufficient for classification in this subclass as opposed to
Class 333, Wave Transmission Lines and Networks, where
coupling networks, per se, as there defined are classified.
(4) Note. Combinations of an antenna, coupling network, and
a receiver or transmitter are classified in this and indented
subclasses, unless an active element or network, or
significant structure of a transmitter or receiver is
claimed. For definitions of active element or significant
structure see (3) Note under subclass 858, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
722 for antennas having filters in the active antenna.
731 and 739+, for antennas having energy absorbing means
remote from the feed line coupling or having feed back
coupling.
745 for antennas with variable reactance for tuning. See
also (1) Note, above.
749 for antennas having lumped inductance or capacity for
loading. See also (1) Note, above.
771 for plural slot type antennas with wave guide coupling.
814 816 and 820, for balanced doublets having a coupling
network or impedance in the leadin.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
pertinent subclasses, for miscellaneous electrical
transmission or interconnection systems.
323, Electricity: Power Supply or Regulation Systems,
pertinent subclasses, for voltage magnitude and phase control
systems.
333, Wave Transmission Lines and Networks, 1 for plural
channel systems involving coupling networks, and subclasses
24+ for coupling networks, per se.
Subclass:
851
This subclass is indented under subclass 850. Subject matter
wherein the coupling network, or the leadin associated with
the coupling network includes structure or is arranged for
minimizing undesired radiation effects to or from the
coupling network or the leadin.
(1) Note. Where the corrective, radiation suppression means
includes significant elements of a transmitter or receiver,
or involves circuit connections to such elements other than
the antenna and coupling and/or the transmission line
thereto, classification is in Class 455, subclasses 114, 271
and 283+ for the transmitter and receiver respectively.
(2) Note. Where shielding is directly associated with the
active antenna to modify its radiation or reception
classification is not here, but in subclass 841. Where the
shielding or other radiation suppressing means is associated
with a transmission line or electrical connector,
classification is in subclasses 905 and 906, respectively.
(3) Note. A mere filter in the coupling network which
discriminates against the passage of electrical energy
through the coupling network, although such energy causes or
may be caused by undesired radiation, is not classified in
this subclass, but in subclass 850 and other indented
subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
782 for wave guide type antennas with means reducing
reradiaton into the active antenna.
789 for antennas located within conductive apertured
housings or walls.
790 for antennas wherein an active sleeve surrounds the feed
line.
829 for antennas of significant electrical length with
decoupling shields.
841 for antennas with shields for such antennas. See (2)
Note, above.
905 for antennas combined with transmission lines which may
involve the suppression of radiation interference to or from
such lines. See (2) Note, above.
906 for antennas combined with electrical connectors which
may involve the suppression of radiation interference to or
from such electrical connectors. See (2) Note, above.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 32 and 50+ for
anti-inductive structures including shielding means.
307, Electrical Transmission or Interconnection Systems, 89
for miscellaneous electrical systems having anti-induction
means or means to prevent undesired coupling to other
systems.
315, Electric Lamp and Discharge Devices: Systems, subclass
85 for electric lamp and discharge device systems with
electromagnetic wave radiation preventing or shielding
means.
333, Wave Transmission Lines and Networks, subclass 12 for
wave transmission systems having transmission line inductive
or radiation interference reduction means.
336, Inductor Devices, 84 for inductor devices with electric
and/or magnetic shielding means.
455, Telecommunications, subclass 271, for coupling of an
antenna to a detector, mixer, or amplifier in a radio
receiver for minimizing radiation effects.
Subclass:
852
This subclass is indented under subclass 850. Subject matter
including a plurality of interrelated signal paths of which
the passive coupling network is at least a part, and wherein
the circuit elements of this arrangement are positioned and
proportioned to reduce wave reflections arising from the
interrelation of the signal paths.
(1) Note. Most of the patents in this subclass disclose a
branched coupling network and an antenna joined by the
coupling network to a plurality of transmitters or receivers,
or a branched coupling network and a plurality of antennas
joined to a transmitter or receiver. The branched coupling
networks present impedances at the junction to substantially
eliminate the reflected wave energy caused by the junction,
or one or more impedance elements are provided which are
constructed or proportioned to substantially eliminate the
reflected wave energy caused by the branched circuit coupling
network. See (1) Note under subclass 858 for classification
of radiant energy systems involving duplexing.
SEE OR SEARCH THIS CLASS, SUBCLASS:
776 for wave guide type antennas with branched feed guide or
line which may involve impedance matching.
814 and 816, for plural balanced doublet antennas with
coupling which may involve impedance matching.
822 for balanced doublet antennas with impedance matching.
860 for antennas coupled by a single path to a source or
load involving impedance matching.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 1, and
particularly subclasses 124+, for plural channel wave
transmission systems involving impedance matching; and
subclasses 32+ for single channel coupling networks involving
impedance matching.
Subclass:
853
This subclass is indented under subclass 850. Subject matter
including a plurality of antennas and a passive coupling
network or a combination of such networks, the antennas being
directly connected to such network or networks.
SEE OR SEARCH THIS CLASS, SUBCLASS:
100 for directive, radiant energy signaling systems, which
may involve plural antennas with coupling.
776 for plural wave guide type antennas which may involve
coupling.
814 and 816, for plural doublet type antennas with
coupling.
852 for plural antennas with coupling networks, which also
involve impedance matching.
893 and the Search Notes thereunder for plural antennas
generally which may involve coupling networks.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 1 for plural
channel wave transmission systems which may be coupled to
plural antennas. See also the search notes thereunder.
Subclass:
855
This subclass is indented under subclass 853. Subject matter
wherein the antennas are of the loop type as defined in
subclass 866, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
726 and 728, for plural diverse type antennas involving a
loop antenna.
742 for plural high frequency loop type antennas which may
involve coupling.
867 for plural loop type antennas.
Subclass:
856
This subclass is indented under subclass 850. Subject matter
wherein the active antenna forms the secondary or primary
winding of a transformer magnetically coupled from a primary
or to a secondary winding for connecting from or to a signal
source or receiver, respectively.
(1) Note. A mere transformer winding in series with the
antenna is not sufficient for such subject matter to be
classified herein. The portion of the antenna which directly
radiates or receives the radiant signal energy itself must
form a substantial portion of the primary or secondary
winding involved in the coupling to or from a signal receiver
or source to be classified herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
857 for antennas having coupling to spaced points thereon
wherein such coupling may be by transformer means.
866 for loop type antennas.
SEE OR SEARCH CLASS:
336, Inductor Devices, pertinent subclasses for transformer
structure.
Subclass:
857
This subclass is indented under subclass 850. Subject matter
wherein the coupling network includes a plurality of
electrical paths, which may include a balanced path,
connected to physically spaced points on the active portion
of the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731 and 739+, for antennas with energy absorbing means
remote from the feed line coupling or with feedback coupling
which may be coupled to plural points of the active portion
of the antenna.
743 for high frequency loop type antennas which involves
coupling to spaced points on the loop.
793 for dipole antennas which may involve connections to
spaced points on the active portion of the dipole.
858 for antennas having a coupling network including plural
paths coupled respectively to more than one termination.
Subclass:
858
This subclass is indented under subclass 850. Subject matter
wherein the passive network has one termination to which an
antenna is connected, and has in addition a plurality of
distinct terminations, adapted to be connected to a plurality
of transmitters and/or receivers; the coupling network
providing a branched electrical path from the antenna
termination to the other terminations.
(1) Note. Subject matter involving the combination of an
antenna, transmitter and receiver, even in the event the
transmitter and receiver are claimed by name only, are not
classified in the subclass but will be found in Class 370,
subclasses 276+ where the systems are duplexing systems
(e.g., adapted for simultaneous transmission and reception of
messages): otherwise, classification is in Class 455,
Telecommunications, appropriate subclasses.
(2) Note. Combinations of an antenna, coupling network and
a plurality of receivers or transmitters are classified in
this subclass unless an active element or network, or
significant structure of a transmitter or receiver is
claimed. For definitions of active element or network, or
significant structure, see (3) Note below. In such cases,
where in addition the combination is adapted for simultaneous
transmission or reception of plural messages (e.g.,
multiplexing) classification is in this class (370),
appropriate subclasses, otherwise, classification falls with
transmitters in Class 455, subclasses 91+ or with receivers
subclasses 30+.
(3) Note. An active element or network is defined for
purposes of classification as an element or network whose
energy output is modified due to the presence of a source of
energy in the element or network (other than the mere signal
energy which passes through the network), or an element or
network in which the energy output from a source of energy is
controlled by the signal input. For purposes of
classification, those portions of the receiver or transmitter
connected in immediate consecutive relationship with what may
be termed the coupling network proper are not considered to
be significant receiver or transmitter structure unless they
contain an active element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
175 and 200+, for duplexing and multiplexing radiant energy
communication systems, respectively. See also (1) Note and
(2) Note, above.
852 for a single antenna with a plural path coupling
network, which also has impedance matching.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, particularly 1
for plural channel wave transmission systems. See also the
Search Notes under subclass 1 of Class 333.
455, Telecommunications, 132 for radio receivers which may
involve antennas with coupling to plural receivers.
Subclass:
859
This subclass is indented under subclass 850. Subject matter
wherein the passive coupling network includes four terminals,
one pair of which are for connection to the antenna and the
other pair for connection to a source or receiver of signal
energy; the network impedance across one pair of terminals
being symmetrical and the network impedance across the other
pair of terminals being unsymmetrical with respect to a given
potential plane (e.g., ground), these impedances being
effective to convert symmetrical potential applied at the
symmetrical pair of terminals to unsymmetrical potential at
the other pair of terminals or vice versa.
SEE OR SEARCH THIS CLASS, SUBCLASS:
814 and 816, for plural balanced doublets which may be
connected to an unbalanced source or load.
821 for balanced doublets connected to an unbalanced source
or load.
865 for balanced antennas with coupling for a balanced
source or load.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, subclass 25 for
balanced to unbalanced coupling networks, per se.
Subclass:
860
This subclass is indented under subclass 850. Subject matter
wherein the passive coupling network includes one or more
impedance elements constructed or proportioned to
substantially eliminate the reflected wave energy between the
antenna and the receiver or signal energy source, caused by
impedance differences.
(1) Note. Only networks matching a single antenna to a
single frequency, source or load are classified in this
subclass. Subject matter involving plural antennas matched
to a single source or load is classified in subclasses 853+
above, and subject matter involving a single antenna matched
to a plural source or load is classified in subclass 858
above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
745 for antennas with variable reactance for tuning such
antennas which may involve impedance matching.
822 for balanced doublets with an impedance matching
coupling network.
852 for plural path antennas with coupling circuits with
impedance matching.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 32 and 124+ for
wave transmission lines and networks involving impedance
matching or impedance matching networks, per se.
Subclass:
861
This subclass is indented under subclass 860. Subject matter
wherein at least one of the impedance elements has an
adjustable electrical characteristic.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723 for single adjustable length electrically long linear
antennas.
745 for antennas with variable reactance for tuning.
750 for antennas with adjustable reactance for loading.
823 for adjustable length balanced doublets.
854 for plural antennas with an adjustable coupling
network.
868 for loop type antennas of adjustable configuration.
Subclass:
862
This subclass is indented under subclass 860. Subject matter
under the definition of ... in which at least one of the
elements of the impedance matching network has distributed
electrical parameters.
SEE OR SEARCH THIS CLASS, SUBCLASS:
782 for wave guide antennas with means reducing reradiation
into the active antenna.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 33 for impedance
matching coupling networks having long line elements.
Subclass:
863
This subclass is indented under subclass 862. Subject matter
wherein the distributed parameter electrical element of the
impedance matching network lies along the path of wave
propagation through the network and has a physical dimension
progressively increasing or decreasing along the path of
propagation to result in a corresponding change in electrical
parameters of the distributed parameter element.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, subclass 34 for
impedance matching networks in general with a tapered long
line element.
Subclass:
864
This subclass is indented under subclass 862. Subject matter
wherein the impedance matching network element having
distributed electrical parameters lies along the path of wave
propagation through the network and is an odd integral number
(including unity) of quarter-wave lengths long.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, subclass 35 for
impedance matching networks in general having a quarter-wave
transformer.
Subclass:
865
This subclass is indented under subclass 850. Subject matter
wherein the coupling network and antenna are electrically
balanced.
(1) Note. In the balanced doublets of subclasses 793+, the
masses are not only electrically balanced; but also are
substantially alike and are symmetrically disposed on
opposite sides of the lead-in terminals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731 especially subclasses 733 and 735, for traveling wave
type antennas which may be balanced.
740 for balanced antennas with a terminating resistance at
the open end.
741 for high frequency loop type antennas which may be
balanced.
745 especially subclasses 747 and 748, for antennas with
variable reactance for tuning.
791 and 792, for sleeve type antennas which may be
balanced.
814 816 and 820, for balanced doublets with coupling
networks. See (1) Note above.
829 for fractional, multiple, or full wave linear type
antennas with grounding structure, including counterpoises.
859 for antennas with balanced to unbalanced coupling
networks.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 4 and 25+, for
wave transmission networks involving balanced circuits.
Subclass:
866
This subclass is indented under subclass 700. Subject matter
including a coil of one or more turns adapted to be connected
at its ends to a pair of lead-in terminals, and further
adapted to establish in or receive from space radio wave
energy together with a frame for establishing a particular
shape or pattern of shapes for the coil, or the coil has
sufficient rigidity to establish a shape without the frame.
(1) Note. The loops in this and the indented subclasses
form with the source or load circuitry connected thereto a
series circuit, as opposed to the antennas of subclass 895 in
which a single terminal feeds to or from the antennas to
leave an end electrically free.
(2) Note. As between loop antennas and the inductor devices
of Class 336, the claiming of an antenna by name only or the
recitation of structure peculiar to antennas would classify
the patents in this subclasses (866+). If the disclosure is
a loop antenna, but the claims merely recite an inductor
device, classification is in Class 336.
(3) Note. Loop antennas wherein the coil has a particular
shape or configuration are classified in this subclass
(866).
SEE OR SEARCH THIS CLASS, SUBCLASS:
726 and 728, for plural separate diverse type antennas
including a loop antenna.
732 for loop antennas having energy absorbing means remote
from the feed line coupling.
741 for high frequency type loops.
748 for loop type antennas with variable reactance for
tuning.
764 for loop antennas having means for scanning, sweeping or
orienting the antennas in rotary or oscillatory motion.
767 for slot type antennas.
788 for loop antennas including magnetic material.
803 for folded dipoles.
842 for loop type antennas with an electrical shield.
855 for plural loop antennas with a coupling network or
impedance in the leadin.
895 for spiral or helical type antennas. See also (1) Note
above.
SEE OR SEARCH CLASS:
246, Railway Switches and Signals, subclass 8 for inductive
type railway signaling.
267, Spring Devices, particularly subclass 69 for coil
spring devices.
336, Inductor Devices, see (2) Note, above.
342, Communications: Directive Radio Wave System and Devices
(e.g., Radar, Radio Navigation), subclasses 1-205 for
directive radio wave energy system which may include a loop
antenna as an element thereof.
Subclass:
867
This subclass is indented under subclass 866. Subject matter
including a plurality of distinct coils or windings, or
including one or more taps on a coil or winding to vary the
effective number of coil or winding turns; or including a
plurality of loop type antennas as defined in subclass 866
above.
(1) Note. A coil or winding is composed of one or more
turns of an electrical conductor. In a plurality of such
coils or windings there is also one or more turns of an
electrical conductor, but there is a discontinuity in the
turns to establish discrete groups or sets of turns.
SEE OR SEARCH THIS CLASS, SUBCLASS:
726 and 728, for plural separate diverse type antennas
including a loop antenna.
729 for plural diverse active antennas using the same
element which may involve a loop antenna.
742 for plural high frequency type loops.
855 for plural loop antennas with a coupling network or
impedance in the leadin.
SEE OR SEARCH CLASS:
336, Inductor Devices, especially 75, 115+, 137+, 170+, 172,
173+, 180+, 188, 192, 195, and 220, for plural or tapped
inductor coils or windings.
Subclass:
868
This subclass is indented under subclass 866. Subject matter
wherein a coil or winding and/or the frame of a single loop
type antenna is formed of flexible or relatively movable
parts to permit change in the shape, area, or length of the
coil or winding.
(1) Note. The change in shape, etc.., must be within a
single loop antenna for classification in this subclass. If
a plurality of loop antennas are relatively movable to
provide a change in overall shape, etc.., classification is
in subclass 867, above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
867 for loop antennas whose effective coil length is
adjusted by taps. See also (1) Note, above.
871 for loop antennas with collapsible or foldable frames.
880 for antennas with an adjustable or collapsible support.
SEE OR SEARCH CLASS:
336, Inductor Devices, subclass 15, 20 and 137+ for inductor
devices adjustable in shape or length.
Subclass:
869
This subclass is indented under subclass 866. Subject matter
wherein a support for the loop antenna is provided, which
permits the antenna to be rotated about at least one axis.
(1) Note. For classification in this subclass the
combination of rotatable support and loop antenna must
include significant loop antenna structure. Mere designation
of the antenna as a loop antenna or the like is not
sufficient for classification here, but rather in Class 248.
Class 248 would also receive subject matter where the support
structure which is claimed is of general utility.
(2) Note. Where a combination is claimed as in the (1) Note
above, but the support has insulating or electrical connector
structure associated therewith, classification would be in
Class 174.
SEE OR SEARCH THIS CLASS, SUBCLASS:
702 for loop antennas which may be rotatably mounted on
radio cabinets.
764 for loop antennas which may be rotatably supported for
scanning, sweeping or orienting.
882 for antennas in general with rotatable supports. See
also the Search Notes under this subclass (882).
SEE OR SEARCH CLASS:
248, Supports, see (1) Notes above. See also the external
search notes under subclass 882 of Class 343 for supporting
structure which is applicable also to loop antennas.
Subclass:
870
This subclass is indented under subclass 866. Subject matter
wherein the loop type antenna is combined with an electrical
connector or terminals whereby the winding of the loop may be
connected or coupled to other apparatus.
(1) Note. For classification in this subclass the
combination of the loop type antenna and connector or
terminal must include significant loop antenna structure.
Designation of the antenna only broadly as a loop antenna or
the like is not sufficient for classification here, but
rather classification would be in Class 174, or Class 439.
SEE OR SEARCH THIS CLASS, SUBCLASS:
876 for switching between antennas and lines which include
connector or terminal structure.
867 for loop antennas with a tapped winding.
906 for antennas in general combined with an electrical
connector.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, pertinent
subclasses for conductor and insulating structure which may
be used for connecting loop antennas with associated
apparatus. See also (1) Note, above.
439, Electrical Connectors, pertinent subclasses for
electrical connectors, which may be used for connecting loop
antennas with associated apparatus. See also (1) Note,
above.
Subclass:
871
This subclass is indented under subclass 866. Subject matter
wherein the frame is composed of relatively movable parts or
is of flexible material so that the loop may be folded or
collapsed to occupy less space as when it is not in use.
(1) Note. Loop frames which may be readily disassembled are
classified in subclass 866 above. For classification in this
subclass (871) the loop frame must remain substantially in
one piece when folded or collapsed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
868 for loop antennas having frames of relatively movable
parts to adjust the loop coil configuration.
880 for antennas having adjustable or collapsible supports,
and particularly subclass 881 for foldable supports.
915 for reflectors or directors which are collapsible,
foldable or adjustable.
SEE OR SEARCH CLASS:
211, Supports: Racks, particularly 104, 118 and 195+ for
foldable or collapsible article supports and racks.
248, Supports, particularly subclass 121 for stands and
brackets and subclasses 200+ for brackets which may involve
collapsible or foldable frames.
336, Inductor Devices, 196, and particularly subclass 208,
for inductor coils which may involve collapsible or foldable
frames for such coils.
Subclass:
872
This subclass is indented under subclass 700. Subject matter
wherein a unitary covering or housing is provided which
substantially surrounds the antenna in operation, and which
freely passes radio waves so as not to interfere materially
with the transmission or reception of the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
702 for antennas combined with a radio cabinet.
719 for underground or underwater type antennas, which may
have a casing or covering.
784 for closures in wave guide type antennas or horns.
789 for antennas located within a conductive apertured
wall.
841 for antenna shields.
889 for rod type antennas retractable into a support.
SEE OR SEARCH CLASS:
73, Measuring and Testing, subclass 431 for instrument
casings.
174, Electricity: Conductors and Insulators, particularly 17
and 50+ for boxes and housings peculiarly adapted for
electrical devices.
220, Receptacles, particularly 2.1 for receptacles for
electrical devices in general, where no specific electrical
features are claimed.
312, Supports: Cabinet Structure, particularly subclass 7,
for radio type cabinets which may be used to house antennas.
315, Electric Lamp and Discharge Devices: Systems, subclass
34 for integral structural combinations of antennas and
discharge devices.
324, Electricity: Measuring and Testing, subclass 156 for
casings for electrical measuring instruments.
336, Inductor Devices, particularly 90 for casings and
housings for inductor devices.
361, Electricity: Electrical Systems and Devices, 605 and
641+ for housings for the structure of electrical
switchboards or plural electrical components.
428, Stock Material or Miscellaneous Articles, appropriate
subclasses, for a stock material product in the form of a
single or plural layer web or sheet which may embody a
material that inherently freely passes electromagnetic
waves.
455, Telecommunications, 280 for radio receivers which
include antennas and housings for such radio receivers and
antennas.
D14, Recording, Communication, or Information Retrieval
Equipment, particularly 188 which includes radio receivers,
tuners, etc.. generally and subclasses 230+ which includes
antennas and components thereof.
Subclass:
873
This subclass is indented under subclass 872. Subject matter
wherein the antenna is embedded or potted in, or coated by a
protective cover or support.
SEE OR SEARCH CLASS:
106, Compositions: Coating or Plastic, pertinent subclasses
for coating or plastic compositions in general.
174, Electricity: Conductors and Insulators, particularly
24, 50+ and 110+ for insulated conductors and conductor
housings.
336, Inductor Devices, subclass 96 and 205, for inductor
devices having potted and embedded windings, respectively.
Subclass:
874
This subclass is indented under subclass 700. Subject matter
including a tower or mast which transmits or receives radio
waves; the tower or mast having structure which facilitates
this transmission or reception of radio waves, or the tower
or mast serving, in addition, as a support for other radio
wave radiating or receiving structure.
(1) Note. A tower antenna herein comprises a metallic
elongated structure of substantial height, generally of
lattice type and constructed of component metallic elements
such as I beams or girders, and is adapted to radiate or
receive radiations of radio wave energy.
(2) Note. A mast antenna is usually a substantially solid,
hollow, or built up pole-like element of metallic composition
capable of radiation; and is distinguished from the rod type
antennas of subclass 900 which are normally of negligible
mass and relatively short, in that the masts of this subclass
have appreciable weight and height and are adapted
structurally to support such weight.
SEE OR SEARCH THIS CLASS, SUBCLASS:
715 for rod type antennas supported by a vehicle body.
723 for single adjustable length electrically long linear
antennas.
825 and 843, for mast or tower type antennas of appreciable
electrical length or dimension, respectively.
890 for antenna supports of the post, standard or tower
type.
896 for cage or hollow post type antennas.
900 for rod type antennas, per se.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), 720 for a residual
rigid elongated unit not defining an electrical detail for
Class 343.
174, Electricity: Conductors and Insulators, particularly
subclass 45 for towers, poles or posts for supporting
overhead conductors.
Subclass:
875
This subclass is indented under subclass 874. Subject matter
wherein the antenna mast or tower is composed of multiple
discrete vertical sections.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), 720 for residual
rigid elongated structure not defining any electrical feature
for Class 343.
Subclass:
876
This subclass is indented under subclass 700. Subject matter
including an antenna and a switch for electrically connecting
the antenna selectively to two or more lines, or including
two or more antennas and a switch for connecting a line
selectively to these antennas, or including a plurality of
antennas and a switch for making selective connections among
these antennas and a plurality of lines.
SEE OR SEARCH THIS CLASS, SUBCLASS:
768 for slot type antennas with periodic control of the slot
or coupling.
777 for plural wave guide type antennas with control of the
individual antenna.
778 for plural wave guide type antennas with phasing means.
814 for plural doublets with coupling networks.
854 for plural antennas with coupling means having
periodically varied control.
858 for a single antenna coupled to plural leadins.
904 for antennas combined with switches.
SEE OR SEARCH CLASS:
200, Electricity: Circuit Makers and Breakers, particularly
1, 19.01+, 51.02+, 51.05+ for plural circuit switches.
307, Electrical Transmission or Interconnection Systems,
particularly subclass 23, 38+, 64+, 80+, 85+, 98+, and 112+
for miscellaneous electrical distribution systems which
include switching.
333, Wave Transmission Lines and Networks, 101 for wave
transmission branch systems having switching between
branches.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 106 for switches of the electromagnetic
type adapted to complete a plurality of circuits.
340, Communications: Electrical, particularly 825 for
miscellaneous electrical communication systems which may
involve switching.
439, Electrical Connectors, particularly subclass 18 for
electrical connectors which may connect and disconnect
multiple circuits.
455, Telecommunications, subclass 132 and 277.1+ for radio
receiver diversity systems which may include this type of
switching.
Subclass:
877
This subclass is indented under subclass 700. Antennas
together with a reel on which the antenna may be wound.
(1) Note. The combination of an antenna, recited by name
only, or the recitation of structure which adapts the antenna
to winding such as the term "flexible wire", and a reel is
not classified in this subclass, If to this combination is
added terminal or connecting means permitting transmission of
electrical energy to or from the antenna, classification is
elsewhere. If structure is recited to indicate the length of
wire unwound from the reel classification is elsewhere. See
the Search Class notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
707 for aircraft combined with trailing type antennas.
903 for telescoping rod type antennas actuated by a flexible
rod, which may be wound on a reel.
SEE OR SEARCH CLASS:
33, Geometrical Instruments, particularly 732 for means to
indicate and measure the length of antenna unwound, provided
no significant antenna structure is recited. See also (1)
Note, above.
114, Ships, subclass 311 for drags and sea anchors.
188, Brakes, 378 for vibration dampers which use the inertia
of a damping mass to dissipate motion; and subclass 381 for
dampers using friction between elements to dissipate motion.
191, Electricity: Transmission to Vehicles, especially 12.2
for reels on which flexible conductors wound for transmitting
electrical energy. See also (1) Note, above.
242, Winding, Tensioning, or Guiding, 370, particularly
subclasses 390.2, 390.3, and 917, for the combination of an
antenna, recited by name only, or the recitation of structure
which adapts the antenna to winding such as the term
"flexible wire", and a reel. See also (1) Note, above.
244, Aeronautics, subclass 1 for nominal trailing antennas.
254, Implements or Apparatus for Applying Pushing or Pulling
Force, 266 for apparatus for hauling or hoisting a load
including a driven drum for pulling on a cable attached to
the load.
Subclass:
878
This subclass is indented under subclass 700. Antennas
including structure for maintaining the antennas or parts
thereof in a fixed position or path of movement (adjustable)
with respect to some other body or the earth.
(1) Note. For classification of the combination of an
antenna and a support in this and the indented subclasses,
there must be recited some significant antenna structure,
i.e., structure that contributes electrically to the
transmission of the signal between the receiver or
transmitter and space through the antenna. The combination
of an antenna claimed by name only and a support therefor
claimed in detail is classified in Class 248. If in addition
insulating features are recited classification is in Class
174, even though the signal leadin, or terminal is recited.
See also (2) Note under subclass 888, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
707 for antennas of the trailing or drag type.
713 and 717, for antennas supported by a vehicle.
718 for antennas with body attaching means.
866 for frames for loop antennas.
874 for mast or tower type antennas.
877 for antennas wound on reels.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), subclass 40 for a
shaft or tower with an article or article support wherein no
electrical feature for Class 343 is defined.
174, Electricity: Conductors and Insulators, particularly
40, 84+, 138, 151+, and 158+, conductors and insulators in
general involving supports.
211, Supports: Racks, particularly 119.01 for rack type
supports in general.
248, Supports, for supports in general.
285, Pipe Joints or Couplings, for pipe joints which may
involve supports.
362, Illumination, particularly 382, for supports for
illuminating devices.
Subclass:
879
This subclass is indented under subclass 878. Subject matter
wherein the support is peculiarly adapted to support two or
more separate and distinct antennas.
(1) Note. A mere plurality of antennas with their separate
supports does not fall within this subclass. To be
classified herein the support must be unitary in nature, the
parts or sections thereof cooperating to support two or more
separate antennas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
742 for plural high frequency type loops involving
supports.
770 for plural slot type antennas which involve supports.
774 and 776+, for plural wave guide type antennas involving
supports.
796 797+, 799+, and 810+, for plural dipoles involving
supports.
824 for planar type high frequency arrays involving
supports.
835 for plural antennas combined with reflectors involving
supports.
844 for plural antennas spaced a fractional or full wave
length apart involving supports.
867 for plural loop type antennas involving supports.
Subclass:
880
This subclass is indented under subclass 878. Subject matter
wherein the support is composed of multiple parts which are
relatively movable or adapted to receive the antenna to
permit adjustment, collapse, or knock-down of the support
and/or the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
713 for antennas supported by a vehicle body which may be
adjustable.
757 for antennas combined with means for moving directive
antennas for scanning, sweeping or orienting.
805 for dipoles having the arms angularly adjustable.
823 for adjustable length dipoles.
839 for reflectors and antennas which are relatively
movable.
868 for loop antennas having adjustable configuration, area
or coil length.
869 for loop antennas with a rotatable support.
871 for loop type antenna and frame which may be collapsible
or foldable.
889 for rod antennas which are retractable into their
supports.
901 for telescoping type rod antennas.
915 for collapsible and adjustable reflectors and
directors.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, subclass 161
for adjustable or movably mounted insulator supports.
248, Supports, particularly subclass 48, 59, 70, 122, 161+,
165, 178+, 274.1+, 323+, and 354+, for adjustable and
collapsible supports in general.
362, Illumination, particularly 418, for adjustable or
collapsible illuminating devices.
Subclass:
881
This subclass is indented under subclass 880. Subject matter
wherein the support is composed of multiple parts which are
so joined together that the parts have different relative
positions in use and non-use to permit the antenna to be
folded into a more compact space when not in use.
(1) Note. Antennas with supports which may be completely
disassembled when not in use, i.e., the "knock-down" type,
are classified elsewhere. See the search note below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
880 for antennas with supports which may be completely
disassembled when not in use, i.e., the "knock-down" type,
SEE OR SEARCH CLASS:
211, Supports: Racks, subclass 85, 104+, 118, 167, 186+, and
195+, for subject matter including special types of foldable
supports and racks.
248, Supports, particularly 46, 136, 150, 166+, 190, 240, and
308 for foldable supports.
Subclass:
882
This subclass is indented under subclass 880. Subject matter
wherein the support has parts relatively pivoted or rotatable
to permit the antenna mounted on one of the parts to be
pivoted or rotated, or the support receives the antenna in
pivoted or rotatable relation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
711 for antennas supported from a vehicle body which may
include pivoted or rotatable features in the support.
757 for antennas with means for moving a directive antenna
combined with means for rotatably supporting the antenna.
805 for dipole antennas having the arms angularly
adjustable.
839 for reflectors and antennas relatively movable.
869 for loop antennas with rotatable supports.
900 for rod type antennas having flexible joints.
915 for foldable, collapsible, or adjustable reflectors and
directors.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 137, and
particularly subclasses 138, 151+ and 161, for pivoted or
rotatable insulating means.
248, Supports, 38 and particularly subclasses 43, 44 and 45,
for pivoted or rotatable-staff stands, bases or brackets;
subclass 81 for pivoted standards for a hose or nozzle;
subclass 128 for stands for movable receptacles; subclass 160
for flexible standard-type stands; subclasses 178+ for
adjustable head article-support stands; subclasses 274.1+ for
adjustable brackets; subclasses 324+ for suspended supports
having adjustable, pivoted parts; and subclass 349.1 for
rotatable supporting bases.
285, Pipe Joints or Couplings, subclass 51 for insulated
ball and socket joints, subclasses 136.1+ for a pipe or
rod-to-pipe-to-plate joint system, especially subclass 138.1,
subclasses 261+ for a ball and socket pipe joint, and
subclasses 305+ for a pipe coupling having catch means
holding the coupled members together. See the Search Notes
thereunder.
403, Joints and Connections, 52 for articulated connections
in general.
Subclass:
883
This subclass is indented under subclass 880. Subject matter
wherein the support is constructed of multiple sections
capable of sliding motion within each other to be extensible
or retractable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
823 for dipoles with telescoping arms.
871 for loop antennas with collapsible loop frames which may
have telescopic features.
889 for rod antennas retractable into their supports.
901 for telescopic rod antennas.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), for a residual rigid
elongated structure, particularly subclass 632 and 726.1 for
axially extensible or end-to-end connected shaft sections
wherein no electrical feature for Class 343 is defined.
174, Electricity: Conductors and Insulators, subclass 69
for extensible conductors.
285, Pipe Joints or Couplings, 298 for adjustable length
pipe joints or couplings. See the Search Notes thereunder.
403, Joints and Connections, 52 for articulated connections
in general.
Subclass:
884
This subclass is indented under subclass 878. Subject matter
wherein the support for the antenna also constitutes a
transmission line, such as a coaxial line or wave guide, for
feeding the signal energy to or from the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
767 for slot type antennas wherein the slot feed constitutes
a support.
772 for wave guide type antennas wherein the antenna feed
constitutes a support.
790 for sleeve type antenna, whose feed constitutes a
support.
825 for fractional, multiple, or full wave length linear
type antennas, whose feed constitutes a support.
Subclass:
885
This subclass is indented under subclass 878. Subject matter
combined with means to modify the electrical characteristics
of the support.
(1) Note. This subject matter includes, for example,
conductor means to prevent concentration of electrical
stress, conductor or insulator means to modify the voltage
gradient, and means for electrically grading sections of the
support.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 140 for
insulators combined with conductive arcing or stress
distributing means. Note particularly the notes thereunder.
Subclass:
886
This subclass is indented under subclass 878. Subject matter
wherein the support includes two or more spaced apart poles,
standards, or other upright members which maintain an antenna
or antenna component therebetween in a substantially
horizontal and elevated position.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, 40 for
supports and other details for overhead cables, conduits, and
conductors.
191, Electricity: Transmission to Vehicles, 40 for supports
for trolley conductor wires.
211, Supports: Racks, 119.01 for isolated supports with
flexible article supporting strand or strands joining the
supports.
Subclass:
887
This subclass is indented under subclass 878. Subject matter
where the support for the antenna or reflector has a
stream-line configuration to permit an unbroken flow of fluid
past the support free from turbulence and with the least
resistance.
SEE OR SEARCH THIS CLASS, SUBCLASS:
872 for protective supports or covers for antennas which may
have a stream-line shape.
908 for active antenna components having a distinctive
contour.
SEE OR SEARCH CLASS:
244, Aeronautics, particularly subclass 130, for aircraft
structure details for reducing aerodynamic resistance.
D14, Recording, Communication, or Information Retrieval
Equipment, particularly, 140 for design patents for
telephone and telegraph instruments which may include antenna
support designs.
Subclass:
888
This subclass is indented under subclass 878. Subject matter
wherein the supported antenna has a rod-like end portion, and
the support is peculiarly adapted to engage this rod-like end
portion.
(1) Note. The antennas in this subclass are usually rods
supported at an end.
SEE OR SEARCH THIS CLASS, SUBCLASS:
715 for rod type antenna supported from a vehicle body.
872 for protective supports or covers for antennas.
874 for mast or tower type antennas.
882 for pivoted supports which may be combined with a
rod-like antenna.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), appropriate
subclasses for poles or posts of more general application
even though such structure be merely defined as an antenna or
antenna support, particularly subclass 110 for a rod
attached to a vehicle body, 111+ for a mechanism operated or
relatively movable shaft assembly, 651.01+ for elongated
three-dimensional openwork, and 720+ for miscellaneous shaft
structures.
174, Electricity: Conductors and Insulators, appropriate
subclasses for an antenna rod claimed by name only together
with an insulating support and an electrical connector or
terminal structure for connecting the rod to its energy
source or load, particularly 84 for conduits, cables and
conductors combined with joints which may involve rod-like
conductors; subclasses 138+ for insulators of special
application; subclasses 151+ for insulators extending through
a wall or plate; subclasses 158+ for insulator supporting or
attaching means which may be used to support rods.
248, Supports, for an antenna rod defined by name only with a
detailed support structure for that class, particularly 38
for supports for staff type objects.
285, Pipe Joints or Couplings, pertinent subclasses, for pipe
joints or couplings which may be used in supports for
rod-like antennas which are supported at an end.
403, Joints and Connections, appropriate subclasses for a rod
joint of general application.
Subclass:
889
This subclass is indented under subclass 888. Subject matter
wherein the rod type antenna is retractable into the end
supporting means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
714 and 715, for extensible and retractable antennas
supported by vehicle bodies.
789 for antennas within a conductive apertured wall.
823 for dipole antennas having telescoping arms.
872 for antennas having a protective support or cover in
which the antenna may be retracted.
901 for telescoping rod type antennas.
SEE OR SEARCH CLASS:
285, Pipe Joints or Couplings, 145.1 for telescopic ball and
socket pipe joints and couplings, and subclasses 298+ for
adjustable length pipe joints and couplings.
403, Joints and Connections, 52 for articulated connections
in general.
Subclass:
890
This subclass is indented under subclass 878. Subject matter
wherein the support includes a post, standard or tower
extending vertically to maintain the antenna or component
thereof in an elevated position.
(1) Note. In this subclass the post, standard or tower
merely supports the antenna, as distinguished from subclass
874 wherein the mast or tower constitutes in itself at least
part of the active antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
742 774, 796, 798, and 800, for particular types of antennas
which may be stacked on a pole, post or standard.
790 for sleeve type antennas surrounding a support.
874 see (1) Note, above.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), appropriate subclass
for a residual elongated rigid structure and see the
reference thereto in subclass 700 of Class 343.
174, Electricity: Conductors and Insulators, subclass 45
for towers, poles or posts supporting overhead conductors.
182, Fire Escape, Ladder, or Scaffold, 48 for a fire escape
tower.
248, Supports, 80, 97+, 105, 109, 116, 117.2+, 126, 127,
469+, 519+, and 676 for stand-type supports in general or for
supporting particular objects.
Subclass:
891
This subclass is indented under subclass 890. Subject matter
wherein the post, standard or tower has an antenna wire
extending along its length, and constitutes the sole support
for the wire.
SEE OR SEARCH THIS CLASS, SUBCLASS:
799 for vertically arranged dipoles, which may extend along
a post.
874 for mast or tower type antennas which may have
vertically extending wires forming a uniform electrical
cross-section.
Subclass:
892
This subclass is indented under subclass 878. Subject matter
wherein the support is an overhanging structure attached to
and projecting from some body such as a wall or post and
engages the antenna or a component thereof outside the body,
and is laterally offset from or suspended from the body to
maintain the antenna or component in a fixed position or path
of movement.
SEE OR SEARCH THIS CLASS, SUBCLASS:
717 for antennas supported underneath a vehicle.
888 for brackets supporting the rod-like end portion of an
antenna.
SEE OR SEARCH CLASS:
248, Supports, subclass 48.2, 65+, 103+, 115, 121+, 126,
200+, 332, 475+, 519+, and 674+ for brackets in general.
Subclass:
893
This subclass is indented under subclass 700. Combinations
of two or more antennas and not specially provided for
above.
(1) Note. Antennas of no particular type and with no
significant spacing or coupling, but arranged in particular
patterns, are classified here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
725 for plural separate diverse type antennas.
729 for plural diverse type antennas using the same active
element.
737 for plural traveling wave type antennas.
742 for plural high frequency type loops.
751 for plural antennas having lumped reactance for
loading.
758 for plural relatively movable directive antennas with
means for moving, for scanning, sweeping or orienting.
770 for plural slot type antennas.
774 for stacked biconical horn type antennas.
776 for plural wave guide type antennas.
794 796, 797+, 799+, and 810+, for plural center-fed doublet
antennas.
824 for planar type high frequency arrays.
826 for plural linear type antennas of fractional, multiple
or full wave length.
835 for plural active antennas with a reflector.
844 for plural antennas spaced a fractional or full wave
length apart.
852 for plural antennas with impedance matching coupling.
853 for plural antennas with coupling networks.
867 for plural loop type antennas.
876 for antennas with switching between the antennas and
line.
879 for plural separate antennas with a support.
SEE OR SEARCH CLASS:
342, Communications: Directive Radio Wave System and Devices
(e.g., Radar, Radio Navigation), subclasses 1-205 for radio
wave energy communications systems, which may have a
plurality of antennas.
455, Telecommunications, 272 for receivers which may have a
plurality of antennas.
Subclass:
894
This subclass is indented under subclass 700. Antennas
having a signal, indicator or alarm responsive to a condition
of the antenna or its components.
(1) Note. Patents within the subclass definition involving
testing are classified in this subclass if the testing
involves indicating as herein defined.
(2) Note. Patents within the subclass definition which
involve measuring of the signal energy in addition to
indicating are not classified here but in subclass 703,
above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
703 for antennas having means for measuring and testing a
condition of the antenna.
721 for antennas with lights which do not indicate a
condition of the antenna.
760 for antennas having means for scanning, sweeping, or
orienting together with a signal, indicator or alarm for such
scanning, sweeping or orienting.
SEE OR SEARCH CLASS:
33, Geometrical Instruments, pertinent subclasses, for gauges
or other means which may be used in the indication of length,
etc.., for extensible antennas.
73, Measuring and Testing, for measuring and testing
processes and apparatus in general.
116, Signals and Indicators, for mechanical signals, alarms
and indicators in general.
324, Electricity: Measuring and Testing, for electrical
measuring and testing.
340, Communications: Electrical, for electrical signaling
devices in general.
Subclass:
895
This subclass is indented under subclass 700. Subject matter
wherein the antenna includes a wound conductor, and the
winding advances in a single plane (spiral), or over a
surface of a solid such as cylinder (helix) or sphere.
(1) Note. Antennas in this subclass and in subclasses 866+
(loops) form continuous electrical circuits, but in this
subclass (895) there is a single terminal feed to or from the
antenna; while in subclasses 866+ both ends of the continuous
antenna are connected to the separate lead-in terminals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
843 for antennas having an appreciable wave length dimension
which may be spiral or helical.
866 for loop type antennas. See also (1) Note, above.
896 for cage type antennas.
SEE OR SEARCH CLASS:
267, Spring Devices, particularly 73 for coil springs which
may be used as antennas.
336, Inductor Devices, particularly 225 for inductor
devices.
Subclass:
896
This subclass is indented under subclass 700. Subject matter
wherein the antenna is formed of conductive rods, wires or
mesh screens enclosing a space and wherein such rods, wires
or screens are connected together galvanically to form a
single electrical mass.
(1) Note. Antennas in this subclass and in subclasses 866+
may form continuous electrical circuits, but in this subclass
(896) there is a single terminal feed to or from the antenna;
while in subclasses 866+ both ends of the continuous antenna
are connected to the separate lead-in terminals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
804 for multiple conductor type folded dipoles.
808 for doublet antennas whose plural-rod arms form a V.
843 for antennas having an appreciable wave length dimension
which may involve cage-like structure.
866 for loop type antennas. See also (1) Note, above.
874 for mast or tower type antennas which may involve
cage-like structure.
895 for spiral or helical type antennas.
Subclass:
897
This subclass is indented under subclass 700. Subject matter
wherein the antenna is formed of conductive strips or strands
in mesh, braided, or woven form, or interwoven with
non-conductor strips or strands, or wherein the antenna is
formed of multiple conductive strips in sheet or planar form
not provided for elsewhere.
(1) Note. A mere fabric of insulating material with
metallic conductors interwoven therewith or a metal fabric
which may be used as an antenna is not classified here, but
in such classes as 66, Textiles: Knitting, subclass 202, 87,
Textiles: Braiding, Netting, and Lace Making, subclasses 1
through 13, or 139, Textiles: Weaving, subclass 425. See
the Search Notes below for a more detailed fabric search.
For classification in this subclass there must be claimed
some limitation which peculiarly adapts the fabric structure
to antenna operation, such as the antenna leadin.
SEE OR SEARCH THIS CLASS, SUBCLASS:
907 for antenna components, per se.
SEE OR SEARCH CLASS:
57, Textiles: Spinning, Twisting, and Twining, 200 for
strand structure.
66, Textiles: Knitting, subclass 202, for a knitted fabric
of or including metal strands.
87, Textiles: Braiding, Netting, and Lace Making, subclass 1
for products of braiding and netting processes.
139, Textiles: Weaving, subclass 425 for fabric materials
including metals. See (1) Note, above.
174, Electricity: Conductors and Insulators, subclass 121,
122 and 124, for conduits, cables or conductors in fibrous or
fabric insulation.
245, Wire Fabrics and Structure, 2 for wire fabrics.
428, Stocks Material or Miscellaneous Articles, subclass 175,
190, 193, and 196+ for a stock material product in the form
of a single or plural layer web or sheet embodying a layer of
mechanically interengaged strands or strand-portions (e.g.,
woven, knit, etc..).
442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth,
etc..), 181 for a woven fabric, subclasses 304+ for a knit
fabric, and subclasses 327+ for a nonwoven fabric.
Subclass:
898
This subclass is indented under subclass 700. Subject matter
wherein a substantial portion of the active antenna is hollow
and of metal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
767 for slot type antennas which may involve hollow metallic
bodies.
772 for wave guide type antennas.
790 for sleeve type antennas.
807 for balanced doublets having thick or enlarged arms
which may be hollow.
831 for stub type multiple or full wave antennas which may
be hollow.
896 for cage or hollow post antennas formed of rods or
wire.
Subclass:
899
This subclass is indented under subclass 700. Subject matter
wherein the antenna is so formed as to present a larger
surface to the radio wave transmitting medium; or wherein
additional elements are combined with the antenna for
increasing the surface presented to the radio wave
propagating medium; or wherein elements are provided which
are adapted to be electrically connected to the antenna to
increase the surface presented to the radio wave propagating
medium.
(1) Note. Examples of this area increasing structure are a
spiniferous shaped antenna and a metal mass such as a ball on
the free end of a rod type antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
749 for antennas with lumped inductance or capacity for
loading.
795 and 807, for sheet or wing type doublets, and tapered,
thick, or enlarged doublets, respectively.
802 for balanced center-fed doublet antennas with
distributed reactance added to the doublet arms.
811 for fish-bone type arrays of balanced center-fed doublet
antennas.
828 for antennas of significant electrical length having a
nonuniformity therein.
831 for stub type antennas of significant electrical
length.
896 for cage type antennas formed of rods or wires.
898 for hollow metallic body type antennas.
908 for antenna components having a distinctive contour or
shape.
Subclass:
900
This subclass is indented under subclass 700. Subject matter
wherein the antenna is of substantially fixed or stiff
elongated form of no claimed significant electrical length.
SEE OR SEARCH THIS CLASS, SUBCLASS:
715 for rod type antennas significantly related to vehicle
structure.
825 for rod type antennas of a significant electrical
length.
874 for mast or tower type antennas.
888 for rod type antennas with a support therefor.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), appropriate
subclasses for supported poles or posts of more general
application and having no features for antenna use,
particularly subclass 110 for a shaft supported on a vehicle
body, 111+ for a mechanism operated or relatively movable
shaft, and 292+ for a pole or post footing.
138, Pipes and Tubular Conduits, subclasses 140-178 for
metal pipe of the type which may be used in antennas.
174, Electricity: Conductors and Insulators, appropriate
subclasses for an electrically insulated or connected rod
which may be merely defined as an antenna with no mechanical
or electrical structure specialized making it an antenna,
particularly 68.1 for miscellaneous conduits, cables or
conductors, and 137+ for electrical insulators.
285, Pipe Joints or Couplings, appropriate subclasses for
such joints having no claimed electrical limitation for
antenna.
403, Joints and Connections, appropriate subclasses for rod
joints of general application.
428, Stock Material or Miscellaneous Articles, 544 for stock
materials, e.g., or indefinite length, which are all metal or
have adjacent metal components which may be used in rod-like
antennas.
Subclass:
901
This subclass is indented under subclass 900. Subject matter
wherein the elongated antenna is composed of multiple
sections capable of sliding motion within each other to be
extensible or retractable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
823 for dipoles with telescoping arms for adjusting the
length.
871 for collapsible loop frames.
883 for antennas with a telescoping support.
889 for rod antennas retractable into a support.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), subclass 121 for a
shaft of more general application which is longitudinally
extensible by a flexible drive or hoist.
174, Electricity: Conductors and Insulators, subclass 69
for conductors which are extensible.
285, Pipe Joints or Coupling, 298 for adjustable length pipe
joints or couplings.
Subclass:
902
This subclass is indented under subclass 901. Subject matter
including structure which provides adjustment of the
telescoping position of the antenna sections in response to
change in the pressure of a fluid.
(1) Note. For classification in this subclass there must be
some claimed electrical limitation as opposed to a mere
recitation of a fluid motor or expansible chamber device
structure. The mere recitation that the device or a mounting
therefor is formed of insulating or conducting material, if
the claim is otherwise directed to a fluid motor or an
expansible chamber device, will not preclude classification
in a fluid motor or expansible chamber device class.
SEE OR SEARCH CLASS:
60, Power Plants, 325, for a fluid pressure means which may
be used for extending or retracting antennas.
91, Motors: Expansible Chamber Type, appropriate subclasses
for expansible chamber motors, per se.
92, Expansible Chamber Devices, appropriate subclasses for an
expansible chamber device in which the piston or cylinder is
disclosed as an antenna.
123, Internal-Combustion Engines, appropriate subclasses for
fluid pressure means of the internal combustion (or
explosive) type confined to a cylinder.
Subclass:
903
This subclass is indented under subclass 901. Subject matter
including a flexible rod for adjusting the telescoping
position of the antenna sections in response to movement of
the rod.
(1) Note. Usually the rod extends within the antenna.
Often the rod is wound on a reel.
SEE OR SEARCH THIS CLASS, SUBCLASS:
714 for adjustable antennas significantly related to vehicle
structure which may be operated by a rod.
877 for antennas combined with a reel on which the antenna
is wound.
889 for rod type antennas retractable into a support which
may be actuated by a rod.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, appropriate subclasses for
mechanical movements for extending or retracting telescopic
antennas, particularly subclass 95 for flexible connector
type movements, and subclass 424.8 for screw and nut gearing
devices adapted to move telescopic sectional elements.
242, Winding, Tensioning, or Guiding, 370, particularly
subclasses 390.2, 390.3, and 917 for unwinding and rewinding
a flexible material which may include an antenna.
Subclass:
904
This subclass is indented under subclass 700. Subject matter
wherein the antenna is combined with other structure which
perfects it, and which combinations are not provided for
above.
(1) Note. See the search this class, subclass references
below for particular combinations of antennas within the
class definition, such as antennas combined with vehicle
structure, with means for moving directive antennas for
scanning, sweeping or orienting, and with diverse type art
device.
(2) Note. For classification herein, the other structure
must be for the purpose of perfecting or improving the
antenna in the performance of its primary function, which is
the radiation or collection of radio wave energy together
with the transmission of such energy to or from the
transmitter or receiver, as opposed to subclasses above that
are limited to antennas combined with devices or structures
having an added purpose or independent utility other than to
perfect the antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
711 for antennas combined with vehicle structure.
757 for antennas with means for moving directive antennas
for scanning, sweeping or orienting
720 for antennas with diverse type art device.
SEE OR SEARCH CLASS:
200, Electricity: Circuit Makers and Breakers, for the
structure of electric switches, per se.
333, Wave Transmission Lines and Networks, 24 for wave
guides having an antenna coupled within the guide.
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigations), subclasses 1-205 and 350+
for detailed radio wave energy communication structure
combined with an antenna.
455, Telecommunications, appropriate subclasses for radio
receivers and/or transmitters including an antenna.
Subclass:
905
This subclass is indented under subclass 904. Subject matter
wherein the other structure includes a transmission line.
(1) Note. The transmission line may be shielded, e.g.,
coaxial line, or be associated with other structure, or have
a configuration or arrangement to suppress radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
850 for antennas combined with a coupling network or an
impedance in the leadin.
SEE OR SEARCH CLASS:
174, Electricity: Conductors and Insulators, particularly
68.1 for conduits, cables, and conductors.
333, Wave Transmission Lines and Networks, 100 for branched
circuits in plural channel systems which may be adapted for
connection to an antenna, and subclasses 236+ for long lines,
per se.
Subclass:
906
This subclass is indented under subclass 904. Subject matter
combined with electrical connector structure for connecting
an antenna to transmission or feed lines or other apparatus.
(1) Note. The electrical connector may have a shield or
other structure associated therewith for suppressing
radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
850 for antennas with a coupling network or an impedance in
the leadin.
870 for loop antennas with a connector or terminals.
876 for switching between plural antennas and line or
between plural lines and antenna.
SEE OR SEARCH CLASS:
439, Electrical Connectors, for electrical connectors in
general.
Subclass:
907
This subclass is indented under subclass 700. Components and
elements not constituting a complete antenna which are
limited to use in antennas and which are not provided for in
any preceding subclass or in any other class.
(1) Note. This subclass includes antenna conductors under
the class definition which involve the material or
composition of the conductor and which conductors are not
classifiable in any other class.
(2) Note. This subclass does not provide for the antenna
conductor defined only as being formed of a particular
composition or material, or only as a base with a coating or
lamination thereon. For the excluded subject matter, see
SEARCH CLASS below.
(3) Note. This subclass does not provide for antenna
conductors which are defined only as a wire or electric
conductor. For the excluded subject matter, see SEARCH CLASS
below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
707 for aircraft with trailing type antennas.
731 for traveling wave type antennas which may be combined
with energy absorbing means.
741 for high frequency type loops.
767 for slot type antennas.
773 for biconical horn wave guide type antennas.
780 for "pillbox" type antennas.
785 for wave guide antennas of solid liquid or gaseous
dielectric type.
786 for horn type wave guide antennas, per se.
787 for antennas having a magnetic core or auxiliary
magnet.
790 for sleeve type antennas.
793 for balanced center-fed doublets in general, and
pertinent subclasses included therein for special types of
doublets and doublets with reflectors or directors.
825 and 843, for antennas of a particular electrical
dimension.
832 for an active antenna used as a reflector.
833 for antennas with a parasitic director.
834 for antennas with a parasitic reflector.
841 for antennas with an electrical shield.
846 for antennas having counterpoises, ground planes or
grounding means.
866 for loop type antennas.
872 for antennas having protective covers or supports.
874 for mast or tower type antennas.
896 for cage type antennas.
897 for mesh, woven, braided or multiple strip type
antennas.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), pertinent subclasses
for a structural combination of rods and tubes of more
general utility.
57, Textiles: Spinning, Twisting, and Twining, 210 for
strand structure of wire-rope; and subclass 235 for web
materials which may be used in antennas.
87, Textiles: Braiding, Netting, and Lace Making, 8 for
braided strands or fabrics which may be used in antennas.
138, Pipes and Tubular Conduits, subclasses 100-178 for
hollow stock material such as pipes or tubes which may be
used in antennas.
139, Textiles: Weaving, subclass 425 for woven textile
structures including metal.
148, Metal Treatment, 400 for metal stock which has been
treated by a Class 148 process, e.g., heat treated, etc..
174, Electricity: Conductors and Insulators, particularly
126.1 for conductor structure.
191, Electricity: Transmission to Vehicles, 22 for
conductors for transmission of electricity to moving
vehicles.
245, Wire Fabrics and Structure, pertinent subclasses for
wire fabrics and structure.
252, Compositions, subclass 490 for electrical resistance
compositions.
333, Wave Transmission Lines and Networks, particularly 236
and 245+ for long lines and long line elements and
components.
336, Inductor Devices, particularly subclass 117 and 222+
for inductor devices with a core of magnetic material and for
winding structure including the composition of the windings,
respectively.
420, Alloys or Metallic Compositions, for single metals or
alloys which may be used in antennas.
428, Stock Material or Miscellaneous Articles, appropriate
subclasses, for a stock material product in the form of a
single or plural layer web or sheet which may inherently
possess desirable properties of an antenna, 544 for stock
materials, e.g., of indefinite length, which are all metal or
have adjacent metal components which may be used in rod-like
antennas.
Subclass:
908
This subclass is indented under subclass 907. Subject matter
wherein the conductor or other component of the active
antenna has a distinctive contour or shape.
(1) Note. This does not include cables of particular cross
section, which may be used as antennas. See Class 174 for
such subject matter.
SEE OR SEARCH THIS CLASS, SUBCLASS:
767 for radiating slot type antennas.
795 for sheet or wing type balanced doublets.
802 for balanced doublets with distributed reactance added
to the arms.
806 for balanced doublets with bent arms.
807 for balanced doublets with tapered, thick or enlarged
arms.
828 for linear antenna having a particular electrical length
with a non-uniformity therein.
831 for stub shaped antennas having a particular electrical
length.
868 for loop antennas of adjustable configuration.
874 for mast or tower type antennas.
895 for spiral or helical shaped antennas.
896 for cage type antennas.
897 for mesh, woven, braided or multiple strip antennas.
898 for antennas including a hollow metallic body.
899 for antennas with area increasing means.
SEE OR SEARCH CLASS:
336, Inductor Devices, subclass 223 and 225+ for coils
having distinctive conductor shape and distinctive coil
configuration, respectively.
Subclass:
909
This subclass is indented under subclass 907. Subject matter
including components which transmit therethrough a radio wave
which impinges thereon from space and returns the wave to
space after it has passed through and which modify the wave
in transmission therethrough usually by delaying or
accelerating some portions of the wave more than others, as
follows: (1) alters the direction of propagation of the wave,
as by refraction; (2) brings the wave front to a focus or
converts a plane wave front to a spherical wave front or vice
versa (3) changes the type of polarization, e.g., converts a
plane polarized wave to a circularly polarized wave, or
rotates the plane of polarization; (4) filters one or more
polarization components (5) filters one or more frequency
components.
(1) Note. This subject matter need not be closely
associated with an antenna, but may be applied to a radio
beam remote from any antenna, or in a wave guide.
SEE OR SEARCH THIS CLASS, SUBCLASS:
753 for antennas with spaced electromagnetic lenses or
diffractors.
756 for antennas with a polarization filter.
783 for wave guide type antennas having an internal wave
refraction means.
912 for reflectors or directors, per se, which do not
transmit the electromagnetic wave therethrough.
SEE OR SEARCH CLASS:
250, Radiant Energy, especially 505 for electromagnetic wave
polarizers, filters, screens, lenses or refractors, per se,
exclusive of infrared, visible light and ultraviolet
electromagnetic radiation controlling elements.
333, Wave Transmission Lines and Networks, particularly
subclass 21, 24+, and 248+ for wave transmission systems
which may include electromagnetic lenses or refractors; and
subclasses 167+ for wave filters.
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigation), subclasses 1-205 and 350+
for radio energy communication systems, such as reflected
wave systems and beacons, which may include radio wave lenses
or refractors.
359, Optics: Systems (Including Communication) and Elements,
483 for optical polarizers, subclasses 642+ for optical
lenses, and subclasses 350+ 885+ and for optical filters.
Subclass:
910
This subclass is indented under subclass 909. Subject matter
wherein the component presents to the wave front a
propagating medium whose surface offers abrupt changes in
propagating characteristic.
(1) Note. These changes may result from changes in
propagating material, or in length of propagating path such
as a stepped formation. A mere series of parallel metal
strips in an air dielectric would not be classified here, but
in subclass 909, above.
Subclass:
911
This subclass is indented under subclass 909. Subject matter
wherein the component includes in the propagating path a
material having a significant dielectric characteristic.
SEE OR SEARCH THIS CLASS, SUBCLASS:
785 for solid, liquid, or gaseous dielectric wave guide type
antennas.
Subclass:
912
This subclass is indented under subclass 907. Subject matter
wherein the component constitutes a conductive structure
(usually metallic) which is adapted to return or to reradiate
into free space a substantial portion of the impinging radio
wave energy coming from or going to an associated active
antenna.
(1) Note. The reflectors or directors of this subclass are
adapted for use with an active antenna associated therewith,
and facilitate transmission or reception of this antenna in a
desired direction. See this Class 342, particularly
subclasses 1-20 for reflectors which have no active antenna
directly associated therewith, but which render their
presence known by reflecting energy from and to a remote
antenna.
SEE OR SEARCH THIS CLASS, SUBCLASS:
780 for pilox type antennas.
832 for an active antenna as a reflector.
833 and the search notes thereunder, for the combination of
a director and active antenna.
834 and the search notes thereunder, for the combination of
a reflector and active antenna.
878 for reflectors or directors with supports therefor.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, 248 for
reflectors in wave guides.
342, Communications: Directive Radio Wave Systems and Devices
(e.g., Radar, Radio Navigation), subclasses 1-20 see (1)
Note above.
359, Optics: Systems (Including Communication) and Elements,
838 for optical mirrors and reflectors.
362, Illumination, 341 for illumination reflectors.
Subclass:
913
This subclass is indented under subclass 912. Subject matter
wherein the reflector or director is combined with an
impedance connected or coupled to the reflector or director.
SEE OR SEARCH THIS CLASS, SUBCLASS:
722 731+, 745+, 749+, 814, 816, 820+, and 850+, for an
impedance associated with an active antenna element.
841 for antennas with an electrical shield, which may
include resistance.
Subclass:
914
This subclass is indented under subclass 912. Subject matter
wherein different portions of the reflector or director
surface have different curvatures, e.g., paraboloidal, plane,
spherical or cylindrical.
Subclass:
915
This subclass is indented under subclass 912. Subject matter
wherein the reflector or director is composed of relatively
movable parts for collapsing, folding or adjusting the
reflector or director; so that it may occupy a smaller space
or the curvature of its surface may be changed, or its
electrical characteristics may be varied.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723 for single adjustable length electrically long linear
antennas.
823 for adjustable length balanced doublet antennas.
868 and 871, for loop antennas of adjustable configuration
and having collapsible frames, respectively.
880 for antennas with adjustable or collapsible supports.
901 for telescoping rod type antennas.
Subclass:
916
This subclass is indented under subclass 912. Subject matter
wherein the reflector or director is composed of parts which
may readily be assembled or disassembled.
SEE OR SEARCH THIS CLASS, SUBCLASS:
880 for antennas with a knockdown support.
915 for collapsible, foldable or adjustable reflectors or
directors.
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