U.S. PATENT AND TRADEMARK OFFICE
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U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
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Class 322
ELECTRICITY: SINGLE GENERATOR SYSTEMS
Class Definition:
This is the Generic Class for: Single electric energy
generators for supplying single load circuits, there being
means to regulate or control the generator output, which
means may be electrical or nonelectrical and may act in the
prime mover for the generator, the power transmission means
between the generator prime mover and the generator, the
generator, or the armature (output) circuit of the generator,
or any combination thereof.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
A. GENERATOR RECITED BY NAME ONLY
Systems as defined in Class Definition, above are included in
this class even though the generator is recited by name only
if the system includes means for the regulation or control of
the generator output. Systems which include a generator
recited by name only, no significant characteristics of the
generator or its control being claimed, are classified with
the system, even though the type of current and/or voltage
produced by the generator is recited (i.e., as a 60 cycle
generator), the generator being considered only a source of
energy for the system. For such excluded systems, see the
classes referred to under "Search Class" below.
B. LOAD IN OUTPUT CIRCUIT RECITED BY NAME ONLY OR
SIGNIFICANTLY
1. Class 322 provides for single generator supplied single
load systems as defined in the Class Definition above not
otherwise classified even though the electric load in the
output circuit is recited by name only or by its electrical
characteristics, the system defined otherwise being drawn to
the control of the generator.
2. Systems having significant characteristics of the circuit
elements in the load circuit other than or in addition to
those for the control or regulation of the generator are
classified according to the type of load circuit or load
device claimed even though significant generator structure or
control is also claimed.
3. The following indicates in more detail the classification
lines followed in applying paragraphs 1 and 2 where
significant generator regulation or control is claimed in
combination with electric load or load circuit features.
a. Generator with Transformer or Inductance only in the Load
Circuit:
Where the transformer or inductance is recited by name only,
the system is in Class 322. Where significant characteristics
of the transformer or transformer circuit are claimed, the
system is classified as a transformer system. Merely
reciting that the transformer has primary and secondary
windings or that the transformer is an auto transformer is
not a recitation of significant transformer structure or
circuit. A recitation that the transformer is a variable
ratio transformer is a recitation of significant transformer
structure. Likewise systems having a significant structure
of an inductance or inductance circuit are classified
according to the type of system formed by the inductance. A
recitation that the inductance is variable is a recitation of
significant inductance structure. For the systems which
provide for systems having transformers and/or inductances
therein, see Class 323 referred to under "SEARCH CLASS"
below.
b. Generator with Condenser Only in Load Circuit:
Where the condenser is recited by name only, the system is
classified in Class 322, except in the following cases:
i. where the system is designed for the specific purpose of
charging and discharging the condenser, such a system being
classified in Class 320, Battery or Capacitor Charging or
Discharging, subclasses 166+.
ii. where the condenser is provided solely to control the
characteristics of the load circuit (power factor control
regulators) such a system being classified in Class 323
listed under References to Other Classes, below.
iii. or where the condenser is defined by significant
condenser structure, such a system being classified in Class
323, Electricity: Power Supply or Regulation Systems,
subclass 364.
c. Generator and Resistor Only in Load Circuit:
Where the resistor is recited by name only, the system is
classified in Class 322. Where significant characteristics
of the resistor or resistor system is claimed, the system is
classified as a resistor system. Also merely reciting a
variable resistance is not considered to be a recitation of
significant resistor or resistor system. If in the foregoing
systems, structure of the resistor is recited, the patent
will be excluded from Class 322.
d. Generator and Electric Switch Only in the Load Circuit:
Where the switch is recited by name only, the system is
classified in Class 322. Where significant switch structure
or switching system is claimed, the patent is excluded from
Class 322. Where an overload switch when open includes a
resistor in the circuit to limit the generator current flow,
the patent is classified in Class 322. Also, a switch in the
load circuit to prevent reverse current flow to the generator
is classified in Class 322.
e. Generator with frequency changing means and/or phase
converting means and/or current converting means and/or phase
control means:
Where the generator supplies a load circuit which includes
any of the following means, a frequency changing means, a
phase converting means, a current converting means, or a
phase controlling means, the patent is excluded from Class
322 whether the means in the load circuit is claimed broadly
or specifically. For such excluded systems, see the
references to Classes 363, Electric Power Conversion Systems,
and 323 Electricity: Power Supply or Regulation Systems,
under "SEARCH CLASS" below.
f. Generator and Testing Means for Generator, Signal or
Indicator for Generator, Recorder for Generator, Measuring
Means for Generator:
Where the generator system includes by name only testing
means for the generator, a recorder for the generator or
measuring means (voltage, frequency, current, etc.) for the
generator, the system is classified in Class 322. Class 322
also takes such systems where the system includes a plurality
of such means recited by name only. If any significant
characteristics of the testing means, signal or indicating
means or recorder, or measuring means are recited, the system
is classified with the particular means. For the classes
which provide for such means, see the classes referred to
under "Search Class" below.
g. Battery Charging and Discharging Systems:
This class excludes generator supplied battery charging
systems, battery discharging systems, and the combined
charging and discharging systems for one or more batteries.
Such systems are in Class 320, Electricity: Battery or
Capacitor Charging or Discharging. See the reference to
Class 320 under "Search Class" below.
h. Generator and Plural Circuit Elements or Means in the
Load Circuit:
Where the generator load circuit includes a plurality of
circuit elements or means, and one of the circuit elements is
a transformer, a frequency changing means, a phase
modification means, or a phase regulation means, even though
recited by name only, such system is excluded from Class 322.
Where the generator load circuit includes a plurality of
circuit elements or means, none of which are these recited in
the foregoing paragraph, and such elements are recited by
name only, and there is no recitation of the manner of
connection of the elements to make any particular type of art
system (as an impedance regulator), then the system is
classified in Class 322. Where the system includes any
significant characteristics of any of the plurality of
circuit elements or of their connection with respect to each
other in the load circuit, the system is classified according
to the type system formed by the load circuit elements.
C. POLYPHASE GENERATOR AND LOAD CIRCUIT:
This class includes polyphase generator systems for supplying
a single polyphase load circuit where significant generator
structure or control is recited and if the polyphase load
circuit is not excluded from the class by the limitation of
"B. Load In Output Circuit Recited By Name Only Or
Significantly" above. A polyphase load circuit including a
plurality of single phase load circuits is excluded from
Class 322 as being a plural load circuit.
D. PLURAL GENERATORS AND/OR PLURAL LOAD CIRCUITS:
1. Plural Generators:
Systems having a plurality of generators supplying a single
load circuit or having a plurality of generators supplying a
plurality of load circuits are excluded from Class 322.
However, Class 322 does include single generator systems
having one or more generators used as the source of
excitation for the generator which supplies the single load
circuit. See subclasses 59+. For the excluded subject
matter, see the classes in References to Other Classes,
below.
2. Plural Load Circuits:
Where the patent discloses a generating system and a
plurality of load circuits supplied by a generator, but the
plurality of load circuits are not claimed, the patent is
included in Class 322. Where significant characteristics of
the load circuits are claimed, so that the load circuits do
not constitute a single load circuit, the patent is
classified in the classes listed in References to Other
Classes, below.
E. GENERATING SYSTEMS WITH NONMAGNETIC GENERATOR:
This class provides for generating systems as defined in the
Class Definition, above having a nonmagnetic generator which
are not otherwise classified. Nonmagnetic generators include:
i. Battery generators. ii. Thermoelectric generators. iii.
Photoelectric generators. iv. Piezoelectric generators. v.
Electrostatic generators. vi. Friction generators. See
References to Other Classes, below for these other classes
and subclasses which provide for generating systems having a
nonmagnetic generator.
F. NONELECTRICAL MEANS CONTROLLING THE GENERATOR:
Systems as defined in the Class Definition, above are
included in this class where the only control means for the
generator is a nonelectrical means (such as a mechanical or
hydraulic system) controlling the operation of the generator
prime mover, or the power transmission between the prime
mover and the generator.
Where the prime mover is a nonelectric prime mover, see "G.
Prime Mover Driven Generator Systems--b. Nonelectric Motor
Driven Systems," below. Where the generator control means
which controls only the generator structure (such as the
generator magnetic structure or the brushes) no other
generator control being provided, the subject matter is
considered to be only generator structure and is excluded
from Class 322. Where the generator control means includes
electric means and nonelectric means, the subject matter is
considered to be a generator control or regulation system
included in Class 322.
G. PRIME MOVER DRIVEN GENERATOR SYSTEMS:
a. Electric Motor Driven Generator Systems:
This class provides for systems as defined in the Class
Definition, above wherein the prime mover for the electric
generator is an electric motor where significant generator
structure or circuit is claimed, except where there is a
significant relationship between the characteristics of the
input circuit for the motor with relation to the output
circuit of the generator so that the generator and its motor
prime mover constitutes a translating device in a system for
converting electric energy having particular characteristics
to electric energy having other characteristics. Such
excluded systems are classified in Class 363, Electric Power
Conversion Systems. Included in Class 322, in subclasses 10+
are motor generator systems where the generator is used as a
motor to start the motor, the motor after the starting period
is over, serving as a prime mover for the generator. Motor
generator systems where the generator is recited by name only
and is only a nominal load for the motor are excluded from
Class 322 and are classified in Class 318, Electricity:
Motive Power Systems as a motor system. See the reference to
Classes 321, 318 and 333 under "Search Class" below.
b. Nonelectric Motor Driven Generator Systems: Electric
generating systems having the generator driven by a
nonelectric prime mover and where either significant
characteristics of the prime mover or significant prime mover
control features are set forth are excluded from Class 322,
and are classified in Class 290, Prime-Mover Dynamo Plants.
GENERATOR STRUCTURE, PER SE:
This class provides for electrical system as distinguished
from the structure of the devices capable of translating
nonelectric to electric energy. See "F. Nonelectrical Means
Controlling The Generator," above. For the classes which
provide for generator structure, per se, see the classes
referred to in References to Other Classes, below.
SYSTEMS GENERIC TO MOTORS OR GENERATORS:
Where the system includes a dynamo-electric machine, and the
machine is disclosed but not claimed as either an electric
motor or and electric generator, the patent is classified in
Class 322, if the claimed system is otherwise within the
definition of Class 322, and provided that no structure or
circuit is claimed that limits the system to being a motor
system (in case the machine is disclosed as being a motor.
Where the machine is claimed as being either a motor or
generator, the patent is classified in Class 322). However,
see Class 505, Superconductor Technology: Apparatus,
Material, Process, subclasses 150+ for high temperature
(T[subscrpt]c[end subscrpt] 30 K) superconducting devices,
and particularly subclasses 166+ for motors or generators
containing high temperature superconductors.
GENERATOR SYSTEMS COMBINED WITH OTHER SYSTEMS:
Where a generating system is part of an art system or other
system, it is classified with such art device or other
system. For a partial list of the classes that provide for
such art systems or other systems, see the classes listed
under References To Other Classes below.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
40, Card, Picture, or Sign Exhibiting, and appropriate
subclasses, for generator supplied signs, see subclasses
541+, for illuminated signs.
43, Fishing, Trapping, and Vermin Destroying, subclass 16
and 17, for generator supplied signaling devices, subclass
42.07, for generator supplied illuminated bait, subclasses
98+, for generator supplied electrocuting trap, subclass 112,
for generator supplied electrocuting devices for insects, and
subclass 113, for generator supplied illuminated traps for
insects, and subclass 27, for generator supplied devices to
illuminate artificial and live bait.
47, Plant Husbandry, subclass 1.3, for generator supplied
systems of electroculture for plants.
73, Measuring and Testing, and appropriate subclasses, for
generator systems used in measuring and testing apparatus.
See note 3, C, Electrical, to the class definition of Class
73, for the line between Classes 73 and 322. In Class 73,
see subclasses 862+, for dynamometer systems for measuring
torque, moments work or power by measuring the force exerted
or power exerted by a prime mover for a dynamoelectric
generating machine, see indented subclass 862.191 for such
systems where the power is measured during transmission.
84, Music, subclasses 600+, for electric musical instruments
utilizing an electric generator for electrical tone
generation. See subclasses 1.04+, where the generator
includes a tuned sound wave generator or resonator (such as
tuned reed or string) subclass 1.18 where the instrument
includes an electro-optical type (photo-cell) generator,
subclasses 1.19+, for the instruments with generators
(usually dynamoelectric generators) and means for the
selective control of the tone partials, and subclass 1.28 for
the instruments with pattern or sound record type
generators.
105, Railway Rolling Stock, subclasses 35+, for locomotives
in which a prime mover runs an electric generator for
generating electricity which supplies current for electric
motors to drive the locomotive, and subclasses 49+, for
generator supplied electric locomotives, see indented
subclasses 50+, for electric locomotives which carry primary
or storage batteries for the supply of electricity to the
motors or other car devices.
123, Internal-Combustion Engines, subclasses 143+, for
generator supplied ignition systems for internal combustion
engines; see subclass 148, for the high tension ignition
systems including those having a dynamoelectric generator;
and subclass 149, for ignition systems having a
dynamoelectric generator operated by an engine, the dynamo
supplying the ignition current, and for combined
dynamo-electric generator and ignitors and for dynamoelectric
generators which are especially designed for use with
internal combustion engines for supplying the ignition
current.
136, Batteries: Thermoelectric and Photoelectric subclass
89, for structure of photoelectric generators, and see "E.
Generating Systems With Nonmagnetic Generator:" above for a
reference to battery generators, per se. ("Photoelectric
Generators")
136, Batteries: Thermoelectric and Photoelectric, subclasses
200+ for structure of thermoelectro generators. ("
Thermoelectric generators")
188, Brakes, subclasses 159+, for brakes operated by means of
electric current furnished by the motors, acting as
generators.
204, Chemistry: Electrical and Wave Energy, is the generic
class for chemical apparatus and systems involving electric
and wave energy and including arrangements wherein the source
of electric energy is a generator.
219, Electric Heating, for generator supplied heating and
welding systems.
236, Automatic Temperature and Humidity Regulation,
appropriate subclass 69 for thermocouples used in
temperature regulating systems. ("Thermoelectric
generators")
246, Railway Switches and Signals, for generator supplied
electric railway switch and signal systems; see subclass 245,
for car actuated generators, that is, devices by which the
energy of the moving vehicle is converted into electrical
energy for actuating switches and/or signals.
250, Radiant Energy, subclasses 200+, for miscellaneous photo
cell controlled electric circuits and photocell apparatus,
particularly subclass 212 where the photocell is a
self-generating type cell (e.g., battery) which supplies
electric current to the circuit. ("Photoelectric
Generators")
257, Active Solid-State Devices (e.g., Transistors,
Solid-State Diodes), subclass 10, 11, 21, 53-56, 72, 80-85,
113-118, 184-189, 225-234, 257-258, 290-294, 414, and 431-466
for light responsive active semiconductor devices.
("Photoelectric Generators")
290, Prime-Mover Dynamo Plants, see section I, J, of the
class definition above, for a reference to nonelectric prime
mover driven electric generators.
307, Electrical Transmission or Interconnection Systems,
subclasses 11+ for systems wherein one or more generators
are interconnected with two or more load circuits, and
subclasses 43+ for systems wherein two or more generators
supply an electrical system.
310, Electrical Generator or Motor Structure, subclass 306
for pyromagnetic electric generators and generation systems.
(" Thermoelectric generators")
310, Electrical Generator or Motor Structure, subclasses 311+
for piezoelectric generators and generation systems. (
"Piezoelectric Generators")
310, Electrical Generator or Motor Structure, subclass 309
for electrostatic generators. ("Electro-state generators")
310, Electrical Generator or Motor Structure, subclass 310
for friction generators. ("Friction Generators)
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, appropriate subclasses, for generator supplied
consumable electrode devices (arc lamps, arc welding,
electrodes, etc.).
315, Electric Lamp and Discharge Devices: Systems, subclass
55 for electric lamps and electrical space discharge devices
(radio tubes) which have a piezoelectric device structurally
combined therewith so as to form a unitary device. (
"Piezoelectric Generators")
315, Electric Lamp and Discharge Devices: Systems, and the
classes and subclasses specified in the notes to the
definition of that class, for generator supplied electric
lamps and electric space discharge devices. See subclass 33,
for the portable self-contained systems in class 315;
subclass 55 for lamps and electric space discharge devices
having an electric current generator combined therewith to
form a self-contained unit; subclass 78, for class 315
systems having the electric current generator driven by a
vehicle motor or driven in response to the motion of a
vehicle; and subclass 302, for regulating systems within
class 315, where the system includes means to control the
current generator.
318, Electricity: Motive Power Systems, for generator
supplied motor systems. See section J of the class
definition above for motor driven generator systems. See
section III of the class definition of Class 322 for the line
between Classes 318 and 322 with respect to systems having a
dynamoelectric machine where the machine is disclosed as a
motor, but is not claimed as a motor and where the claimed
system is generic to either a motor or generator.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a generator-supplied
battery charging system (See section I, D, 3, g, and I, G, of
this class definition for the line between Classes 320 and
322 with respect to a generator-supplied battery load); and
subclasses 166+ for a generator-supplied capacitor charging
circuit (See "Load In Output Circuit Recited By Name Only Or
Significantly:--Generator with Condenser Only in Load
Circuit" above for the line between Classes 320 and 322 with
respect to a generator supplying a load capacitor.)
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery charging
either another battery or a capacitor, or for a
generator-supplied battery charging system. ( "Battery
charging or discharging")
323, Electricity: Power Supply or Regulation Systems, for
miscellaneous voltage magnitude controlled systems and
miscellaneous phase controlled systems.
324, Electricity: Measuring and Testing, appropriate
subclasses, for testing apparatus having electric generators
for supplying the electric current for the testing, electric
systems for testing the characteristics of electric
generators (see "Load In Output Circuit Recited By Name Only
Or Significantly:--Generator Testing Means for Generator,
Signal, etc." above for a statement of the general line
between Classes 324 and 322 for generator systems provided
with a testing means), and testing apparatus using electric
generator systems for indicating some characteristic of the
device being tested (such as speed).
331, Oscillators, subclass 73 for crystal oscillators of the
electron-coupled type, subclass 139 for crystal oscillators
of the bridge type, subclass 155 for oscillators wherein a
piezoelectric crystal drives or is driven by the
electro-mechanical frequency determining resonator of the
oscillator and subclass 158 for crystal oscillators in
general. ( "Piezoelectric Generators")
331, Oscillators, subclass 71 for oscillation generating
systems wherein a generator of raw A.C. may be employed as
source of power or bias for the oscillator, and subclasses
185+ for oscillation generating systems having a particular
source of power or bias voltage, which source may be a
generator of the type classified in Class 322.
333, Wave Transmission Lines and Networks, subclasses 148+
for delay networks of the electro- mechanical transducer
type, which may include a piezoelectric device, and wherein
the mechanical coupling between the motor and the generator
determines the delay characteristics of the network, and
subclasses 187+ for wave filters of the piezoelectric type.
("Piezoelectric Generators")
333, Wave Transmission Lines and Networks, subclasses 148+
for delay networks of the electromechanical type, subclasses
167+ for wave filter networks, particularly subclasses 186+
for wave filters of the electromechanical type, wherein the
mechanical coupling between the motor and the generator
determines the propagation characteristic of the filter.
340, Communications: Electrical, appropriate subclasses, for
generator systems having an electric signal or indicator; see
"Load In Output Circuit Recited By Name Only Or
Significantly:--Generator Testing Means for Generator,
Signal, etc." above for the general line between Class 322
and Class 340 with respect to such systems. See "Generating
Systems With Nonmagentic Generator" of the class definition
of Class 322 for a reference to the nonelectromagnetic
induction generators in Class 340.
340, Communications: Electrical, subclass 10 for
piezoelectric devices used in submarine signaling. (
"Piezoelectric Generators")
361, Electricity: Electrical Systems and Devices, subclasses
139+ for relay systems, subclasses 236+ for
speed-controlled systems which include an electric current
generator system, and subclasses 247+ for igniting systems
having electric generators for supplying the igniting
device.
361, Electricity: Electrical Systems and Devices, subclasses
271+ for condenser structure. ("Electro-state generators")
362, Illumination, subclass 193 for bicycle driven
generators for supplying a lamp; subclasses 157+ for
miscellaneous portable self-contained electric lamps
(flashlights).
363, Electric Power Conversion Systems, appropriate
subclasses for conversion systems which may be supplied by a
generator. subclasses 102+ for dynamoelectric machine
current converter systems wherein the converter might be a
motor-generator set or an analogous machine; subclass 150 for
dynamoelectric phase converter systems; subclasses 174+ for
dynamoelectric machine frequency converter systems,
particularly subclass 175 wherein the converter comprises a
motor-generator set.
369, Dynamic Information Storage or Retrieval, subclass 144
for a piezoelectric phonograph pickup; and subclasses 146+
for an electromagnetic phonograph pickup.
373, Industrial Electric Heating Furnaces, and appropriate
subclasses, for electric generator supplied furnaces, note
especially subclasses 102+, for arc furnace control systems,
and subclasses 135+, for resistance furnace control systems.
374, Thermal Measuring and Testing, subclasses 179+ for a
temperature measuring system having a thermoelectric sensor.
("Thermoelectric generators")
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, appropriate subclasses for nuclear reactors, per
se, which may be combined with electric generator systems of
this class (322). For the line between Class 376 and the
energy generating classes see the class definition of Class
376 under II (1) and (2a).
379, Telephonic Communications, appropriate subclasses for a
telephone device or system with power source detail, subclass
371 for magneto signalling in a telephone system.
381, Electrical Audio Signal Processing Systems and Devices,
subclass 173 for piezoelectric microphones and subclass 190
for a piezoelectric speaker. ( "Piezoelectric Generators")
381, Electrical Audio Signal Processing Systems and Devices,
subclass 177 for a moving coil microphone structure.
416, Fluid Reaction Surfaces (i.e., Impellers), appropriate
subclasses for a generator system combined with significant
impeller structure.
441, Buoys, Rafts, and Aquatic Devices, subclasses 1+ for
generator supplied buoys; and subclasses 13+ for illuminated
buoys.
455, Telecommunications, subclass 95 for generator supplied
portable radio transmitters and receivers; and see subclass
351 for portable self-contained receivers.
505, Superconductor Technology: Apparatus, Material,
Process, subclasses 150+ for high temperature
(T[subscrpt]c[end subscrpt] 30 K) superconducting devices,
and particularly subclasses 166+ for motors or generators
containing high temperature superconductors.
607, Surgery: Light, Thermal, and Electrical Application,
appropriate subclasses, especially subclass 1, electric
generator supplied surgical apparatus, also for chairs and
seats combined with an electric generator (rocking of the
chair used to operate dynamoelectric generator), subclass 149
for devices to be worn on the person, as belts, bands, etc.,
which include an electric generator (usually a battery), and
subclasses 115+ for portable self contained medical apparatus
for applying electric energy to the body and including an
electric generator.
GLOSSARY:
ELECTRIC ENERGY GENERATORS
As used herein are devices and apparatus for converting any
character of nonelectric energy to electric energy.
ELECTRIC GENERATING
As used herein involves the conversion of any character of
nonelectric energy to electric energy.
LOAD CIRCUIT
Includes the system into which the electric energy from the
electric generator is supplied, and may include a load device
recited broadly or by name only (such as a welding load) in
some cases. See Lines With Other Classes and Within This
Class, above.
SUBCLASSES
Subclass:
1
This subclass is indented under the class definition. Subject
matter wherein the system is modified to produce an
arrangement which is peculiarly adapted to be mounted on a
movable device.
(1) Note. The mere fact that a generating system is made so
light and small that it may be readily carried does not put
the system in this subclass. Some modification of the system
to the movable device is necessary.
SEE OR SEARCH CLASS:
40, Card, Picture, or Sign Exhibiting, appropriate
subclasses, for portable generator supplied self-contained
signs, see subclasses 541+, for illuminated signs.
43, Fishing, Trapping, and Vermin Destroying, subclass 16, 17
for portable, generator supplied illuminated signaling
devices for fishing apparatus, subclass 17.6 for portable
supplied illuminated bait, and subclass 17.5, for portable,
generator supplied bait illuminators.
105, Railway Rolling Stock, subclasses 35+ and 49+, for
generator supplied locomotives. See subclass 35, for such
locomotives in which a prime mover runs an electric generator
which supplies current to the electric motors for driving the
generator.
123, Internal-Combustion Engines, subclasses 143+, for
generator supplied ignition systems for internal combustion
engines.
310, Electrical Generator or Motor Structure, subclass 50
for portable or hand held dynamoelectric machines.
315, Electric Lamp and Discharging Devices: Systems,
subclass 33 for miscellaneous portable self-contained
generator supplied lamp and electric space discharging
devices lamps and electric space discharging devices which
have an electric generator structurally combined therewith so
as to form a unitary device.
361, Electricity: Electrical Systems and Devices, subclass
262 for portable self-contained electric igniting devices
such as cigar lighters.
362, Illumination, appropriate subclasses for articles, such
as firearms, canes, etc., which include an electric lamp and
the source of potential therefor to make a portable
self-contained illuminated article; subclass 193 for
bicycle driven generators for supplying a lamp; and
subclasses 157+ for portable self-contained electric lamp,
such as flashlights.
441, Buoys, Rafts, and Aquatic Devices, subclasses 13+ for
illuminated buoys.
455, Telecommunications, subclass 351 for portable radio
receivers.
607, Surgery: Light, Thermal and Electrical Application,
subclass 149 for electrosurgical devices to be worn on the
person, as belts, bands, etc., which include an electric
generator (usually a battery) and subclasses 115+ for
portable self-contained medical apparatus for applying
electric energy to the body and including an electric
generator.
Subclass:
2
This subclass is indented under the class definition. Subject
matter wherein the generation of electric energy does not
involve electromagnetic induction.
(1) Note. See the class definition, Lines With Other
Classes, "Generating Systems With nonmagnetic Generator" for
a statement as to the type of systems included in this
subclass.
Subclass:
3
This subclass is indented under the class definition. Subject
matter wherein the generator has a moving generating means
which may be either the armature or field structure which has
a reciprocating motion.
(1) Note. The motion may be either rectilinear or
curvilinear.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclasses 15+
for reciprocating generator structure, and subclasses 36+
for oscillating generator structure.
318, Electricity: Motive Power Systems, subclasses 119+, for
reciprocating or oscillating type of motor systems.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, subclasses 255+ for electromagnets with
reciprocating armature.
Subclass:
4
This subclass is indented under the class definition. Subject
matter wherein the generator is provided with a flywheel or
depends on the use of a massive moving element to give the
moving element a high inertia characteristic.
(1) Note. The usual purpose of the arrangements of this
subclass is to minimize minor deviations of the speed of the
moving element from its average value.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclasses 572+, for
flywheel structure.
318, Electricity: Motive Power Systems, subclass 150 for
generator fed motor systems with flywheel on generator or
motor and subclass 161 for motors having flywheels or other
massive rotary members.
Subclass:
5
This subclass is indented under the class definition. Subject
matter wherein the polarity of the output voltage of the
generator is controlled.
(1) Note. The control may be either to maintain a
predetermined polarity of the output voltage or to reverse
the polarity of the output voltage.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 140, for
generator polarity control in generator fed motor systems.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass especially subclass 165
and Dig. 15 for polarity monitoring or control in a battery
or capacitor charging or discharging system.
Subclass:
6
This subclass is indented under subclass 5. Subject matter
wherein the generator polarity is controlled by controlling
the generator excitation.
(1) Note. Such excitation control may take the form of: a.
Reversal of field current. b. Changing the relative strengths
of opposed field windings. c. Alternate energization of
opposed field windings.
Subclass:
7
This subclass is indented under the class definition. Subject
matter wherein both the generator and the load circuit
(armature circuit) are controlled.
(1) Note. For a statement of the generator and load circuit
control systems included and excluded from this class, see
the class definition, especially Lines With Other Classes,
"Load in Output Circuit Recited by Name Only etc."
SEE OR SEARCH THIS CLASS, SUBCLASS:
45 for systems within the class definition where the
generator is provided with a plurality of diverse generator
control means (i.e., control for the armature and fields).
89 for systems within the class definition where the
generator control includes means to control the armature or
primary circuit of the generator.
Subclass:
8
This subclass is indented under subclass 7. Subject matter
wherein the load circuit control includes load circuit making
and breaking.
SEE OR SEARCH CLASS:
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for voltage regulation or
circuit making or breaking in a battery or capacitor charging
or discharging system.
Subclass:
9
This subclass is indented under the class definition. Subject
matter wherein the generator is driven by two or more driving
means.
(1) Note. Where one of the driving means is a nonelectric
prime mover and the characteristics of the prime mover are
significant or the prime mover control is set forth, the
subject matter is to be found in Class 290, regardless of the
characteristics or operation of the other driving means. See
Lines With Other Classes, "Prime Mover Driven Generator
Systems" of the class definition for a statement of the
general line with Class 290.
(2) Note. See Lines With Other Classes, "Nonelectrical
Means Controlling the Generator" of the class definition for
a reference to the nonelectric generator control systems for
electric generators and/or the generator driving means
included in this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 14+ for systems within the class definition
having combined control of the generator and the driving
means.
subclasses 17+ for systems within the class definition
having automatic control of the generator or driving means.
subclasses 38+ for systems within the class definition
having driving means control.
SEE OR SEARCH CLASS:
290, Prime Mover Dynamo Plants, see Note (1) above.
Subclass:
10
This subclass is indented under the class definition. Subject
matter wherein means are provided for starting and/or
stopping the generator. This involves the physical starting
and putting the machine into service or taking it out of
service and stopping it.
SEE OR SEARCH CLASS:
192, Clutches and Power-Stop Control, appropriate subclasses,
for clutches, subclass 3.21, for a combination of vortex-flow
drive and clutch, subclasses 3.5+, for miscellaneous
mechanism for the joint control of a transmission mechanism
and a clutch, subclasses 226 for the joint control of
transmission connection and braking mechanism, subclasses
12+, for mechanism for applying a clutch and brake
alternately to drive and retard or stop a mechanism,
subclasses 116.5+, for miscellaneous mechanism, usually
automatic, for stopping a machine.
290, Prime-Mover Dynamo Plants, subclasses 34+ and
subclasses 40+, for nonelectric prime mover driven generator
plants having means for physically starting and/or stopping
the generator.
307, Electrical Transmission or Interconnection Systems,
subclasses 85+ for interconnection systems having means for
connecting or disconnecting a plurality of electrical
generators.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system that employs a generator.
477, Interrelated Power Delivery Controls, Including Engine
Control, for joint control of a motor and a transmission,
clutch, or brake.
Subclass:
11
This subclass is indented under subclass 10. Subject matter
wherein the starting or stopping of the generator is
initiated automatically in response to predetermined
conditions. Sensing means is provided which is responsive to
the condition or conditions and initiates the activity of
either starting or stopping.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17 for systems within the class definition having automatic
control of the generator or driving means.
SEE OR SEARCH CLASS:
290, Prime-Mover Dynamo Plants, subclasses 40+, for
nonelectric prime mover driven generator plants having
automatic means for physical starting and/or stopping of the
generator.
310, Electrical Generator or Motor Structure, subclasses 86+
for systems wherein a generator is started and connected in
circuit with other generators in response to a condition,
such as load demand.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system that employs a generator.
Subclass:
12
This subclass is indented under subclass 10. Subject matter
wherein a clutching means between the generator and driving
means is provided for connecting or completely disconnecting
the drive connection.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 40+ which relates to arrangements for
controlling a generator by controlling the power transmitting
mechanism including slip clutches (e.g., magnetic) which do
not completely disconnect.
SEE OR SEARCH CLASS:
192, Clutches and Power-Stop Control, subclasses .03-.098
for mechanism for joint control of a nonelectric motor and
clutch, subclass .02 where the motor is electric, and
subclasses 30+ for mechanical clutches.
310, Electrical Generator or Motor Structure, subclasses 92+
for magnetic clutches.
Subclass:
13
This subclass is indented under subclass 10. Subject matter
wherein the driving means for the generator is an electric
motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39 for miscellaneous systems within the class definition
having driving means control for an electric motor driving a
generator.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 113
for structurally united motor generator sets.
318, Electricity: Motive Power Systems, subclasses 430-558
for electric motor starting and/or stopping systems.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system that employs a generator.
Subclass:
14
This subclass is indented under the class definition. Subject
matter wherein the system is provided with controls for both
the generator and the driving means.
(1) Note. See the class definition, especially Lines With
Other Classes, "Prime Mover Driven Generator Systems--a.
Electric Motor Driven Generator Systems" for a statement of
the motor generator systems included and excluded from Class
322.
(2) Note. See Lines With Other Classes, "Nonelectrical
Means Controlling the Generator" of the class definition for
a reference to the nonelectric control means for electric
generator and/or the generator driving means included in this
class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 10+ for systems within the class definition
having means for the physical starting and/or stopping of the
generator.
subclasses 17+ for systems within the class definition
having automatic control of the generator or the driving
means.
subclasses 38+ for miscellaneous systems within the class
definition having driving means control.
subclasses 44+ for miscellaneous systems within the class
definition having generator control.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 140+, for
generator fed motor systems having generator control wherein
the generator control includes generator and driving means
control.
Subclass:
15
This subclass is indented under subclass 14. Subject matter
wherein the control of the generator and the driving means is
performed simultaneously.
(1) Note. Usually a single handle or other operating device
operates both control devices.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 140+, for
generator fed motor systems having generator control wherein
the generator control includes simultaneous generator and
driving means control.
Subclass:
16
This subclass is indented under subclass 15. Subject matter
wherein the generator driving means is an electric motor.
(1) Note. See the class definition, especially Lines With
Other Classes, "Prime Mover Driven Generator Systems--a.
Electric Motor Driven Generator Systems" for a statement as
to the electric motor driven generator systems included and
excluded from Class 322.
SEE OR SEARCH THIS CLASS, SUBCLASS:
13 for systems under the class definition having means for
the physical starting and/or stopping of the generator where
the driving means for the generator is an electric motor.
39 for miscellaneous systems within the class definition
having an electric motor for driving the generator.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 140+, for
generator fed motor systems wherein the generator control
includes simultaneous generator and electric motor driving
means control.
Subclass:
17
This subclass is indented under the class definition. Subject
matter wherein the generator or driving means are provided
with automatic means so that either is controlled in response
to predetermined conditions. Sensing means are provided
which are responsive to the condition or conditions to
effectuate the control.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11 for automatic starting and/or stopping of the generator
in response to predetermined conditions.
38 for miscellaneous systems within the class definition
having driving means control.
44 for miscellaneous systems within the class definition
having generator control.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 141+, for
generator fed motor systems having automatic generator
control.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic regulation.
323, Electricity: Power Supply or Regulation Systems, for
miscellaneous voltage and phase control systems.
330, Amplifiers, appropriate subclasses, for amplifier
systems, generally, including those which may be used in the
automatic control of generators, particularly subclass 58 in
the amplifier systems of which the active element is a
rotating dynamoelectric machine.
Subclass:
18
This subclass is indented under subclass 17. Subject matter
wherein the automatic response means includes a time delay
means to delay the response.
(1) Note. The purpose of such arrangement is to prevent
unnecessary operation of the control device in response to
temporary short time deviations from the controlled
condition.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 142+, for
generator fed motor systems with control of the generator
responsive to predetermined conditions with time delay in the
response.
320, Electricity: Battery or Capacitor Charging or
Discharging, especially subclasses 155+ for a battery or
capacitor charging or discharging system with time control.
Subclass:
19
This subclass is indented under subclass 17. Subject matter
wherein the automatic control means include (1) means
responsive to the rate of change of a condition are provided
for modifying the response of a control device or (2) means
are provided for minimizing or eliminating the tendency of a
control device to hunt.
(1) Note. In most cases anti-hunt devices are responsive to
rate of change and most rate of change responsive devices are
used for anti-hunt purposes. However, the two devices may
have other applications.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 141+
for generator fed motor systems having generator control
including antihunt or rate of change, response, and
subclasses 611+, for electric motor position
servomechanisms.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic control
responsive to a rate of change of condition.
333, Wave Transmission Lines and Networks, subclass 19 for
differentiating or integrating networks of the passive type.
Subclass:
20
This subclass is indented under subclass 17. Subject matter
wherein the automatic control means include means responsive
to the power factor of the load circuit of the generator or
phase relationships therein.
SEE OR SEARCH CLASS:
323, Electricity: Power Supply or Regulation Systems,
subclasses 205-219 for power factor and phase control
systems.
Subclass:
21
This subclass is indented under subclass 17. Subject matter
wherein the control arrangement includes line drop
compensation means.
(1) Note. The line drop compensation means usually includes
an electrical equivalent of the load circuit so that the
current and voltage drops may be duplicated therein.
(2) Note. The control of this subclass permits control of
the generator and/or its driving means to maintain a
predetermined condition at a point in the load circuit
removed from the generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25 for systems within the definition of subclass 17 having
the automatic control means of other than the line drop
compensation type responsive to current and voltage.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclass 103 for line drop compensation systems, per se.
Subclass:
22
This subclass is indented under subclass 17. Subject matter
wherein the automatic control means are responsive to two or
more conditions.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 452+
for plural condition responsive electric motor systems.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic control
responsive to plural conditions.
323, Electricity: Power Supply or Regulation Systems,
subclasses 234-303, for automatic control of impedance
systems in response to plural conditions.
Subclass:
23
This subclass is indented under subclass 22. Subject matter
wherein the plural conditions to which the automatic control
means are responsive include an electrical condition.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 453+, for
electric motor systems responsive to plural conditions
including an electrical condition.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic control
responsive to plural conditions which include an electrical
condition.
323, Electricity: Power Supply or Regulation Systems,
subclasses 234-303, for automatic impedance control systems
responsive to plural conditions including an electrical
condition.
Subclass:
24
This subclass is indented under subclass 23. Subject matter
wherein the plural conditions to which the automatic control
means are responsive are electrical conditions.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 454+, for
electric motor systems responsive to plural electrical
conditions and subclass 143 for generator fed motor systems
having generator control responsive to plural conditions.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic control
responsive to plural conditions.
323, Electricity: Power Supply or Regulation Systems,
subclasses 234-303, for impedance systems responsive to
plural electrical conditions.
Subclass:
25
This subclass is indented under subclass 24. Subject matter
wherein the plural electrical conditions to which the
automatic control means are responsive are current and
voltage.
(1) Note. This subclass includes subject matter where the
plural conditions to which the automatic control means is
responsive is the product of current and voltage (power).
SEE OR SEARCH THIS CLASS, SUBCLASS:
20 for subject matter under subclass 17 where the automatic
control means is responsive to the product of voltage,
current and the cosine of the included angle.
21 for voltage and current responsive line drop compensation
systems for generator systems.
27 for subject matter under subclass 17 where the automatic
control means is controlled in response to the generator
current out-put. Where the generator voltage is
substantially constant, this may be considered to be a power
response.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 143 for
generator fed motor systems having generator control
responsive to voltage and current and subclass 455 for
electric motor systems responsive to voltage and current.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic control
responsive to voltage and current conditions.
323, Electricity: Power Supply or Regulation Systems,
subclasses 234-303, for automatic impedance systems
responsive to voltage and current.
Subclass:
26
This subclass is indented under subclass 17. Subject matter
wherein the automatic control means is responsive to light or
utilizes a photo-sensitive circuit.
SEE OR SEARCH CLASS:
250, Radiant Energy, subclasses 200+, and the classes and
subclasses specified in the Notes to the definition of these
subclasses for photocell controlled circuits and photocell
apparatus.
323, Electricity: Power Supply or Regulation Systems,
subclasses 221-902, for light responsive electric space
discharge device voltage magnitude control systems.
Subclass:
27
This subclass is indented under subclass 17. Subject matter
wherein the automatic control means is responsive to
generator current output.
(1) Note. Where the generator voltage is substantially
constant this may be considered to be a power response. For
actual power output response (e.g., voltage and current
product or the product of voltage, current and cosine of
included angle), search this class, subclasses 20 and 25.
SEE OR SEARCH THIS CLASS, SUBCLASS:
20 for automatic control in response to phase relationships.
See Note 1 above.
25 for automatic control in response to voltage and current.
See Note 1 above.
SEE OR SEARCH CLASS:
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic control
responsive to a current condition.
323, Electricity: Power Supply or Regulation Systems,
subclasses 220-354, for constant current systems.
Subclass:
28
This subclass is indented under subclass 17. Subject matter
wherein the automatic control means is controlled in response
to the generator output voltage or the voltage of the circuit
supplied by the generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
21 for generator systems under subclass 17 wherein the
control arrangement includes line drop compensation means
(i.e., usually an electrical equivalent of the load circuit
so that the current and voltage drops may be duplicated
therein) so as to permit control of the generator system to
maintain a predetermined condition at a point in the load
circuit remote from the generator.
25 and the subclasses specified in the notes to the
definition of that subclass for generator systems under
subclass 17 having the automatic control means responsive to
current and voltage.
SEE OR SEARCH CLASS:
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for a battery or capacitor
charging or discharging system with automatic control
responsive to a voltage condition.
323, Electricity: Power Supply or Regulation Systems,
subclasses 220-354, for constant voltage systems.
Subclass:
29
This subclass is indented under subclass 17. Subject matter
wherein the automatic control of the generator is in response
to the speed or frequency of the generator.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclass 87 for systems for the interconnection of plural
generators upon attainment of a predetermined frequency
condition.
324, Electricity: Measuring and Testing, subclasses 160+
for speed measuring, and subclasses 76.39+ for frequency
measuring.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for source regulation in a
battery or capacitor charging or discharging system.
361, Electricity: Electrical Systems and Devices, subclasses
236+ for speed responsive systems.
388, Electricity: Motor Control Systems, art collections
924+ for running-speed control systems including a feedback
device responsive to the speed of the motor.
Subclass:
30
This subclass is indented under subclass 29. Subject matter
wherein the speed or frequency responsive device includes a
centrifugal or fly-weight governor.
SEE OR SEARCH CLASS:
73, Measuring and Testing, subclasses 488+ for a speed
responsive device, per se.
200, Electricity: Circuit Makers and Breakers, subclass 80
for centrifugal switches.
388, Electricity: Motor Control Systems, art collections
924+ for running-speed control systems including a
centrifugal feedback device responsive to the speed of the
motor.
Subclass:
31
This subclass is indented under subclass 29. Subject matter
wherein a tachometer device is utilized to produce an energy
output which is a measure of the speed and such output is
used to provide the control.
(1) Note. Although the tachometer device is in most cases
an electric generator whose output voltage or frequency is
proportional to the speed, other devices are also used (e.g.,
pumps etc.).
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, appropriate
subclasses for tachometer generators, per se.
324, Electricity: Measuring and Testing, subclasses 160+
for speed measuring systems using a tachometer generator.
361, Electricity: Electrical Systems and Devices, subclasses
236+ for speed responsive systems using a tachometer
generator.
388, Electricity: Motor Control Systems, subclasses 800+
for running-speed control systems including a feedback device
responsive to the speed of the motor.
Subclass:
32
This subclass is indented under subclass 29. Subject matter
wherein a frequency responsive device or network is utilized
to produce a control dependent on the speed of frequency for
controlling the generator or driving means.
(1) Note. The frequency responsive device or network may
take such diverse forms as a synchronous motor, a frequency
meter or a tuned circuit.
SEE OR SEARCH CLASS:
324, Electricity: Measuring and Testing, subclass 76.39 for
electric frequency measuring.
331, Oscillators, subclasses 1+ for electrical oscillation
generating systems having a phase or frequency sensing means
for automatically stabilizing the frequency of the generated
oscillations.
388, Electricity: Motor Control Systems, subclasses 800+,
especially 805, 814 and 820 for running-speed control systems
including frequency responsive feedback devices or networks.
Subclass:
33
This subclass is indented under subclass 17. Subject matter
wherein the automatic control of the generator or driving
means is in response to temperature or thermal conditions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2 for systems within the class definition which have a
thermoelectric generator.
SEE OR SEARCH CLASS:
136, Batteries: Thermoelectric and Photoelectric, subclasses
4+ for the structure of thermoelectric generators.
318, Electricity: Motive Power Systems, subclasses 471+
for thermally responsive motor control.
320, Electricity: Battery or Capacitor Charging or
Discharging, subclasses 150+ for battery charging with
detection of a thermal condition.
323, Electricity: Power Supply or Regulation Systems,
subclass 369, for thermal responsive impedance systems in
general.
324, Electricity: Measuring and Testing, subclass 92, 104
and 106 for thermally actuated electric meters.
337, Electricity: Electrothermally or Thermally Actuated
Switches, appropriate subclasses for electrothermally and
thermally actuated switches.
340, Communications: Electrical, subclasses 584+ for
electric signaling systems automatically responsive to
temperature.
374, Thermal Measuring and Testing, subclasses 179+ for a
thermoelectric sensor in a temperature measuring system.
388, Electricity: Motor Control Systems, art collection 934
for running-speed control systems including a feedback device
responsive to a thermal condition.
Subclass:
34
This subclass is indented under subclass 33. Subject matter
wherein the thermal condition or conditions to which the
control is responsive exists in the generator and/or driving
means.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 473 for
motor control responsive to thermal conditions of the motor.
Subclass:
35
This subclass is indented under subclass 17. Subject matter
wherein the generator or driving means is automatically
controlled in response to fluid pressure.
(1) Note. The fluid pressure may be wind pressure.
(2) Note. Where fluid pressure is varied in response to
some other condition, the other condition should be searched.
For example, a generator system controlled by means of a
voltage responsive hydraulic arrangement should be searched
in subclass 28.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 see note 1 above.
SEE OR SEARCH CLASS:
388, Electricity: Motor Control Systems, art collections
929+ for running-speed or acceleration control systems
including a feedback device responsive to fluid pressure.
Subclass:
36
This subclass is indented under subclass 17. Subject matter
wherein the automatic control arrangement includes means for
setting up a reference standard with means for comparing the
condition to be controlled with the reference standard. The
control system is usually responsive to the difference
between the reference standard and the condition.
(1) Note. The particular condition set up by the standard
is not material in this subclass. If the particular
condition (e.g., voltage, frequency, etc.) is significant,
the preceding subclasses under subclass 17 relating to the
particular condition should be searched.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37 for systems under subclass 17 having the automatic
control means controlled in accordance with electrical
conditions in a circuit other than the circuit in which the
generator is connected.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 449+, for
electric motor control having automatic control with respect
to a standard, master or reference device.
Subclass:
37
This subclass is indented under subclass 17. Subject matter
wherein the generator or driving means is controlled in
accordance with electrical conditions in a circuit other than
that in which the generator is connected.
(1) Note. In most cases the generator is a control element
which controls some device which is connected to the circuit:
(e.g., the generator may be an exciter controlled in
accordance with the output voltage of a main generator or the
generator may be an amplifier device for controlling a motor
in accordance with its load).
SEE OR SEARCH THIS CLASS, SUBCLASS:
36 for generator systems under subclass 17 wherein the
automatic control arrangement includes means for setting up a
reference standard with means for comparing the condition to
be controlled with the reference standard.
subclasses 59+ for exciter generator control.
78 for generator control wherein a generator provides an
auxiliary electromotive force in the field circuit of a main
generator.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 530, for
motor field circuit control having plural sources wherein a
generator is one of the sources and is controlled in
accordance with an electrical condition of the motor and 521+
for exciter generator control of a motor field circuit.
Subclass:
38
This subclass is indented under the class definition. Subject
matter wherein the generator driving means is controlled to
control the system.
(1) Note. See Lines With Other Classes, "Nonelectrical
Means Controlling the Generator" of the class definition for
a reference to the nonelectrical control means for the
generator driving means included in this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9 for generator systems within the class definition having a
plurality of driving means.
subclasses 10+ for generator systems within the class
definition having means to control the generator driving
means for starting and/or stopping the generator (putting the
generator into and/or out of service).
subclasses 14+ for this subject matter wherein the system
is provided with controls for both the generator and the
driving means.
subclasses 17+ for this subject matter where the system
includes automatic control of the driving means.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, for prime
mover driven generator supplied electric lamp and gas or
vapor discharge systems, the system including control means
for the prime mover.
Subclass:
39
This subclass is indented under subclass 38. Subject matter
wherein the generator is driven by an electric motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9 for generator systems within the class definition which
have the generator driven by a plurality of electric motors.
16 for this subject matter where the system includes
controls for both the electric motor and the generator.
SEE OR SEARCH CLASS:
363, Electric Power Conversion Systems, subclasses 102+, 150,
and 174+ for dynamoelectric machine converter systems which
may have electric motor driving means control or its
equivalent. For the electric motor driven generator systems
which are considered to be conversion systems, see "Prime
Mover Driven Generator Systems--a. Electric Motor Driven
Generator Systems" of the class definition of this class
(322).
Subclass:
40
This subclass is indented under the class definition. Subject
matter wherein a power transmitting mechanism is interposed
between the generator and driving means and the transmitting
mechanism is controlled to control the energy supplied to the
generator by the driving means.
(1) Note. See Lines With Other Classes, "Nonelectrical
Means Controlling the Generator" of the class definition for
a reference to the nonelectrical means for controlling the
power transmission means for the generator included in this
class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 10+ for this subject matter where the system
includes means to control power transmission mechanism for
starting and/or stopping the generator (putting the generator
into and/or out of service), see indented subclass 12 where
the system includes a clutching means between the generator
and driving means for connecting or completely disconnecting
the drive connection.
SEE OR SEARCH CLASS:
60, Power Plants, subclasses 325+, for a fluid transmission,
per se, in which a driven fluid impeller supplies motive
fluid to an output motor.
192, Clutches and Power-Stop Control, appropriate subclasses
for clutches and mechanism involving the joint control of the
application of power and brake or other stopping means.
310, Electrical Generator or Motor Structure, subclasses 92+
for magnetic clutches.
475, Planetary Gear Transmission Systems or Components, for
planetary gearing power transmissions.
476, Friction Gear Transmission Systems or Components,
subclass 11 for electric or magnetic control of friction
gear transmissions.
Subclass:
41
This subclass is indented under subclass 40. Subject matter
wherein the power transmitting mechanism is of the friction
type.
SEE OR SEARCH CLASS:
192, Clutches and Power-Stop Control, subclasses .02-.098,
for mechanism for the joint control of a motor and clutch,
subclass 3.5, for mechanism for the joint control of the
power transmission and a brake, subclasses 12+, for mechanism
having a clutch and brake applied alternately to drive and
retard the mechanism, subclasses 30+, for clutches, see
indented subclasses 103+, for speed responsive clutches.
475, Planetary Gear Transmission Systems or Components,
subclasses 183+, for frictional planetary gearing.
476, Friction Gear Transmission Systems or Components,
subclass 11 for electric or magnetic control of friction
gear transmissions.
Subclass:
42
This subclass is indented under subclass 40. Subject matter
wherein the friction type power transmitting mechanism is in
the form of a belt drive.
SEE OR SEARCH CLASS:
474, Endless Belt Power Transmission Systems or Components,
appropriate subclasses for an endless belt power
transmission.
Subclass:
43
This subclass is indented under subclass 42. Subject matter
wherein the belt drive is controlled by controlling belt
slip.
SEE OR SEARCH CLASS:
474, Endless Belt Power Transmission Systems or Components,
appropriate subclasses for variable speed belt drive; and
subclasses 101+ for means for adjusting belt tension.
Subclass:
44
This subclass is indented under the class definition. Subject
matter and not classified in one of the preceding subclasses
wherein the generator system is controlled by controlling the
generator.
(1) Note. See Lines With Other Classes, "Nonelectrical
Means Controlling the Generator" of the class definition
for a reference to the nonelectric control system for
generators included in this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2 for this subject matter where the electric generator is
not of the electromagnetic induction type.
3 for this subject matter where the generator is a
reciprocating and/or oscillating type generator.
4 for this subject matter where the generator is provided
with flywheels or massive moving parts.
subclasses 5+ for this subject matter where the polarity of
the output voltage of the generator is controlled.
7 for this subject matter where the system includes control
of the generating means and control of the output circuit.
9 for this subject matter where the generator is provided
with a plurality of driving means.
subclasses 10+ for this subject matter where means are
provided for stopping or starting the generator (putting the
generator into service or stopping the generator).
subclasses 14+ for this subject matter where there is also
control of the generator driving means.
subclasses 17+ for this subject matter where the system
includes automatic control means for the generator.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclasses
302+, and the subclasses specified in the notes to the
definitions of subclasses for generator supplied lamps and
gas or vapor discharge device systems, the generator being
provided with control means.
330, Amplifiers, particularly subclass 58 for amplifiers
having a dynamoelectric machine as the active element.
Subclass:
45
This subclass is indented under subclass 44. Subject matter
wherein the generator control is effectuated by a plurality
of diverse controls (e.g., combined control by controlling
field structure and field excitation).
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 7+ for this subject matter where the systems
include control of the generating means and control of the
armature circuit.
subclasses 17+ for this subject matter where the system
includes automatic control means for the generator.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 491, for
combined motor circuit and motor structure controls and
subclass 493 for combined armature and field circuit
controls.
Subclass:
46
This subclass is indented under subclass 44. Subject matter
wherein the generator field structure combines permanent
magnet and wound field structure.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 181
for structure of a generator having both a permanent magnet
and a wound field structure.
Subclass:
47
This subclass is indented under subclass 43. Subject matter
wherein the generator is an induction generator.
(1) Note. An induction generator is a dynamoelectric
machine having the same structure as an induction motor. It
operates as a generator when connected to a line which can
supply a leading current component for exciting the machine
and it is driven at a greater than synchronous speed. Since
it is structurally identical with an induction motor, Classes
172 and 318 should be searched for structural features.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclasses 166+
for induction motor structure.
318, Electricity: Motive Power Systems, subclasses 727+
for induction motor systems. See (1) Note above.
Subclass:
48
This subclass is indented under subclass 44. Subject matter
wherein the generator is an acyclic or homopolar type
generator.
(1) Note. An acyclic or homopolar generator is a generator
in which the voltage generated in the active conductors
maintains the same direction with respect to those
conductors. Such machines are of the commutatorless type.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 178
for the structure of a homopolar or acyclic generator.
318, Electricity: Motive Power Systems, subclass 253, for
homopolar motor systems.
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, subclasses 100+ for plasma generating and control
devices, yielding or intended to yield sustained nuclear
(fusion) reactions.
Subclass:
49
This subclass is indented under subclass 44. Subject matter
wherein the generator is controlled by controlling the
structure of parts which form at least a portion of the
magnetic circuit of the generator.
(1) Note. See Lines With Other Classes, "Nonelectrical
Means Controlling the Generator" of the class definition for
a reference to the nonelectric control means for generator
structure which is excluded from this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3 for systems within the class definition where the
generator has a moving generating means which may be the
armature or the field structure which has a reciprocating
motion.
57 for generator control under subclass 44 where the
generator control means includes means for saturating the
generator magnetic structure by means of a winding which is
in noninductive relationship to the armature or field winding
of the generator.
subclasses 59+ for generator control under subclass 44
where the generator is controlled by controlling an
excitation winding. See indented subclasses 59+, for
generator control by means of a variable length field
winding.
subclasses 89+ for generator control under subclass 44
where the generator is controlled by controlling the armature
circuit.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 191
for adjustable magnetic structure for generators.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
388, Electricity: Motor Control Systems, subclasses 835+
for running-speed control systems in which motor structure is
altered.
Subclass:
50
This subclass is indented under subclass 49. Subject matter
wherein the generator magnetic structure includes a magnetic
shunt for the field flux. Such shunt diverts the field flux
away from the armature.
Subclass:
51
This subclass is indented under subclass 49. Subject matter
wherein the generator magnetic structure control relates to
the rotor element or rotating member of the generator.
(1) Note. While the rotor element usually is the armature
in a direct current machine, it may be either the armature or
field structure of an alternating current machine depending
on its design.
Subclass:
52
This subclass is indented under subclass 49. Subject matter
wherein the generator magnetic structure control relates to
the stator element or the portion of the generator which
contains the stationary (nonrotary) parts of the magnetic
circuit.
(1) Note. While the stator element usually is the field
structure in a direct current machine, it may be either the
armature or field structure of an alternating current machine
depending on its design.
Subclass:
53
This subclass is indented under subclass 44. Subject matter
where the generator has one or more pairs of load brushes and
an auxiliary (or third) brush intermediately positioned
between the load brushes with one of the generator windings
(field or armature) or a portion thereof or a circuit
connected between the auxiliary brush and one load brush.
(1) Note. This subclass includes systems having a third
brush type generator with the field winding or a field
winding connected between the auxiliary (or third) brush and
one load brush. Also included are generator systems having
the armature winding or a portion thereof connected to a
short circuit between the auxiliary (or third brush) and one
load brush.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 54+ for generator systems within the class
definition where the generator control includes means to
adjust the position of the generator brushes.
subclasses 91+ for generator systems within the class
definition where the generator is controlled by short
circuiting the armature winding or a portion thereof, see
indented subclass 92 where the generator is provided with a
pair of auxiliary brushes and the short circuit is between
the auxiliary brushes (cross-field generators).
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclass 9.1 for third brush generators used in electric
systems on vehicles.
310, Electrical Generator or Motor Structure, subclass 148
for dynamoelectric machines having a third brush or
additional sets of brushes.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
Subclass:
54
This subclass is indented under subclass 44. Subject matter
wherein the generator control includes means to adjust the
current collecting mechanism (brushes).
(1) Note. This subclass includes adjusting the position of
the brush and brush lifting.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 240
for brush lifters for dynamoelectric machines, and subclass
241 for circumferential adjustment of the brushes for a
dynamoelectric machine.
318, Electricity: Motive Power Systems, subclass 292, for
motor reversing systems by brush shifting and subclass 541
for motor control by brush or other current collector or
transfer means control.
388, Electricity: Motor Control Systems, subclass 836 for
running-speed control systems in which brushes are moved.
Subclass:
55
This subclass is indented under subclass 54. Subject matter
wherein the current collecting mechanism control includes
circumferential movement of the mechanism.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 241
for circumferential adjustment of the brushes for a
dynamoelectric machine.
318, Electricity: Motive Power Systems, subclass 292 for
motor reversing by circumferential movement of brushes, and
subclass 541, for motor control by circumferential movement
of brushes.
388, Electricity: Motor Control Systems, subclass 836 for
running-speed control systems in which brushes are moved.
Subclass:
56
This subclass is indented under subclass 55. Subject matter
wherein the circumferentially movable current collecting
mechanism is moved continuously.
Subclass:
57
This subclass is indented under subclass 44. Subject matter
wherein the generator control includes means for saturating
at least a portion of the generator magnetic structure
without introducing therein a magneto-motive force which
either aids or opposes the magneto-motive force produced by
the armature or field windings.
(1) Note. The saturating means is usually a winding which
is in inductive relationship to the magnetic structure to be
saturated, and which is in noninductive relationship to the
armature and field windings.
SEE OR SEARCH THIS CLASS, SUBCLASS:
49 for generator systems within the class definition where
the generator is controlled by controlling the structure of
parts which form at least part of the magnetic circuit of the
generator.
SEE OR SEARCH CLASS:
323, Electricity: Power Supply or Regulation Systems,
subclass 249, 302, 310, and 329, for saturable reactors.
Subclass:
58
This subclass is indented under subclass 44. Subject matter
wherein the system includes means for suppressing,
eliminating or minimizing undesired frequencies.
(1) Note. The suppressing, eliminating or minimizing means
may be in any of the generator circuits (excitation circuit,
armature circuit, etc.).
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, subclasses 167+
for wave filter networks.
Subclass:
59
This subclass is indented under subclass 44. Subject matter
wherein the generator is controlled by controlling an
excitation winding or an excitation winding circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6 for generator systems within the class definition which
are provided with means to control the polarity of the
generator by controlling the excitation of the generator.
45 for this subject matter where the generator is controlled
by a plurality of diverse controls (e.g. controlling field
structure and field excitation).
46 for generator control systems under subclass 44 where the
generator field structure combines permanent magnet and wound
field structure.
48 for generator control systems under subclass 44 where the
generator is an acyclic or homopolar generator with means to
control an excitation winding or an excitation winding
circuit.
subclasses 49+ for generator control systems under subclass
44 where the generator is controlled by controlling the
structure of the parts which form the magnetic circuit of the
generator.
53 for generator control systems under subclass 44 where the
generator has an odd number of brushes (3rd brush type)
including such systems where the generator has a field
winding connected between the auxiliary (3rd) brush and one
of the load brushes.
subclasses 54+ for generator control systems under subclass
44 where the generator control includes means to adjust the
current collection mechanism (brushes).
57 for generator control systems under subclass 44 where the
generator control includes means for saturating at least a
portion of the generator structure by means of a winding
which is in noninductive relationship to the armature and
field winding.
58 for generator control systems under subclass 44 where the
system includes means (such as a filter) for eliminating,
suppressing or minimizing undesired frequencies.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, and subclasses 521+,
for motor field circuit control, subclasses 710+ for
synchronous motor field excitation removal; subclasses 712+
for synchronous motor field excitation application;
subclasses 716+ for synchronous motor field circuits.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
330, Amplifiers, particularly subclass 58 for amplifier
systems whose active element is a rotating dynamoelectric
machine.
388, Electricity: Motor Control Systems, subclass 843 and
849+ for field circuit acceleration control systems.
Subclass:
60
This subclass is indented under subclass 59. Subject matter
wherein a substitute or auxiliary source of voltage is
provided to energize the excitation circuit of the generator
during the starting period so that the generator can "build
up" its output voltage means being provided for discontinuing
the supply to the excitation circuit from the substitute or
auxiliary source when the generator has attained a
predetermined output voltage.
SEE OR SEARCH THIS CLASS, SUBCLASS:
10 for generator systems within the class definition where
means are provided for physical starting and putting the
generator into service.
28 for generator systems within the class definition having
automatic control means responsive to the generator output
voltage for discontinuing the supply of the voltage to the
excitation circuit when the generator output voltage has
attained a predetermined value.
86 for generator systems under subclass 59 having the
generator excitation circuit supplied from two or more
sources of electric energy, both sources usually being used
during the normal operation of the generator.
Subclass:
61
This subclass is indented under subclass 59. Subject matter
wherein the current supplied to the excitation circuit is
alternating current.
(1) Note. Where alternating current is rectified and the
rectified current is supplied to the field winding, this
patent is not classified in this subclass but will be found
in subclass 79.
SEE OR SEARCH THIS CLASS, SUBCLASS:
79 see note 1, above.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 244+, for
alternating current commutating motors, subclasses 246+, for
alternating current series motors, subclass 700, for
synchronous motor alternating current energized field
circuits; subclasses 731+ for induction motors having a
secondary winding energized also by alternating current;
subclass 737 for induction motors having an added primary
winding energized by induction from a secondary motor
winding.
363, Electric Power Conversion Systems, subclasses 174+ for
dynamoelectric frequency converter systems wherein the
converter is excited with alternating current.
Subclass:
62
This subclass is indented under subclass 59. Subject matter
where the generator has a plurality of poles, the generator
or the excitation circuit being designed so that the
generator may be operated as a generator having one number of
sets of poles or as a generator having another and different
number of sets of poles.
(1) Note. For example, the generator may be provided with
eight poles, the generator or the excitation circuit being
arranged so that the generator may be operated as an eight
pole generator or a four pole generator.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 704 for
plural pole type synchronous motors, subclasses 773+ for
plural pole type induction motors, and subclass 524 for
plural pole type motor systems.
Subclass:
63
This subclass is indented under subclass 59. Subject matter
wherein the generator is provided with more than one field
winding.
(1) Note. A plurality of windings connected in series or
parallel to produce only one magnetic field is considered to
be only a single field winding. To be classified in this or
the indented subclasses, the generator should have a
plurality of windings connected in circuit to produce a
plurality of different magnetic fields. One of the windings
may produce a magnetic field which opposes the field produced
by another winding in indented subclass 64.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57 for generator systems under subclass 44, where the
generator is provided with a winding for saturating at least
a portion of the generator magnetic structure without
introducing a magneto-motive force which either aids or
opposes the magneto-motive force produced by the field or
armature winding.
62 for generator systems under subclass 59, where the field
windings or excitation circuits are designed so that the
generator may be operated as either a generator having one
number of sets of poles or as a generator having another and
different number of sets of poles (i.e., either an 8-pole or
a 4-pole generator).
SEE OR SEARCH CLASS:
310, Electric Generator or Motor Structure, subclasses 184+
for dynamoelectric machine structure having a plurality of
field or excitation windings.
315, Electric Lamp and Discharge Devices: Systems, subclasses
304+, for electric lamp and gas or vapor discharge device
systems having the supply generator supplied with a plurality
of fields for regulating the system.
318, Electricity: Motive Power Systems, subclasses 297+, for
motor reversing systems having plural field windings, and
subclasses 523+, for motor control systems having plural
field windings, subclasses 700+ for synchronous motor systems
having plural field windings, particularly subclasses 716+
for field circuits of synchronous motors.
320, Electricity: Battery and Condenser Charging and
Discharging, subclass 65 for generation systems for battery
charging having plural field windings.
388, Electricity: Motor Control Systems, subclasses 801+,
803+ and 826+ for running-speed control systems for motors
with more than one field winding, and 843 and 849+ for
acceleration control systems for motors with more than one
field winding.
Subclass:
64
This subclass is indented under subclass 63. Subject matter
wherein the magnetomotive force of at least one field winding
is opposed to the magnetomotive force of at least one other
field winding.
(1) Note. Where the generator includes a plurality of field
windings, some of which are opposed and others aid, the
subject matter is found in this subclass.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 188
for dynamoelectric machines having plural differentially
related field windings.
318, Electricity: Motive Power Systems, subclass 525, for
motor systems wherein the motor is provided with plural
differentially related field windings.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
Subclass:
65
This subclass is indented under subclass 63. Subject matter
wherein the generator is provided with interpole or
commutating pole windings.
(1) Note. An interpole or commutating pole is an auxiliary
pole member placed between the main pole pieces of a
commutating machine. Its exciting winding carries a current
proportional to the load current and produces a magnetomotive
force which minimizes or eliminates sparking at the brushes.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 186
for dynamoelectric machines having interpole or commutating
pole winding structure.
Subclass:
66
This subclass is indented under subclass 63. Subject matter
wherein the plural field windings include compensating
windings.
(1) Note. Compensating windings are windings placed in
slots in the pole faces of the generator pole pieces which
produce a magnetomotive force equal and opposite to that
produced by the armature and so prevent field distortion.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 186
for dynamoelectric machines having compensating winding
structure.
Subclass:
67
This subclass is indented under subclass 59. Subject matter
wherein the excitation of the generator is produced by a
series field winding.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 63+ for this subject matter where the generator
has other field windings in addition to the series field
winding.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 246+, for
series motor systems.
Subclass:
68
This subclass is indented under subclass 59. Subject matter
wherein the excitation of the generator is controlled by
short circuiting a field winding.
SEE OR SEARCH THIS CLASS, SUBCLASS:
50 for generator control under subclass 44 where the
generator is provided with a magnetic shunt to shunt the
field flux from the armature.
71 for generator control where only a portion of the field
winding is short circuited so that the generator is
controlled by varying the length of a field winding.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 528, for
motor control with means to short circuit a field winding and
subclass 299 for motor reversing control with means for short
circuiting one or more field windings.
Subclass:
69
This subclass is indented under subclass 59. Subject matter
wherein the generator excitation is controlled by
interrupting the supply of voltage to a field winding by
means of a circuit maker and breaker.
SEE OR SEARCH THIS CLASS, SUBCLASS:
54 for generator control under subclass 44 where the supply
of voltage to the excitation circuit is interrupted by
lifting the generator brushes.
subclasses 72+ for generator control under subclass 59
where the excitation circuit is controlled by means of an
electric space discharge device, vacuum tube gas vapor tube,
or arc which may at times interrupt the supply of voltage to
a field winding.
83 for generator control under subclass 59 where the
excitation circuit is controlled by short circuiting a
resistor in the excitation circuit, thereby varying the flow
of current to a field winding.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclass 104 for electrical systems which include therein an
electromagnet or other highly inductive device.
318, Electricity: Motive Power Systems, subclasses 710+
for synchronous motors having field circuit control by
breaking the field supply circuit.
361, Electricity: Electrical Systems and Devices, subclasses
52+ for safety and protection systems where the source of
energy is controlled to control an improper operating
condition (e.g., line fault).
Subclass:
70
This subclass is indented under subclass 69. Subject matter
wherein the generator excitation circuit is intermittently
completed and opened.
(1) Note. The effective average excitation current is
determined by the frequency of the interruption and the ratio
of the time the circuit is completed to the time the circuit
is broken.
SEE OR SEARCH THIS CLASS, SUBCLASS:
84 for generator control systems under subclass 59 where a
resistor in series with a field winding is periodically short
circuited.
SEE OR SEARCH CLASS:
200, Electricity: Circuit Makers and Breakers, subclass
19.01 for miscellaneous periodic switches.
307, Electrical Transmission or Interconnection Systems,
subclasses 96+ for electrical systems which are regulated
by an intermittent regulatory interruption of the system.
318, Electricity: Motive Power Systems, subclass 537 for
motor control by intermittently or repetitiously operated
field circuit making and/or breaking means.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, subclasses 87+ for electromagnetically
operated periodic switches.
Subclass:
71
This subclass is indented under subclass 59. Subject matter
wherein the generator excitation is controlled by varying the
length of the field windings.
(1) Note. The variation in length of the field winding is
usually attained by providing the field winding with taps.
SEE OR SEARCH THIS CLASS, SUBCLASS:
49 for generator control systems under subclass 44 where the
control of the generator is effected by controlling the
structure of the magnetic circuit of the generator.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 189
for dynamoelectric machine structure having the field or
excitation windings adjustable as to effective length, as by
taps.
318, Electricity: Motive Power Systems, subclass 235 for
induction motor secondary circuit control having variable
number of effective conductors or turns, and subclass 531,
for motor control by variable length field winding.
Subclass:
72
This subclass is indented under subclass 59. Subject matter
wherein the generator excitation circuit is controlled by
means of one or more electric space discharge devices.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems,
appropriate subclasses for systems for controlling the
operation of electric lamps and gas or vapor discharge
devices.
318, Electricity: Motive Power Systems, and 532, for motor
control by space discharge device in field circuit.
323, Electricity: Power Supply or Regulation Systems,
subclass 227 and 291, for space discharge device regulating
systems.
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, subclasses 518+ for miscellaneous
control circuits utilizing an electronic space discharge
device.
388, Electricity: Motor Control Systems, art collections
913+ for motor control systems including space discharge
devices.
Subclass:
73
This subclass is indented under subclass 72. Subject matter
wherein the space discharge device is provided with a
discharge control device in addition to the load current
carrying electrodes.
(1) Note. The control device controls the conductivity of
the space discharge device. It may take such forms as an
electrostatic grid, an electromagnetic winding for a magnetic
field in which the discharge is controlled or an igniting
device for initiating the flow of current in a vapor or gas
discharge device.
SEE OR SEARCH CLASS:
315, Electric Lamp and Discharge Devices: Systems, subclasses
349+ and the subclasses specified in the notes to the
definition of those subclasses for systems for controlling
the operation of gas or vapor discharge devices (including
lamps) of the discharge control type.
318, Electricity: Motive Power Systems, subclasses 677+,
particularly subclass 682, for position servomechanisms
including space discharge type controls subclasses 700+ for
induction motor control having primary or armature circuit
control by space discharge devices, subclasses 727+ for
induction motor control having secondary circuit by space
discharge devices, subclasses 505+, for motor control by
space discharge devices in armature circuit, and subclass 532
for motor control by space discharge devices having control
elements in field circuit.
323, Electricity: Power Supply or Regulation Systems,
subclass 227 and 291, for space discharge regulating systems
wherein the space discharge device is provided with a
discharge control element.
327, Miscellaneous Active Electrical Nonlinear Devices,
Circuits, and Systems, subclasses 518+ for miscellaneous
control circuits utilizing an electronic space discharge
device.
388, Electricity: Motor Control Systems, art collections
913+ for motor control systems including space discharge
devices.
Subclass:
74
This subclass is indented under subclass 72. Subject matter
wherein the space discharge device or devices are electric
arcs.
(1) Note. The systems in this subclass are limited to those
in which the discharge is between electrodes exposed to the
atmosphere. Other systems under subclass 72 where the
discharge has negative resistance characteristics (arc) are
in subclass 72 or indented subclass 73 where the discharge
device has a control device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72 see note 1 above.
73 see note 1 above.
SEE OR SEARCH CLASS:
314, Electric Lamp and Discharge Devices: Consumable
Electrodes, appropriate subclasses for systems, including arc
discharge devices of the consumable electrode type which are
provided with means for controlling current flowing in the
arc.
315, Electric Lamp and Discharge Devices: Systems, subclasses
326+ and the subclasses specified in the notes to these
subclasses, for miscellaneous systems for controlling the
operation of electric arcs.
323, Electricity: Power Supply or Regulation Systems,
subclass 227 and 291, for space discharge device regulating
systems of the electric arc type.
Subclass:
75
This subclass is indented under subclass 59. Subject matter
wherein the excitation of the generator is controlled by
means of impedance in the excitation circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72 for generator field control by means of space discharge
devices. Under some conditions, a space discharge device may
be used as an impedance and subclasses 72+ should be searched
for such systems.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 249+, for
series motor control by means of motor circuit impedance, and
subclasses 534+ and 533+, for motor control by field circuit
impedance, subclasses 700+ for synchronous motor control,
particularly subclasses 710+ for field circuit control by
means of impedance; subclass 784 for impedance control of the
induction motor primary circuit during starting; subclass 792
for single phase start winding removal control circuit which
includes a variable temperature coefficient impedance in
circuit; subclasses 794+ for split phase capacitor motor
circuits; subclass 796 for split phase capacitor motor
circuits including a saturable winding in the circuits;
subclass 797 for split phase motor circuits using saturable
winding in the circuits; subclass 804 for induction motor
primary circuits responsive to speed or rotation phase angle
with controlled magnetic reactance in circuits; subclasses
814+ for voltage control of induction motor primary circuit
by impedance; subclasses 816+ for split phase induction
motors with voltage control of primary circuit by impedance;
subclasses 821+ for induction motor control with impedance in
secondary circuit.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
323, Electricity: Power Supply or Regulation Systems,
subclass 364, for impedance systems in general.
338, Electrical Resistors, subclasses 68+ for mechanically
variable electrical resistors such as rheostats.
361, Electricity: Electrical Systems and Devices, subclasses
277+ for variable condensers.
388, Electricity: Motor Control Systems, subclasses 800+
and 825+ for motor speed control systems and 842+ and 848+
for motor acceleration control systems including selectable
or variable impedance devices.
Subclass:
76
This subclass is indented under subclass 75. Subject matter
wherein the generator excitation circuit impedance control
involves plural impedances.
(1) Note. This subclass takes arrangements wherein there
are a plurality of different impedances in the field circuit.
A sectionalized impedance is not considered to be a
plurality of impedances (e.g., a plurality of resistance
sections connected in series with means for controlling the
number of sections in the field circuit would be searched in
subclass 80).
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 80+ see note 1 above.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 534, for
motor control by plural field circuit impedances.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
323, Electricity: Power Supply or Regulation Systems,
subclass 364, for impedance systems involving plural
impedances.
Subclass:
77
This subclass is indented under subclass 76. Subject matter
wherein the plural impedances form a bridge.
(1) Note. A bridge is a four terminal closed circuit
impedance network having alternate terminals connected to
input and output terminals respectively.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 663+, for
position servomechanisms which may include a bridge in the
error detector circuit and subclass 535 for motor control by
means of bridge network impedance control.
323, Electricity: Power Supply or Regulation Systems,
subclass 365, for bridge networks.
324, Electricity: Measuring and Testing, subclasses 600+
for impedance measuring bridge networks, and subclasses 98+
and 101 for bridge networks utilized in electric meters.
333, Wave Transmission Lines and Networks, subclass 169 for
wave filters of the Wheatstone bridge or lattice type.
Subclass:
78
This subclass is indented under subclass 76. Subject matter
wherein the plural impedances in the excitation circuit make
up a tuned or resonant circuit. Such circuit must include
both capacitance and inductance.
SEE OR SEARCH CLASS:
333, Wave Transmission Lines and Networks, subclasses 175+
for wave filters of the resonant, discrete frequency
selective type, and subclasses 219+ for resonators of the
distributed parameter type.
334, Tuners, appropriate subclass for tuned networks for use
in wave 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.
Subclass:
79
This subclass is indented under subclass 75. Subject matter
wherein a rectifier or unidirectionally conductive element is
used as an excitation circuit impedance.
(1) Note. This subclass is not concerned with the use of a
rectifier in the excitation circuit to convert alternating to
direct current. Such an arrangement is found throughout
subclasses 59 to 88 depending on the significant control
arrangement of the excitation circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 59+ see note 1 above.
subclasses 78+ for generator excitation control systems
under subclass 59 having a plurality of impedances.
SEE OR SEARCH CLASS:
257, Active Solid-State Devices (e.g., Transistors,
Solid-State Diodes), appropriate subclasses for active
solid-state devices which may be used as rectifying
elements.
323, Electricity: Power Supply or Regulation Systems,
subclass 364, for circuits using rectifiers as impedance
elements.
Subclass:
80
This subclass is indented under subclass 75. Subject matter
wherein the generator excitation circuit is controlled by
means of one or more resistors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 76+ for generator excitation control systems
under subclass 59 having a plurality of impedances.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 700+,
particularly subclasses 716+, for synchronous motor field
control by resistance; subclass 784 for resistance control of
the induction motor primary circuit during starting; subclass
814 for resistance control of the primary circuit voltage
during running; subclasses 821+ for resistance control of the
induction motor secondary during running; subclasses 238+,
for induction motor secondary circuit control by resistance,
and subclasses 533+ for motor field resistance control.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
323, Electricity: Power Supply or Regulation Systems,
subclass 364, for miscellaneous resistance systems.
338, Electrical Resistors, appropriate subclasses, for
electrical resistors and rheostats.
388, Electricity: Motor Control Systems, subclasses 800+
and 825+ for motor speed control systems and 842+ and 848+
for motor acceleration control systems including selectable
or variable impedance devices.
Subclass:
81
This subclass is indented under subclass 80. Subject matter
wherein the excitation circuit resistor is a temperature
variable resistor.
(1) Note. Thermally varied resistances may either be (1)
resistors whose resistance varies inherently with variation
in temperature (e.g., the resistance of copper increases with
increase in temperature while the resistance of carbon
decreases with increase in temperature) or (2) resistors
which are varied by means of a temperature responsive
operator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 33+ for automatic control of the generator in
response to thermal conditions.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 471+, for
thermally responsive motor control systems and subclass 533
for motor control having thermally varied field resistance.
320, Electricity: Battery or Capacitor Charging or
Discharging, subclasses 150+ for a charging or discharging
circuit for a battery or capacitor that includes thermal
condition detection.
323, Electricity: Power Supply or Regulation Systems,
subclass 369, for thermally varied resistance systems.
338, Electrical Resistors, subclasses 25+ for variable
electrical resistors responsive to a change in ambient
temperature.
Subclass:
82
This subclass is indented under subclass 80. Subject matter
wherein the excitation circuit resistor is a pressure
variable resistor.
(1) Note. Although the usual pressure varied resistor takes
the form of a carbon pile, this subclass is not restricted
thereto.
SEE OR SEARCH THIS CLASS, SUBCLASS:
17 for generator systems within the class definition wherein
the generator is automatically controlled in response to a
condition (as a pressure condition), see indented subclass 35
for such automatic control systems where the generator is
controlled in response to fluid pressure.
35 for fluid pressure responsive generator control.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 481 for
electric motor control in response to pressure in a fluid or
granular material and subclass 533 for motor field circuit
control including pressure varied resistor.
320, Electricity: Battery and Condenser Charging and
Discharging, subclass 70, for generation systems for battery
charging with pressure varied impedance field circuit
control.
323, Electricity: Power Supply or Regulation Systems,
subclass 295, for resistance systems including pressure
varied resistors.
338, Electrical Resistors, subclasses 36+ for fluid or gas
pressure actuated electrical resistors, and subclasses 99+
for electrical resistors of the compressible type.
Subclass:
83
This subclass is indented under subclass 80. Subject matter
wherein the generator excitation circuit is controlled by
short circuiting the resistor or a portion thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
68 for generator control systems under subclass 59 where the
excitation of the generator is controlled by short circuiting
a field winding.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 533, for
electric motor field circuit control by short circuiting a
resistor.
323, Electricity: Power Supply or Regulation Systems,
subclass 297 and 298, for resistance systems including short
circuited resistors.
Subclass:
84
This subclass is indented under subclass 83. Subject matter
wherein the short circuit of the control resistor is
intermittently completed and opened.
(1) Note. In the systems in this subclass the effective
value of the resistor is determined by the periodicity of the
circuit making and breaking and the ratio of the time the
shunting circuit is open to the time it is closed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70 for generator control by continuous making and breaking
of the excitation. In subclass 70 the excitation circuit is
periodically opened and closed.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 533 for
motor control by means of intermittently short circuiting and
opening a short circuit about a resistance in the excitation
circuit.
Subclass:
85
This subclass is indented under subclass 83. Subject matter
wherein the excitation circuit resistor is short circuited
step by step.
(1) Note. In some of the systems in this subclass, the
resistor is divided into a plurality of sections and
switching means are provided so that each of the portions may
be short circuited in regular order so that at one extreme of
the switching operation all sections are short circuited and
at the other extreme, none of the sections are short
circuited. To be classified in this subclass, the resistor
need not be arranged so that the sections are short circuited
in regular order. The system may be arranged so that the
resistor sections may be short circuited in any order
desired.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclass 533 for
motor control short circuiting step by step of field
resistor.
323, Electricity: Power Supply or Regulation Systems,
subclass 297, for resistance systems wherein a resistor is
short circuited step by step.
Subclass:
86
This subclass is indented under subclass 59. Subject matter
wherein the generator excitation circuit is energized from
two or more sources of electric energy and the excitation
current depends on the resultant of the two or more voltages
impressed thereby.
(1) Note. Usually one of the sources of electric energy is
the generator output to which is added or from which is
subtracted the auxiliary electromotive force. Usually both
sources of electric energy are used in the normal operation
of the generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for generator systems under subclass 59 having a
substitute or auxiliary source of electric energy to energize
the excitation circuit during the starting period, the supply
from the substitute or auxiliary source being discontinued
after the generator has "built up" to a predetermined
voltage.
SEE OR SEARCH CLASS:
307, Electrical Transmissions or Interconnection Systems,
subclasses 43+ for electrical systems in which a single
load is supplied by a plurality of sources or supply circuits
for electrical energy.
318, Electricity: Motive Power Systems, and subclass 530
for motor control by field circuit having plural sources of
field circuit voltage.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
Subclass:
87
This subclass is indented under subclass 86. Subject matter
wherein one of the sources of electric energy is a
dynamoelectric machine other than the load generator.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclass 76 for interconnection systems for plural
generators of different voltages, subclasses 78+ for systems
of series connected generators, and subclass 84 for systems
including plural generators.
Subclass:
88
This subclass is indented under subclass 86. Subject matter
wherein one of the sources of electric energy is a battery.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclasses 48+ for systems having plural sources of current
in which one source is a battery floating across the line,
and subclasses 66+ for systems having plural alternative
sources of current in which one source is a battery.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclass for charging or discharging
plural batteries.
Subclass:
89
This subclass is indented under subclass 44. Subject matter
wherein the generator is controlled by controlling the
armature circuit, or the primary circuit of the generator.
(1) Note. Since the armature circuit or primary circuit of
the generator may be extended to a system of distribution, to
a load circuit or to a load device, see the class definition,
especially section I,D, for the general line between Class
322 and other classes which have generator supplied load
circuits, or systems of distribution or load devices. This
and the indented subclasses include the generator supplied
systems in Class 322 which are not classified in the subclass
above and which have means in the armature circuit for
controlling the generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for generator control systems within the class definition
having means to control the polarity of the generator.
7 for generator control systems within the class definition
where both the generator and the load circuit are controlled.
See note 1 to the definition of subclass 89.
14 for generator control systems within the class definition
where both the generator and the generating driving means are
controlled.
subclasses 17+ for this subject matter where the armature
circuit is automatically controlled in response to a
condition.
45 for generator control under subclass 44 where the
generator control is effectuated by a plurality of diverse
controls one of which may be controlling the armature or
primary circuit.
47 for this subject matter where the generator is an
induction type generator.
48 for this subject matter where the generator is an acyclic
or homopolar generator.
49 for generator control under subclass 44 where the
generator is controlled by controlling the structure of parts
which form at least a part of the magnetic circuit of the
generator, see indented subclass 51 where the magnetic
structure so controlled is the rotating member of the
generator (i.e., either the armature or field), and indented
subclass 52 where the magnetic structure so controlled is the
stator element of the generator (i.e., either the armature or
the field).
53 for generator control under subclass 44 where the
generator is provided with an odd number of brushes (i.e.,
has an auxiliary brush), and the generator control means
includes an armature winding or a portion thereof connected
to a short circuit between the odd or auxiliary brush and one
of the load brushes.
subclasses 54+ for generator control systems under subclass
44 where the generator control includes means to adjust the
current collecting mechanism (i.e., brushes).
57 for generator control systems under subclass 44 where the
control includes means for saturating at least a portion of
the generator magnetic structure by means of a winding which
is in noninductive relationship to the armature and field
windings.
58 for generator control systems under subclass 44 where the
system includes means (such as a filter) for eliminating,
suppressing, or minimizing undesired frequencies.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclasses 112+ for switching systems.
318, Electricity: Motive Power Systems, subclass 706 for
synchronous motor synchronizing systems with armature winding
removal upon failure to synchronize or loss of synchronism;
subclass 709 for synchronous motor synchronizing systems
having different armature winding voltage prior to
synchronism; subclasses 720+ for armature circuits for
synchronous motor systems; subclasses 767+ for primary
circuit control of induction motors; subclasses 287+, for
motor reversing by armature circuit control, and subclass
494, for motor control by armature circuit control.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
388, Electricity: Motor Control Systems, subclasses 800+
and 825+ for motor speed control systems and 842+ and 848+
for motor acceleration control systems.
Subclass:
90
This subclass is indented under subclass 89. Subject matter
wherein the armature circuit control comprises plural
armature circuits or windings.
(1) Note. A plurality of windings connected in series or
parallel so that they constitute only one electrical armature
winding is not classified as plural armature windings. To be
classified in this subclass, the generator must have a
plurality of armature windings connected to form different
armature circuits. The plurality of armature windings may be
designed so that they might be connected in series or
parallel to supply a single load circuit or one of the
windings may be for control purposes only.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclasses 11+ for plural load circuit systems, and
subclasses 43+ for plural supply circuit systems.
310, Electrical Generator or Motor Structure, subclasses 140+
for plural commutator generators having plural armature
windings, subclasses 144+ for plural slip ring generators
having plural armature windings, and subclasses 198+ for
plural armature winding structure.
318, Electricity: Motive Power Systems, subclass 724 for
synchronous motor armature circuits having a plurality of
windings or winding portions; subclass 737 for self-cascaded
induction motor systems having a plurality of primary
windings; subclasses 768+ for three phase winding induction
motor systems operated from a single phase source; subclass
770 for induction motor primary circuits of the dual voltage
type; subclass 771 for delta-wye, plural wye, or delta-delta
connected induction motor primary circuits; subclass 775 for
plural speed single induction motors having a separate
primary winding for each speed; subclass 777 for plural speed
induction motors having a separate primary winding for each
speed; subclasses 288+, for motor reversing by plural
armature windings.
Subclass:
91
This subclass is indented under subclass 89. Subject matter
wherein the generator is controlled by short circuiting the
armature winding or a portion thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
47 for generator control systems under subclass 44 where the
generator is an induction generator.
53 for the subject matter where the generator is provided
with an odd number of brushes (i.e., has an auxiliary brush)
and the generator control means includes an armature winding
or a portion thereof connected to a short circuit between the
odd or auxiliary brush and one of the load brushes.
subclasses 95+ for generator control by shunting the
armature winding through an impedance. Subclass 91 differs
from subclass 95 in that in subclass 95 the armature is
shunted through a resistance and in this subclass (91) the
shunt connection has negligible impedance. See subclass 98
where the shunt circuit contains a resistance.
SEE OR SEARCH CLASS:
307, Electrical Transmission or Interconnection Systems,
subclass 100 for systems including means for shunting or
short circuiting the same.
310, Electrical Generator or Motor Structure, subclass 177
for dynamoelectric machines having a short circuited winding
or conductor.
318, Electricity: Motive Power Systems, subclasses 379+, for
motor braking systems having armature short circuiting and
subclass 501 for motor armature circuit control by shunting
armature in whole or in part.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
Subclass:
92
This subclass is indented under subclass 91. Subject matter
wherein the generator is provided with a set of auxiliary
brushes spaced 180 electrical degrees apart in addition to
the usual load circuit brushes and the short circuit
connection is between the auxiliary brushes.
(1) Note. The usual purpose of the above arrangement is to
increase armature reaction flux which produces a field in
quadrature to the flux produced by the field windings. These
devices are called "cross-field generators" in the art.
These devices find application for such uses as constant
current welding generators and as dynamoelectric amplifier
devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
53 if the generator is provided with an odd or auxiliary
brush, and the armature winding or a portion thereof is
connected to a short circuit between the odd or auxiliary
brush and one of the main brushes.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 151
for dynamoelectric machines having a pair of additional short
circuited brushes.
330, Amplifiers, subclass 58 for amplifiers whose active
element is a rotating dynamoelectric machine.
Subclass:
93
This subclass is indented under subclass 89. Subject matter
wherein the generator armature circuit control includes a
tapped or sectionalized armature.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 91+ for generator armature control under
subclass 89 where the generator is controlled by short
circuiting a portion of the armature winding.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, subclass 200
for structure of dynamoelectric machines having tapped or
sectionalized armatures.
318, Electricity: Motive Power Systems, subclass 502, for
motor armature control having variable length or tapped
armature winding.
Subclass:
94
This subclass is indented under subclass 89. Subject matter
wherein the generator armature circuit control includes
armature circuit making and/or breaking.
(1) Note. The above arrangement is peculiarly applicable
for use in battery charging systems wherein a reverse current
cutout is interposed between the generator and battery.
Particular attention is directed to Class 320 in the search
notes below.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, and subclasses 519+,
for motor control by means of armature circuit making and/or
breaking devices.
320, Electricity: Battery or Capacitor Charging or
Discharging, appropriate subclasses, particularly subclass
123, for a battery or capacitor charging or discharging
system including a generator.
Subclass:
95
This subclass is indented under subclass 89. Subject matter
wherein the generator armature control is by means of
impedance in circuit with the armature.
(1) Note. See the class definition, especially sections I,
D, for a statement as to other classes which provide for a
generator supplied load circuit where the load circuit is
controlled by an impedance.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 91+ for generator systems having armature or
primary circuit control where the system includes means to
short circuit the armature winding of the generator.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 700+,
particularly subclass 720, for synchronous motor systems
impedance control of the armature circuit during starting or
running; subclass 784 for impedance control of the primary
circuit of induction motors during starting; subclass 792 for
primary circuit control of the start winding of single phase
motors during starting by a variable temperature coefficient
impedance element; subclasses 794+ for impedance control of
split phase capacitor motors; subclass 796 for saturable
winding impedance control of the primary circuit of split
phase capacitor run motors; subclass 797 for phase splitting
of the primary circuit of split phase motors by a saturable
winding; subclass 804 for induction motor primary circuit
control with a controlled magnetic reactance; subclasses 814+
for inductor motor primary circuit control by means of
impedance, and subclasses 508+ for motor control by means of
impedances in armature circuit.
388, Electricity: Motor Control Systems, subclasses 800+
and 825+ for motor speed control systems and 842+ and 848+
for motor acceleration control systems including selectable
or variable impedance devices.
Subclass:
96
This subclass is indented under subclass 95. Subject matter
wherein the generator armature control is by means of a
plurality of impedances in circuit with the armature.
(1) Note. The plurality of impedances must be different
impedance elements. A tapped or sectionalized impedance
element is not a plurality of impedances.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, and subclasses 509+,
for motor control by means of plural impedances in armature
circuit.
323, Electricity: Power Supply or Regulation Systems,
subclass 364, for impedance systems including a plurality of
impedances.
388, Electricity: Motor Control Systems, subclasses 800+
and 825+ for motor speed control systems and 842+ and 848+
for motor acceleration control systems including selectable
or variable impedance devices.
Subclass:
97
This subclass is indented under subclass 95. Subject matter
wherein the armature circuit impedance is a resistance.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, and subclasses 514+,
for motor control by armature circuit resistor.
323, Electricity: Power Supply or Regulation Systems,
subclass 369, for resistance systems.
388, Electricity: Motor Control Systems, subclasses 800+
and 825+ for motor speed control systems and 842+ and 848+
for motor acceleration control systems including selectable
or variable impedance devices.
Subclass:
98
This subclass is indented under subclass 97. Subject matter
wherein the resistance is connected across the generator
brushes or in shunt to the generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 91+ for generator control by short circuiting of
armature winding. In subclass 91, the shunt circuit is of
negligible impedance.
Subclass:
99
This subclass is indented under the class definition. Subject
matter wherein the system is provided with signals,
indicators, recorders, or testing means.
(1) Note. For a statement of the systems in this class
which include a signal, indicator recorder, or testing, and
the general line between Class 322 and the other classes
providing for similar subject matter, see the Class 322 Class
Definition, Lines With Other Classes, "Load in Output Circuit
Recited by Name Only or Significantly,-- Generator and
Testing Means for Generator, etc."
SEE OR SEARCH CLASS:
116, Signals and Indicators, appropriate subclasses for
nonelectric signals and indicators.
324, Electricity: Measuring and Testing, appropriate
subclasses for electric testing.
340, Communications: Electrical, subclasses 500+ for
electric signaling systems automatically responsive to a
condition.
346, Recorders, appropriate subclasses for recording
arrangements.
Subclass:
100
This subclass is indented under the class definition. Subject
matter not classified in any of the foregoing subclasses.
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