U.S. PATENT AND TRADEMARK OFFICE
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U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
Patents classified in a subclass may be accessed by either clicking on
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(definitions have been obtained from the
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is produced by the U.S. Patent and Trademark Office
Electronic Products Branch)
Class 290
PRIME-MOVER DYNAMO PLANTS
Class Definition:
This class includes patents for the production and
transmission of electric power and does not include any
specific use to which the power is put. (Note. The mere
reference to or the inclusion in a claim of an
energy-consuming device, broadly stated--as, for example, a
"lamp", "heater", or "tool"--is not sufficient to exclude the
patent from this class). It includes the following groups
when the invention includes some motor other than a dynamo
electric machine in combination with a dynamo electric
machine:
Wherein a proximate function of the entire combination is the
generation of electricity by a dynamo-electric machine or
such generation combined with the transmission, storage, or
control of the current generated. There may be an additional
function of production, transmission, storage, or control of
some power other than electrical.
Wherein a proximate function of the entire combination is
that of an electric motor. There may be an additional
function of production, transmission, storage, or control of
some power other than electrical.
Wherein the direction in which the energy flows (whether from
the dynamo electric machine to the motor or from the motor to
the dynamo-electric machine) is not essential to the
invention. These are mostly structural combinations.
Includes the combination of an internal-combustion engine and
magneto unless the ignition system is claimed. A magneto in
combination with a timing means is regarded as a
subcombination of an internal-combustion engine.
Wherein the operation involves an interchange of energy
between the motor and the dynamo-electric machine and the
dynamo electric machine is not subsidiary to the motor, but
may as well be a source of external energy as the motor. A
magneto connected with an ignition system of an
internal-combustion engine is considered subsidiary to the
internal-combustion engine.
Dynamo electric-machine starters for engines, the dynamo
electric machine being mechanically connected to the engine
to drive the same. Claims including an engine and starter,
if the latter is shown as a dynamo electric machine starter,
are included. Dynamo electric machines disclosed as starters
for engines are included, even through the engine is not
claimed, provided the elements claimed require for their
operation a reversal of energy flow to and from the engine.
Power production and transmission systems wherein the dynamo
electric machine above referred to charges a storage
battery.
(1) Note. Pumps operated by motors, which motors are
controlled by fluid-pressure or other fluid condition
produced by the pump, are excluded.
(2) Note. All patents in this class disclosing dynamo
electric machines having a "rotary field and armature",
special internal-combustion-engine "ignition", prime-mover
"starting-motors", or "engine-control" features may be found
by searching the subclasses having these terms in their
titles.
(3) Note. All patents disclosing batteries may be found by
searching subclasses 16, 41 and 50, and the "starting-motor"
subclasses.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
A compilation of all types of motors will be found in the
Notes to the class definition of Class 60.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, and 192, Clutches and
Power-Stop Control, for the combinations of this class where
the starter is merely a cranking means for the engine and the
invention resides in the gearing or clutch connecting the
starter to the engine, respectively.
123, Internal-Combustion Engines, for the combinations of
this class where the starter is merely a cranking means
adjunctive to means modifying the operation of an
internal-combustion engine, and no other structure of the
starter of its relation to the engine is claimed than would
be set forth by the mere inclusion of the electric motor as
an element of the combination.
SUBCLASSES
Subclass:
1
This subclass is indented under the class definition.
Inventions not otherwise classified.
Subclass:
2
Prime-mover dynamo plants having as a function the production
of heat.
SEE OR SEARCH CLASS:
237, Heating Systems, subclass 12.3 for heat and power
plants.
Subclass:
3
Prime-mover dynamo plants peculiarly adapted to use on trains
of vehicles. The particular construction of the vehicle is
not included.
Subclass:
4
Prime-mover dynamo plants involving two or more motors other
than dynamo-electric machines.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3
Subclass:
5
Prime-mover dynamo plants including an alternating-current
dynamo electric machine having a field and armature, both of
which are rotatable.
Subclass:
6
Prime-mover dynamo plants having a dynamo-electric machine
which comprises two or more armatures threaded by a single
magnetic flux.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 for plants of this character comprising dynamo electric
machines having fields and armatures both of which rotate.
Subclass:
7
Prime-mover dynamo plants including control of, by or through
an electric circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3 4 and 5.
Subclass:
8
Prime-mover dynamo plants comprising a dynamo in a
field-excitation circuit of which is another dynamo for
furnishing or controlling current in the field-excitation
circuit.
Subclass:
-2
Electric control, Traction.
Electric-control prime-mover dynamo plants wherein a function
of the combination is to move a load. The load may be moved
by the prime mover or by a dynamo-electric machine operating
as a motor. The load moved is generally that moved by the
traction-wheels of a motor-vehicle.
Subclass:
9
Electric-control traction prime-mover dynamo plants having as
a function thereof the movement of a load by a dynamo
electric machine operating as a motor. The load moved is
generally that moved by the traction-wheels of a
motor-vehicle.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 140+
for generator fed motor systems having generator control.
Subclass:
10
Electric-control prime-mover dynamo plants having a dynamo
electric machine which acts as a traction-motor and in
addition a dynamo electric machine which acts as a motor for
starting the prime mover and as a generator.
Subclass:
11
Electric-control prime-mover dynamo plants having in addition
to a dynamo electric machine which acts as a traction-motor
another dynamo-electric machine which acts as a motor for
starting the prime mover and as a generator and a third
dynamo electric machine which acts as a generator.
Subclass:
12
Electric-control traction-motor prime-mover dynamo plants
having in addition to the traction-motor a starting and
generating dynamo and wherein one or more of the dynamo
electric machines have both field and armature rotatable.
Subclass:
13
Electric-control prime-mover dynamo plants including an
electric traction-motor, a starting and generating dynamo,
and an internal-combustion engine which is provided with
special igniting means.
Subclass:
14
Electric-control prime-mover dynamo plants including an
electric traction-motor and a dynamo electric machine which
operated as a generator.
Subclass:
15
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a traction-motor and a dynamo
electric machine which acts as a generator, one or both of
said dynamo electric machines having both field and armature
rotatable.
Subclass:
16
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a traction-motor, a dynamo
electric machine which acts as a generator, and a battery.
Subclass:
17
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a traction-motor, a dynamo
electric machine which acts as a generator, and a prime mover
provided with controlling means therefor.
Subclass:
18
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a traction-motor and also as a
motor for starting the prime mover.
Subclass:
19
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a traction-motor, as a motor
for starting the prime mover, and as an electric generator.
Subclass:
20
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a traction-motor, as a motor
for starting the prime mover, and as an electric generator,
the field and armature of said machine being both rotatable.
Subclass:
21
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a traction-motor and as a
motor for starting the prime mover, the prime mover being
provided with means for controlling the same.
Subclass:
22
Electric-control traction prime-mover dynamo plants including
a dynamo electric machine which acts as a motor for starting
the prime mover and as a generator.
Subclass:
23
Electric-control traction prime-mover dynamo plants including
a dynamo electric machine which acts as a motor for starting
the prime mover and as an electric generator and having a
field and armature, both of which rotate.
Subclass:
24
Electric-control traction prime-mover dynamo plants including
a dynamo electric machine which acts as a motor for starting
the prime mover and as a generator and has a field and
armature, both of which rotate, and a prime mover provided
with means for controlling the same.
Subclass:
25
Electric-control traction prime-mover dynamo plants including
a dynamo electric machine which acts as a motor to start the
prime mover and as a generator and a prime mover which is
provided with means for controlling the same.
Subclass:
26
Electric-control traction prime-mover dynamo plants including
a dynamo electric machine which acts as a motor for starting
the prime mover and as a generator and an internal-combustion
engine which is provided with special igniting means.
Subclass:
27
Electric-control traction prime-mover dynamo plants including
a dynamo electric machine which acts as a motor for starting
the prime mover and in addition a dynamo electric machine
which acts as a generator.
Subclass:
28
Electric-control traction prime-mover dynamo plants including
a dynamo electric machine which acts as a motor for starting
the prime mover.
Subclass:
29
Electric-control traction prime-mover dynamo plants which
include a dynamo electric machine having a field and
armature, both of which rotate.
Subclass:
30
Prime-mover dynamo plants including a prime mover which
operates a generator to supply current to a translating
circuit and provided with means for automatically starting
the prime mover when the translating circuit is closed or in
response to predetermined electrical conditions.
Subclass:
31
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover and as a generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30
Subclass:
32
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover and as a generator and in addition a dynamo electric
machine which acts as a generator.
Subclass:
33
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover and as a generator, in addition a dynamo electric
machine which acts as a generator and an internal combustion
engine which is provided with special igniting means. The
last-mentioned generator in general furnishes current for the
ignition.
Subclass:
34
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover and as a generator, the prime mover having means for
controlling the same.
Subclass:
35
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover and as a generator, together with an
internal-combustion engine which is provided with special
igniting means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30
Subclass:
36
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover and in addition a dynamo electric machine which acts as
a generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30
Subclass:
37
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover, an additional dynamo electric machine which acts as a
generator, and an internal-combustion engine which is
provided with special igniting means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30
Subclass:
38
Electric-control prime-mover dynamo plants including a dynamo
electric machine which acts as a motor for starting the prime
mover.
Subclass:
39
Electric-control prime-mover dynamo plants including a dynamo
electric machine having a field and armature, both of which
rotate.
Subclass:
40
Electric-control prime-mover dynamo plants wherein the prime
mover is provided with means for controlling the same. These
are generally prime-mover-operated generators, the prime
mover being automatically controlled in response to
line-circuit conditions.
(1) Note. The combination of an internal combustion engine
idle speed control and an electric generator in which is
included (a) any detail of the generator, (b) any
relationship between a generator part and an internal
combustion engine, or (c) any control of the internal
combustion engine in response to the electricity produced by
the generator is found here.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, subclass 339.16 for an
internal combustion engine idle speed control responsive to
an external load condition.
361, Electricity: Electrical Systems and Devices, subclasses
236+ for miscellaneous electrical speed responsive
systems.
Subclass:
41
Electric-control prime-mover dynamo plants including an
internal-combustion engine which is provided with special
igniting means.
Subclass:
42
Electric-control prime-mover dynamo plants including tide or
wave motors.
Subclass:
43
Electric-control prime-mover dynamo plants including a
fluid-current motor.
Subclass:
44
Electric-control prime-mover dynamo plants including a
wind-motor.
Subclass:
45
Prime-mover dynamo plants wherein a function of the
combination is to move a load. The load may be moved by the
prime mover or by a dynamo electric machine operating as a
motor. The load moved is generally that moved by the
traction-wheels of a motor-vehicle.
Subclass:
46
Prime-mover dynamo plants including a dynamo electric machine
which acts as a motor for starting the prime mover and as a
generator.
Subclass:
47
Prime-mover dynamo plants including a dynamo-electric machine
which acts as a motor for starting the prime mover and in
addition a dynamo electric machine which acts as a
generator.
Subclass:
48
Prime-mover dynamo plants including a dynamo electric machine
which acts as a motor to start the prime mover.
Subclass:
49
Prime-mover dynamo plants including a dynamo electric machine
having a field and armature, both of which rotate.
Subclass:
50
Prime-mover dynamo plants including electric batteries.
(1) Note. For the remaining patents in this class which
disclose batteries, search subclasses 16 and 30 and the
subclasses whose titles disclose that they contain
starting-motors.
Subclass:
51
Prime-mover dynamo plants including a prime mover which has
means for controlling the same.
Subclass:
52
Prime-mover dynamo plants including a dynamo electric machine
which operates as a generator and a turbine adapted to drive
the same mechanically connected thereto.
Subclass:
53
Prime-mover dynamo plants including tide or wave motors.
SEE OR SEARCH CLASS:
60, Power Plants, subclasses 495+ for motors having a
buoyant working member motivated by the vertical rise and
fall of the surface of a body of fluid.
405, Hydraulic and Earth Engineering, subclasses 76+ for a
method or apparatus for extracting power from waves or tides
involving significant hydraulic works and only nominal
recitation of the motor or dynamoelectric machine.
Subclass:
54
Prime-mover dynamo plants including a fluid current motor.
SEE OR SEARCH CLASS:
405, Hydraulic and Earth Engineering, subclasses 75+ for a
method or apparatus for extracting power from a moving fluid
involving significant hydraulic work structure and only
nominal recitation of the fluid motor or dynamoelectric
machine.
Subclass:
55
Prime-mover dynamo plants including wind-motors.
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Last Modified: 6 October 2000