US PATENT SUBCLASS 318 / 41
.~ Having electrical synchronizing interconnections

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

34  DF  PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS {22}
41.~ Having electrical synchronizing interconnections {3}
42  DF  .~.~> Between windings on auxiliary dynamo-electric machines
43  DF  .~.~> D.C. or A.C. commutator motors with slip rings
44  DF  .~.~> Between induction motor secondaries

DEFINITION

Classification: 318/41

(under subclass 34) Subject matter in which means are provided for electrically interconnecting the winding of an electric motor to the winding of another electric motor, or for electrically interconnecting a winding on an auxiliary dynamo-electric machine connected to the rotor of an electric motor to the winding of an auxiliary dynamo-electric machine connected to the rotor of another electric motor; said interconnections being so arranged that when the two electric motors operate at predetermined relative speeds and/or phase relationships substantially no current flows in said interconnections, but that when said relative speeds or phase relationship depart from said relationships current flow occurs in the interconnection in a direction which tends to restore the said speed and/or phase relationships between the motors.

SEE OR SEARCH THIS CLASS, SUBCLASS:

24, and 30, for follow-up electric motor systems of the synchronous type in which the transmitter (a dynamo-electric machine) is electrically interconnected with the receiver (an

electric motor) and in which movement of one machine tends to cause intercirculating currents to flow resulting in a tendency toward synchronous movement therewith of the other dynamo-electric machine.

45, for mechanically interconnected electric motors.

68, for miscellaneous plural motor systems having means for controlling the relative speeds of the motor.

SEE OR SEARCH CLASS 60, Power Plants,

702, for synchronizing arrangements for nonelectric motors.

348, Television,

500+, for television systems having synchronizing systems for synchronizing motors at the transmitting and receiving stations with respect to each other.

358, Facsimile,

409+, for facsimile systems having synchronizing systems for synchronizing motors at the transmitting and receiving stations with respect to each other.

370, Multiplex Communications,

303+, for a multiplexing system having a rotary distributing switch at the transmitting and receiving stations.

375, Pulse or Digital Communications,

354+, for synchronizing systems for digital communications in general.

416, Fluid Reaction Surfaces (i.e., Impellers),

34, for plural impellers having synchronizing means.