US PATENT SUBCLASS 318 / 296
.~ Field circuit control

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

280  DF  MOTOR-REVERSING {4}
296.~ Field circuit control {2}
297  DF  .~.~> Plural, diverse or diversely controlled field windings {1}
300  DF  .~.~> Field-circuit current reversed

DEFINITION

Classification: 318/296

(under subclass 280) Subject matter in which means are provided for effecting reversal of the motor by means in the field circuit of the motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

521, and the subclasses specified in the Notes thereto, for other motor control systems having motor field circuit control.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

104, for systems containing electromagnets or other highly inductive devices. 310, Electrical Generator or Motor Structure,

180, for structure of the field windings.