US PATENT SUBCLASS 318 / 289
.~.~.~ Phase-reversal


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

280  DF  MOTOR-REVERSING {4}
287  DF  .~ Armature or primary circuit control {2}
288  DF  .~.~ Plural, diverse or diversely controlled armature windings {2}
289.~.~.~ Phase-reversal


DEFINITION

Classification: 318/289

(under subclass 288) Subject matter in which the motor is an alternating current motor having two or more phase windings and in which means are provided for reversing the time phase sequence of the currents supplied to two or more of the phase windings.

SEE OR SEARCH THIS CLASS, SUBCLASS:

121, for reciprocating or oscillating motor systems with means for reversing the motor by phase reversal.

207, for induction motor systems with means for reversing the motor by phase reversal.

373+, for motor systems having means for braking the motors by "plugging" which may be effected by phase reversal.

496, and the subclasses specified in the Notes thereto, for miscellaneous motor systems where the motor has polyphase windings.