US PATENT SUBCLASS 318 / 267
.~.~.~.~.~ Dual control circuits alternately energized

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

255  DF  PLURAL DIVERSE MOTOR CONTROLS {4}
256  DF  .~ Motor-reversing {4}
264  DF  .~.~ With automatic starting and/or stopping {1}
265  DF  .~.~.~ Stopping upon predetermined movement of or position of motor or driven device {1}
266  DF  .~.~.~.~ At limit-of-travel of motor or driven device {1}
267.~.~.~.~.~ Dual control circuits alternately energized

DEFINITION

Classification: 318/267

(under subclass 266) Subject matter in which the control means for reversing and starting and/or stopping comprise two circuits the energization of one of which controls the starting in one direction and the energization of the other of which effects starting in the opposite direction and in which the arrangements are such that, with one of the circuits energized for operation in one direction, when the motor is automatically stopped at its limit of travel, it cannot be started until the other circuit is energized.

(1) Note. In the systems in this subclass, each time the motor is stopped at the limit of travel it can only be restarted in the reverse direction by another circuit, i.e., it cannot be restarted in the same direction of operation.