US PATENT SUBCLASS 388 / 859
.~.~.~.~ With patterned switch

Current as of: June, 1999
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388 /   HD   ELECTRICITY: MOTOR CONTROL SYSTEMS

848  DF  OPEN LOOP ACCELERATION CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {2}
853  DF  .~ Armature control {2}
855  DF  .~.~ By selectable or variable impedance {2}
856  DF  .~.~.~ By insertion of resistance or shorting of circuit {2}
859.~.~.~.~ With patterned switch

DEFINITION

Classification: 388/859

With patterned switch:

(under subclass 856) Subject matter wherein resistance are inserted by a mechanical device which functions according to a predetermined pattern.