US PATENT SUBCLASS 388 / 834
.~.~ By selection of windings

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

825  DF  OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {3}
830  DF  .~ Analog armature control {7}
834.~.~ By selection of windings

DEFINITION

Classification: 388/834

By selection of windings:

(under subclass 830) Subject matter wherein running speed is controlled by selecting the windings of the armature which receive energization.