US PATENT SUBCLASS 388 / 808
.~.~ By selection of windings

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

800  DF  CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {4}
803  DF  .~ Field control, or field and armature control, by analog (only) circuitry {4}
808.~.~ By selection of windings

DEFINITION

Classification: 388/808

By selection of windings:

(under subclass 803) Subject matter wherein running speed is controlled by selecting the windings of the motor field, or armature, or both, which receive energization.