US PATENT SUBCLASS 388 / 856
.~.~.~ By insertion of resistance or shorting of circuit

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.~.~.~ By insertion of resistance or shorting of circuit {2}
857  DF  .~.~.~.~> With relay {1}
859  DF  .~.~.~.~> With patterned switch

DEFINITION

Classification: 388/856

By insertion of resistance or shorting of circuit:

(under subclass 855) Subject matter wherein the impedance device is a variable resistor, or a set of fixed resistors of different values - including zero resistance (short circuit).