US PATENT SUBCLASS 388 / 849
.~ Field control, or field and armature control

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}
849.~ Field control, or field and armature control {3}
850  DF  .~.~> By transformer or inductive device
851  DF  .~.~> By patterned switch
852  DF  .~.~> By insertion of resistance

DEFINITION

Classification: 388/849

Field control, or field and armature control:

(under subclass 848) Subject matter in which regulation of the acceleration of the motor is effected by circuitry which controls the energization of, (1) a field winding of the motor, or (2) both a field winding and an armature winding.

SEE OR SEARCH THIS CLASS, SUBCLASS:

853+, for open loop acceleration control systems which

control an armature winding only.