US PATENT SUBCLASS 388 / 928
.~.~ Which controls position of commutator brushes

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388 /   HD   ELECTRICITY: MOTOR CONTROL SYSTEMS

923  DF  SPECIFIC FEEDBACK CONDITION OR DEVICE {6}
924  DF  .~ Centrifugal device (e.g., governor) {4}
928.~.~ Which controls position of commutator brushes

DEFINITION

Classification: 388/928

Which controls position of commutator brushes:

Subject matter under art collection 924 wherein the rotary mechanical device controls the relative position of motor commutator brushes.