US PATENT SUBCLASS 388 / 924
.~ Centrifugal device (e.g., governor)

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

923  DF  SPECIFIC FEEDBACK CONDITION OR DEVICE {6}
924.~ Centrifugal device (e.g., governor) {4}
925  DF  .~.~> Including contacts which open and close motor circuit
926  DF  .~.~> Which controls a vacuum tube or solid-state device in motor circuit
927  DF  .~.~> Which varies resistance of motor circuit
928  DF  .~.~> Which controls position of commutator brushes

DEFINITION

Classification: 388/924

Centrifugal device (e.g., governor):

Art collection of systems wherein feedback is provided by a rotary mechanical device which senses the speed of the motor by sensing the position of weights which are subject to centrifugal forces due to the rotation of the motor.