US PATENT SUBCLASS 318 / 487
.~.~ Electromagnetic or inductive time-delay means

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

445  DF  AUTOMATIC AND/OR WITH TIME-DELAY MEANS (E.G., AUTOMATIC STARTING AND/OR STOPPING) {20}
484  DF  .~ Time or with time-delay means {3}
487.~.~ Electromagnetic or inductive time-delay means

DEFINITION

Classification: 318/487

(under subclass 484) Subject matter in which the time-controlling or time-delay means comprises an electromagnetic device in the control circuit of the motor, the electromagnetic device having means for affecting the rate of rise and fall of the current through the electromagnet or for affecting the rate of increase or decrease in the magnetic flux associated with the electromagnet, for the purpose of controlling the time of operation of the control means.