US PATENT SUBCLASS 318 / 555
.~.~ Electromagnetic actuated

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

543  DF  THREE-OR-MORE-POSITIONS MOTOR CONTROLLER SYSTEMS {6}
552  DF  .~ Power-actuated controllers {2}
555.~.~ Electromagnetic actuated {2}
556  DF  .~.~.~> Reciprocating or oscillating electromagnetic means
557  DF  .~.~.~> Intermittent or step-by-step operation

DEFINITION

Classification: 318/555

(under subclass 552) Subject matter in which one or more of the actuators are electromagnets (including electric motors).

SEE OR SEARCH THIS CLASS, SUBCLASS:

554, for this subject matter where there is electromagnetic actuating means for separately or individually actuated controller contacts.

SEE OR SEARCH CLASS

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, appropriate subclasses for electromagnetically operated switches, per se.

361, Electricity: Electrical Systems and Devices,

139, for miscellaneous relay and electromagnet circuits.