US PATENT SUBCLASS 340 / 397.3
.~.~ Interrupter

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

384.1  DF  AUDIBLE INDICATION {11}
392.1  DF  .~ Percussion-type sound producer (e.g., signal chimes or bells) {15}
397.3.~.~ Interrupter {1}
397.4  DF  .~.~.~> Having spring

DEFINITION

Classification: 340/397.3

Interrupter:

(under subclass 392.1) Subject matter including means for controlling the flow of current into an electromagnet to cause one element to strike against the other repeatedly.

SEE OR SEARCH THIS CLASS, SUBCLASS:

388.8, for interrupter of diaphragm sound producers.