US PATENT SUBCLASS 340 / 393.1
.~.~ Plural armatures

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}
393.1.~.~ Plural armatures

DEFINITION

Classification: 340/393.1

Plural armatures:

(under subclass 392.1) Subject matter comprising at least two movable elements attracted by one or more electromagnets for actuating the striking means for generating the audible sounds.