US PATENT SUBCLASS 340 / 390.2
.~.~.~ Having spring

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

384.1  DF  AUDIBLE INDICATION {11}
388.1  DF  .~ Diaphragm (e.g., horn or buzzer) {7}
390.1  DF  .~.~ Rotary actuator {1}
390.2.~.~.~ Having spring

DEFINITION

Classification: 340/390.2

Having spring:

(under subclass 390.1) Subject matter wherein the driving mechanism comprises a resilient member for holding a driving shaft in a desired position by exerting a thrust force upon the shaft or for retracting the means for agitating the diaphragm.