US PATENT SUBCLASS 116 / 142 R
.~ Diaphragm horns

Current as of: June, 1999
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116 /   HD   SIGNALS AND INDICATORS

137 R  DF  HORNS, WHISTLES AND COMPRESSIONAL WAVE GENERATORS {6}
142 R.~ Diaphragm horns {2}
143  DF  .~.~> Rotary striker {2}
142 FP  DF  .~.~> Fluid pressure operated {1}

Unofficial Alpha Subclasses: R FP FV

DEFINITION

Classification: 116/142

(under subclass 137) Devices include audible alarms in which a vibrating diaphragm is the source of sound.

SEE OR SEARCH THIS CLASS, SUBCLASS:

58, for vehicle energy actuated pneumatic signals.