US PATENT SUBCLASS 116 / 146
.~.~.~ Ball contacts

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  DF  .~ Diaphragm horns {2}
143  DF  .~.~ Rotary striker {2}
146.~.~.~ Ball contacts

DEFINITION

Classification: 116/146

(under subclass 143) Device in which the ball-contacts are used either on the striker or on the diaphragm.