US PATENT SUBCLASS 246 / 217
AUDIBLE SWITCH AND SIGNAL INDICATORS


Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

217AUDIBLE SWITCH AND SIGNAL INDICATORS


DEFINITION

Classification: 246/217

(under the class definition) Audible indicators, such as bells and torpedoes, indicating that visual signals or switches are at the danger position or that dangerous conditions exist ahead.

SEE OR SEARCH THIS CLASS, SUBCLASS:

167+, for cab signals placed upon the train.

210+, for mechanism for placing torpedoes upon the tracks in response to the movement of a switch signal or drawbridge.