US PATENT SUBCLASS 246 / 169 S
.~.~ Sound detectors


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

167 R  DF  CAB SIGNAL OR TRAIN CONTROL {20}
169 R  DF  .~ Train defect {3}
169 S.~.~ Sound detectors

Unofficial Alpha Subclasses: R A D S

DEFINITION

Classification: 246/169

(under subclass 167) Subject matter having means automatically actuated by defects in or breakage of parts of

the rolling-stock or by improper adjustment of appliances, which are liable to cause disaster, such as broken wheel-flanges, fallen brake-beams, defects in running-gear and brake systems, improper coupling of air-brake pipes, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

167, and all subclasses mentioned in the search notes appended thereto, for other systems having cab and control features.