US PATENT SUBCLASS 246 / 486
.~ Bridge warnings


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

473 R  DF  SIGNALS {12}
486.~ Bridge warnings


DEFINITION

Classification: 246/486

(under subclass 473) Subject matter having means placed at the approach to overhead or highway bridges as a warning to brakemen on the roofs of cars that there is not sufficient clearance for safety. They are usually yielding obstructions, such as hanging cords, rods resiliently mounted, etc.