Grade-crossing motorist warning system

Railway switches and signals – Electric automatic highway signals – mine doors – and gates

Patent

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Details

246293, 340 47, B61L 2928

Patent

active

039632024

ABSTRACT:
A railroad-highway grade-crossing warning system is accomplished by control circuitry for synchronizing the flash rates of incandescent and xenon lamps so as to produce a continuously uniform signal pattern which can be rapidly identified and understood by a motorist.

REFERENCES:
patent: 2679635 (1954-05-01), Hart
patent: 3205478 (1965-09-01), Scheg
patent: 3444512 (1969-05-01), Reinitz
Railway Signalling, Dec. 1940, "Gates, Signals and Traffic Lights at a Wabash Crossing".

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