Rail guard

Details Rail guard Rail guard

1994-05-09

1995-03-14

Wirthlin, Alvin

Railway switches and signals

Roadway-defect protection

Electric

33651, 335231, 200573, B61L 2304

Patent

active

053970837

ABSTRACT:
A rail guard for monitoring the limits of transverse inclination and extension between the rails of a railroad track and transmitting an indication when these limits are breached. The rail guard has a plurality of tension switches, each switch being coupled between the outer edge of a railroad track and a penetrable surface near the railroad track. The tension switches are coupled in series and in turn are coupled to a relay. The relay controls a warning signal when one or more of the switches is in an open position.

REFERENCES:
patent: 857436 (1907-06-01), Bond
patent: 1383093 (1921-06-01), Finch
patent: 2175655 (1939-10-01), Allen
patent: 3839607 (1974-10-01), Ogihara
patent: 4008870 (1977-02-01), Gardner et al.

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