Railroad switch indicator

Railway switches and signals – Signals – Switch or switch stand

Reexamination Certificate

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Reexamination Certificate

active

07735784

ABSTRACT:
A railroad switch indicator for visually signaling the position of a pair of railroad switchpoints independently of the mechanism for operating the switch. The indicator includes a sleeve with windows in which is reciprocated a slide with reflectors selected ones of which are visible through the windows of the sleeve for indicating safety conditions of the track. An arm with an upwardly extending finger engages the slide and is attached to the transverse bar that moves the switchpoints for reciprocation of the slide within the sleeve conjointly with movement of the switchpoints by the transverse bar.

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patent: 2740041 (1956-03-01), Marcum
patent: 3544960 (1970-12-01), Hayes
patent: 4837957 (1989-06-01), Egender
patent: 5117765 (1992-06-01), Wahl
patent: 5192038 (1993-03-01), Ocampo
patent: 5791605 (1998-08-01), Howie, II
patent: 5806809 (1998-09-01), Danner
patent: 6427949 (2002-08-01), Hager et al.

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