Railroad switch machine

Details Railroad switch machine Railroad switch machine

1981-05-04

1984-01-31

Scherbel, David A.

Railway switches and signals

Switch stands

246258, 91433, 200153LB, B61L 704, B61L 504, F15B 1110

Patent

active

044285523

ABSTRACT:
A high-speed switch machine for actuating railroad switch points. The machine has an electric motor which drives a hydraulic pump. The pump supplies pressure fluid to a hydraulic cylinder adapted to move the switch points from an initial to a second limit position. A four-way, two-position hydraulic control valve directs fluid to the cylinder such that the cylinder automatically operates in an extension and retraction cycle. The uni-directional motor and two-position control valve minimize response times of the actuating components so that the switch points are thrown in a short time period.

REFERENCES:
patent: 1162693 (1915-11-01), Henry
patent: 1893246 (1933-01-01), Robertson et al.
patent: 3158345 (1964-11-01), Wilhelm et al.
patent: 3270582 (1966-09-01), Barth
patent: 3363097 (1968-01-01), Wilhelm et al.
patent: 3427448 (1969-02-01), Redelman
patent: 3483344 (1969-12-01), Hermle
patent: 3642086 (1972-02-01), Andrews
patent: 4036106 (1977-07-01), Athy, Jr.
patent: 4213588 (1980-07-01), Bowles

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