Railway switch stand having slide block actuator and two indepen

Details Railway switch stand having slide block actuator and two indepen Railway switch stand having slide block actuator and two indepen

1993-12-28

1994-12-27

Oberleitner, Robert J.

Railway switches and signals

Fluid-motor actuation

246393, B61L 500

Patent

active

053757963

ABSTRACT:
A railway switch stand includes a reciprocating toggle arm which extends from the stand to operate a railway track switch between open and closed positions. The toggle arm has one end connected to a block which is operably mounted on the switch stand base for reciprocating forward and rearward movement. Forward and rearward brackets on the base prevent movement of the block beyond predetermined forward and rearward positions. An hydraulic cylinder connected to the block selectively moves the block between forward and rearward positions so as to reciprocate the toggle arm and throw the track switch. A pair of throw arms are pivotally disposed on opposite sides of the block relative to the blocks reciprocating path, with a forward end of the throw arm connected to the block. The throw arms include an extensible rod projecting from an elongated housing and biased forwardly therefrom, with the housing pivotally connected to the base plate, such that the biased extensible rods apply force to the block so that the block is in positive abutting contact with either the forward bracket or the rearward bracket.

REFERENCES:
patent: 768205 (1904-08-01), Thullen
patent: 801440 (1905-10-01), Colemar
patent: 3127138 (1964-03-01), Wilson et al.
patent: 3136509 (1964-06-01), Magnus
patent: 3363097 (1968-01-01), Wilhelm et al.
patent: 3621237 (1971-11-01), Hylen
patent: 3708660 (1973-01-01), Speight
patent: 4022409 (1977-05-01), Ensink et al.
patent: 5052642 (1991-10-01), Peters

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