Railway switch circuit controller

Details Railway switch circuit controller Railway switch circuit controller

1998-07-22

2000-05-16

Le, Mark T.

Railway switches and signals

Electric actuation

246219, 246220, 246225, 246253, B61L 500

Patent

active

060625147

ABSTRACT:
A railway switch circuit controller has a housing enclosing a laterally movable platform with a first and second target affixed thereupon. A first and second proximity sensor within the housing is positioned to detect the first and second target, respectively, such that the proximity sensor upon detection of the respective target may provide a signal. The platform is connected to a point detector connecting rod of a railway switch, thereby to be movable relative to the movement of the point detector connecting rod. In a first preferred embodiment, the platform may be cooperatively engaged with a rotational drive shaft that is connected to the point detector connecting rod, thereby to move laterally when the drive shaft is rotated by lateral movement of the rod. In the first preferred embodiment, the first and second proximity sensor may be fixed within the housing and the first and second target may be adjustable laterally within the platform towards and away from the other target, respectively.

REFERENCES:
patent: 1667473 (1928-04-01), Howe
patent: 2747056 (1956-05-01), Jefferson
patent: 5598992 (1997-02-01), Chew

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