Railroad switch machine

Railway switches and signals – Fluid-motor actuation – Electric control

Patent

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Details

246393, B61L 1106

Patent

active

061646016

ABSTRACT:
A railway switch stand includes a housing with a vertical shaft having a lower end connected to the switch throw rod, the shaft being rotatable to reciprocate the throw rod. A plate is mounted orthogonally on the shaft for rotation with the shaft, and has a plurality of bearings projecting upwardly therefrom around the shaft. A cam follower is mounted to move along a circle with the same radius as the bearings, with a spring mounted above the cam follower to apply a downward biasing force on the cam follower to retain the cam follower between a pair of bearings. A motor has a drive shaft oriented orthogonal to the vertical shaft and includes a drive crank affixed orthogonally to the drive shaft with radially projecting ends. One end of the crank is connected to a U-shaped yoke which in turn is pivotally connected to the cam follower. The other end of the crank has a counterweight, such that the crank will rotate the vertical shaft approximately one-quarter turn upon rotation of the crank approximately one-half turn on the drive shaft.

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Robotics and Automation Control, Inc. Brochure Undated.
Robotics and Automation Control, Inc. Brochure Jan. 1998.
Robotics and Automation Control, Inc. Brochure Feb. 3, 1997.
Robotics and Automation Control, Inc. Brochure Undated.

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