Railroad switch heating control

Railway switches and signals – Electric actuation – Switch signals

Patent

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Details

246428, E01B 724

Patent

active

053482573

ABSTRACT:
A control and detector for a railroad switch point having a detector mechanism which is secured to a stockrail at the switch point where the stockrail is intended to be in contact with a corresponding switchrail. The detector mechanism is secured in a housing and has a plunger assembly biased in the direction of the switchrail and reciprocably secured preferably in alignment with the switchrail at the switch point. Electrical contacts connected to the plunger assembly report contact or a lack of contact between the switchrail and the stockrail. A contact on the switchrail at the switchpoint for reciprocates the plunger against the electrical reporting contacts when the switchrail is in physical contact with the stockrail at the switchpoint. A heating element is associated with the switchpoint and us energized in response to contact between the stockrail and switchrail as detected by the detector mechanism.

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