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Posted
14 hours ago, chicagopcclcar said:

Pin and wedge.....a triangle piece of wood is inserted between the points and stock rail to prevent the points from moving as the train travels through the switch....prevents derailments. Pin and wedge has nothing to do with a train. Has to do this switching movements, like switching from one track to another.

DH  

That is the wedge part, the pin part is simply pinning down the trip at the signal.

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