VARIABLE-STROKE CAR SHIFTING APPARATUS

摘要

A car shifting apparatus for moving cars of different lengths includes axle-engaging dogs and a sensor mechanism actuated by a car wheel for controlling the respective engagements and disengagements of the dogs with the appropriate axles of the cars. Telescopic fluid pressure motors serve to advance and to retract the dogs through strokes which are dependent upon the distances between successive trucks of the cars as reflected by the action of the sensor mechanism.