Multiple coupler engaging head for railroad car positioner

In a railroad car positioning apparatus for moving one or more railroad cars along a track portion and having a carriage disposed for movement parallel to said track portion, means for guiding said carriage alongside said track portion, a car positioner arm carried by said carriage and having a distal extremity dimensioned to be positioned between a pair of coupled railroad cars for force applying engagement therewith centrally thereof, and means for selectively moving said arm into and out of car pushing position, the improvement which comprises in combination on said arm means:

• a. first force transferring means on said distal extremity for such force applying engagement between a pair of coupled railroad cars;
• b. separate force transferring means on said distal extremity for such force applying engagement with either end of a single uncoupled railroad car;
• c. means for shifting said force transferring means selectively to dispose either of them in its operative car pushing position, and the other in a stored inoperative position;
• and
• d. said separate force transmitting means in its stored inoperative position being sufficiently small to allow it to be positioned between coupled railroad cars without interference therewith.