1. A BUFFER CARRIED ON ONE RAILWAY CAR HAVING A HOOK COUPLER ADAPTED TO BE ENGAGED WITH A DRAW HOOK COUPLER CARRIED BY ANOTHER CAR, SAID BUFFER COMPRISING A CASING CARRYING A PLURALITY OF RUBBER PADS, A STEM CARRYING A HEAD AND ADAPTED TO PASS THROUGH SAID PADS FOR ENGAGEMENT WITH RESILIENT MEANS, A PLUNGER MOVABLY CARRIED BY SAID CASING AND ADAPTED TO PLACE SAID PADS UNDER COMPRESSION IN RESPONSE TO MOVEMENT OF SAID HEAD IN ONE DIRECTION FOR A PREDETERMINED DISTANCE, A RING ENCIRCLING SAID STEM BETWEEN SAID HEAD AND SAID PLUNGER WHEREBY SAID HEAD IS ADAPTED TO EXERT COMPRESSIVE FORCE AGAINST SAID PLUNGER, AND A PERIPHERAL SHOULDER ON SAID RING ADAPTED TO ENCIRCLE SAID PLUNGER FOR MOVEMENT WITH SAID PLUNGER AND AGAINST SAID CASING AFTER SAID RING IS ENGAGED BY SAID HEAD WHEREBY THE MOVEMENT OF SAID HEAD IN SAID ONE DIRECTION IS LIMITED BY AN AMOUNT CORRESPONDING TO THE HEIGHT OF SAID SHOULDER TO PREVENT SAID HOOK COUPLER FROM COLLIDING WITH A DRAW HOOK COUPLER INTERCONNECTED THEREWITH.