Laterally shiftable hitch with resilient mounting

Claim 1

A RESILIENT MOUNTING COMPRISING A PAIR OF SPRING SUPPORT ASSEMBLIES DISPOSED ON FIXED LATERALLY DISPOSED RELATIONSHIP, EACH SAID ASSEMBLY COMPRISING AN OUTER MEMBER HAVING AN OPEN FRONT AND A BACK, SAID BACK HAVING AN ELONGATED VERTICALLY DISPOSED OPENING THEREIN OF UNIFORM WIDTH, A MOVABLE MEMBER PARTIALLY DISPOSED WITHIN SAID OUTER MEMBER, A PAIR OF SPRINGS LOCATED BETWEEN SAID MEMBERS IN VERTICALLY OPPOSED RELATIONSHIP SUCH THAT SAID MEMBERS CAN MOVE VERTICALLY RELATIVE TO EACH OTHER, AND MEANS EXTENDING THROUGH SAID ELONGATED OPENING FOR HOLDING SAID MOVABLE MEMBER FROM FORWARD MOVEMENT RELATIVE TO SAID OUTER MEMBER, SAID MEANS COMPRISING A GUIDE MEMBER OF LESS THAN SAID UNIFORM WIDTH FIXEDLY ATTACHED TO SAID MOVABLE MEMBER AND EXTENDING THROUGH SAID ELONGATED OPENING AND A RETAINER PLATE ATTACHED TO SAID GUIDE MEMBER OUTWARDLY OF SAID BACK, A TRANSVERSELY DISPOSED TRACK STRUCTURE RIGIDLY CONNECTED TO BOTH OF THE SAID MOVABLE MEMBERS WHEREBY THE TRACK STRUCTURE CAN MOVE VERTICALLY OR TWIST RELATIVE TO SAID SPRING SUPPORT ASSEMBLIES, AND A CARRIAGE ADAPTED TO TRANVERSE THE SAID TRACK STRUCTURE.