Adjustable fifth wheel mounting

Claim 1

AN ADJUSTABLE FRAME MOUNT WITH LOCKING MECHANISM ADAPTED TO BE MOUNTED ON THE FRAME OF A VEHICLE, SAID VEHICLE FRAME HAVING AT LEAST TWO LONGITUDINAL SIDE MEMBERS, SAID FRAME MOUNT WITH LOCKING MECHANISM CONPRISING, A RAIL ATTACHED TO EACH SIDE MEMBER, A MOUNTING PLATE SLIDABLY ENGAGING THE UPPER SURFACE OF SAID RAIL AND CORRUGATED TRANSVERSELY THERETO, SPACED RAIL KEEPERS ATTACHED TO SAID MOUNTING PLATE AND ENGAGING THE UNDER SURFACES OF SAID RAILS, A LOCK GUIDE ON EACH SIDE OF SAID MOUNTING PLATE IN THE MEDIAL PORTION THEREOF, A BOLT AXIALLY SLIDABLE IN EACH SAID LOCK GUIDE AND ORIENTED TRANSVERSELY OF SAID RAILS, A PLURALITY OF NOTCH-LIKE RECEIVERS IN THE OPPOSED AND FACING PORTIONS OF SAID RAILS, THE MATING END OF EACH SAID BOLT AND SAID RECEIVERS TAPERED AT ABOUT 7* TO PROVIDE LOCKING ENGAGEMENT OF SAID MOUNTING PLATES AT SELECTED POSITIONS ALONG SAID RAILS, A SPRING ATTACHED TO EACH SAID BOLT BIASING EACH SAID BOLT OUTWARDLY INTO ENGAGEMENT WITH SAID RECEIVERS, A CABLE HAVING SUITABLE GUIDE MEANS ATTACHED TO EACH SAID BOLT, AND OPERATING MEANS CONNECTED TO SAID CABLE SELECTIVELY TO DISENGAGE EACH SAID BOLT FROM SAID RECEIVERS.