Selective closure latching mechanism for tilting dump vehicles

Claim 1

IN A COMBINATION WITH THE UNDERFRAME OF A VEHICLE HAVING TRUNNION BEARINGS ON EACH SIDE OF THE UNDERFRAME, A WAGON BODY, A SIDE DOOR HINGED AT THE BASE OF THE WAGON BODY ON EACH SIDE, PIVOTS CARRIED ON EACH SIDE OF THE WAGON BODY REMOVABLY SUPPORTED IN SAID TRUNNION BEARINGS, MEANS FOR TILTING THE WAGON BODY AROUND SAID PIVOTS TOWARD EACH SIDE OF THE UNDERFRAME, A BELLCRANK LEVER JOURNALED AT AN INTERMEDIATE POINT THEREOF ON EACH OF SAID PIVOTS LATERALLY DISPOSED ON OPPOSITE SIDES OF THE WAGON BODY WITH ONE END OF SAID LEVER BEING FREE AND THE OPPOSITE END OF SAID LEVER BEING CONNECTED BY A LINK TO THE SIDE DOOR ADJACENT THERETO, A TRANSVERSELY SLIDABLE LATCH BAR CARRIED BY THE WAGON BODY ADJACENT AND SUBSTANTIALLY PARALLEL TO THE FREE ENDS OF THE LEVERS ON OPPOSITE SIDES OF THE WAGON BODY, AN OFFSET DETENT ON THE FREE END OF EACH LEVER, A PAIR OF SPACED BLOCKS ON THE LATCH BAR, MEANS ON THE WAGON BODY ENGAGEABLE WITH THE LATCH BAR FOR SHIFTING SAID LATCH BAR TRANSVERSELY TO SIMULTANEOUSLY LOCATE ONE OF SAID SPACED BLOCKS CLEAR OF THE DETENT ON ITS ADJACENT LEVER JOURNALED ON ONE OF THE PIVOTS CARRIED ON THE SIDE OF THE WAGON BODY ABOUT WHICH SAID WAGON BODY IS TO BE TILTED AND THE OTHER OF SAID SPACED BLOCKS BENEATH THE DETENT ON ITS ADJACENT LEVER JOURNALED