Seat with seat belts

Claim 1

IN A SEAT HAVING A BASE FRAME COMPRISING A FRONT STRUCTURAL RAIL, A REAR STRUCTURAL RAIL SPACED FROM THE FRONT RAIL, AND SIDE STRUCTURAL RAILS JOINING THE ENDS OF SAID FRONT AND REAR RAILS TO PROVIDE A RIGID BASE FRAME, EACH SAID SIDE RAIL BEING SUBSTANTIALLY TUBULAR, A TUBULAR SUPPORT ADAPTED TO BE FIXED TO THE FLOOR OF A VEHICLE OR THE LIKE ADJACENT EACH SAID SIDE RAIL, EACH SAID SIDE RAIL BEING TELESCOPED OVER ITS RESPECTIVE SUPPORT, ROLLER BEARING MEANS INTERPOSED BETWEEN THE SURFACES OF SAID TUBULAR SUPPORT AND SAID SIDE RAIL AT LONGITUDINALLY SPACED POINTS ALONG SAID SIDE RAIL, THE IMPROVEMENT COMPRISING A SEAT BELT ATTACHING DEVICE MOUNTED ON EACH SAID SIDE RAIL, SAID DEVICE COMPRISING A BRACKET FIXED ON SAID SIDE RAILS, A PAIR OF TONG MEMBERS PIVOTED TO SAID BRACKET AND ADAPTED TO AT LEAST PARTIALLY ENCIRCLE SAID SIDE RAIL, A SEAT BELT, AND MEANS FOR FASTENING SAID SEAT BELT TO SAID TONG MEMBERS IN SUCH A MANNER THAT A FORCE ON SAID SEAT BELT CAUSES SAID TONG MEMBERS TO GRIP THE SIDE RAIL.