Wheeled conveyor

Claim 1

IN A CONVEYOR OF THE TYPE DESCRIBED, AN UPPER FRAME ASSEMBLY COMPRISING A PAIR OF TRANSVERSELY-SPACED TUBULAR MEMBERS, A PAIR OF SIMILARLY SPACED TUBULAR MEMBERS DISPOSED BELOW SAID FIRST-NAMED MEMBERS AND HAVING UPWARDLY CURVED END PORTIONS WHICH ARE WELDED AT THEIR UPPER ENDS TO THE LOWER SURFACES OF SAID FIRST-NAMED MEMBER, AND TUBULAR MEMBERS EXTENDING TRANSVERSELY BETWEEN SAID FIRST-NAMED MEMBERS AND HAVING THEIR ENDS WELDED TO THE INBOARD SURFACES OF SAID FIRST-NAMED MEMBERS, AND A LOWER FRAME ASSEMBLY COMPRISING A PLURALITY OF TRANSVERSELY-SPACED TUBULAR MEMBERS AND A PLURALITY OF LONGITUDINALLY-SPACED TUBULAR MEMBERS INTERCONNECTING THE TRANSVERSELY SPACED MEMBERS, SAID TRANSVERSELY-SPACED TUBULAR MEMBERS OF SAID LOWER FRAME ASSEMBLY BEING SUBSTANTIALLY PARALLEL WITH SAID TRANSVERSELY-SPACED TUBULAR MEMBERS OF SAID UPPER FRAME ASSEMBLY BEING DISPOSED IN SUBSTANTIALLY A COMMON HORIZONTAL PLANE WITH THOSE PORTIONS OF SAID SECOND-NAMED SPACED TUBULAR MEMBERS OF SAID UPPER FRAME ASSEMBLY WHICH EXTEND BETWEEN THE UPWARDLY CURVED END PORTIONS THEREOF, MEANS FOR REMOVABLY SECURING SAID LOWER FRAME ASSEMBLY TO SAID UPPER FRAME ASSEMBLY, SAID MEANS COMPRISING THREADED BUSHINGS IN THE ENDS OF SAID LONGITUDINALLY-SPACED TUBULAR MEMBERS OF THE LOWER FRAME ASSEMBLY, AND BOLTS EXTENDING THROUGH THE SECOND-NAMED TUBULAR MEMBERS OF THE UPPER FRAME ASSEMBLY AND INTO THREADED ENGAGEMENT WITH SAID BUSHINGS, A MOTOR SUPPORTED BY SAID LOWER FRAME ASSEMBLY, A PAIR OF SPACED WHEELS MOUNTED ADJACENT THE FRONT END OF SAID UPPER FRAME ASSEMBLY AND DRIVEN BY SAID MOTOR, PLATES MOUNTED ADJACENT THE REAR END OF THE UPPER FRAME ASSEMBLY, BRACKETS DISPOSED ADJACENT SAID PLATES IN PLANES PARALLEL WITH THE PLANES OF SAID PLATES, A SHAFT MOUNTED IN SAID BRACKETS, IDLER WHEELS SUPPORTED ON SAID SHAFT, AND BELTS DRIVEN BY SAID DRIVEN WHEELS, SAID BELTS RUNNING OVER SAID IDLER WHEELS AND UNDER SAID LOWER FRAME ASSEMBLY, SAID BRACKETS BEING MOUNTED FOR PIVOTAL MOVEMENT RELATIVELY TO SAID PLATES, WHEREBY TO ADJUST TENSION OF SAID BELTS.