Apparatus for straightening automobile bodies

Claim 1

A TOOL FOR REPAIRING AUTOMOBILE BODIES COMPRISING (A) A HORIZONTAL BASE BEAM ADAPTED TO EXTEND PARALLEL WITH AND CLOSE TO A FLOOR ON WHICH THE TOOL RESTS; (B) A VERTICAL STANDARD ATTACHED NEAR AN INNER END OF THE BASE BEAM; (C) A FIXED SOCKET ATTACHED TO THE VERTICAL STANDARD AND ADAPTED TO RECEIVE AN END OF A HYDRAULIC RAM PISTONAND-CYLINDER ASSEMBLY; (D) A CARRIAGE VERTICALLY MOVABLE ALONG THE STANDARD AND ADAPTED TO RECEIVER A SECOND END OF A HYDRAULIC RAM PISTON-AND-CYLINDER ASSEMBLY, THE POSITION OF THE CARRIAGE AND THE FIXED SOCKET BEING SUCH THAT EXPANSION OF THE HYDRAULIC RAM PISTON-AND-CYLINDER ASSEMBLY DRIVES THE CARRIAGE IN A FIRST DIRECTION; (E) MEANS TENDING TO MOVE THE CARRIAGE IN A SECOND DIRECTION OPPOSITE TO THE FIRST DIRECTION UPON CONTRACTION OF THE HYDRAULIC RAM PISTON-AND-CYLINDER ASSEMBLY; (F) AN UPPER PULLEY BRACKET MOVABLE ALONG THE STANDARD TO A DESIRED POSITION; (G) MEANS FOR LOCKING THE UPPER PULLEY BRACKET OF THE STANDARD IN THE DESIRED POSITIONS; (H) AN UPPER PULLEY SUPPORTED BY THE UPPER PULLEY BRACKET; AND (I) A SLENDER FLEXIBLE TENSION MEMBER FASTENED TO THE CARRIAGE AND PASSING OVER THE UPPER PULLEY, SAID MEMBER ADAPTED TO TRANSMIT MOTION OF THE CARRIAGE TO A WORKPIECE.