Abstract: A robotic manipulator includes a main upright frame on which two extensible arms are journalled. One of the arms consists of a pair of laterally spaced lead screws connected together at their front and rear ends and the other consists of a lead screw or sprocket-engaged chain connected to the front connected ends of the two lead screws. The motors for extending and retracting the arms are mounted on the main frame. A tool at the forward connected ends of the arms are controlled by parallelogram linkages which are also powered by motors mounted on the main frame.

Abstract: A gravity conveyor system wherein headed workpieces are transported individually along a downwardly inclined chuting structure by supporting the workpieces on work carriers of the roller type. The workpieces are supported on arms journalled in and extending laterally from the work carrier rollers. A loading and unloading station are disclosed in which the power necessary for loading the workpieces onto the carriers and removing them from the carriers is supplied solely by the gravitational force acting on the carriers.

Abstract: A workpiece elevator is disclosed having a series of workpiece carriers thereon which move in an endless vertical path and from which workpieces are discharged by gravity. On each carrier there is mounted a latch mechanism which selectively blocks or opens the outlet end of each carrier. The elevator includes a plurality of outlet chutes for receiving workpieces from the carriers. Members are mounted on a stationary part of the elevator for selectively actuating the latch mechanism as the outlet of each carrier aligns with an outlet chute in accordance with the workpiece requirements of the outlet chute.

Abstract: A workpiece elevator is disclosed having a series of workpiece carriers thereon which move in an endless vertical path and from which workpieces are discharged by gravity. On each carrier there is mounted a latch mechanism which selectively blocks or opens the outlet end of each carrier. The elevator includes a plurality of outlet chutes for receiving workpieces from the carriers. Members are mounted on a stationary part of the elevator for selectively actuating the latch mechanism as the outlet of each carrier aligns with an outlet chute in accordance with the workpiece requirements of the outlet chute.