MACHINE PARTS, NAMELY, ROLLER BEARINGS AND BUSHING; CAR PULLERS, NAMELY, POWER DRIVEN CAPSTANS OR WINCHES FOR PULLING CARS AND HEAVY LOADS AND OPERATING HOISTS; BELT CONVEYORS, PAN CONVEYORS, FLIGHT CONVEYORS, BUCKET CONVEYORS, EN MASSE FLOW CONVEYORS, SCREW CONVEYORS, AND PARTS THEREOF FOR COAL AND THE LIKE; ELEVATING CONVEYORS; SKIP HOISTS; MACHINES FOR CRUSHING AND SIZING COAL, SUGAR, CHEMICALS AND SIMILAR FRIABLE MATERIALS; FEEDERS OF THE CONVEYOR TYPE FOR WITHDRAWING MATERIAL FROM BINS AND HOPPERS IN UNIFORM VOLUMES; GATES, VALVES AND LOADING SPOUTS FOR CONTROLLING AND DIRECTING THE FLOW OF MATERIAL IN MATERIAL HANDLING EQUIPMENT; GLASS BATCH MIXERS, CONVEYORS, BUCKET ELEVATORS AND SKIP HOISTS; HAND DRIVEN HOISTS, SKIP TYPE HOISTS AND POWER DRIVEN HOISTS OF GENERALLY MECHANICAL NATURE; HOPPERS AND BINS FOR MATERIAL HANDLING EQUIPMENT; JOURNAL BOXES, BELT PULLEYS, SHAFTING AND DRIVE AND CONVEYOR CHAINS; MECHANICAL LOADERS AND UNLOADERS FOR CARS AND BOATS AND MATERIAL PILERS; GEAR SPEED REDUCERS; AND GEAR TRANSMISSION MECHANISMS