CONTROL APPARATUS FOR GENERATORS AND ROTARY CONVERTERS; FUSIBLE ENTRANCE AND BRANCH SERVICE EQUIPMENT; SAFETY AND DISCONNECT SWITCHES; SWITCHBOARDS; ELECTRIC HEATING DEVICES AND CONTROLS THEREFOR INCLUDING SPACE, IMMERSION, CONDUCTION AND INDUSTRIAL TYPE HEATERS; MAGNETIC BRAKES AND CLUTCHES, AND CONTROLS THEREFOR; LIFTING MAGNETS AND CONTROLS THEREFOR; CONDITION RESPONSIVE CONTROLS INCLUDING FLOAT, PRESSURE, LIQUID LEVEL AND VACUUM SWITCHES; REFRIGERATOR AND AIR CONDITIONING CONTROLS; MANUALLY, MECHANICALLY AND MOTOR OPERATED SWITCHES; RHEOSTATS; CONTACTORS, STARTERS AND RELAYS; ADJUSTABLE SPEED DRIVES OF THE GENERATOR, ELECTRONIC AND STATIC POWER SUPPLY TYPES AND CONTROLS THEREFOR; PRINTING PRESS AND GRAPHIC ARTS MACHINE DRIVES AND CONTROLS; PAPER-BREAK DETECTORS AND WEB SEVERING DEVICES; CONTROLS FOR COUNTING, CONVEYING, COLLATING, JOGGING AND STACKING; SPECIAL PURPOSE DRIVE SYSTEMS AND CONTROLS FOR INDUSTRIAL, MARINE, NAVAL AND PUBLIC WORKS USE; VOLTAGE AND CURRENT CONTROL AND REGULATING DEVICES; RESISTORS, RECTIFIERS, TRANSFORMERS, REACTORS AND AMPLIFIERS; INDUSTRIAL CIRCUIT CONTROLS OF THE ELECTRONIC AND SEMI-CONDUCTOR TYPES; TIMING CONTROLS OF THE INDUCTIVE, ELECTRO-PNEUMATIC, ELECTRONIC, SEMI-CONDUCTOR AND MOTOR-DRIVEN TYPES; CONTROLS FOR ARTICLE AND MATERIAL HANDLING AND SORTING SYSTEMS; TERMINAL BOARDS; CONNECTORS; WIRE TERMINATING DEVICES; LAMP SOCKETS; CONTROL APPARATUS ENCLOSURES; SIGNAL AND INDICATING LIGHTS AND SYSTEMS; SOLENOIDS; CRANE AND HOIST CONTROLS; ELECTRIC WELDING CONTROLS; ELECTRIC CONTROLS FOR RAILWAY LOCOMOTIVES; CONTROL PANELS; CONTROL CENTERS; OVERLOAD PROTECTIVE DEVICES; DISTRIBUTION CENTERS; BUSWAY SYSTEMS; BUS DUCTS, WIREWAYS, OUTLETS AND PLUG-IN DEVICES; LINEAR ACTUATING DEVICES; DATA ACCUMULATION, LOGGING AND PROCESSING EQUIPMENT; ELECTRONIC COUNTING AND TOTALIZING EQUIPMENT; NUMERICAL POSITIONING CONTROLS; DIGITAL MODULES; DIGITAL COMPUTER CONTROLS; PAPER INSPECTION EQUIPMENT; AND ACCESSORIES FOR AND PARTS OF THE FOREGOING APPARATUS