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[ CONVEYOR BELTS AND CONTROLS THEREFOR ]

[ ELECTROMECHANICAL UNITS, COMPRISING ] ELECTRONIC CONTROLS, [ REMOTE CONTROL UNITS, AIR FLOW CONTROLS, ] MICROPROCESSORS, [ LOUDSPEAKERS, MICROPHONES, EARPHONES, TRANSMITTERS, RECEIVERS; MOBILE UNITS, COMPRISING TRANSMITTERS AND RECEIVERS, OHMMETERS, ELECTRIC BATTERIES, POWER SUPPLY UNITS, BATTERY CHARGING UNITS, AMPLIFIERS; SIGNALING AND MEASURING UNITS, COMPRISING AIRFLOW MONITORS, ANEMOMETERS, ELECTRIC SWITCHES, MULTIPLE PROGRAMMABLE SWITCHES, TEMPERATURE CONTROL UNITS, FREQUENCY COUNTERS ] AND CONVEYOR BELT CONTROLS