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PHOTOELECTRIC CONTROL, PHOTOELECTRIC TIMING CONTROL, ELECTRONIC CONTROL APPARATUS INCLUDING A TRANSFORMER WHICH IS RESPONSIVE TO CURRENT CHANGES IN AN ASSOCIATED LOAD CIRCUIT, LIGHT SOURCE FOR AN OPTICAL SYSTEM ASSOCIATED WITH AN ELECTRONIC CIRCUIT, PHOTOELECTRIC CONTROL WITH AND WITHOUT A PLATE CIRCUIT RELAY FOR CONTROLLING ELECTROMECHANICAL DEVICES, ELECTRONIC CONTROLS RESPONSIVE TO CURRENT CHANGES IN AN ASSOCIATED ELECTRIC CIRCUIT THAT IS SUBJECTED TO INTERMITTENT LOAD INCREASES, AND ELECTRONIC CONTROL APPARATUS INCLUDING SUPERSONIC, INFRARED, LIQUID LEVEL, LUCITE ROD BIN LEVEL, PROXIMITY SWITCH CONTROLS

ELECTRONIC INSPECTION MACHINE IN WHICH VARIATIONS IN THE SIZE OR SHAPE OF OBJECTS ARE DETECTED AND CHECKED BY SUCCESSIVELY POSITIONING THE OBJECTS IN AN OPTICAL SYSTEM THAT IS ASSOCIATED WITH AN ELECTRONIC CIRCUIT, AND ELECTRONIC COUNTER IN WHICH THE OBJECTS TO BE COUNTED ARE PASSED THROUGH THE FOCAL POINT OF AN OPTICAL SYSTEM THAT IS ASSOCIATED WITH AN ELECTRONIC CIRCUIT