Photoelectric Pressure Sensors; [ Pattern Recognition Apparatus; Reflex Code Reading Apparatus; ] Photoelectric Detectors; [ Photoelectric Scanners; ] Photoelectric Controls; Photoelectric Receivers [; Reflectors; Fluid and Bulk Material Level Sensing Apparatus; Resistance Sensing Apparatus; Probes for Liquid Level Sensing Apparatus; Probes for Liquid Resistance Sensing Apparatus; Mounting Bases and Housing; Plug-In Control Modules; Counters; Relays; Lenses; Light Filters ]

ELECTRICAL SIGNAL AMPLIFYING AND/OR RELAYING APPARATUS OPERATED BY PHENOMENA DETECTED PHOTOELECTRICALLY OR BY MEANS OF OTHER VARIABLE IMPEDANCE DEVICES SUCH AS ELECTRICAL PROBE ELEMENTS IN CONTACT WITH OR DISPOSED TO COME INTO CONTACT WITH AN AGENCY TO BE CONTROLLED, ELECTRICAL PROBE ELEMENTS AND SIMILAR APPARATUS FOR USE WITH SUCH RELAYING AND/OR SIGNAL AMPLIFYING APPARATUS, AND ELECTRICALLY OPERATED ILLUMINATION SOURCES FOR USE WITH SAID SIGNAL AMPLIFYING AND/OR RELAYING APPARATUS WHEN PHOT...

ELECTRIC APPARATUS FOR VARYING THE CURRENT INTENSITY IN A CONTROLLED CIRCUIT, DEPENDENT UPON VARIATIONS OF RADIANT ENERGY AFFECTING A CONTROLLED CIRCUIT, SAID APPARATUS ADAPTED FOR USE WITH INDUSTRIAL EQUIPMENT INCLUDING SIGNALS SAFETY APPLIANCES, COUNTERS, COMBUSTION SUPERVISORS, AUTOMATIC MOVEMENTS OR CONTROLS

PHOTOELECTRIC CONTROLS, LIGHT SOURCES, PHOTOELECTRIC RECEIVERS, LIGHT SOURCE FAILURE RELAYS, LIGHT SOURCE TRANSFORMERS AND ACCESSORY HOUSINGS