73309866
May 11, 1981
Jun 7, 1983
Controls for Burners and Boilers; Smoke Density/Opacity Monitors; Flame Scanner and Detection Assemblies; Fault Annunciator and Fault Diagnostic Apparatus; Projection Type Fault Indicators; Logic Circuit Cards for Controls and Indicators; Electrically Operated Ball and Cock Valves; Air and/or Gas Pressure Actuated Switches; Electric Switches; Relays; Photoelectric Presence Sensors; Pattern Recognition Apparatus; Reflex Code Reading Apparatus; Infrared Detectors; Ultraviolet Detectors; 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; Voltage/Ampere Meters; Transformers; Electric Bells; Electric Warning Horns; Lenses; Lens Caps, Mounts and Retainers; Mounting Bases and Housings; Plug-In Control Modules; Counters; Optical Filters and Flame and Programming Controls for Industrial Fuel Burners
Electrical and Scientific Apparatus