Western Electric D-155023 Photoelectric Cell
              Cellule photoélectrique
              Fotozelle
              Special unbased phototube with 360° annular field of view.
              Introduced in 1940.
              Similar to the 932A red/infrared photocell.
              Suspected of having been the detector in the Signal Corps experimental infrared airplane detector and/or wartime artillery-flash detectors.
              • United States Patent US2404802 - Electron discharge device
              • United States Patent US2404803 - Space discharge device
               
			  
			  Hauteur • Height • Höhe : 105 mm • 4" 1/8
			  Diamètre • Diameter • Durchmesser : 26 mm • 1"
              
              
               
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