▼ Menu

405OR

 
    
Extras ▼

 

This photocell is a mystery. The only identification is 405 and OR but this may not be the Type designation.
The construction is of a semi cylindrical photosensitive cathode and a ring anode in front.
The front view.
The top supports for both electrodes are fixed into a clear glass rod.
The thin glass tube envelope is 15 mm in diameter and, excluding the base pins, is 48 mm tall.
Reference: Observation.

 

Updated September 14, 2020.
shape:thin.glass.tube construction:pinch type:photocell age:1930.1940 base: pin:
Return to Main Index