[nb-NO]Title[nb-NO]
Four-Electrode Valve
Valve
[nb-NO]Description[nb-NO]
Fleming Four-electrode valve. British patent 149, 422, 12 May 1919. (see also Fleming "Thermoinic Valve). 2 pairs of anodes (nickel) arranged symetrically around filament. Used as a detector. Bulb broken and almost entirely missing, anodes have therefore suffered also.
Fleming Four-electrode valve. British patent 149, 422, 12 May 1919. (see also Fleming "Thermoinic Valve). 2 pairs of anodes (nickel) arranged symetrically around filament. Used as a detector. Bulb broken and almost entirely missing, anodes have therefore suffered also. There is a five pin base on the valve.
Asbestos Inspection - Non-Asbestos.
[nb-NO]Material[nb-NO]
[nb-NO]Dimensions[nb-NO]
[nb-NO]Creator[nb-NO]
Marconi Osram
Electronic and Electrical Engineering
[nb-NO]Object number[nb-NO]
LDUSC-EE-160
159
UCL Science and Engineering Collections
