Coronavirus (COVID-19) While museums are closed, the Science and Society Picture Library prints site is fully operational and we have added an FAQ page here.

Fleming diode, British, 1905.

 
Fleming diode, British, 1905.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

Description

This electronic diode was one of Sir John Ambrose Fleming's (1849-1945) own valves or vacuum tubes of the type used with the pioneering Marconi-Fleming radio receiver. The diode rectifies high frequency oscillations, that is, it converts them from alternating to direct current. The glas bulb has a high vacuum inside and contains a carbon filament surrounded by an aluminium tube open at both ends. Fleming invented the thermionic valve and pioneered the use of electricity for light and heat on a large scale.

Image Details

Image Ref.
 
10312438

© Science Museum / Science & Society Picture Library

buy a print

Select size
 
Select finish
 
How many prints?
 
£20.00
 

buy a framed print

buy a canvas

buy a framed canvas