J. Ambrose Fleming, British inventor of the diode

J. Ambrose Fleming, British inventor of the diode

H406/0112 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 50.1MB

Downloadable file size: 1.5MB

Price image Pricing

Please login to use the price calculator


Credit: SCIENCE PHOTO LIBRARY

Caption: J. Ambrose Fleming. Portrait of Sir John Ambrose Fleming (1849-1945), British physicist and inventor of the thermionic valve (diode). In 1877 Fleming joined Cambridge University and worked for J.C. Maxwell. In 1881 he became professor of mathematics and physics at University College, Nottingham. During 1882-5 he was a consultant to Edison's London office. He became professor of electrical technology at University College, London in 1885 and in the 1890s worked with G. Marconi. In 1904 Fleming invented a thermionic valve which allowed electricity to flow in one direction only. It was used in early electronics but has been replaced by solid-state devices.

Release details: Model release not available. Property release not required.

Keywords: diode, electrical engineer, fleming, inventor, john, marconi's assistant, maxwell's assistant, physicist, portraits, sir john, surname f, thermionic, thermionic valve, valve

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.