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Sir (John) Ambrose Fleming (1849-1945), Electrical engineer and university teacher

Sitter in 7 portraits
Physicist and electrical engineer. Born in Lancaster, Fleming studied at St John's College, Cambridge. Whilst Professor of Electrical Engineering at University College London (1885-1926), he invented the Thermionic Valve (1904), which became widely used in the rapidly developing world of television, radio and early computing. Fleming was also a pioneer in the application of electricity to heating and lighting on a large scale. He was knighted in 1929.

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x165627

Sir (John) Ambrose Fleming

by Walter Stoneman
bromide print, 1923
NPG x165627

x124487

Sir (John) Ambrose Fleming

by Bassano Ltd
whole-plate glass negative, 25 March 1929
NPG x124487

x124488

Sir (John) Ambrose Fleming

by Bassano Ltd
whole-plate glass negative, 25 March 1929
NPG x124488

x91858

Sir (John) Ambrose Fleming

by Walter Benington, for Elliott & Fry
chlorobromide print, February 1932
NPG x91858

x82135

Sir (John) Ambrose Fleming

by Elliott & Fry
half-plate negative, 1932
NPG x82135

x43379

Sir (John) Ambrose Fleming

by Walter Stoneman
negative, 1917
NPG x43379

x94117

Sir (John) Ambrose Fleming

by Walter Benington, for Elliott & Fry
vintage print, 19 February 1932
NPG x94117