John Ambrose Fleming (29.02.1849-18.04.1945) — an English physicist, a Fellow of the Royal Society (1892). He was born in Lancaster. He graduated from the University of London (1870). In 1877-81 he worked at the Cavendish Laboratory, in 1881—82 he was professor at Nottingham University, in 1882 —85 consultant to the Edison company in London, and in 1885 —1926 professor at the University of London.
His work concerned radiotelegraphy, radiotelephony and radio and electrical engineering. He proposed the right-hand rule for determining the direction of the induction current in a conductor (Fleming's rule). In 1904 he invented the two-electrode electron tube (the diode).
Medals of D. Hughes (1910) and M. Faraday (1928).