The Fleming Valve

A children’s book of scientific facts inspired Ambrose Fleming to become an electrical engineer, and in 1904 he patented a device for detecting and rectifying radio waves, the thermionic vaccum tube diode. For fifty years, it remained an indispensable component of electronics, and drove the development of modern TV, radar and radio.

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Discovery and Invention (93) Edwardian Era (20) Science and Scientists (22) British History (377) History (777)

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