University of Houston
University of Houston: Engines of Our Ingenuity: Fleming's Electric Valve
Provides background information on the Edison Effect and then discusses Fleming's invention.
National High Magnetic Field Laboratory
Magnet Academy: John Ambrose Fleming
John Ambrose Fleming was an electronics pioneer who invented the oscillation valve, or vacuum tube, a device that would help make radios, televisions, telephones and even early electronic computers possible. A brilliant innovator,...