John Fleming

Updated: 09/15/2017 by Computer Hope

John FlemingName: John Ambrose Fleming

Born: November 29, 1849, Lancaster, Lancashire, England

Death: April 18, 1945 (Age: 95)

Computer related contributions

  • English electrical engineer and physicist known for inventing the first thermionic valve or vacuum tube, the diode, then called the kenotron in 1904.
  • He is also famous for the left hand rule (for electric motors).


  • Electric Lamps and Electric Lighting: A course of four lectures on electric illumination delivered at the Royal Institution of Great Britain (1894).
  • The Alternate Current Transformer in Theory and Practice "The Electrician" Printing and Publishing Company (1896).

Honors and awards

  • Hughes Medal (1910)
  • Albert Medal (1921)
  • Faraday Medal (1928)
  • Duddell Medal (1930)
  • IRE Medal of Honor(1933)
  • Franklin Medal (1935)
  • Fellow of the Royal Society