Fleming, John Ambrose
Published: September 6, 2006, 5:38 pm
Updated: September 6, 2006, 5:38 pm
This article has been reviewed by the following Topic Editor:
Tom Lawrence
Sir John Ambrose Fleming (1849–1945), an English electrical engineer, was a leader in the development of electric lighting, the telephone, and wireless telegraphy in England. He is also remembered as the inventor of a thermionic valve (the first electron tube). In November 1904, he invented and patented a two-electrode radio rectifier, which he called the oscillation valve, a device used to amplify a signal. This went on to be known as the vacuum tube (American English) or thermionic valve (British English). Once used in most electronic devices, the vacuum tube has been replaced by the much smaller and less expensive transistor. Fleming’s invention is often cited as a key development in the early stages of electronics. He also designed early electric lighting systems for ships as well as the transmitter that made Marconi's first transatlantic transmission in 1901 possible.
Further Reading
Fleming - Biography (Hebrew University of Jerusalem, Institute of Chemistry)
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Citation
Cutler J. Cleveland (Lead Author);Tom Lawrence (Topic Editor) "Fleming, John Ambrose". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth September 6, 2006; Last revised Date September 6, 2006; Retrieved May 21, 2013 <http://www.eoearth.org/article/Fleming,_John_Ambrose>
The Author
Cutler J. Cleveland is Professor of Earth and Environment at Boston University, where he also is on the faculty of the Center for Energy and Environmental Studies. Professor Cleveland is Editor-in-Chief of the Encyclopedia of Energy (Elsevier, 2004), winner of an American Library Association award, the Dictionary of Energy (Elsevier, 2005), Handbook of Energy (Elsevier, forthcoming), and is the Founding Editor-in-Chief of the Encyclopedia of Earth. He is the recipient of the Adelma ... (Full Bio)
Sir John Ambrose Fleming (1849–1945), an English electrical engineer, was a leader in the development of electric lighting, the telephone, and wireless telegraphy in England. He is also remembered as the inventor of a thermionic valve (the first electron tube). In November 1904, he invented and patented a two-electrode radio rectifier, which he called the oscillation valve, a device used to amplify a signal. This went on to be known as the vacuum tube (American English) or thermionic valve (British English). Once used in most electronic devices, the vacuum tube has been replaced by the much smaller and less expensive transistor. Fleming’s invention is often cited as a key development in the early stages of electronics. He also designed early electric lighting systems for ships as well as the transmitter that made Marconi's first transatlantic transmission in 1901 possible.
Further Reading
Fleming - Biography (Hebrew University of Jerusalem, Institute of Chemistry)
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