English electrical engineer and physicist (1849–1945)
For other people named John Fleming, see John Fleming (disambiguation).
Sir John Ambrose Fleming
Fleming in 1890
Born
John Ambrose Fleming
(1849-11-29)29 November 1849
Lancaster, Lancashire, England, United Kingdom
Died
18 April 1945(1945-04-18) (aged 95)
Sidmouth, Devon, England, United Kingdom
Nationality
British
Alma mater
University College London Royal College of Science
Known for
Fleming's left hand rule Fleming's right-hand rule Fleming valve
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[1]
Scientific career
Fields
Electrical engineer and physicist
Institutions
University College London University of Nottingham Cambridge University Edison Electric Light Co. Victoria Institute
Doctoral advisor
Frederick Guthrie
Doctoral students
Harold Barlow
Other notable students
Hidetsugu Yagi Balthasar van der Pol
Sir John Ambrose Fleming FRS[1] (29 November 1849 – 18 April 1945) was an English electrical engineer and physicist who invented the first thermionic valve or vacuum tube,[2] designed the radio transmitter with which the first transatlantic radio transmission was made, and also established the right-hand rule used in physics.[3]
He was the eldest of seven children of James Fleming DD (died 1879), a Congregational minister, and his wife Mary Ann, at Lancaster, Lancashire, and baptised on 11 February 1850.[4] A devout Christian, he once preached at St Martin-in-the-Fields in London on evidence for the resurrection.
In 1932, he and Douglas Dewar and Bernard Acworth helped establish the Evolution Protest Movement. Fleming bequeathed much of his estate to Christian charities, especially those for the poor. He was a noted photographer, painted watercolours, and enjoyed climbing the Alps.
^ abEccles, W. H. (1945). "John Ambrose Fleming. 1849-1945". Obituary Notices of Fellows of the Royal Society. 5 (14): 231–242. doi:10.1098/rsbm.1945.0014. S2CID 192193265.
^Harr, Chris (23 June 2003). "Ambrose J. Fleming biography". Pioneers of Computing. The History of Computing Project. Retrieved 30 April 2008.
^"Right and left hand rules". Tutorials, Magnet Lab U. National High Magnetic Field Laboratory. Retrieved 30 April 2008.
^Brittain, J. E. (2007). "Electrical Engineering Hall of Fame: John A. Fleming". Proceedings of the IEEE. 95: 313–315. doi:10.1109/JPROC.2006.887329.
and 25 Related for: John Ambrose Fleming information
Sir JohnAmbroseFleming FRS (29 November 1849 – 18 April 1945) was an English electrical engineer and physicist who invented the first thermionic valve...
The Fleming valve, also called the Fleming oscillation valve, was a thermionic valve or vacuum tube invented in 1904 by English physicist JohnAmbrose Fleming...
tube. The simplest vacuum tube, the diode (i.e. Fleming valve), was invented in 1904 by JohnAmbroseFleming. It contains only a heated electron-emitting...
the phenomenon for use in a DC voltmeter. About 20 years later, JohnAmbroseFleming (scientific adviser to the Marconi Company and former Edison employee)...
JohnFleming may refer to: JohnFleming (14th-century MP) for Rochester JohnFleming, 1st Earl of Wigtown (1567–1619), Scottish aristocrat and diplomat...
1904, the English physicist JohnAmbroseFleming invented the two-electrode vacuum-tube rectifier, which he called the Fleming oscillation valve. for which...
amplifying vacuum tubes revolutionized radio receivers and transmitters. JohnAmbroseFleming developed a vacuum tube diode. Lee de Forest placed a screen, added...
emission. The first true electronic vacuum tubes, invented in 1904 by JohnAmbroseFleming, used this hot cathode technique, and they superseded Crookes tubes...
vacuum tube used in radio was the thermionic diode or Fleming valve, invented by JohnAmbroseFleming in 1904 as a detector for radio receivers. It was an...
needle dipping into a cup of dilute acid. The same year JohnAmbroseFleming invented the Fleming valve or thermionic diode which could also rectify an...
the lengths of the sides of a right angle triangle) developed by JohnAmbroseFleming in 1889. Impedances could thus be added vectorially. Kennelly realised...
rectification. The simplest vacuum tube, the diode invented in 1904 by JohnAmbroseFleming, contains only a heated electron-emitting cathode and an anode. Electrons...
kind of vacuum tube) was invented in 1904 by the English physicist JohnAmbroseFleming. He developed a device he called an "oscillation valve" (because...
standards, author and editor Gerhard Fischer Handheld metal detector JohnAmbroseFleming Inventor of the thermionic valve (vacuum tube) Tommy Flowers Designer...
operation was facilitated by the invention of the vacuum tube in 1904 by JohnAmbroseFleming. At the same time that digital calculation replaced analog, purely...
will later become known as Crohn's disease. Vacuum tube invented by JohnAmbroseFleming. James H. Jeans's The Dynamical Theory of Gases is published in Cambridge...
The AmbroseFleming Medal for Information and Communications was first awarded in 2007 to Professor Simon Kingsley. It was named after JohnAmbrose Fleming...
3 mm metal ball resonators. Microwave spectroscopy experiment by JohnAmbroseFleming in 1897 showing refraction of 1.4 GHz microwaves by paraffin prism...
possibly implying that Ambrose and Adrian inherited at least some of their prodigious mental abilities from their father. Gail Fleming (Amy Sedaris) is Sharona's...
thermionic emission as the "Edison effect." The British physicist JohnAmbroseFleming, working for the British "Wireless Telegraphy" Company, discovered...
valve (named diode because it had two electrodes) was invented by JohnAmbroseFleming while working for the Marconi Company in London in 1904. The diode...