• Thumbnail for John Ambrose Fleming
    Sir John Ambrose Fleming (29 November 1849 – 18 April 1945) was an English electrical engineer and physicist who invented the vacuum tube, designed the...
    22 KB (2,408 words) - 14:41, 15 December 2024
  • politician and businessman Ambrose Gaines IV (born 1959), American swimmer better known as Rowdy Gaines John Ambrose Fleming (1849–1945), English electrical...
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  • Thumbnail for Fleming valve
    The Fleming valve, also called the Fleming oscillation valve, was a thermionic valve or vacuum tube invented in 1904 by English physicist John Ambrose Fleming...
    11 KB (1,405 words) - 18:01, 15 September 2024
  • Thumbnail for Fleming's left-hand rule for motors
    Fleming's right-hand rule for generators. They were originated by John Ambrose Fleming, in the late 19th century, as a simple way of working out the direction...
    11 KB (1,508 words) - 22:18, 12 December 2024
  • Thumbnail for Fleming's right-hand rule
    engineer John Ambrose Fleming, who invented them. An equivalent version of Fleming's right-hand rule is the left-hand palm rule. Fleming's left-hand...
    3 KB (649 words) - 14:04, 28 October 2024
  • Thumbnail for Vacuum tube
    tube. The simplest vacuum tube, the diode (i.e. Fleming valve), was invented in 1904 by John Ambrose Fleming. It contains only a heated electron-emitting...
    120 KB (15,367 words) - 03:14, 22 December 2024
  • Thumbnail for Diode
    the phenomenon for use in a DC voltmeter. About 20 years later, John Ambrose Fleming (scientific adviser to the Marconi Company and former Edison employee)...
    64 KB (7,414 words) - 22:32, 24 December 2024
  • Fleming, American historian John Fleming (naturalist) (1785–1857), Scottish naturalist John Adam Fleming, American physicist John Ambrose Fleming, English...
    10 KB (1,254 words) - 09:31, 17 December 2024
  • first practical method for telegraphy. 1905: The Englishman Sir John Ambrose Fleming invents the first electron tube. 1906 Robert von Lieben patented...
    52 KB (4,488 words) - 17:11, 9 December 2024
  • John Fleming may refer to: John Fleming (14th-century MP) for Rochester John Fleming, 1st Earl of Wigtown (1567–1619), Scottish aristocrat and diplomat...
    3 KB (447 words) - 19:30, 26 November 2023
  • Thumbnail for Invention of radio
    1904, the English physicist John Ambrose Fleming invented the two-electrode vacuum-tube rectifier, which he called the Fleming oscillation valve. for which...
    108 KB (12,874 words) - 14:30, 15 December 2024
  • 16 H. W. Beecher, 16 William Dunkerley, 16 Christian Bovee, 17 John Ambrose Fleming, 18 G. A. Sala, 18 Marcus Antonius, 18 South, 19 Johann Lavater,...
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  • will later become known as Crohn's disease. Vacuum tube invented by John Ambrose Fleming. James H. Jeans's The Dynamical Theory of Gases is published in Cambridge...
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  • Thumbnail for History of radio
    amplifying vacuum tubes revolutionized radio receivers and transmitters. John Ambrose Fleming developed a vacuum tube diode. Lee de Forest placed a screen, added...
    72 KB (8,457 words) - 01:40, 16 December 2024
  • Thumbnail for Triode
    vacuum tube used in radio was the thermionic diode or Fleming valve, invented by John Ambrose Fleming in 1904 as a detector for radio receivers. It was an...
    31 KB (3,708 words) - 17:01, 8 December 2024
  • Thumbnail for Cathode ray
    emission. The first true electronic vacuum tubes, invented in 1904 by John Ambrose Fleming, used this hot cathode technique, and they superseded Crookes tubes...
    19 KB (2,649 words) - 15:07, 19 November 2024
  • Thumbnail for Radio broadcasting
    kind of vacuum tube, was invented in 1904 by the English physicist John Ambrose Fleming. He developed a device that he called an "oscillation valve," because...
    32 KB (3,892 words) - 06:45, 1 December 2024
  • Thumbnail for Institution of Engineering and Technology
    The Ambrose Fleming Medal for Information and Communications was first awarded in 2007 to Professor Simon Kingsley. It was named after John Ambrose Fleming...
    30 KB (3,554 words) - 01:39, 27 September 2024
  • needle dipping into a cup of dilute acid. The same year John Ambrose Fleming invented the Fleming valve or thermionic diode which could also rectify an...
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  • Thumbnail for Thermionic emission
    occasionally used to refer to thermionic emission itself. British physicist John Ambrose Fleming, working for the British Wireless Telegraphy Company, discovered...
    32 KB (3,566 words) - 13:04, 15 November 2024
  • standards, author and editor Gerhard Fischer Handheld metal detector John Ambrose Fleming Inventor of the thermionic valve (vacuum tube) Tommy Flowers Designer...
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  • Thumbnail for Valve amplifier
    valve (named diode because it had two electrodes) was invented by John Ambrose Fleming while working for the Marconi Company in London in 1904. The diode...
    21 KB (2,895 words) - 08:56, 13 November 2024
  • Thumbnail for Telecommunications
    rectification. The simplest vacuum tube, the diode invented in 1904 by John Ambrose Fleming, contains only a heated electron-emitting cathode and an anode. Electrons...
    88 KB (9,259 words) - 02:30, 23 December 2024
  • first high power radio transmitter in the world, Marconi hired Prof. John Ambrose Fleming, University College, London. The original twenty mast circular aerial...
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  • vacuum cleaner Michael Faraday (1791–1867), electric transformer John Ambrose Fleming (1848–1945), vacuum diode Tommy Flowers (1905–1998), Colossus computer...
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  • Thumbnail for X-ray
    and the restoration process was difficult to control. In 1904, John Ambrose Fleming invented the thermionic diode, the first kind of vacuum tube. This...
    106 KB (12,622 words) - 09:02, 26 December 2024
  • Thumbnail for Royal Institution Christmas Lectures
    William Henry Bragg The World of Sound 1920 John Arthur Thomson The Haunts of Life 1921 John Ambrose Fleming Electric Waves and Wireless Telephony 1922...
    42 KB (1,617 words) - 12:30, 22 December 2024
  • Thumbnail for Electrical impedance
    the lengths of the sides of a right angle triangle) developed by John Ambrose Fleming in 1889. Impedances could thus be added vectorially. Kennelly realised...
    32 KB (5,081 words) - 07:15, 15 December 2024
  • molecular sieve Alexander Fleming (1881–1955), Scotland – Penicillin John Ambrose Fleming (1848–1945), UK – Vacuum diode Sandford Fleming (1827–1915), Canada...
    107 KB (12,077 words) - 16:43, 7 December 2024
  • Thumbnail for Digital electronics
    operation was facilitated by the invention of the vacuum tube in 1904 by John Ambrose Fleming. At the same time that digital calculation replaced analog, purely...
    49 KB (6,189 words) - 01:36, 10 December 2024