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Topic: John Ambrose Fleming

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Thermionic valve

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Edison effect

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	Sir John Ambrose Fleming (Site not responding. Last check: 2007-10-27)
		Fleming recognized that the major problem preventing vast improvements being made was that of detecting the signals themselves.
		Fleming's invention was the ancestor of the triode and other multielectrode vacuum tubes.
		Fleming lost a patent infringement case regarding the thermionic technology in the courts.
	www.ce.org /Events/Awards/435.htm (505 words)

	John Ambrose Fleming - Wikipedia, the free encyclopedia
		He was born John Ambrose Fleming on November 29, 1849 to James and Mary Anne Fleming at Lancaster, Lancashire and baptised on February 11, 1850.
		Fleming was born in Lancaster and educated at the University College School, London, and the University College London.
		Fleming's diode was a vital unit in radio receivers and radars for many decades afterwards, until solid-state electronic technology took over.
	en.wikipedia.org /wiki/John_Ambrose_Fleming (410 words)

	Smart Computing Encyclopedia Entry - Sir John Ambrose Fleming (Site not responding. Last check: 2007-10-27)
		Sir John Ambrose Fleming is credited in 1904 with inventing the first valve, otherwise known as the thermionic valve or the Fleming valve.
		On Nov. 29, 1849, Fleming was born in Lancaster, Lancashire, England.
		Fleming also did a lot of research in the fields of electromagnetism, attempting to take Michael Faraday’s research on induction and magnetic lines a step farther.
	www.smartcomputing.com /editorial/dictionary/detail.asp?guid=&searchtype=1&DicID=19025&RefType=Encyclopedia (343 words)

	BookRags: John Ambrose Fleming Biography
		Fleming played an important role in the development of lighting, heating, and radio, and, as a consultant in private industry, was a proponent of their widespread conventional use.
		Fleming's most wide-ranging practical contribution to the field of electrical engineering was the development of the thermionic (or radio) valve, which acts as a rectifier for high frequency currency, permitting the current to flow in only one direction.
		Born in Lancaster, England, on November 29, 1849, Fleming was the eldest of seven children born to James Fleming, a minister, and the daughter of John Bazley White, a pioneer in the manufacturing of portland cement.
	www.bookrags.com /biography/john-ambrose-fleming-wop (1659 words)

	BookRags: John Ambrose Fleming Biography
		John Ambrose Fleming was the common thread that linked the work of three individual geniuses, yet every one of those three now overshadow him.
		Fleming, born on November 29, 1849, in Lancaster, England, was the son of a Congregational minister.
		Fleming named his invention the thermionic valve, the ancestor of all electronic tubes, because it controlled the flow of electricity just as a valve controls the flow of water.
	www.bookrags.com /biography/john-ambrose-fleming-woi (589 words)

	Radio-Electronics.Com :: John Ambrose Fleming - the founder of electronics?
		John Ambrose Fleming was born on 29th November 1849, the eldest of seven children born to a Congregational minister.
		Fleming recognised that the major problem preventing vast improvements being made was that of detecting the signals themselves.
		Fleming devoted his mind to this, and in his quest to make improvements he tried a large number of new ideas many new ideas to bring the required improvements.
	www.radio-electronics.com /info/radio_history/gtnames/fleming.php (1539 words)

	Fleming's left hand rule - Wikipedia, the free encyclopedia
		Fleming's left hand rule (for electric motors) shows the direction of the thrust on a conductor carrying a current in a magnetic field.
		The left hand is held with the thumb, first finger and second finger mutually at right angles.
		Both mnemonics are named after British engineer John Ambrose Fleming who invented them.
	en.wikipedia.org /wiki/Fleming's_left_hand_rule (182 words)

	IEC - Techline > Fleming, John Ambrose
		In 1881, when electric lighting began to attract public attention, John Ambrose Fleming was appointed electrician to the Edison Electric Light Company of London, a position which he occupied for the ensuing 10 years.
		In 1885 Fleming was appointed as the first professor of electrical engineering at University College, London, he subsequently held this position for more than 40 years.
		Fleming continued to investigate the effect, saying that the “discoloration of the glass was generally accepted as a matter of course.
	www.iec.ch /cgi-bin/tl_to_htm.pl?section=person&item=58 (470 words)

	Adventures in CyberSound: Fleming, John Ambrose
		Fleming was english engineer who made numerous contributions to electronics, photometry, electric measurements, and wireless telegraphy.
		John Ambrose, the son of the Rev. James Fleming, b: November 29, 1849 d: April 19, 1945 Lancaster, England, Sidmouth, England completed his schooling at University College School, London, to which city his parents moved from Lancaster.
		Fleming's appointment in 1899 as electrical adviser to the Marconi Wireless Telegraph Company thoroughly acquainted him with the capricious coherer as a detector of wireless waves.
	www.acmi.net.au /AIC/FLEMING_BIO.html (1965 words)

	Mag Lab Education - Pioneers in Electricity and Magnetism: Alphabetical Index
		John Bardeen (1908-1991) – John Bardeen was one of a handful of individuals awarded the Nobel Prize twice and the first scientist to win dual awards in physics.
		John Robert Schrieffer (1931-Present) – While still in graduate school, John Robert Schrieffer developed with John Bardeen and Leon Cooper a theoretical explanation of superconductivity that garnered the trio the Nobel Prize in Physics in 1972.
		Joseph John Thomson (1856-1940) – Joseph John Thomson, better known as J. Thomson, was a British physicist who first theorized and offered experimental evidence that the atom was a divisible entity rather than the basic unit of matter, as was widely believed at the time.
	www.magnet.fsu.edu /education/tutorials/pioneers (5135 words)

	Mag Lab Education - Pioneers in Electricity and Magnetism: John Ambrose Fleming
		Fleming patented the valve, which functioned as both a detector and a rectifier, in 1904: This is often considered the birth of electronics.
		Fleming himself was involved in the budding television industry late in his life, serving as president of the Television Society of London.
		Fleming was also active with the Physical Society of London, presenting the group’s inaugural address in 1874 and his final address in 1939, when he was 90 years old.
	www.magnet.fsu.edu /education/tutorials/pioneers/fleming.html (978 words)

	Fleming
		Fleming, in fact, however, showed early signs of prodigy and delivered his first lecture on electromagnetic phenomena at the age of thirteen.
		Fleming, however, was a very busy man and also perhaps one who did not always see the immediate applications of the things on which he had worked.
		Fleming was the author of more than a hundred scientific papers and books, including the influential "The Alternate Current Transformer" (1889, 1892), "The Principles of Electric Wave Telegraphy" (1906), "The Propagation of Electric Currents in Telephone and Telegraph Conductors" (1911) and "Memoirs of a Scientific Life" (1934).
	chem.ch.huji.ac.il /~eugeniik/history/fleming.htm (3286 words)

	Fathom :: The Source for Online Learning
		The tale of the inventions of John Ambrose Fleming is sad.
		Fleming's valve was the first of a line of devices which were to be the mainstay of electronics for its first half of the twentieth century and well into the 'solid-state' era, when transistors and integrated circuits inspired the miniaturisation which we now expect.
		Fleming was already aware of de Forest's activities and had disputed the American's claims to originality through a sometimes acrimonious correspondence with him in the technical press in 1906.
	www.fathom.com /feature/122133 (809 words)

	Yes90 tviNews S90 109 Ambros or John Ambrose Fleming of the "Smart Daaf Boys" The inventors that put the ...
		Ambrose Fleming is the Inventor of the The Thermionic valve.
		He was born John Ambrose Fleming on November 29, 1849 to James and Mary Anne Fleming at Lancaster, Lancashire and baptised on February 11, 1850.
		Fleming devoted his mind to this, and in his quest to make improvements he tried a large number of new ideas to bring the required improvements.
	www.smart90.com /ambrosefleming (3472 words)

	No. 1323: Fleming's Electric Valve
		Radio was in its infancy, and the English scientist John Ambrose Fleming was working for the British "Wireless Telegraphy" Company.
		Fleming faced the problem of converting a weak alternating current into a direct current that could actuate a meter or a telephone receiver.
		Fleming realized that an Edison effect lamp would convert alternating current to a direct current because it let the electricity flow only one way.
	www.uh.edu /engines/epi1323.htm (520 words)

	Highbeam Encyclopedia - Search Results for Fleming,
		Fleming, Sir Alexander FLEMING, SIR ALEXANDER [Fleming, Sir Alexander] 1881-1955, Scottish bacteriologist, discoverer of penicillin (1928) and lysozyme (1922), an antibacterial substance found in saliva and other body secretions.
		Fleming, Walter Lynwood FLEMING, WALTER LYNWOOD [Fleming, Walter Lynwood] 1874-1932, American historian, b.
		San Jose, Calif. She began skating at age 9, and after distinguished accomplishments as a juvenile and novice skater, she was U.S. Ladies Champion from 1964 to 1968, Olympic champion in 1968, and World Champion in 1966, 1967, and 1968.
	www.encyclopedia.com /SearchResults.aspx?Q=Fleming, (533 words)

	Fleming, John Ambrose (Site not responding. Last check: 2007-10-27)
		Fleming was born in Lancaster, Lancashire, and educated at University College and South Kensington, London, and at Cambridge, where he worked in the Cavendish Laboratory and studied under Scottish physicist James Clerk Maxwell.
		In 1882-83, Fleming was professor at Nottingham, and from 1885 at University College, London.
		He was a consultant at various times to the Edison, Swan, and Ferranti electric-lighting companies and the Marconi Wireless Telegraph Company, for which he designed many parts of their early radio apparatus.
	cartage.org.lb /en/themes/Biographies/MainBiographies/F/FlemingJ/1.html (195 words)

	Fleming, Sir John Ambrose - HighBeam Encyclopedia (Site not responding. Last check: 2007-10-27)
		FLEMING, SIR JOHN AMBROSE [Fleming, Sir John Ambrose] 1849-1945, English electrical engineer.
		He was a leader in the development of electric lighting, the telephone, and wireless telegraphy in England and the inventor of a thermionic valve (the first electron tube).
		Michael Anthony Fleming and ultramontanism in Irish-Newfoundland Roman Catholicism, 1829-1850.
	www.encyclopedia.com /html/f/flemingj1.asp (207 words)

	Connected Earth: Fleming, Sir John Ambrose (1849-1945) : kicking-off the great electronics race
		Although not one of the 'greats' of invention, John Fleming's creation of the thermionic valve (or vacuum tube) helped kick-start modern electronics.
		Fleming realised that radio development was being held up by the under-performing detection of radio signals.
		Nevertheless, Fleming's valve paved the way for all subsequent development and in 1929 he was knighted for his contribution to electrical and electronic engineering.
	www.connected-earth.com /Galleries/Pioneersandpersonalities/F/Flemming/index.htm (183 words)

	BIOGRAFÍA DE SIR JOHN AMBROSE FLEMING
		Su padre, el reverendo James Fleming, hombre de pocos recursos económicos, tuvo que enfrentar muchas dificultades para poder educar a su hijo.
		John Ambrose pronto demostró ser un joven brillante, al impartir su primera conferencia de electromagnetismo a los 13 años.
		Fue precisamente Fleming quien descubriría, pocos años después, la explicación científica y la aplicación práctica a lo que hoy conocemos como "Efecto Edison".
	www.asifunciona.com /biografias/fleming_j_a/fleming_j_a.htm (584 words)

	Greatest Achievements - 8. Computers
		Sir John Ambrose Fleming invents the vacuum tube and diode.
		John Von Neumann, working independently of Turing, writes a document describing the stored-program computer, the basis for the computer industry.
		John Bardeen, Walter H. Brattain, and William B. Shockley of Bell Telephone Laboratories invent the transistor.
	www.nationalacademies.org /greatachievements/ga_8_3.html (387 words)

	Fleming Sir John Ambrose - Search Results - MSN Encarta (Site not responding. Last check: 2007-10-27)
		Fleming, Sir John Ambrose (1849-1945), English physicist and engineer, the inventor of the first electronic tube used to detect radio waves....
		Another version of Fleming's rule, the right-hand rule, can be used to decide in which direction the current will flow in a wire that is being moved...
		During the following decade, much experimentation was conducted with the sending of wireless signals.
	uk.encarta.msn.com /Fleming_Sir_John_Ambrose.html (121 words)

	Fleming Valve (Site not responding. Last check: 2007-10-27)
		The Fleming Valve is a diode that was used as a radio signal detector in the earliest days of radio communication.
		In 1899, John Ambrose Fleming, who worked for the British Marconi Company, was seeking a more sensitive detector for wireless reception, and he tried the Edison Effect bulb for this purpose, and found that it worked well.
		The litigation wars that erupted over this device, and DeForest's modification to it (the addition of the grid) lasted for decades, and were not finally settled until 1943.
	uv201.com /Tube_Pages/fleming_valve.htm (422 words)

	Electronics Industry Turns 100 Today \| LiveScience
		Many scientists and engineers consider the birth of electronics to be Nov. 16, 1904, when John Ambrose Fleming applied for a British patent for his invention: the thermionic diode.
		At a meeting of the AVS Science and Technology Society this week, one session will be devoted to celebrating Fleming's seminal invention and the plethora of electronics it spawned.
		Fleming called his device an oscillation valve, but it has also been referred to as a thermionic valve, vacuum diode, and a Fleming valve.
	www.livescience.com /technology/041116_electronics_anniversary.html (671 words)

	Sir John Ambrose Fleming — FactMonster.com
		Fleming, Sir John Ambrose, 1849–1945, English electrical engineer.
		He was a leader in the development of electric lighting, the telephone, and wireless telegraphy in England and the inventor of a thermionic valve (the first electron tube).
		Fleming was a professor at the Univ. of London and at University College and was knighted in 1929.
	www.factmonster.com /ce6/people/A0818905.html (80 words)

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