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Topic: Edison effect

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Thermionic emission

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	edison
		It should also call to mind Thomas Alva Edison's illicit claim to the invention of the light bulb, and his general propensity for copying and appropriation as an emblem of the inherently uncertain authorship of all recorded works.
		Finally, it invokes a metaphorical allusion to the physical phenomenon known as the "Edison Effect" wherein atoms from a glowing filament are deposited on the inner surface of light bulbs causing them to darken.
		Edison's reputation had grown as an inventor of electrical miracles - but the talking machine was a simple mechanical contrivance which could have been built successfully several centuries earlier, in plenty of time to skyrocket Bach and Mozart to international stardom.
	www.well.com /~demarini/edison.html (1553 words)

	Thermionic emission - Wikipedia, the free encyclopedia
		Thermionic emission (archaically known as the Edison effect) is the flow of electrons from a metal or metal oxide surface, caused by thermal vibrational energy overcoming the electrostatic forces holding electrons to the surface.
		The effect was accidentally rediscovered by Thomas Edison on February 13, 1880, while trying to discover the reason for breakage of lamp filaments and uneven flening (darkest near one terminal of the filament) of the bulbs in his incandescent lamps.
		Edison saw no use for this effect, and although he patented it in 1883, he did not study it any further.
	en.wikipedia.org /wiki/Edison_Effect (689 words)

	Thomas Edison - Wikipedia, the free encyclopedia
		Thomas Edison was born in 1847 in Milan, Ohio to Samuel Ogden Edison II (1804-1896); and Nancy Matthews Elliott (1810-1871).
		Edison (or, reportedly, one of his employees) employed the tactics of misusing Tesla's patents to construct the first electric chair for the state of New York to promote the idea that AC was deadly.
		Thomas Edison was a freethinker, and was most likely a deist, claiming he did not believe in "the God of the theologians," but did not doubt that "there is a Supreme Intelligence." However, he rejected the idea of the supernatural, along with such ideas as the soul, immortality, and a personal God.
	en.wikipedia.org /wiki/Thomas_Edison (2959 words)

	The Lightbulb (Site not responding. Last check: 2007-10-17)
		Edison was born in Milan, Ohio, on February 11, 1847.
		Edison's crowning achievement in telegraphy was his invention of machines that made possible simultaneous transmission of several messages on one line and thus greatly increased the usefulness of existing telegraph lines.
		In 1878 Edison was appointed Chevalier of the Legion of Honor of France and in 1889 was made Commander of the Legion of Honor.
	www.bergen.org /ECEMS/class/light.htm (743 words)

	"In Search of the Heroes": The Thomas Edison Story
		Thomas Edison, the youngest of seven children, was born in Milan, Ohio, on February 11, 1847, to Samuel and Nancy Edison.
		Edison discovered that a valve could be created for an electronic current by inserting a metal plate within the filament of an electric light bulb.
		Edison, who had been working unsuccessfully on "talkies" by combining the phonograph and the camera, left the motion picture business when the industry started to turn away from the educational purpose he saw for it and towards entertainment.
	www.graceproducts.com /edison/life.html (1141 words)

	Learn more about Thomas Edison in the online encyclopedia. (Site not responding. Last check: 2007-10-17)
		Edison was one of the most prolific inventors of his time, holding a record 1,093 patents in his name from work done by his employees (and himself.) Edison received patents worldwide, including the United States, United Kingdom, France, and Germany.
		Thomas Edison began his career as an inventor in Newark, New Jersey, with the stockticker and improved telegraphic devices being invented there, but the invention which first gained Edison wide fame was the phonograph in 1877.
		For example, Edison did not invent the electric lightbulb, which was allegedly invented by Heinrich Goebel in 1854.
	www.onlineencyclopedia.org /t/th/thomas_edison.html (2276 words)

	SPECTRUM Biographies - Thomas Alva Edison
		Edison entered school in Port Huron, but his teachers considered him to be a dull student.
		Edison moved to New York City and within a year, he was able to open a workshop in Newark, New Jersey.
		Edison was a poor financial manager and by 1875, he began to experience financial difficulties.
	www.incwell.com /Biographies/Edison.html (730 words)

	Thomas Alva Edison (Site not responding. Last check: 2007-10-17)
		Edison was born in 1847, a year when Michael Faraday practically invented alternating current (passing a magnet through a coil of wire, he found, generated electricity).
		By 1869, Edison's inventions, including the duplex telegraph (which sent messages in opposite directions at the same time on the same wire) and the message printer, were progressing so well, he left telegraphy and began a career of full-time inventing and entrepreneurship.
		With this windfall, Edison was able to establish a laboratory in Menlo Park, New Jersey, and later in West Orange, where he continued to turn out a prodigious amount of work for the rest of his life in what would become a model of the modern industrial research laboratory.
	www.webstationone.com /fecha/edison.htm (1199 words)

	[No title]
		The year 1883 was significant for Edison in that, by his discovery of what was to become known as the "Edison effect," he pushed aside a veil of darkness behind which were to be found all the wonders of electronics.
		Edison in this achievement discovered the previously unknown phenomenon by which an independent wire or plate, when placed between the legs of the filament in an electric bulb, serves as a valve to control the flow of current.
		In that year, 1883, Edison filed a patent on an electrical indicator employing the "Edison effect," the first application in the field of electronics.
	www.charlesedisonfund.org /TomEdisonBio/ch10.html (178 words)

	[No title]
		This suggested to Edison and his people that in their lamps negatively charged carbon atoms were projected from the filament, and only those from the negative end could get to the glass.
		Edison had a paper on his discovery prepared and presented at this meeting by Professor E. Houston....This paper was published beginning on page 1 of Volume 1 of the Transactions of the American Institute of Electrical Engineers....In the text Professor Houston describes the experiment on current flow to a platinum plate in the lamp.
		Edison told people about it, he applied for a patent describing and making use of it, he caused it to be reported in the scientific literature, and it aroused a lively interest among eminent men of the day.
	home.frognet.net /~ejcov/edisone.html (2071 words)

	ipedia.com: Thomas Edison Article (Site not responding. Last check: 2007-10-17)
		Edison was considered one of the most prolific inventors of his time, holding a record 1,093 patents in his name.
		Edison did preside personally over several executions of animals, primarily stray cats and dogs, for the benefit of the press to prove that his system of direct current was safer than that of alternating current.
		Ironically, Edison was against capital punishment, but his desire to disparage the system of alternating current led to the invention of one of the world's most recognizable killing devices.
	www.ipedia.com /thomas_edison.html (2182 words)

	Edison Elementary - About Thomas Edison (Site not responding. Last check: 2007-10-17)
		One challenge that Edison failed at was the invention of an undersea telegraph.
		Edison was upset to discover that his new wife would not be his partner in his science laboratory.
		Edison had learned that teenagers were turning up the speed of his cylinder phonograph to make the music faster.
	www.minot.k12.nd.us /mps/edison/aboutte2.html (1887 words)

	No. 1323: Fleming's Electric Valve
		Edison refined the idea in 1883, while he was trying to improve his new incandescent lamp.
		The effect is this: in a vacuum, electrons flow from a heated element -- like an incandescent lamp filament -- to a cooler metal plate.
		Edison saw no special value in the effect, but he applied for a patent anyway.
	www.uh.edu /engines/epi1323.htm (520 words)

	Inventor of the Week: Archive
		Edison's first job (1859) was operating a newstand on the railroad that ran from Port Huron to Detroit.
		Edison installed the first reliable, durable electric lights in his own labs, and later built the first public power station, in Manhattan's financial district (1882).
		Edison inventions not mentioned above include: the printing telegraph, the electric "stencil pen," a magnetic mining process, an electrical torpedo, a synthetic rubber, and improved alkaline batteries, cement mixers, and microphones.
	web.mit.edu /invent/iow/edison.html (709 words)

	Inventor Thomas Alva Edison
		An account of the life of inventor Thomas Edison, focusing on his intellectual contributions, his absorption in his work, the mythology that developed and was cultivated about him, and the cultural context in which he produced his inventions.
		Thomas Edison eventually proved himself to be one of the most prolific inventors of practical electrical devices in history.
		Edison received his first patent, of the more than 1,000 patents, in 1868 for a vote counter intended to speed up proceedings in Congress.
	www.ideafinder.com /history/inventors/edison.htm (1595 words)

	Edison - Wikipedia, the free encyclopedia
		Edison Schools is the name of a company in the United States running public schools for profit:
		Edison is the name of some places in the United States of America.
		Edison is also a name of a 2005 film directed by David J. Burke.
	en.wikipedia.org /wiki/Edison (204 words)

	The miraculous quality of his inventions
		The cultural and social effects of electric lighting could be discussed for considerable periods of time, but the important part for this project is that the name Edison was emblazoned upon every early light bulb and the electric company itself.
		After Edison finished playing for a group of reporters his singing of "Mary Had a Little Lamb" on the phonograph, the world would never be the same.
		While Edison's amazing inventions likely could have made a public hero out of the drabbest of laboratory henchmen, the Wizard's ability to grab attention for his product and himself made him the resonant figure he is in American culture today.
	xroads.virginia.edu /~CLASS/am485_98/brady/Edison/miracle.html (1343 words)

	Edison Chen HK Chinese Pop Singer
		Edison Chen is often critised by his critics since Edison poorly pronounces cantonese words in his songs.
		Edison Chen recently starred in a film by Jiang Hu in which his character had to rape a dog as punishment.
		Edison Chen (陳冠希; pinyin: Chen G?anx?) (born October 7, 1980 in Vancouver, Canada) is a popular Hong Kong teen idol.
	www.compbuy.co.uk /EdisonChen.htm (642 words)

	Edison:Timeline for Inventing Entertainment:The Motion Pictures and Sound Recordings of the Edison Companies
		Edison develops tin foil cylinder phonograph; files patent for it on December 24 which is awarded on February 19, 1878.
		Edison and Dickson experiment to synchronize sound with film; the Kinetophone is invented which loosely synchronizes a Kinetoscope image with a cylinder phonograph.
		Edison negotiates in January with Raff and Gammon to manufacture the Phantoscope which Armat presents as his own invention; machine is renamed the Vitascope in February, and Edison's name put on it.
	memory.loc.gov /ammem/edhtml/edtime.html (1353 words)

	World Almanac for Kids
		EDISON, Thomas Alva (1847–1931), American inventor, whose development of a practical electric light bulb, electric generating system, sound-recording device, and motion picture projector had profound effects on the shaping of modern society.
		Edison was born in Milan, Ohio, on Feb. 11, 1847.
		In 1887 Edison moved his laboratory from Menlo Park, N.J., to West Orange, N.J., where he constructed a large laboratory for experimentation and research.
	www.worldalmanacforkids.com /explore/inventions/edison_thomas.html (768 words)

	De Forest Audion Tube- Paving the Way for Radio in 1906
		In experiments conducted in 1883 Edison noted that electric current would flow from the bulb filament to a positively charged metal plate inside the tube.
		The phenomena came to be called the "Edison Effect," and Edison patented it as a potential current measuring device, as the flow of current was proportional to the incandescence of the bulb.
		An Edison Co. employee named John Fleming conducted further experiments on the Edison effect until 1896, when he was diverted to other work.
	www.cedmagic.com /history/deforest-audion.html (381 words)

	Artifact #20
		In one attempt to test his theory Edison made a lamp first in normal two wire fashion, each filament end connected to a wire, but also placed a thin metal rod inside the lamp that was connected to a third electric wire.
		Edison's premise was to create a normal vacuum in the lamp, electrify it, and then attach the third wire to one of the two filament electric lead wires to see if the soot could be polarized and attracted to the metal rod instead of the glass.
		His Edison Effect experiment in 1883 turned out to be man's first use and control of what would later become known as the electron.
	www.edisonian.com /p012collart020eefl.htm (589 words)

	The First True Incandescent Light Bulb
		The more cynical among us may suggest that Edison was thrust into the limelight (see note below) because many among us learn their history through films, and the vast majority of early films were made in America by patriotic Americans.
		It is also probably fair to say that Edison did produce the first commercially viable light bulb.
		why this is of interest to us here is that Edison's experiments with light bulbs led him to discover the Edison Effect, which ultimately led to the invention of the vacuum tube.
	www.maxmon.com /1878ad.htm (400 words)

	IEEEVM: The Edison Effect
		His assistant noticed that the carbon seemed to be coming from the end of the filament that was attached to the power supply, and seemed to be flying through the vacuum onto the walls of the bulb.
		Edison determined that not only was carbon flying through the vacuum, but that it carried a charge.
		Years later, when he was elderly, the discovery of what became known as the “Edison Effect” was remembered, but because Edison had no idea what it was or how it worked, he is rarely given credit for this contribution to the development of electronics.
	www.ieee-virtual-museum.org /collection/tech.php?id=2345876&lid=1 (347 words)

	People
		Among these inventions are the electric lightbulb, the office duplicating machine, the record player, the movie camera and projector, and the Edison Effect (the basis of electronics).
		Edison was locked in a fierce battle with Nikola Tesla over which form of electricity would be dominant, Edison's direct current or Tesla's alternating current.
		Edison decided that for public relations purposes he would back the bill on death by electrocution proposed.
	aboutfacts.net /People7.htm (498 words)

	No. 23: The Vacuum Tube
		he "Edison effect" was the name given to a phenomenon that Edison observed in 1875 and refined later, in 1883, while he was trying to improve his new incandescent lamp.
		Edison saw no special value in the effect, but he patented it anyway.
		In 1904, the Edison effect was finally put to use, but not in a light bulb.
	www.uh.edu /engines/epi23.htm (426 words)

	Note: Thomas Edison (Site not responding. Last check: 2007-10-17)
		Edison patented this discovery, which he modestly named "The Edison Effect." The object he's holding in the image at right is the "Edison Effect Tube," in fact.
		Today it's DeForrest and not Tom Edison who's known as "The Father of Radio." This must certainly have galled Edison, who was not only a prolific inventor, but one of the most driven men of his era.
		Of course, Edison had lots of other inventions to his credit (the light bulb, the phonograph, and motion pictures, to name a few; his is still the all-time record of patents issued to an indivdual, a total of 1093) and he certainly hasn't been ignored by history.
	education.vetmed.vt.edu /Curriculum/VM8054/Labs/Lab2/Notes/edison.htm (438 words)

	Chronology: 1879—1931 - The Edison Papers
		The chronology of Edison's first three decades is fuller than that for the rest of his life because the editors have researched those years in more detail, as reflected in the volumes of the book edition.
		Edison's ore separator is used by the Edison Ore Milling Company to separate iron ore from fl sand at Quonocontaug, Rhode Island.
		Edison's eldest son, Thomas A. Edison, Jr., and Marie Louise Toohey are married in the Roman Catholic Church, two days after announcing that they had secretly married in November.
	edison.rutgers.edu /chron2.htm (4879 words)

	Thomas Alva Edison
		Thomas Alva Edison is one of the most famous American inventors.
		He realized, however, that this was impractical and that the weight of the motor that was needed to lift a craft into the air vertically with the current state of the technology was too great to allow for flight.
		Among Edison's other inventions were the phonograph, flexible celluloid film and his invention of the movie projector, which aided the development of the motion picture industry, the alkaline storage battery, a magnetic process to separate iron ore, and the carbon microphone.
	www.centennialofflight.gov /essay/Dictionary/edison/DI22.htm (422 words)

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