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283:. By fall its output had been improved to 500 watts and 75 kHz. On Christmas Eve, 1906, Fessenden made an experimental broadcast of Christmas music, including him playing the violin, that was heard by Navy ships and shore stations down the East Coast as far as Arlington. This is considered the first AM radio entertainment broadcast.
33:
342:
Alexanderson retired from
General Electric in 1948. The inventor and engineer remained active to an advanced age. He continued television research as a consultant for the Radio Corporation of America filing his 321st patent application in 1955. Over his lifetime, Alexanderson received 345 US patents,
274:
transmitter. Designing a machine that would rotate fast enough to produce radio waves proved a formidable challenge. Alexanderson's family were convinced the huge spinning rotors would fly apart and kill him, and he set up a sandbagged bunker from which to test them. In the summer of 1906 Mr.
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The change in the focus of the patent system, from the protection of the inventor to the protection of the corporation which either employed the inventor or purchased his patents, was succinctly phrased by E.F.W. Alexanderson, a
Swedish immigrant who became one of GE's early leading research
266:, then working for the US Weather Bureau, for a specialized alternator with much higher frequency than others in existence at that time, for use as a radio transmitter. Fessenden had been working on the problem of transmitting sound by
372:
In 1923, Alexanderson's son, Verner, was kidnapped. Alexanderson broadcast an appeal for help on the radio. The child was located after three days and returned to his family. The kidnappers were later caught.
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engineers. "The patent system was established, I believe", he said, "to protect the lone inventor. In this it has not succeeded ... the patent system protects the institutions which favor invention".
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Alexanderson is also mentioned in connection with the emergence of the patent system, that he was partially critical to. As the technology historian David Noble writes:
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commercial and Naval wireless stations to transmit radiotelegraphy traffic at intercontinental distances, until by the 1930s it was replaced by
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Ernst
Fredrik Werner Alexanderson – en personcentrerad skildring av elektroteknikens utveckling under 1900-talets första hälft.
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335:. In 1930, he conducted an early public demonstration of his large screen television system on a closed-circuit channel at
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Alexanderson continued improving his machine, and the
Alexanderson alternator became widely used in high power
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The following year he developed the coordination of sound and movement on the first television drama,
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Brittain, J. E. (July 2004). "Electrical
Engineering Hall of Fame: Ernst F. W. Alexanderson".
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for only a short time when GE received an order from
Canadian-born professor and researcher
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1200:– their technologies and transatlantic experiments compared. Accessed April 10, 2006
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321:. The first television broadcast in the United States was received in 1927 at his
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Bibliography related to
Alexanderson's contribution to history of television
1065:
America by Design: Science, Technology, and the Rise of
Corporate Capitalism
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transmitters. The only surviving transmitter in a working state is at the
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270:, and had concluded that a new type of radio transmitter was needed, a
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the last filed in 1968 at age 89. He died in 1975 and was buried at
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502:(directional antenna), filed November 1927, issued September 1930
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long distance radio transmission. Alexanderson also created the
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89:
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The Boy Genius and the Mogul The Untold Story of
Television
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386:
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alternator, was installed in
Fessenden's radio station in
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from the American Institute of Electrical Engineers, now
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Alexanderson was also instrumental in the development of
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1106:
Alexanderson: Pioneer in American Electrical Engineering
778:"Initial Public Exhibit Gives New Impetus to Television"
931:
919:. Engineering and Technology History. January 31, 2010
1177:
at prof. Eugenii Katz website accessed April 10, 2006
707:
Barry Mishkind (Oldradio.com) accessed April 10, 2006
510:
899:"Dr. Ernst Alexanderson, Radio Pioneer, Dies at 97"
231:in 1902 and spent much of his life working for the
684:"Fessenden and the Early History of Radio Science"
661:"Ernest Frederick Werner Alexanderson (1878–1975)"
1118:Fisher, David E. and Marshall J. Fisher (1996)
1046:Farsta : Televerket. Bengt V Nilsson. 1987.
1034:at IEEE History Center accessed February 18, 2015
639:"Men Who Have Made Radio – E. F. W. Alexanderson"
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490:suppressor), filed June 1926; issued August 1929
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681:
1092:Electric City: General Electric in Schenectady
637:Cafe, Kirt Blattenberger RF (September 1930).
1516:
1423:
1228:
1145:(Proceedings of the I.R.E., pp. 263–285)
437:Ernst was very active and got a total of 345
187:, a direct current amplifier used during the
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965:List of recipients of the IEEE Edison Medal
866:The Columbia History of American Television
385:from the Institute of Radio Engineers, now
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705:"Dr. Ernst Alexanderson, Pioneer Inventor"
611:
474:, filed October 1913; issued February 1916
458:), filed April 1909; issued, November 1911
31:
869:. Columbia University Press. p. 36.
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720:. Cherished Television UK. Archived from
663:. Famous Scientist Blog. January 31, 2010
1660:KTH Royal Institute of Technology alumni
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718:"Dr Ernst Frederick Werner Alexanderson"
686:. The Radioscientist – volume 5 number 3
156:(January 25, 1878 – May 14, 1975) was a
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1715:Knights of the Order of the Polar Star
1680:Swedish emigrants to the United States
1675:Valdemar Poulsen Gold Medal recipients
1617:
835:. Oxford University Press. p. 5.
804:"Alexanderson wins royal Danish medal"
622:(in Swedish). Vol. 1. Stockholm:
553:"IRE Medal of Honor Winners 1917–1963"
367:
1720:American telecommunications engineers
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917:"Ernst F. W. Alexanderson, Biography"
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1139:Alexanderson, E.F.W. (August 1920)
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407:Danish Academy of Technical Sciences
191:for controlling anti-aircraft guns.
179:used between 1906 and the 1930s for
16:Swedish-American electrical engineer
242:
154:Ernst Frederick Werner Alexanderson
13:
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682:John S. Belrose (September 1994).
578:The New York Times Current History
275:Alexanderson's first effort, a 50
207:(1896–97) and was educated at the
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1655:People from Schenectady, New York
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1142:Trans-oceanic Radio Communication
1120:Tube, the Invention of Television
1108:(Johns Hopkins University Press)
1094:(Texas A&M University Press)
426:Consumer Electronics Hall of Fame
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1090:Blackwelder, Julia Kirk (2014)
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1022:citation accessed April 10, 2006
1012:National Inventor's Hall of Fame
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1710:Engineers from New York (state)
1700:20th-century American inventors
1695:20th-century American engineers
1122:(Counterpoint, Washington D.C)
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829:Richards, Rashna Wadia (2021).
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950:Carl Johnson (June 12, 2013).
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534:Tuned radio frequency receiver
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897:Krebs, Albin (May 15, 1975).
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209:Royal Institute of Technology
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171:development. He invented the
1670:IEEE Edison Medal recipients
1640:Swedish electrical engineers
237:Radio Corporation of America
7:
1532:Valdemar Poulsen Gold Medal
1104:Brittain, James E. (1992)
1067:. Oxford University Press.
624:National Archives of Sweden
619:Svenskt biografiskt lexikon
555:. IEEE History Center. 2011
506:
403:Valdemar Poulsen Gold Medal
10:
1736:
1196:December 28, 2012, at the
1185:Histoire de la télévision"
743:Stashower, Daniel (2002).
612:Westerberg, H. E. (1918).
591:"Ernst F. W. Alexanderson"
432:
247:Alexanderson designed the
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990:10.1109/JPROC.2004.828999
452:High frequency alternator
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281:Brant Rock, Massachusetts
199:Alexanderson was born in
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1063:Noble, David F. (1977).
614:"Ernst F W Alexanderson"
593:. Soylent Communications
1173:April 26, 2006, at the
978:Proceedings of the IEEE
863:Edgerton, Gary (2007).
468:Selective Tuning System
325:home at 1132 Adams Rd,
249:Alexanderson alternator
173:Alexanderson alternator
163:, who was a pioneer in
37:Alexanderson circa 1920
1561:Edward Victor Appleton
1336:George Ashley Campbell
1018:March 4, 2016, at the
984:(7). IEEE: 1216–1219.
952:"The Return of Verner"
749:. Crown. p. 128.
574:"The March of Science"
500:Radio signaling system
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296:Grimeton radio station
227:. He emigrated to the
142:Electrical engineering
119:Valdemar Poulsen Medal
1635:Electronics engineers
1567:Balthasar van der Pol
1294:Arthur Edwin Kennelly
1191:Fessenden and Marconi
1168:Illustrated biography
580:, May 1920, page 266.
495:U.S. patent 1,775,801
479:U.S. patent 1,723,908
463:U.S. patent 1,173,079
447:U.S. patent 1,008,577
360:
332:The Queen's Messenger
217:Technische Hochschule
75:Schenectady, New York
1591:Jay Wright Forrester
1164:at Wikimedia Commons
203:. He studied at the
1650:Television pioneers
1579:Charles P. Ginsburg
1439:IEEE Medal of Honor
1258:William D. Coolidge
810:. November 23, 1946
724:on December 8, 2015
383:IEEE Medal of Honor
368:Kidnapping incident
312:World Heritage Site
161:electrical engineer
103:IEEE Medal of Honor
1555:Ernst Alexanderson
1549:Robert Watson-Watt
1471:Reginald Fessenden
1459:Ernst Alexanderson
1453:Edwin H. Armstrong
1360:Ernst Alexanderson
1348:Edwin H. Armstrong
1306:Lewis B. Stillwell
1204:Ernst Alexanderson
1162:Ernst Alexanderson
903:The New York Times
288:very low frequency
264:Reginald Fessenden
205:University of Lund
25:Ernst Alexanderson
1690:Swedish engineers
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1465:Guglielmo Marconi
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1390:Karl B. McEachron
1342:John B. Whitehead
1324:Dugald C. Jackson
1300:Willis R. Whitney
1288:Bancroft Gherardi
1244:IEEE Edison Medal
1160:Media related to
1074:978-0-19-502618-4
940:, pp. 87–88.
842:978-0-19-007128-8
808:The Daily Gazette
782:The Daily Gazette
393:IEEE Edison Medal
327:Schenectady, N.Y.
256:radio transmitter
177:radio transmitter
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111:IEEE Edison Medal
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349:Schenectady
292:vacuum tube
268:radio waves
251:, an early
175:, an early
86:Nationality
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1619:Categories
1597:J. B. Gunn
938:Noble 1977
540:References
319:television
195:Background
169:television
49:1878-01-25
1446:1917–1925
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1251:1926–1950
1032:Biography
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181:longwave
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439:patents
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90:Swedish
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304:Sweden
221:Berlin
138:Fields
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106:(1919)
96:Awards
994:S2CID
454:(100
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165:radio
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397:IEEE
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