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Edwin Howard Armstrong was an American radio-frequency engineer and inventor who developed FM radio and the superheterodyne receiver system.
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science · American radio-frequency engineer and inventor (1890–1954) · electrical engineer · inventor · physicist · also Edwin Howard Armstrong, Edwin Armstrong, Edward Howard Amstrong, Armstrong
Born 18 December 1890 · Died 1 February 1954 · Q333987
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Anyone who has had actual contact with the making of the inventions that built the radio art knows that these inventions have been the product of experiment and work based on physical reasoning, rather than on the mathematicians' calculations and formulae. Precisely the opposite impression is obtained from many of our present day text books and publications.
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Published “Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults: An Update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging” in Journal of the American Society of Echocardiography — cited 11,872 times.
Armstrong's regenerative feedback circuit and superheterodyne and FM circuits were inducted into the TECnology Hall of Fame, an honor given to "products and innovations that have had an enduring impact on the development
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"in recognition of his contributions and pioneering spirit that have laid the foundation for consumer electronics
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In a series commemorating American Inventors
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Awarded National Inventors Hall of Fame (1980).
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Armstrong was inducted into the National Inventors Hall of Fame, and appeared on a U
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Marion Armstrong founded the Armstrong Memorial Research Foundation, and participated in its work until her death in 1979 at the age of 81
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Died 1954-02-01.
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“Anyone who has had actual contact with the making of the inventions that built the radio art knows that these inventions have been the product of experiment and work based on physical reasoning, rather than on the mathematicians' calculations and formulae. Precisely the opposite impression is obtained from many of our present day text books and publications.”
“The world, I think, will wait a long time for Nikola Tesla's equal in achievement and imagination.”
“Men substitute words for reality and then argue about the words.”
Armstrong told Marion that he had used up almost all his financial resources
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Awarded Washington Award (1951).
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At which time any low band transmitters were shut down, making obsolete 395,000 receivers that had already been purchased by the public for the original band
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Armstrong filed suit against RCA and the National Broadcasting Company, accusing them of patent infringement and that they had "deliberately set out to oppose and impair the value" of his invention, for which he requeste
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Awarded John Scott Award (1942).
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Won Edison Medal (1942).
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Won Franklin Medal (1941).
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Won Holley Medal (1940).
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RCA offered Armstrong $1,000,000 for a non-exclusive, royalty-free license to use his FM patents
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It introduced what became known as the Apex band, consisting of 75 broadcasting frequencies from 41
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Published a landmark paper in the Proceedings of the IRE that documented the superior capabilities of using wide-band FM
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Presented his new system to RCA president Sarnoff
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The RCA engineers constructed a successful FM shortwave link transmitting the Schmeling–Stribling fight broadcast from California to Hawaii, and noted at the time that the signals seemed to be less affected by static
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And 1934, he was unsuccessful in overturning the decision
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That court ruled that it was de Forest who should be considered regeneration's inventor
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Combining his love for high places with courtship rituals, Armstrong climbed the WJZ (now WABC) antenna located atop a 20-story building in New York City, where he reportedly did a handstand, and when a witness asked him
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Armstrong sold his super-regeneration patent to RCA for $200,000 plus 60,000 shares of corporation stock, which was later increased to 80,000 shares in payment for consulting services
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John Renshaw Carson of AT&T, inventor of Single-sideband modulation (SSB), had published a detailed mathematical analysis which showed that FM transmissions did not provide any improvement over AM
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The Westinghouse Electric & Manufacturing Company took out an option for $335,000 for the commercial rights for both the regenerative and superheterodyne patents, with an additional $200,000 to be paid if Armstrong preva
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And 1921 between RCA, Westinghouse and AT&T meant that Armstrong could freely use the Lévy patent
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Armstrong filed an application for a US patent of the superheterodyne circuit which was issued the next year
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When Armstrong sued de Forest's company in district court, alleging infringement of patent 1,113,149
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Won IEEE Medal of Honor (1917).
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And 1918 that covered some of the same basic ideas used in Armstrong's superheterodyne receiver
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De Forest filed a series of competing patent applications that largely copied Armstrong's claims, now stating that he had discovered regeneration first, based on a notebook entry made on August 6, 1912, while working for
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Earning an electrical engineering degree
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About the corporation offering superheterodynes as a superior offering to the general public
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Armstrong prepared a series of comprehensive demonstrations and papers that carefully documented his research, and in late 1913 applied for patent protection covering the regenerative circuit
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Armstrong enrolled at Columbia University in New York City, where he became a member of the Epsilon Chapter of the Theta Xi engineering fraternity, and studied under Professor Michael Pupin at the Hartley Laboratories, a
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The Armstrong family moved from their brownstone row house at 347 West 29th Street to a similar house at 26 West 97th Street on the Upper West Side
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In Chelsea, New York City, the eldest of three children of John Armstrong and Emily Smith
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Born 1890-12-18.
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