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Taliesin Associated Architects architectural drawings and records, 1959-1991
400 linear feetEdwin H. Armstrong papers, 1886-1982, bulk 1912-1954
295.7 linear feetProfessional and personal files including Armstrong's correspondence with professional associations, other engineers, and friends, his research notes, circuit diagrams, lectures, articles, legal papers, and other related materials. Of his many inventions and developments, the most important are: 1) the regenerative or feedback circuit, 1912, the first amplified radio reception, 2) the superheterodyne circuit, 1918, the basis of modern radio and radar, 3) superregeneration, 1922, a very simple, high-power receiver now used in emergency mobile service, and 4) frequency modulation - FM, 1933, static-free radio reception of high fidelity. More than half the files concern his many lawsuits, primarily with Radio Corporation of America, over infringement of the Armstrong patents. Litigation continued until 1967. Other files deal with his work in the Marcellus Hartley Research Laboratory at Columbia University, 1913-1935, and with the American Expeditionary Forces in France during World War I, his Air Force contracts for communications development, Army research during World War II, the Radio Club of America, the Institute of Radio Engineers, FM development at his radio station at Alpine, N.J., the use of FM in television, his involvement in Federal Communications Commission hearings and legislation, and his work with the Zenith Radio Corporation. Also, letters to H.J. Round
Data Lists, Equipment Specifications and Service Test Reports, 1945 Box 120, Folder 17
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- Data Lists, Equipment Specifications and Service Test Reports, 1945
Roger Halle papers and architectural drawings, 1943-1992
11 document boxesGuidelines For Concrete Construction System, 1974 to 1976 Box 11, Folder 17
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- 8 copies of the guidelines, correspondence and testing report from McKee Berger Manueto, Inc.
- Abstract Or Scope
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8 copies of the guidelines, correspondence and testing report from McKee Berger Manueto, Inc.