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Chaffee, Emory Leon, 1885-1975.
Oral history interview with Emory Leon Chaffee, 1964 January 31.
Graduate study at Harvard University; greatest influence was Wallace C. Sabine; Ph.D. on e/m as a function of accelerating voltage supervised by Harry Moss, 1907; as corollary he developed the "Chaffee quenched gap" for producing continuous oscillations. Work on oxide filament in thermionic vacuum tubes, 1910; the Chaffee Gap used in wireless telegraphy experiments, 1911; mercury arc work with Pierce resulting in mercury vapor detector. World War I: torpedo detectors, double modulation, warbling the spectrum by rotating condenser, super-heterodyne; travels to France and Italy to demonstrate his transmitter. Starts first vacuum tube course in U.S. at Harvard, 1920; work on regeneration in coupled circuits, 1924; elaborate equivalent circuits, 1929; works on electronic response of retina with Bovie (first application of vacuum tubes to biophysics; continued some work of Einthoven), 1920s. In 1930s, works on stimulation of autonomic responses in a monkey's brain (R. U. Light), and power tubes and non-linear systems; becomes chairman of Power Tubes Committee of the Institute of Radio Engineers. Also a short discussion of the invention of crystal oscillators by Cady, Pierce, and Arnold.
Cady, Walter G. (Walter Guyton), 1874-1974
Chaffee, Emory Leon, 1885-1975.
Light, R. U.
Moss, Harry.
Sabine, Wallace Clement.
Harvard University.
Institute of Radio Engineers Power Tubes Committee.
Anti-submarine warfare -- Research.
Condensers (Vapors and gases) -- Experiments.
Detectors -- Research.
Electrons -- Research.
Gas-detectors -- Research.
Mercury arc -- Research.
Modulators (Electronics) -- Research.
Oscillators, Crystal.
Physics -- Instrumentation.
Telegraph, Wireless.
Telegraph, Wireless -- Experiments.
Vacuum-tubes -- Study and teaching.
World War, 1914-1918 -- War work.
Oral histories. aat
Interviews. aat
Sound recordings lcgft
Transcripts. aat
Hunt, Frederick V. interviewer.
American Institute of Physics. Niels Bohr Library & Archives. One Physics Ellipse, College Park, MD 20740, USA