Inventor Name
Hammond, John Hays
Repository
Library of Congress
Manuscript Division
101 Independence Ave., SE
Washington, DC 20540-4680
202-707-5387
www.loc.gov
Physical Description
7 linear feet
Summary
Correspondence, notebooks, sketches, technical papers, legal briefs, printed matter, chronologies, and annotated photos, chiefly 1912-1953. Subjects include Hammond's basic experiments in radio control, intermediate frequency, frequency modulation, the triode electron tube, and the Elmer A. Sperry dispute on inertial guidance patents. Correspondents include Ernst F. W. Alexanderson, Alexander Graham Bell, Lee De Forest, Irving Langmuir, and Nikola Tesla.