Hammond, John Hays, 1888-1965

Inventor and scientist.

From the description of John Hays Hammond papers, 1908-1965 (bulk 1912-1953). (Unknown). WorldCat record id: 79449289

Inventor; B.S., Sheffield Scientific School, Yale, 1910; pioneer in systems radio control of moving objects (torpedoes, ships, etc.); president Radio Engineering Co. of N.Y., Hammond Research Corp. of Mass.; inventor of improved methods of phonographic reproduction, other inventions relating to radio telephony and telegraphy, radar, pipe organ mechanisms, radio and phonograph reproduction; applied for over 800 patents in U.S. and Europe.

From the description of John Hays Hammond, Jr. papers, 1912-1963 (inclusive). (Unknown). WorldCat record id: 702166562

From the guide to the John Hays Hammond, Jr. papers, 1912-1963, (Manuscripts and Archives)

Biographical Note

• 1888, Apr. 13: Born, San Francisco, Calif.
• 1905: Patented two-cycle scavenger engine
• 1910: Graduated, Yale University, New Haven, Conn.
• 1911: Established Hammond Radio Research Laboratory, Gloucester, Mass.
• 1912: Invented "electronic dog," a photosensitive homing device Performed research on intermediate frequency United States delegate to the International Radio-Telegraphic Conference, London, England
• 1914: Demonstrated high-speed radio control boat to United States Army Invented proximity fuse for torpedoes Invented thermite incendiary bomb Natalia (yacht) completed 120-mile trip controlled by Hammond's radio and gyroscopic system
• 1916 - 1918 : Developed continuous wave superheterodyne receiver using intermediate frequency Worked on radio-controlled submerged torpedo
• 1919: Doctor of Science, George Washington University, Washington, D.C.
• 1921: Researched, developed, and developed a frequency modulation (FM) system
• 1922 - 1923 : Developed a secure telephone communication system
• 1925 - 1926 : Developed unicontrol superheterodyne
• 1927: United States delegate to International Radio Conference, Washington, D.C.
• 1943: Developed a variable pitch propeller for ships
• 1950: Invented "Telespot," a system for secure televsion trnasmission of classified data
• 1959: Awarded Elliot Cresson Medal, Franklin Institute, Philadelphia, Pa.
• 1952: Developed dynamic accentuator for music amplification and reproduction
• 1965, Feb. 12: Died, Gloucester, Mass.

From the guide to the John Hays Hammond Papers, 1908-1965, (bulk 1912-1953), (Manuscript Division Library of Congress)