Harry Diamond (engineer)
Harry Diamond (February 12, 1900 – June 21, 1948) was an American engineer and radio pioneer who helped create the proximity fuze and early navigation beacons for aircraft. Born in Minsk, Russia, to a Jewish family, he moved to the United States with his family in 1908 and grew up in Quincy, Massachusetts. He briefly served in the U.S. Army in 1918, then earned an Electrical Engineering degree from MIT in 1922 and a master's in 1925. He taught at Lehigh University for four years before joining the National Bureau of Standards in 1927. There he led the electronics work for the Bureau of Air Commerce and helped develop the first practical radio beacon system to guide aircraft, including a vibrating-reed indicator that warned pilots if they were off course and enabled a safe landing without special equipment.
As chief of the Electronics Division, Diamond helped establish the feasibility of the radio proximity fuze, which was tested in bombs at Dahlgren, Virginia. During World War II, his group was the central laboratory for Division 4 of the National Defense Research Committee, and he played a key role in developing proximity fuze technology. Later, as Chief of the Ordnance Development Division, he oversaw fuzes for nonrotating projectiles like bombs, rockets, and mortars. Proximity fuzes increased lethality by exploding near aircraft or a target.
Diamond held 16 electronics patents. After his death, in 1953 the Army named the Ordnance Development Division the Diamond Ordnance Fuze Laboratories in his honor; it later became the Harry Diamond Laboratories. The War Department called the proximity fuze one of WWII’s most important scientific advances, second only to the atomic bomb.
Diamond died on June 21, 1948 and was buried at Arlington National Cemetery. He is survived by his wife Ida and two children, including Zelda Fichandler, who co-founded Arena Stage in Washington, D.C., in 1950 with her husband.
This page was last edited on 3 February 2026, at 20:14 (CET).