Raymond W. Ketchledge

Raymond W. Ketchledge (December 8 1919 - October 23 1987) [Amos E. Joel, Jr., [http://books.nap.edu/openbook.php?record_id=1966&page=128 "Raymond W. Ketchledge, 1919-1987] ] [ [http://www.ieee.org/web/aboutus/history_center/biography/ketchledge.html biography] from IEEE] was an American engineer, known for his contributions to the first computerized
telephone switching control systems.

Born in Harrisburg, Pennsylvania, [ [http://query.nytimes.com/gst/fullpage.html?res=9B0DE1DA1731F93AA15753C1A961948260 Raymond Ketchledge, 67, an Electronics inventor] obituary from New York Times (October 29 1987)] he earned a B.Sc. and M.Sc. (1942) in electrical engineering from Massachusetts Institute of Technology before joining Bell Labs where he stayed his wholeprofessional career (1942-1982).

At Bell Labs he first worked on the Mark 24 FIDO Torpedo used in World War II,then he took part in developing the first underwater repeater systems and the L3 coaxial carrier for
Transatlantic telephone cable systems (1946-54), before he became leader of the "Switching systems" development group(1956). This brought him fame due to the pioneering work on applying stored program architecture to telephone switching systems. Ketchledge oversaw the installation project for the first 1ESS switch in Succasunna (1965).

Following thishe directed the "Indian Hill" laboratories of Naperville, Illinois (1966-75) before returning to New Jersey where he oversaw the "Ocean systems" research division in Whippany, New Jersey until his retirement.He held sixty patents in diverse areas, including thirty-one in switching system.Ketchledge died of cancer in Englewood, Florida.

Awards

*National Academy of Engineering inductee (1970)
*IEEE Alexander Graham Bell Medal (1976) with Amos E. Joel, Jr. and William Keister
*IEEE Fellow
*New Jersey Inventors Hall of Fame inductee

References