Raymond W. Ketchledge

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Raymond Waibel Ketchledge (December 8, 1919 - October 23, 1987)^[1]^[2] was an American engineer, known for his contributions to the first computerized telephone switching control systems.

Biography

Born in Harrisburg, Pennsylvania,^[3] 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 whole professional 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 this he 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.

He died of cancer in Englewood, Florida on October 23, 1987.

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

↑ Amos E. Joel, Jr., Raymond W. Ketchledge, 1919-1987
↑ biography from IEEE
↑ Raymond Ketchledge, 67, an Electronics inventor obituary from New York Times (October 29, 1987)

Awards
Preceded by (first)	IEEE Alexander Graham Bell Medal 1976	Succeeded by Eberhardt Rechtin

Persondata
Name	Ketchledge, Raymond
Alternative names
Short description	American electrical engineer
Date of birth	December 8, 1919
Place of birth
Date of death	October 23, 1987
Place of death

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