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William David Coolidge (/ ˈ k uː l ɪ dʒ /; October 23, 1873 – February 3, 1975) [1] was an American physicist and engineer, who made major contributions to X-ray machines. He was the director of the General Electric Research Laboratory and a vice-president of the corporation.
William D. Coolidge (born October 23, 1873, Hudson, Massachusetts, U.S.—died February 3, 1975, Schenectady, New York) was an American engineer and physical chemist whose improvement of tungsten filaments was essential in the development of the modern incandescent lamp bulb and the X-ray tube.
William David Coolidge was born in Hudson, Massachusetts, on 23 October 1873. He excelled in his one-room elementary school and small high school, and in 1891 he enrolled in a nine-year-old electrical engineering program at the Massachusetts Institute of Technology in Cambridge.
Dr. W. D. Coolidge (1873-1975) was one of the most important innovators of the 20th century. Coolidge developed the ductile tungsten filament used in lightbulbs, fluorescent lamps, car ignitions and vacuum tubes.
Mar 8, 2016 · William David Coolidge was born in Hudson, Massachusetts, on 23 October 1873. He excelled in his one-room elementary school and small high school, and in 1891 he enrolled in a nine-year-old electrical engineering program at the Massachusetts Institute of Technology in Cambridge.
Coolidge's first assignment was to investigate why tantalum lamp filaments quickly broke when operated on alternating current. This work led him into the hunt for a metal filament lamp to replace the carbon filament developed by Edison.
Coolidge joined the staff of General Electric Company's Research Laboratory in 1905 and early in his career played a major role in the development of the modern incandescent lamp. He invented ductile tungsten, the filament material still used in such lamps.
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