William David Coolidge (October 23, 1873 - February 3, 1975) 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. He was also famous for the development of "ductile tungsten", which is important for the incandescent light bulb.

---

Size: 4781px × 4387px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -ray, 20th, american, bulb, century, coolidge, corporation, david, director, ductile, electric, engineer, general, incandescent, laboratory, light, machines, physicist, research, tungsten, usa, vice-president, william