Coolidge’s cool trick with tungsten

William David Coolidge received a patent on December 30, 1913 for a method of making ductile tungsten. Even though this patent was later invalidated, the process developed by Coolidge helped in brightening the world. A.S.Ganesh throws light upon Coolidge, the man who helped utilise the ductility of tungsten…

from The Hindu - Home http://bit.ly/2s1upCr