William Cronk Elmore (September 16, 1909 - January 23, 2003) was an American physicist, educator, and author who is best known for his work on and related to the Manhattan project during World War II and as a professor of Physics at Swarthmore College, PA from 1938 to 1974.
Bill Elmore authored two influential books during his life, Electronics-Experimental Techniques with Matthew Sands and the Physics of Waves with Mark Heald.
He is also known for deriving a simple approximation for the delay through an RC network, known as the Elmore delay.