John Ambrose Fleming — English Inventor born on November 29, 1849, died on April 18, 1945
Sir John Ambrose Fleming FRS was a British electrical engineer and physicist. He is known for inventing the first thermionic valve or vacuum tube. He is also famous for the left hand rule. He was born the eldest of seven children of James Fleming DD, a Congregational minister, and his wife, Mary Ann, at Lancaster, Lancashire and baptised on 11 February 1850... (wikipedia)