Edward Davy (16 June 1806 – 26 January 1885) was an English physician, scientist, and inventor who played a prominent role in the development of telegraphy, and invented an electric relay.Davy was born in Ottery St Mary, Devonshire, England, son of Thomas Davy (medical practitioner and house surgeon at Guy's Hospital, London). Edward Davy was educated at a school run by his maternal uncle in Tower Street, London. He was then apprenticed to Dr C.