Edward Tyer (6 February 1830 - 25 December 1912) was an English railway engineer who developed the Tyer's Electric Train Tablet system widely used in the 19th and 20th centuries on single-track railways. He devised it after the Thorpe rail accident of 1874, which left 21 people dead.
He was also an astronomer.
(Edward Tyer on Luxembourgish Wikipedia)