Charles Hutton Gregory

Charles Hutton Gregory (1817–1898) was a British civil engineer who served as Engineer of the London & Croydon Railway from 1841 and afterwards as Consulting Engineer to the London, Brighton and South Coast and South Eastern railways. He is credited with the first practical use of the railway semaphore signal at Bricklayers Arms Junction, New Cross in 1842.

Born at London on 14 October 1817, Gregory was the son of mathematician Olinthus Gregory and was apprenticed to George Rennie. He was elected President of the Institution of Civil Engineers in 1867 and was knighted in 1881. From the 1850s he engineered railways in Brazil, Sweden, Norway and elsewhere. He died at London on 10 January 1898.