Gif of LNWR Emblem
London & North Western Railway Society
Glossary for the LNWR Society

Glossary Results for Word "Semaphore signal"

Semaphore signal A railway signalExplain 'Signal' which normally displayed a horizontal board or arm to indicate danger (‘On’Explain 'On (Signal)'), and an angled arm (normally between 30 and 45 degrees from the horizontal) to indicate line ‘Clear’ (‘Off’Explain 'Off (Signal)'). One variant was the slotted post signalExplain 'Slotted Signal Post', where the arm was concealed inside the post at ‘off’; another (common on the Great Northern RailwayExplain 'Great Northern Railway (GNR)')was the ‘somersault’ signal, in which the arm was pivoted centrally and was vertical at ‘off’.