Bang light signal

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The bang light signal ensured that a main signal was observed in rail traffic by means of an acoustic and visual warning.

If a signal was set to "Stop", a lever connected to it simultaneously placed three bang capsules on a bracket on the rail. If the signal showing "stop" was run over, the leading vehicle of the train triggered the bang capsules, which "generate a strong bang, lightning-like light effect and a sharp smell" when run over. The train had to stop immediately when the pop light signal was triggered. If the main signal was set to "Drive clear", the boom was also removed from the track. The Prussian State Railways used such signals.

source

  • Railway Directorate Mainz (ed.): Official Gazette of the Royal Prussian and Grand Ducal Hessian Railway Directorate in Mainz from April 24, 1909, No. 21. Announcement No. 300: Knall light signal at the Kostheim operating station , p. 210.