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A railway detonator, (torpedo in North America) or fog signal is a coin-sized device that is used as a loud warning signal to train drivers. It is placed on the top of the rail, usually secured with two lead straps, one on each side. When the wheel of the train passes over, it explodes, emitting a loud bang. It was invented in 1841 by English inventor Edward Alfred Cowper.[1][2]
- ^ Romanenko, A. G. (1978). "Hot-blast stoves – 120 years". Metallurgist. 22 (2): 134–136. doi:10.1007/BF01087865. S2CID 137658934.
- ^ Minutes of Proceedings of the Institution of Civil Engineers, Volume 1. 1848.