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Publication of FR369191ApublicationCriticalpatent/FR369191A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
B61L5/20—Audible signals, e.g. detonator audible signalling
B61L5/24—Replacement of detonators
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Mechanical Engineering
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FR369191D1906-08-241906-08-24Appareil avertisseur pour chemins de fer
ExpiredFR369191A
(fr)