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Publication of FR809173ApublicationCriticalpatent/FR809173A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L29/00—Safety means for rail/road crossing traffic
B61L29/08—Operation of gates; Combined operation of gates and signals
B61L29/18—Operation by approaching rail vehicle or train
B61L29/20—Operation by approaching rail vehicle or train mechanically
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FR809173D1936-07-101936-07-10Fermeture et réouverture automatiques des passages à niveau par le train même et à une distance prédéterminée
ExpiredFR809173A
(fr)