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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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FR464712D1913-11-101913-11-10Dispositif assurant automatiquement la sécurité de l'exploitation des voies ferrées et autres similaires
ExpiredFR464712A
(fr)