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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
B61L29/22—Operation by approaching rail vehicle or train electrically
B61L29/222—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors
B61L29/224—Operation by approaching rail vehicle or train electrically using conductor circuits with separate contacts or conductors using rail contacts
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FR421112D1910-10-051910-10-05Perfectionnement aux barrières automatiques des passages à niveau pour chemins de fer
ExpiredFR421112A
(fr)