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HENRI PIERRE DHERS
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HENRI PIERRE DHERS
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Application filed by HENRI PIERRE DHERSfiledCriticalHENRI PIERRE DHERS
Application grantedgrantedCritical
Publication of FR451553ApublicationCriticalpatent/FR451553A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L13/00—Operation of signals from the vehicle or by the passage of the vehicle
B61L13/04—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors
B61L13/045—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors using separated rail contacts, pedals or similar
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR451553D1912-12-061912-12-06Système de block automatique pour chemins de fer
ExpiredFR451553A
(fr)