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Publication of FR853886ApublicationCriticalpatent/FR853886A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L1/00—Devices along the route controlled by interaction with the vehicle or train
B61L1/18—Railway track circuits
B61L1/181—Details
B61L1/185—Use of direct current
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Automation & Control Theory
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Mechanical Engineering
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FR853886D1938-11-221938-11-22Dispositif électrique pour la commande d'une signalisation, en particulier d'une signalisation ferroviaire
ExpiredFR853886A
(fr)