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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
B61L13/005—Operation of signals from the vehicle or by the passage of the vehicle optically actuated
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR368296D1906-07-191906-07-19Dispositif de commande automatique des circuits de signaux ou appareils analogues pour chemin de fer, etc.
ExpiredFR368296A
(fr)