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B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
B61L3/04—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling mechanically
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FR27331D1922-10-261922-10-26Dispositif pour l'arrêt automatique des trains au passage d'un signal fermé
ExpiredFR27331E
(fr)
Dispositif automatique pour avertir le mécanicien d'un train de la position d'arrêt des signaux ou pour arrêter le train devant un signal fermé