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B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
B61L5/12—Visible signals
B61L5/14—Form signals, e.g. semaphore arms
B61L5/16—Local operating mechanisms for form signals
B61L5/161—Local operating mechanisms for form signals using electromotive driving means
B61L5/163—Driving mechanisms
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FR388507D1908-03-251908-03-25Dispositif de commande pour signaux de position à manoeuvre électrique
ExpiredFR388507A
(fr)