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HENRI DHERS
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HENRI DHERS
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Publication of FR8420EpublicationCriticalpatent/FR8420E/fr
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
B61L5/165—Local operating mechanisms for form signals using electromagnetic driving means
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Physics & Mathematics
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Engineering & Computer Science
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Mechanical Engineering
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FR8420D1907-05-241907-11-06Signaux électriques abrités pour chemin de fer
ExpiredFR8420E
(fr)