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Publication of FR369232ApublicationCriticalpatent/FR369232A/en
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
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FR369232D1906-08-251906-08-25
Device to make signals for semaphores
ExpiredFR369232A
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