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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
B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
B61L5/1809—Daylight signals
B61L5/1845—Optical systems, lenses
G—PHYSICS
G08—SIGNALLING
G08G—TRAFFIC CONTROL SYSTEMS
G08G1/00—Traffic control systems for road vehicles
G08G1/09—Arrangements for giving variable traffic instructions
G08G1/095—Traffic lights
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FR1104356D1952-08-051952-08-05Perfectionnements aux phares lumineux pour dispositifs de signalisation
ExpiredFR1104356A
(fr)