Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie des Freins et Signaux Westinghouse SA
Original Assignee
Compagnie des Freins et Signaux Westinghouse SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie des Freins et Signaux Westinghouse SAfiledCriticalCompagnie des Freins et Signaux Westinghouse SA
Application grantedgrantedCritical
Publication of FR1027989ApublicationCriticalpatent/FR1027989A/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
B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
B61L5/1809—Daylight signals
B61L5/1845—Optical systems, lenses
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR1027989D1949-07-291950-07-24
Improvements to optical projection devices
ExpiredFR1027989A
(en)