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.)
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 filedfiledCritical
Application grantedgrantedCritical
Publication of FR607286ApublicationCriticalpatent/FR607286A/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
B61L5/20—Audible signals, e.g. detonator audible signalling
B61L5/22—Devices for initiating the release of detonators in a certain position of a signal
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR607286D1925-03-131925-03-13Système de signalisation pour voie ferrée
ExpiredFR607286A
(fr)