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 FR703937ApublicationCriticalpatent/FR703937A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L29/00—Safety means for rail/road crossing traffic
B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
B61L29/26—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning mechanically operated
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR703937D1930-01-091930-01-09Dispositif de signalisation annonçant par exemple l'approche d'un train
ExpiredFR703937A
(fr)