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.)
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Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
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Filing date
Publication date
Application filed by Automatic Telephone Manufacturing Co LtdfiledCriticalAutomatic Telephone Manufacturing Co Ltd
Application grantedgrantedCritical
Publication of FR562469ApublicationCriticalpatent/FR562469A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L13/00—Operation of signals from the vehicle or by the passage of the vehicle
B61L13/04—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors
B61L13/042—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors using isolated rail sections
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR562469D1922-02-211923-02-20Système de signalisation pour chemins de fer
ExpiredFR562469A
(fr)