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 FR566762ApublicationCriticalpatent/FR566762A/fr
B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
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Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
FR566762D1922-08-161923-05-26Perfectionnements aux systèmes de signaux pour chemins de fer
ExpiredFR566762A
(fr)