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ELECTRO IONIQUE SA
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ELECTRO IONIQUE SA
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Publication of FR773436ApublicationCriticalpatent/FR773436A/fr
G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
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FR773436D1934-05-181934-05-18Dispositif pour la transmission de signaux depuis des véhicules en mouvement et à ces véhicules
ExpiredFR773436A
(fr)
Dispositif de transmission de signaux à un train pour la transmission de différents signaux, comportant l'utilisation de circuits accordés sur une même fréquence ousur des fréquences différentes