G08B—SIGNALLING OR 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
Landscapes
Physics & Mathematics
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General Physics & Mathematics
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Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles
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Circuit d'alimentation delivrant des tensions continues d'egale grandeur mais de polarite opposee, notamment pour appareils de reproduction sonore a bord d'automobiles
Système de commande de vitesse d'un moteur de groupe moto-ventilateur, notamment pour une installation de chauffage et/ou de climatisation de véhicule automobile