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G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B5/00—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied
G08B5/22—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission
G08B5/24—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
G08B5/28—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with hinged flap or arm
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FR472133D1914-05-121914-05-12Perfectionnements aux systèmes de signaux
ExpiredFR472133A
(fr)