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
G08B5/221—Local indication of seats occupied in a facility, e.g. in a theatre
Landscapes
Physics & Mathematics
(AREA)
Electromagnetism
(AREA)
General Physics & Mathematics
(AREA)
Non-Portable Lighting Devices Or Systems Thereof
(AREA)
Audible And Visible Signals
(AREA)
Circuit Arrangement For Electric Light Sources In General
(AREA)
Procede de determination de l'audience de spectacles, tels que des óoeuvres cinematographiques et systeme pour la mise en óoeuvre d'un tel procede.