G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B13/00—Burglar, theft or intruder alarms
G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Circuit Arrangement For Electric Light Sources In General
(AREA)
Dispositif de reglage reagissant a au moins une influence de l'environnement pour le couvercle dispose de facon rabattable d'une lucarne de toit, en particulier pour une coupole transparente