Alarm connectable to an external ac power supply for standby...

G - Physics – 08 – B

Patent

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G08B 17/10 (2006.01)

Patent

CA 2755560

An alarm for detecting radiation and/or pollutants such as smoke, carbon monoxide or the like, the alarm comprises: an alarm circuit (12) including detection means (14) for detecting the radiation and/or pollutants, and an audible alarm (16); a power supply circuit (24) connectable to an external AC power supply for supplying standby power to the alarm circuit (12); and a battery (20) for supplying power to the audible alarm (16) when the alarm is energised. The power supply circuit (20) is configured to supply current to the alarm circuit (12) at a level less than that required to energise the audible alarm (16).

L'invention concerne une alarme servant à détecter un rayonnement et/ou des polluants tels que fumée, monoxyde de carbone ou similaire, l'alarme comprenant : un circuit d'alarme (12) muni de moyens de détection (14) détectant le rayonnement et/ou les polluants, et une alarme sonore (16); un circuit d'alimentation électrique (24) pouvant être connecté à un réseau d'alimentation externe CA pour fournir un courant de réserve au circuit d'alarme (12); et une batterie (20) alimentant l'alarme sonore (16) lorsque cette dernière est mise sous tension. Le circuit d'alimentation électrique (20) est configuré pour alimenter le circuit d'alarme (12) en courant à un niveau inférieur à celui nécessaire pour mettre l'alarme sonore (16) sous tension.

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