Alarm device for a fire alarm system
AssigneeHoneywell International Inc.
InventorsMichael Barson, Karim Bouras
Life of this patent
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Abstract
An alarm device for a fire alarm system is described herein. One device includes at least one of an audio notification mechanism and a visual notification mechanism, a supercapacitor, and a controller configured to allow the supercapacitor to power the at least one of the audio notification mechanism and the visual notification mechanism upon a short circuit fault occurring on a loop of the fire alarm system while the alarm device is in an alarm state.
Claims20
An alarm device for a fire alarm system, comprising:
- at least one of an audio notification mechanism and a visual notification mechanism;
- a supercapacitor;
- and
- a controller configured to:
- allow the supercapacitor to power the at least one of the audio notification mechanism and the visual notification mechanism upon a short circuit fault occurring on a loop of the fire alarm system while the alarm device is in an alarm state;
- and
- allow the supercapacitor to charge to an average level needed to power the at least one of the audio notification mechanism and visual notification mechanism while the alarm device is in the alarm state prior to the short circuit fault occurring.
(canceled)
(canceled)
A method for operating an alarm device of a fire alarm system, comprising:
- operating a supercapacitor of the alarm device such that:
- the supercapacitor charges while the alarm device is in an alarm state;
- the supercapacitor charges to less than a fully charged level while the alarm device is in a quiescent state;
- and
- the supercapacitor powers at least one of an audio notification mechanism and a visual notification mechanism of the alarm device upon a short circuit fault occurring on a loop of the fire alarm system while the alarm device is in the alarm state.
A fire alarm system, comprising:
- a plurality of alarm devices wired in a loop, wherein each respective one of the plurality of alarm devices includes:
- an audio notification mechanism;
- a visual notification mechanism;
- a supercapacitor;
- and
- a controller configured to allow the supercapacitor to power the audio notification mechanism and the visual notification mechanism upon a short circuit fault occurring on the loop while the fire alarm system is in an alarm state;
- a loop driver;
- and
- a control panel configured to operate the loop driver to exchange data with the plurality of alarm devices in the loop.
(canceled)
Dependencies are inferred from the claim text.