Alarm device system with simultaneous AC/DC power source
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United States of America Patent
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May 8, 2018
Issued Date -
N/A
app pub date -
May 27, 2016
filing date -
Feb 28, 2011
priority date (Note) -
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Abstract
Disclosed is an alarm device system with simultaneous AC/DC power. The system includes of one or more alert devices wired into a dedicated circuit with a single location housing a DC power backup source, such as a rechargeable DC battery. The DC power backup source may be replaceable or rechargeable with DC current from an AC-DC transformer-rectifier, a photovoltaic cell, or other means. A dedicated circuit is energized with a composite current to provide continuous, uninterrupted DC backup power, upon which line AC is superimposed. AC and continuous DC backup are simultaneously provided to a system of detection and alert devices, such as smoke alarms, electrically coupled to the dedicated circuit.
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