Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1997-12-16
1999-10-19
Paladini, Albert W.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 64, 340321, 340628, 315 86, G08B 1710
Patent
active
059694378
ABSTRACT:
A dual powered flashlight responsive to an audible smoke detector alarm includes a sound sensor for sensing an audible smoke detector alarm and producing an electrical alarm signal in response; a frequency-sensitive amplifier amplifying the electrical alarm signal but not other signals; an integrator for integrating the electrical alarm signal amplified by the frequency-sensitive amplifier and for generating a trigger signal only when the integrated signal exceeds a threshold; a lamp; a battery connector for receiving a battery for providing current for illuminating the lamp; a power supply including a mains connector connectable to electrical power lines and powering the frequency-sensitive amplifier and the integrator; and a switch receiving the trigger signal and a power supply signal from the power supply for connecting the lamp to the battery in response to at least one of a trigger signal and absence of application of electrical power to the mains connector. The flashlight illuminates automatically in the event of a power failure or generation of a smoke detector alarm and remains illuminated so long as the power failure or alarm continues or upon unplugging from the power lines to aid in escape from smoke or a power failure.
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Kalidon Technology, Inc.
Paladini Albert W.
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