Audio coupled annunciating system for electrical panel boxes
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United States of America Patent
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Feb 11, 1997
Grant Date -
N/A
app pub date -
Dec 20, 1994
filing date -
Dec 20, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electrically powered annunciating system, for use in electrical panel boxes, having a sensing circuit including a first acoustical transducer to transmit a sonic signal to an annunciating circuit having a second acoustical transducer at a spaced distance from the first transducer to operate the annunciating circuit responsive to a sonic signal received from the first transducer. The sensing circuit powers the first acoustical transducer to produce a sonic signal responsive to a sensed electrical event such as termination of power to an electrical component. The annunciating circuit includes a tuned amplifier for signal purification and amplification, a time delay integrator to prevent accidental circuit operation caused by noise and an annunciator and a communication interface activated responsive to a sonic signal received by the second transducer. The annunciating system is particularly adapted for use in electrical panel boxes having multiple electrical components that are coupled by post and bus bar type connections, to alleviate the use of flexible wiring in the box for annunciating circuits.
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Cited Art Landscape
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