发明名称 Monitoring alarm systems
摘要 Typical apparatus according to the present invention for detecting a predetermined type of condition (such as the presence of smoke) at a given location and providing an indication (typically audible and/or visible) of the presence of such condition, comprises an electrical detector responsive to the type of condition, for providing a potential difference of at least a predetermined amount between two predetermined points; first circuitry for connecting at least a substantial fraction of the potential difference to an electrical relay or relay analogue in the apparatus so as to provide a predetermined first indication; and second circuitry responsive to a condition in the detector or in the first circuitry that is outside of a predetermined range, and thus of possible detriment to the optimum performance of the apparatus, to provide a predetermined indication. Typically the first circuitry provides one indication concerning the presence or absence of smoke and the second circuitry provides a different indication concerning the presence or absence of possible trouble in the apparatus.
申请公布号 US6104286(A) 申请公布日期 2000.08.15
申请号 US19980098156 申请日期 1998.06.16
申请人 LUQUETTE, MARK H. 发明人 LUQUETTE, MARK H.
分类号 G08B25/04;G08B29/18;(IPC1-7):G08B29/00 主分类号 G08B25/04
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