Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-01-10
2006-01-10
La, Anh V. (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S286050, C340S524000, C169S060000, C073S863310
Reexamination Certificate
active
06985081
ABSTRACT:
Fire sources or gas impurities are detected and located in one or several monitoring chambers by a device having a main detector for detecting a fire characteristic value or a gas impurity, into which a part of the ambient air in the monitoring chambers is continuously injected by an intake unit through a line, arranged in each monitoring chamber and provided with intake ports. The advantages of gas inlet systems, such as an active intake and a concealed assembly, is therefore combined with the advantage of the localization of each intake port as well as the detection of a precise fire source or a precise gas impurity. To this end, the device is provided with a sub-detector, arranged on or in the area of at least one intake port per monitoring chamber, for detecting a fire characteristic value or a gas impurity. The sub-detector is capable being switched on by a switch-on signal transmitted by a controller according to a detection signal delivered by the main detector.
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Patent Abstracts of Japan Publication No. 09147266 A, published Jun. 6, 1997.
Daniault Florence
Wagner Ernst Werner
La Anh V.
Nixon & Vanderhye P.C.
Wagner Alarm-und Sicherungssysteme GmbH
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