Detector supervision apparatus and method
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United States of America Patent
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-
Aug 8, 1995
Grant Date -
N/A
app pub date -
May 29, 1992
filing date -
May 29, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A detector supervision system usable with detectors or sensors formed with a removable head and a surface mountable base includes an energy storage device which is carried on each base. The energy storage device is either a capacitor or an inductor, and is coupled to one or more of the terminals of the base. A conducting spring member is also carried on the base, attached to one of the terminals. The spring member is in a first position when the head is attached to the base. The spring member moves to the second position in response to the head being removed from the base. Detection circuitry can detect the presence of one or more energy storage devices which are switched into communication lines between detector bases in response to one or more of the heads being removed. The detection circuitry can signal a central control panel that one or more of the heads has been removed from a respective base.
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