Fire and explosion detection and suppression
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United States of America Patent
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-
Jan 12, 1988
Grant Date -
N/A
app pub date -
Nov 25, 1986
filing date -
Dec 20, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fire and explosion detection and suppression system protects two physically adjacent zones in each of which there is a UV sensor and an IR sensor. In each zone, simultaneous detection, by the pair of sensors, of sufficient respective levels of UV and IR causes an AND gate to set off suppressor units to discharge suppressant into the zone being protected. Some of this suppressant may drift into the adjacent zone and may attenuate UV radiation in that zone. Thus, for at least a temporary period, that zone may be incapable of detecting a subsequently occurring fire or explosion. Therefore, by means of a latching circuit the output signal of an operating one of the AND gates temporarily renders the circuit of the adjacent zone capable of operating independently of UV radiation.
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