Fire and explosion detection and suppression
US4718497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1986 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Nov 25, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/12
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.