Fire extinguishers – Special applications – Condition responsive control
Patent
1998-02-23
1999-08-10
Kashnikow, Andres
Fire extinguishers
Special applications
Condition responsive control
169 56, 169 61, 169 23, A62L 3700
Patent
active
059343818
ABSTRACT:
A hazard response structure which includes a sensor mounting housing positioned over and against an aperture of an environmental enclosure to receive pressure from the enclosure and detonate a supply of suppression material to the enclosure upon an increase of pressure therein which is indicative of an impending explosion or fire. The housing is so shaped and the sensors thereof so located to eliminate the possibility of damage thereto or the accumulation of material thereabout to interfere with pressure transmission. At least three sensors are positioned in the housing and provided circuit logic requires a response from two of the three to initiate suppression material delivery to the enclosure. The sensors also provide for setting of operational thresholds without removal of the same from such housing. Safeguard circuitry, isolated from exterior circuitry, is provided which prevents discharge of the suppression control delivery when power is taken from or connected to the circuitry and which requires absolute voltage reversal to achieve triggering of the detonators of the suppression delivery system. This isolated circuitry also provides for monitoring wire continuity, relay status, switch status and capacitor status.
REFERENCES:
patent: 4022131 (1977-05-01), Redding
patent: 4520348 (1985-05-01), Swanson
patent: 4630684 (1986-12-01), Conzori et al.
patent: 4719973 (1988-01-01), Allen et al.
Cwayna James R.
Deal David
Kashnikow Andres
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