Fire extinguishers – Special applications – Condition responsive control
Patent
1991-09-23
1992-04-14
Cherry, Johnny D.
Fire extinguishers
Special applications
Condition responsive control
340589, A62C 3710
Patent
active
051039168
ABSTRACT:
A differential fire and explosioin protection system is for a containment enclosure which receives pneumatically conveyed process air containing a combustible media. A pair of temperature sensors located in opposed relationship in the outlet duct of containment enclosure are responsive to changes in the outflow temperature at different rates. One temperature sensor has a thin metallic sheathed probe, while the other sensor is provided with a relatively thick wall sleeve in surrounding relationship to the probe. Control means connected to the temperature sensors is adapted to activate fire and/or explosion suppression or isolation equipment in response to a predetermined differential in temperature as sensed by the sensors during a certain time interval.
REFERENCES:
patent: 2769879 (1956-11-01), steiner
patent: 4637473 (1987-01-01), Gillis et al.
Cherry Johnny D.
Fike Corporation
Pike Andrew C.
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