Fire extinguishers – Processes – Of extinguishing fire
Patent
1996-05-16
1997-07-29
Pike, Andrew C.
Fire extinguishers
Processes
Of extinguishing fire
169 62, 252 2, A62C 307
Patent
active
056514166
ABSTRACT:
A scheme for essentially instantaneous kills of fires in crew compartments s shown which is effective over a wide variety of climatic temperatures. An extinguishant is mixed according to the formula, (M.sup.+ A.sup.-).sub.sat +H.sub.2 O+fps+d @T, where A.sup.- is either an acetate in the form H.sub.2 CCOO.sup.-, chloride, or bromide, M.sup.+ is an alkali metal or ammonium, fps is a freezing point suppressant, d is a surfactant, and (M.sup.+ A.sup.-).sub.sat is a saturation level of compound M.sup.+ A.sup.- at temperature T. In one embodiment of our scheme, potassium acetate is both the (M.sup.+ A.sup.-).sub.sat and the fps in the foregoing formula. The scheme includes charging an extinguisher bottle with the extinguishant under pressure, opening a gate device connecting the bottle to a feeder line, and allowing the extinguishant to flow in the line to a nozzle. The extinguishant is then sprayed through the nozzle, which is disposed at the fire in the compartment. The scheme also includes passing the extinguishant past a container having an opening at the line. The opening has a screen barrier between water in the container and the line. When extinguishant flows past the opening, water from the container enters the line, thus offsetting water vaporization in the line and preventing precipitate depositing in the line.
REFERENCES:
patent: 2745807 (1956-05-01), Anthony, Jr. et al.
patent: 3274105 (1966-09-01), Mevel
patent: 3338829 (1967-08-01), Langguth et al.
patent: 4406797 (1983-09-01), Altman et al.
patent: 5085786 (1992-02-01), Alm et al.
Clauson Michael J.
Hughes John O.
Kuhn David L.
Pike Andrew C.
Taucher Peter A.
The United States of America as represented by the Secretary of
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