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Publication numberUS3033291 A
Publication typeGrant
Publication dateMay 8, 1962
Filing dateMay 4, 1959
Priority dateMay 4, 1959
Publication numberUS 3033291 A, US 3033291A, US-A-3033291, US3033291 A, US3033291A
InventorsTorsten Wieslander
Original AssigneeTorsten Wieslander
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Methods of extinguishing fire
US 3033291 A
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Description  (OCR text may contain errors)

ilnite rates 3,033,291 Patented May 8, 1962 Fire extinguishers are known which consist of a tank containing a powder which by means of a compressed gas is expelled upon the seat of fire in the form of a dust. The powder may consist of bicarbonate of soda which when applied upon the fire cuts away the flame. If glowing particles still are left when the application of the powder has ceased it may occur that ignition happens once again.

This disadvantage is eliminated according to the present invention which relates to a method of extinguishing fire by expelling in a dry condition a powdered mixture containing bicarbonate of soda, aluminum sulfate and a proteinaceous material upon the seat of fire. The proteinaceous material may preferably consist of pea flour or casein. A filling agent such as diatomaceous earth or sand may be included in the powdered mixture.

Due to the fact that the powder according to the invention contains aluminum' sulfate in addition to the bicarbonate of soda the advantage is obtained that a development of gas under formation of foam is obtained when the powder gets in contact with moisture or steam present in the seat of fire and said gas contributes to the quenching of the fire and prevent the fire from blazing up again. By adding water after the application of the powder a foam can be produced that contributes to the extinction. This is especially the fact when extinguishing gasoline and oil fires. The proteinaceous material flows on the surface of the seat of fire and swells under formation of a shell which contributes elfectively to the quenching of the fire and prevents the fire from blazing up agaln.

A preferred embodiment of a powder mixture to be used according to the present invention consists of about 500 parts by weight of sodium bicarbonate, about 1500 parts by weight of aluminum sulfate and about 100 parts by weight of proteinaceous material. Another preferred powder mixture may consist of about 400 parts by weight of sodium bicarbonate, 400 parts by weight of aluminum sulfate and 200 parts by weight of pea flour. The proportions of the constituents may vary considerably without substantially changing the extinguishing effect.

In addition to the said constituents the powder mixture may contain casein, borax, dextrine, bone meal, trisodium phosphate or sodium chloride. In order to prevent agglomeration a minor quantity of such an agent as aluminum stearate may be added.

Having now described my invention, what I claim as 1 new and desire to secure by Letters Patent is:

1. A method of extinguishing fire which comprises applying to the seat of the tire in a dry condition a powdered mixture consisting essentially of from 4 to 5 parts of bicarbonate of soda, from 4 to 15 parts of aluminum sulphate and from 1 to 2 parts of a proteinaceous material selected from the group consisting of pea flour and casein.

2. The method of claim 1 in which a filling agent is included in the powdered mixture.

3. The method of claim 1 in which a filling agent selected from the class consisting of diatomaceous earth and sand is included in the powdered mixture.

4. A method of extinguishing fire which comprises expelling upon the seat of fire a dry powdered mixture consisting essentially of about 500 parts by weight of bicarbonate of soda, about 1500 parts by weight of aluminum sulfate and about parts by weight of proteinaceous material.

5. A method of extinguishing fire which comprises expelling upon the seat of fire a dry powdered mixture consisting essentially of about 400 parts by weight of hicarbonate of soda, about 400 parts by weight of aluminum sulfate and about 200 parts by weight of pea flour.

References Qited in the file of this patent UNITED STATES PATENTS 2,324,951 Ratzer July 20, 1943 2,901,428 Schulenburg Aug. 25, 1959 FOREIGN PATENTS 122,638 Australia Mar. 10, 1944 205,046 Australia Feb. 24, 1955 671,204 Great Britain Apr. 30, 1952

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2324951 *May 26, 1939Jul 20, 1943 Foam stabilizing composition
US2901428 *Jul 6, 1956Aug 25, 1959Chem Fab Grunan AgFire extinguishing method
AU122638B * Title not available
AU205046B * Title not available
GB671204A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3238129 *Nov 12, 1963Mar 1, 1966Grace W R & CoFire fighting compositions
US3350306 *Dec 16, 1963Oct 31, 1967Soc Etu Chimiques Ind Et AgriFire extinguishing powders
US3770059 *Feb 8, 1971Nov 6, 1973Badger CoExplosion & fire suppression system for catalytic reactors
US4402364 *Dec 17, 1981Sep 6, 1983Max KleinFire extinguishing method
US5123491 *Mar 15, 1991Jun 23, 1992Luchs Mary NMethod of fighting oil fires with sand and sandblasting
US5183117 *Jun 28, 1991Feb 2, 1993Edward StricklandFire extinguisher
US6202755 *Jun 3, 1999Mar 20, 2001Fidelity Holdings Inc.Fire extinguishing agent and method of preparation and use thereof
US8066807 *Jun 26, 2009Nov 29, 2011Daniel AdamsFire-resistant and insulating additives for building materials, their methods of production and uses thereof
Classifications
U.S. Classification169/47, 252/7, 169/35, 252/6.5, 169/77
International ClassificationA62D1/00
Cooperative ClassificationA62D1/0014
European ClassificationA62D1/00B2