Fire extinguishing methods and systems

• US 5,588,493 A
• Filed: 10/25/1994
• Issued: 12/31/1996
• Est. Priority Date: 02/16/1993
• Status: Expired due to Fees

• Current Assignee: Spectronix Ltd. (Emerson Electric Company)
• Original Assignee: Spectronix Ltd. (Emerson Electric Company)
• Inventors: Spector, Yechiel, Jacobson, Esther, Vittenberg, Michael, Beinert, Zohar, Naishtut, Vida
• Primary Examiner(s): Gibson, Sharon
• Assistant Examiner(s): ANTHONY, JOSEPH DAVID
• Application Number:
  US08/328,993
• Time in Patent Office: 798 Days
• Field of Search: 252/4, 252/6, 252/305, 169/46, 169/26, 169/66, 169/68, 169/27, 169/28, 169/91, 149/19.6, 149/117
• US Class Current: 169/46
• CPC Class Codes: A62C 5/006 Extinguishants produced by combustion
• CPC Class Codes: A62C 99/0018 using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
• CPC Class Codes: C06D 3/00 Generation of smoke or mist (chemical part) compositions used as biocides, pest repellants or attractants, or plant growth regulators A01N25/18
• CPC Class Codes: F41H 9/06 Apparatus for generating artificial fog or smoke screens for producing special effects on stages A63J5/00; smoke-pot projectors, e.g. arranged on vehicles, F42B5/155
• CPC Class Codes: Y10S 149/117 Smoke or weather composition contains resin

Abstract

A method of extinguishing a fire, which includes pre-positioning a fire extinguishing device which includes at least two reactants such that when the reactants are activated they react to create solid particulate products having a diameter of about one micron or less such that, when the products come in contact with the fire they chemically inhibit the chain reactions of the fire flame and bring about the extinguishing of the fire. In one embodiment, the device is submerged in a liquid coolant and includes means for preventing entry of coolant into the device while allowing the escape of said products into the coolant when activated. Another embodiment is used to generate non-toxic smoke using a device which includes a first reactant which is potassium chlorate, potassium perchlorate, potassium dichromate, cesium nitrate or potassium nitrate, and a second reactant serving as a reduction agent. When the reactants are activated they react to create solid particulate products having a diameter of about one micron or less which creates a smoke.

Claims

1. A method of extinguishing a fire in a volume comprising:

(a) submerging a nontoxic fire extinguishing device in a liquid coolant, said device includes means for preventing entry of said coolant into said device;

said device includes a composition which comprises;

(1) a first oxidant reactant; and

(2) a second reductant reactant;

(b) activating said fire extinguishing device by reacting said composition comprising said first reactant and said second reactant, to create solid particulate products having a diameter of about one micron or less, such that when said products come in contact with the fire, said products chemically inhibit the chain reactions of the fire flame and bring about the extinguishing of the fire; and

(c) passing the said solid particulate products into said liquid coolant without any accompanied destruction of said nontoxic fire extinguishing device.

2. A method as in claim 1 wherein said means for preventing entry of coolant includes at least one downwardly directed tuyere hydraulically connected at or near the top of said device.