Commercial cooking unit fire extinguisher

• US 3,889,757 A
• Filed: 11/19/1973
• Issued: 06/17/1975
• Est. Priority Date: 04/05/1971
• Status: Expired due to Term

• Current Assignee: Fire-Fx, LLC
• Original Assignee: Byron G. Dunn
• Inventors: Dunn, Byron G.
• Primary Examiner(s): King, Lloyd L.
• Assistant Examiner(s): Mar, Michael
• Application Number:
  US05/417,083
• Time in Patent Office: 575 Days
• Field of Search: 169/26,2R,28,30,31R,33,65,59
• US Class Current: 169/59
• CPC Class Codes: A62C 3/006 for kitchens or stoves

Abstract

A fire extinguishing system for a cooking complex having a plurality of individual cooking units which includes a plurality of individual extinguishing systems equal in number to the number of cooking units, each of the extinguishing systems including a container, a dry, chemical extinguishing agent disposed in the container, such as a mixture of about 50 to 95% by weight of an alkali metal carbonate, an alkali metal bicarbonate, an alkaline earth metal carbonate, an alkaline earth metal bicarbonate or mixtures thereof and about 50 to 5% by weight and sufficient to prevent reignition of an extinguished flame of a synthetic metal silicate, distributing means, such as a distributing nozzle, operatively mounted on the container and adapted to distribute the extinguishing agent over the cooking unit to be protected, propellant means, such as a bottle of a normally gaseous material under pressure, within the container adapted to generate a gas pressure on the extinguishing agent sufficient to force the extinguishing agent through the distributing means and a flameresponsive ignition means resistant to spontaneous ignition at temperatures encountered above the cooking unit to be protected, such as a fuse wire of aluminum or magnesium and a noble metal, operatively connected to the propellant means to actuate the propellant means and cause it to generate gas pressure and extending from the container and freely exposed in the area above the cooking unit to be protected. The ignition means may be connected in an electrical circuit controlling the cooking unit to automatically turn off the cooking unit when the ignition means burns.

Claims

1. A fire extinguishing system for a cooking complex having a plurality of individual cooking units, comprising, a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a container, a dry, chemical extinguishing agent disposed in said container, distributing means operatively mounted on said container and adapted to distribute said extinguishing agent over the cooking unit to be protected, propellant means within said container adapted to generate a gas pressure on said extinguishing agent sufficient to force said extinguishing agent through said distributing means, an open frame structure surrounding said distributing means, and a flameresponsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, operatively connected to said propellent means to actuate said propellant means and cause it to generate gas pressure and disposed about said open frame structure.

2. A fire extinguishing system for a cooking complex having a plurality of individual cooking units, comprising a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a generally cylindrical container, a dry, chemical extinguishing agent disposed in said container, distributing means operatively mounted on said container and adapted to distribute said extinguishing agent over the cooking unit to be protected, propellant means within said container including a gas generating means and a gas-impervious piston means between said gas generating means and said extinguishing agent and in gas-tight engagement with the walls of said container and adapted to generate a gas pressure on said piston means sufficient to force said extinguishing agent through said distributing means and a flame-responsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, operatively connected to said propellant means to actuate said propellant means and cause it to generate gas pressure and extending from said container and freely exposed in the area above said cooking unit to be protected.

3. A fire extinguishing system for a cooking complex having a plurality of individual cooking units, comprising, a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a container, a dry, chemical extinguishing agent disposed in said container, distributing means including a disc having a plurality of curved slots each leading from the edge of said disc toward the center thereof and outwardly diverging horn means extending from said disc, operatively mounted on said container and adapted to distribute said extinguishing agent over said cooking unit to be protected, propellant means within said container adapted to generate a gas pressure on said extinguishing agent sufficient to force said extinguishing agent through said distributing means and a flame-responsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, operatively connected to said propellant means to actuate said propellant means and cause it to generate gas pressure and extending from said container and freely exposed in the area above said cooking unit to be protected.

4. A fire extinguishing system for a cooking complex having a plurality of individual cooking units, comprising, a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a container, a dry, chemical extinguishing agent disposed in said container, distributing means operatively mounted on said container and adapted to distribute said extinguishing agent over the cooking unit to be protected, propellant means within said container adapted to generate a gas pressure on said extinguishing agent sufficient to force said extinguishing agent through said distributing means, a flame-responsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, operatively connected to said propellant means to actuate said propellant means and cause it to generate gas pressure and extending from said container and freely exposed in the area above said cooking unit to be protected and also forms the fuse element of a fuse means and said fuse means is operatively mounted in an electrical circuit controlling said cooking unit to shut off said cooking unit.

5. A fire extinguishing system for a cooking complex having a plurality of individual cooking units, comprising, a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a container, a dry, chemical extinguishing agent disposed in said container, distributing means operatively mounted on said container and adapted to distribute said extinguishing agent over said cooking unit to be protected, propellant means within said container adapted to generate a gas pressure on said extinguishing agent sufficient to force said extinguishing agent through said distributing means and a flame-responsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, operatively connected to said propellant means to actuate said propellent means and cause it to generate gas pressure, extending from said container and freely exposed in thE area above said cooking unit to be protected and connected to an electrical switch means mounted in an electrical circuit controlling said cooking unit to shut off said cooking unit.

6. A fire extinguishing system for a cooking complex having a plurality of individual cooking units, comprising, a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a container, a dry, chemical extinguishing agent including a major proportion of about 50 to 95% by weight of a material selected from the group consisting of an alkali metal carbonate, an alkaline earth metal carbonate, an alkali metal bicarbonate, an alkaline earth metal bicarbonate and mixtures thereof and a minor amount of about 50 to 5% by weight and sufficient to prevent reignition of an extinguished flame on the cooking unit over which said extinguishing agent is distributed of a synthetic metal silicate disposed in said container, distributing means operatively mounted on said container and adapted to distribute said extinguishing agent over the cooking unit to be protected, propellant means within said container adapted to generate a gas pressure on said extinguishing agent sufficient to force said extinguishing agent through said distributing means and a flame-responsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, operatively connected to said propellant means to actuate said propellant means and cause it to generate gas pressure and extending from said container and freely exposed in the area above said cooking unit to be protected.

7. A fire extinguishing system for a cooking complex having a plurality of individual cooking units, comprising, a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a container, a dry, chemical extinguishing agent disposed in said container, distributing means operatively mounted on said container and adapted to distribute said extinguishing agent over said cooking unit to be protected, propellant means within said container adapted to generate a gas pressure on said extinguishing agent sufficient to force said extinguishing agent through said distributing means and a flame-responsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, including, 20 to 80% by volume of a metal selected from the group consisting of platinum and palladium and 80 to 20% by volume of a metal selected from the group consisting of aluminum and magnesium, operatively connected to said propellant means to actuate said propellant means and cause it to generate gas pressure and extending from said container and freely exposed in the area above said cooking unit to be protected.

8. A fire extinguishing system for a gas-operated cooking complex having a plurality of individual cooking units, comprising, a plurality of individual extinguishing systems equal in number to the number of said cooking units, each of said extinguishing systems, comprising, a container, a dry, chemical extinguishing agent disposed in said container, distributing means operatively mounted on said container and adapted to distribute said extinguishing agent over the cooking unit to be protected, propellant means within said container adapted to generate a gas pressure on said extinguishing agent sufficient to force said extinguishing agent through said distributing means, a flame-responsive ignition means resistant to spontaneous ignition at temperatures encountered above said cooking unit to be protected, operatively connected to said propellant means to actuate said propellant means and cause it to generate gas pressure, extending from said container and freely exposed in the area above said cooking unit to be protected and operatively connected to a gas shutoff valve Controlling said cooking unit to shut off said cooking unit.