F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
98/17, 98/41
F24F 7/06 (2006.01) A62C 2/06 (2006.01)
Patent
CA 1058946
TITLE MEANS FOR RETARDING THE SPREAD OF FIRE FROM A SPACE IN AN ENVIRONMENT ISOLATING STRUCTURE INVENTOR Tibor Z. Harmathy ABSTRACT OF THE DISCLOSURE A means for retarding the spread of fire from a space in an environment isolating structure, e.g. a building or a ship, comprises a duct system for conveying gases away from a fire in the space, an access gate operable to connect the space to the duct system, a fan for aiding the movement of the gases along the duct, and a means for opening the gate and starting the fan when a fire occurs in the space. The cross- sectional area of the duct system is related by formulae to the area of air intake to the space and the pressure head to be de- veloped by the fan in order to i) drain away smoke and flames from the space containing the fire, ii) produce a depression in the space and thereby prevent the flames and smoke from entering any neighboring spaces, and iii) draw sufficient air into the space to ensure relatively low fire temperature and a relatively short fire duration. Preferably a release. gate isolates the exit end of the duct system from the out- side atmosphere until a fire occurs in the space.
279896
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