Fire extinguishers – Special applications – Condition responsive control
Patent
1989-06-12
1990-09-25
Joyce, Harold
Fire extinguishers
Special applications
Condition responsive control
169 48, F24F 1100
Patent
active
049585541
ABSTRACT:
An apparatus for containment of fire within ventilation ducts in a building. To this end, a lattice consisting of highly thermally conductive material, such as expanded metal, is placed in the cross section of the ventilation duct, the lattice then conducting the heat to the walls of the ventilation duct and is thereby able to prevent or delay the passage of the flames. Since such a lattice becomes fouled during operation of ventilation system, it must be easy to replace and clean. For this reason, it is recommended that the particle filling, in the form of bulk expanded metal balls, be placed on a rigid midplane consisting of transverse supports or perforated plates, etc.
REFERENCES:
patent: 2106750 (1938-02-01), Koch
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