US4047571A — Automatic fire extinguishing system for a buildin…

Claim 1

Independent Claim 121 words

In a fire extinguishing system for multicompartmented buildings said system comprising: the combination of a trunk-line duct system having an upstream inlet and a plurality of downstream branch duct outlets, at least one of said duct outlets being in each compartment to be protected, an air conditioning system having an outlet connected to said duct system inlet for providing an air stream in said duct system, a high expansion foam plug generator located adjacent at least one branch duct outlet for each compartment to be protected and control means associated with each of said compartments to be protected for simultaneously energizing said air conditioning system and said foam plug generator in response to the presence of a fire in said compartment.

Claim 2

Dependent Claim 121 words

In a fire extinguishing system for multicompartmented buildings said system comprising: the combination of a trunk-line duct system having an upstream inlet and a plurality of downstream branch duct outlets, at least one of said duct outlets being in each compartment to be protected, an air conditioning system having an outlet connected to said duct system inlet for providing an air stream in said duct system, a high expansion foam plug generator located adjacent at least one branch duct outlet for each compartment to be protected and control means associated with each of said compartments to be protected for simultaneously energizing said air conditioning system and said foam plug generator in response to the presence of a fire in said compartment.

Claim 3

Dependent Claim 93 words

A system as set forth in claim 1 wherein said foam plug generating means in each of said compartments comprises: a. a porous membrane positioned across said branch duct outlets, b. valve means, c. a source of foam forming solution, and d. a nozzle connected to said source of foam forming solution, said nozzle being located intermediate said inlet and said outlet for directing a spray of said foam forming solution against said membrane upon actuation of said valve means by said control means to thereby form said high expansion fire extinguishing foam.

Claim 4

Dependent Claim 57 words

A system as set forth in claim 2 wherein said source of foam forming solution further comprises blending means having an outlet connected to said nozzle and a first and second inlet, said first inlet being connected to a source of water under pressure and said second inlet being connected to tank means containing foam forming concentrate.

Claim 5

Dependent Claim 140 words

An automatic fire extinguishing system for a building having a plurality of rooms, a central air blower, an air ducts for feeding air from said blower to an air inlet in each room, an air outlet in each room communicating with an exhaust duct, a screen covering each said air inlet, a foaming mixture generator individual to each said screen for spraying on its associated screen a foaming liquid mixture, a fire detector in each said room, said fire detector actuating only the said associated foaming mixture generator upon detection of a fire in the associated said room, and a variable speed motor for driving said blower, said motor having high speed and low speed, said motor operating at low speed in the absence of a fire, each said fire detector actuating said motor to operate at said high speed.

Claim 6

Dependent Claim 140 words

An automatic fire extinguishing system for a building having a plurality of rooms, a central air blower, an air ducts for feeding air from said blower to an air inlet in each room, an air outlet in each room communicating with an exhaust duct, a screen covering each said air inlet, a foaming mixture generator individual to each said screen for spraying on its associated screen a foaming liquid mixture, a fire detector in each said room, said fire detector actuating only the said associated foaming mixture generator upon detection of a fire in the associated said room, and a variable speed motor for driving said blower, said motor having high speed and low speed, said motor operating at low speed in the absence of a fire, each said fire detector actuating said motor to operate at said high speed.

Claim 7

Dependent Claim 24 words

A system as claimed in claim 4, there being a screen over each said air outlet to retain foam in the associated sad room.

Claim 8

Dependent Claim 38 words

A system as claimed in claim 4, said foaming mixture generator comprising a mixer having two feed pipes for water and foaming agent and a delivery pipe with a sprayer for spraying said foaming mixture on said screen.

Claim 9

Dependent Claim 55 words

A system as claimed in claim 4, and shutters for the air inlets of each said room, all the shutters other than that associated with the room on fire being responsive to said detector of said room on fire to close partially so as to insure preferred flow of air toward the room on fire.

Claim 10

Dependent Claim 55 words

A system as claimed in claim 4, and shutters for the air inlets of each said room, all the shutters other than that associated with the room on fire being responsive to said detector of said room on fire to close partially so as to insure preferred flow of air toward the room on fire.

Claim 11

Dependent Claim 40 words

A system as claimed in claim 4, and conduit means for said water and foaming agent and for the transmission of controlled signals from said fire detectors, said conduit means being disosed inside duct work of said air conditioning system.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-09-12	1981-03-14	1981-09-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-09-12	1985-03-14	1985-09-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-09-12	1989-03-14	1989-09-13	$7700.00	Window Closed / Lapsed

Automatic fire extinguishing system for a building having central air conditioning

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag