Abstract: A fire control foam distribution system wherein foam is distributed to the area below a passenger boarding bridge includes a telescoping pipe system to get the foam to delivery manifolds at intermediate and at an outboard location of the passenger boarding bridge. Multiple foam delivery discharge nozzles are attached to the delivery manifolds to assist in directing the foam to the area below the passenger boarding bridge.

Abstract: A vertical installation structure includes a plurality of placing stages on each of which information processing apparatuses are to be installed, and supporting members for supporting the plurality of placing stages so that the plurality of placing stages are vertically arranged. A vertical installation system includes the above vertical installation structure, and moving structure capable of moving along the vertical installation structure, the moving structure having a plurality of stages on each of which at least one information processing apparatus is to be placed and supporting members for supporting the plurality of stages so that each of the plurality of stages is level with a corresponding one of the plurality of placing stages of the vertical installation structure. The information processing apparatus set on each of the stages is transferred to the corresponding one of the plurality of placing stages of the vertical installation structure.

Abstract: A shroud for use with a sprinkler assembly in a corrosive environment comprising a secondary bag surrounding the sprinkler head to protect it from the corrosive environment for a minimum period of time, a ribbon-shaped corrosion sensor located adjacent to the outer surface of the secondary bag that corrodes apart to electrically trigger an alarm before the ability of the secondary bag to protect the sprinkler head fails, a primary bag surrounding the secondary bag and the sensor to protect them from the corrosive environment for a minimum period of time, a pair of gaskets with an opening for the sprinkler head, the bags extending through the opening of one of the gaskets and annular skirts extending from the edge of the bag openings being sandwiched between the gaskets and held together by a pressure-sensitive adhesive, the bags melting at a temperature that is higher than the normal temperature of the corrosive environment and lower than the temperature at which the sprinkler head activates.

Abstract: The machine constitutes a tracked type vehicle (1) able to adapt itself to the various terrain irregularities. It includes nozzles to project pressurized air (11) fed by compressors (8) placed upon the general machine chassis, including furthermore fire producing gas projection nozzles (12) that produce fire as the machine advances, so that said nozzles (11) and (12) direct air and fire in the desired direction in order to create a fire lane. The machine incorporates the means necessary to hook a trailer (19) carrying water tanks (21), fire extinguishing fluid tanks (22) and mixing tanks (23) to enable the projection of said components in case of emergency. Said machine is particularly designed to burn off land strips close and parallel to a fire front, so as to prevent it from spreading.

Abstract: A Fire Fighting System includes a vehicle with one or more mounted motors, a fire shield system, and an emergency fire retardant discharge system. The motors are equipped with cutting elements including cutting teeth, paddle teeth, and severe duty fire whips. The fire shield system may include a series of flame and heat retardant coverings placed on all exposed parts of the system to prevent damage from exposure to extreme heat. The emergency fire retardant discharge system distributes chemical fire retardant in the event the fire comes too close to the system. In operation, the vehicle operator positions the system at the edge of a fire line and energizes the motors causing the cutting elements and whips to begin rotating. Once rotating at full speed, the vehicle is advanced along the fire line with the cutting elements cutting and slashing the burning vegetation. Once cut, the burning vegetation is thrown aside by the severe-duty fire whips that rotate to throw the debris back towards the fire.

Abstract: An installation for fighting a fire in a room having a door has a first spray head at a first location for spraying a fluid into the room and a second spray head at a second location adjacent the door for spraying a fluid as a barrier of for-like spray. A first release arrangement in the room activates the first spray head and a second release arrangement releases the second spray head but also receives fluid from the first spray head for distributing the fluid from the first and second spray heads when the first spray head is activated.

Abstract: In a typical industrial boiler installation the hot exhaust gases are directed through a conduit to a thermal heat exchanger where a closed circuit exchanger carries a flammable fluid such as oil. Located within this section is a plurality of liquid spray nozzles which, upon detection of a fire, spray an amount of cool liquid into the hot gas stream which flashes to steam, thereby cooling the equipment and suppressing the fire by supplanting the oxygen within the gas stream.

Abstract: The object of the invention is to provide an apparatus for the cooling and quenching of destructive fires. The Fire Extinguishing Capsule comprises two double-walled hemishapes which are sealed together by an equatorial belt seal which may be raptured in order to disperse the extinguishant in the capsule. The capsule may be suspended in sire or from a hook and ladder system or a helicopter in the case of forest fires or oil well fires or transported by sled to a fire scene.

Abstract: A fire resistant industrial water cooling tower (20) is disclosed having normally closed passive vent structure (28) which vents the interior of the tower (20) above the area which is undergoing combustion to enhance suppression of the fire. The vent area is dependent upon the location and extent of the fire. The vent structure (28) comprises means presenting a series of vent openings which are closed by a component (88) that responds to flames and/or hot products of combustion to move out of blocking relationship to the opening thus venting the interior of the tower. In preferred embodiments, the vent includes a panel member (82) having a series of openings (83) therein which are either covered or blocked by a synthetic resin member (88) formed of a material which will burn and has a relatively low melt temperature thereby causing the material to either burn or rapidly melt when subjected to flames and/or hot products of combustion resulting from a fire in a part of the tower.

Abstract: The present invention provides a method for extinguishing ship container fires by introducing an inert gas into the container to drive combustible gas such as air out of the container. The method includes the steps of drilling at least one hole in a wall of a ship container, attaching a toggle bolt to one end of a wall fitting, sliding a gasket over the other end of the wall fitting, inserting the wall fitting into the drilled hole such that the toggle bolt expands against the inside wall of the container, sealingly attaching the wall fitting around the drilled hole, attaching tubing to the fitting to establish fluid communication between the tubing and the inside of the container, coupling a portion of the tubing to a source of inert gas, and controlling the communication of the inert gas through the tubing and fitting to drive combustible gas out of the container.

Abstract: A remote fuel station designed for fuelling of equipment in potentially hazardous situations such as in mines comprises an enclosed container that is adapted to receive a fuel tank or bladder and which includes a containment volume capable of holding the entire contents of the tank or bladder in the event of rupture of the latter. The station also includes a door arrangement adapted to effectively seal the interior to cut off air supply if a fire should develop, and also includes a sprinkler system or a chemical fire suppressant arrangement.

Abstract: A fire suppression system for a dumb waiter for carrying hazardous materi in a multiple story building includes an exhaust at the top of the shaft, a storage compartment for carbon dioxide gas above the topmost floor served by the dumb waiter, a first nozzle in the shaft near the top thereof, a second nozzle in the shaft near the bottom thereof, and conduits interconnecting the storage compartment and the nozzles. The system further includes vapor detectors in the shaft, each of which is adapted, upon detection of unsafe vapors in the shaft, to open the conduits to flow the carbon dioxide gas from the storage compartment to the nozzles and thence into the shaft above and below the dumb waiter, and to shut down operation of the exhaust.

Abstract: A collapsible fire fighting bucket assembly to be suspended from an aircraft for fighting wild fires, the bucket being made of pliable material and having an open upper end for filling from a body of water. A tubular extension extends from an opening in the bottom of the bucket and has a free end formed with a discharge port provided with resilient sealing lips which are brought into sealing engagement with each other to close the port to minimize water leakage from the tubular extension. A harness suspends the bucket from the aircraft and a releasable support releasably supports the free end of the tubular extension within the bucket body extending upwardly from the opening to close the discharge port. The releasable support cooperates with the openings to allow the tubular extension to be rapidly lowered so as to extend downwardly from the bottom to open the discharge port for dumping the water.

Abstract: A portable apparatus for extinguishing chimney fires. The apparatus includes a cleaning device consisting of a plurality of chains on a ring attached to the end of a chain that passes over idler pulleys and is wound on a drum that is manually turned by a crank and locked at any desired position. The pulleys and drum are mounted on a supporting structure that includes adjustable telescoping legs so that the apparatus can be setup on a roof with the cleaning device in a position to be lowered into the top of the chimney to dislodge the burning material that had accumulated on the chimney liner.

Abstract: An emergency scrubbing system guides rapidly escaping noxious fluid under pressure along an irregularly shaped non-linear delay path of travel, and admits a treating substance to the fluid to provide a preliminary treatment therefor to help neutralize the fluid. The preliminarily treated fluid is then treated at the exit end of the delay path for providing a final treatment before releasing it to the atmosphere. The final treatment is prepared as the fluid flows through the delay path for a predetermined period of time substantially equal to the length of time required for the fluid under pressure to flow through the delay path.

Abstract: A remote fire fighting method provides for remote and early response delivery of solid carbon dioxide in capsules by means of standard artillery guns to cool the fire and displace needed oxygen from the fire, useful for fighting fires difficult to approach such as forest fires as well as fires in developed areas, such as urban multistory buildings. Projectiles of encapsulated solid carbon dioxide are produced and strategically stored refrigerated until a fire occurrence at which time they are launched as a projectile from standard artillery guns in a pattern that surrounds the windward side adjacent and outside the fire followed by a pattern of launched projectiles about one-third of the way into the fire from the leeward side such that carbon dioxide gas from said first and second sets envelopes at least a portion of the fire area and migrates through the fire, chilling it and excluding oxygen for combustion therein to arrest progress of and extinguishing the fire.

Abstract: The present invention features an improved chimney fire safety device. The device includes a cylindrical canister that is affixed in the top of a chimney or stove pipe. The canister contains one or more membranes containing extinguishing compounds. A metal dish is disposed in the bottom of the canister, and holds the extinguishing compounds in place until needed. The walls of the canister adjacent the metal dish are coated with a frictionless, high-temperature, anti-seize material, so that the metal dish will drop from the canister without difficulty at the proper time. A fuse cap is affixed to the bottom of the canister. The fuse cap is contiguously held to the metal dish, and keeps it in place until a predetermined temperature of an uncontrolled fire is reached. Thereafter, the fuse cap will disintegrate and allow the metal dish to drop from the canister.

Abstract: A fire extinguishing apparatus for use in normally ventilated or confined spaces of, for example, vehicles, such as an aircraft engine compartment, has an inflatable bag to enhance extinguishing agent performance. The inflatable bag is connected to a source of gaseous or vaporizable liquid fire extinguishing agent which upon discharge flows to the bag resulting in its deployment into the compartment. The bag is configured to block the normal compartment ventilating air path while allowing for dispersal of agent from the bag into the compartment to effect extinguishment.

Abstract: A method for extinguishing a fire in a volume having walls or other surfaces includes pre-positioning a fire-extinguishing device in communication with the volume. The device includes a solid-fuel composition comprising a first reactant and a second reactant. The pre-positioning of the method comprises painting or coating the composition on surfaces of the walls or on the other surfaces of the volume. A coolant material may also be painted over the pre-positioned composition. The composition is activated by igniting it so as to cause the first and second reactants to react with each other to create an aerosol of solid particulate products having a diameter of about one micron or less. The solid particulate products of the aerosol are effective in extinguishing the fire by chemically inhibiting the chain reactions of the fire.

Abstract: A flame extinguishing apparatus cooperates with a flare boom conductor discharge port to vent a stream of combustible gas into the atmosphere. The apparatus includes a nozzle, positioned in and adjacent to the flare boom conductor gas discharge port, directing a shaped stream of a flame impeding fluid toward the discharge port. The fluid stream thus forms a gas penetrable quasi-barrier which extinguishes the flame and concurrently dilutes the vent gas.

Abstract: Cooling liquid flowing through cooling-liquid passages cools in heat-transmission manner an inner layer on an inner surface of an impermeable intermediate layer and is directed through a piping to an interface between the intermediate and outer layers, whereby the porous outer layer is cooled by latent heat generated by evaporation of the cooling liquid infiltrated into the porous outer layer.

Abstract: Cooling liquid flowing through cooling-liquid passages cools in heat-transmission manner an inner layer on an inner surface of an impermeable intermediate layer and is directed through a piping to an interface between the intermediate and outer layers, whereby the porous outer layer is cooled by latent heat generated by evaporation of the cooling liquid infiltrated into the porous outer layer.

Abstract: A door includes an apparatus for reducing smoke associated therewith. The door is particularly advantageous in reducing smoke in a fire to thereby allow a firefighter or a victim trapped in a fire to readily indentify an exit. The door includes a nozzle or plurality of nozzles mounted upon the door, with a liquid source connected to the nozzle. Preferably, the door additionally includes a supply of pressurized water therein, with a surface active agent in an amount of 0.

Abstract: Cooling liquid flowing through cooling-liquid passages cools in heat-transmission manner an inner layer on an inner surface of an impermeable intermediate layer and is directed through a piping to an interface between the intermediate and outer layers, whereby the porous outer layer is cooled by latent heat generated by evaporation of the cooling liquid infiltrated into the porous outer layer.

Abstract: A fluffy pulp previously dried, having a consistency by 90%, is introduced in a baler where it is subjected to a carbon dioxide comprising atmosphere in order to both reduce or eliminate the fire risk in the baler and to decrease the pH of the pulp by chemically reacting with it. Both gaseous and liquid (snow) carbon dioxide can be used. Preferably, carbon dioxide snow is injected at the bottom of the baler to accelerate the pH control of the pulp, just before compressing the pulp in bales, which compression enhances the pH control reaction between the pulp and the carbon dioxide.

Abstract: Fire-endangered installations arranged in commercially available housings (1) are kept operable for longer on exposure to fire if they are covered, in the mounted state, by a protective housing (5) made from a fire-protection composition which foams up on exposure to fire.

Abstract: There is described a portable water monitor for fire fighting, irrigating or other watering purposes. The water invention is of compact, stable, light-weight configuration. The device has a base unit which may be filled with water to increase the weight of the unit when deployed in the field. Compact plumbing is provided which permits the monitor nozzle to be rotated 360.degree. in the horizontal direction about a vertical axis swivel coupling and to be elevated and depressed in a ball and socket coupling. The ball and socket coupling additionally provides that the monitor nozzle may be offset relative to the swivel action coupling on the ball and socket coupling. This offset, which is actually the ability to point the nozzle away from the unit's vertical axis, creates a rotational force for the nozzle by harnessing a portion of the reaction force which acts through the center of the nozzle. The unit can be manually or remotely controlled.

Abstract: An apparatus arranged to orient a closure cap over an entrance opening of a chimney stack to prevent a fire from projecting through the stack with the apparatus to include a spring-biased member and a fusible link permitting release of a plug member to secure the plug member within the chimney stack upon release of the fusible link.

Abstract: A container includes a fill cap, with a delivery conduit directed exteriorly of the fill cap, with a lower distal end within the container adjacent a floor of the container. The delivery conduit is arranged to include a delivery tube end member that includes a forward portion with a collar thereabout, including an outer conduit adjacent an inner central conduit, and the outer conduit is vented rearwardly of the collar for venting of fumes within a delivery fuel tank. A pressurizing squeeze bulb is in pneumatic communication interiorly of the container to effect pressurizing of fuel and fluid contained therewithin for direction through the delivery conduit, wherein the delivery conduit may further include a shut-off valve to cease fuel flow therethrough.

Abstract: The invention concerns a sprinkler system for refrigerated spaces and sets the task of assuring a longer minimum-time functional capacity for such devices after they have been switched to the operating state. This objective is resolved by an overdimensioning of the piping in combination with special dry sprinklers.

Abstract: A diffuser (10) is disclosed which is suitable for use in high security areas such as a jail. The diffuser is constructed of 10 gauge plate and defines an inlet passage (16) and a return passage (18). The return passage (18) can be utilized as a second inlet passage if desired. The air flow is through slots in a plate (34). A deflector portion (24) is curved over the slots to deflect the air in a first direction. In a second embodiment, a diffuser (100) is provided with slotted plates (102, 104) and a deflector (112) to discharge air in opposite horizontal directions.

Abstract: A fire or explosion suppression system provided with a source of pressurized suppressant and an apertured release suppressant nozzle which extends into the area protected by the system is provided with a cover unit which prevents the nozzle from becoming clogged or impeded by solid materials present in the protected zone. The cover unit that envelops the nozzle is of elastomeric material and has four internal grooves defining lines of weakness which present a cross-pattern. Upon release of the suppressant, the cover unit ruptures along the lines of weakness whereby the petal-shaped areas of the unit defined by the grooves open up for free flow of suppressant therepast.

Abstract: A device for eliminating fire risk due to hot particles (12) in the form of burning or glowing material passing within a pipeline (10). The device includes a valve (18) which can be controlled to block the pipeline when a risk of fire is indicated in the pipeline and/or connected parts, and a container (16) with an extinguishing agent. The extinguishing agent intended to be fed into the pipeline (10) as the pipeline is blocked by the valve preferably consists of a gas or liquid. The container (16) is connected to the valve (18) via a line (10) for the extinguishing agent. In this way, an extinguishing agent passing out of the container (16) will initiate the release of the valve (18).

Abstract: An expandable barrier for isolating a mine entry or similar open area is disclosed wherein the expandable barrier includes an expandable hollow curtain or bag housed within a horizontal brace member connected to the roof of an entry, the expandable hollow curtain being connected to vertical brace members adjacent to the walls of the mine entry. The expandable bag fills with a material capable of expanding the bag, such as a foam-like material, and expansion of the bag causes the bag to descend downwardly from the first horizontal brace member. The bag fills with distensible material in response to a stimulus detected by a monitor associated with the containers which contain the distensible material. A closeable opening or flap is disposed in the bag to allow passage of people or equipment therethrough. The expandable barrier may also be oriented in a horizontal position for use in vertical shafts.

Abstract: A transport unit for transporting fire fighting hoses, explosive materials, equipment or other items, the unit having a projectile launcher including a pressure tank providing a compressed gas chamber, and a projectile barrel mounted on the tank in fluid communication with the interior of the tank, a projectile positioned in the barrel, a hose or other line connected at one end to the projectile launcher and adapted for connection at its other end to the projectile, the line being adapted for connection to a pressurized fire fighting or explosive fluid source, or the line being comprised of an explosive material, the compressed gas chamber adapted to provide launching force to the projectile upon actuation of the launcher.

Abstract: The present invention features a chimney fire safety device that attacks a chimney fire by a multi-stage application of flame extinguishing compounds. The extinguishing compounds are disposed in a nested envelope, one-within-the-other. Each compound mass is enclosed in a fusible, time-release membrane, and the encased compounds are nested within each other, such that the fire extinguishing applications are sequentially applied one after the other at ever closer positions relative to the source of the fire. The compound mass rests upon, or is confined by, a platform at the top of a chimney or wood burning stove flue. The platform is designed to collapse, thus dropping the chemicals upon the fire. A fusible link melts under the higher temperature of an uncontrolled fire, thus collapsing the platform and releasing the chemical extinguisher. An alarm or flag warning is also triggered in response to the melting of the fusible link.

Abstract: This invention is relates to a fire extinguishing system which obstructs a fire in a chemical bath containing a flammable chemical arranged within a closed space of high airtightness. The fire extinguishing system includes detecting means which generates a detection signal by detecting flames outbroken on the surface of the chemical, an injection nozzle which jets out a nonflammable gas toward the liquid surface of the chemical in response to the detection signal, an auxiliary bath which temporarily stores the chemical by discharging the chemical from the chemical bath in response to the detection signal, a feed water equipment which supplies water to the auxiliary bath in response to the detection signal to dilute and cool the chemical, a pipeline which discharges the vapor component of the chemical within the chemical bath from the closed space, and an inert gas supplying device which supplies an inert gas in order to dilute the vapor component of the chemical within the auxiliary bath.

Abstract: Suppression apparatus for suppressing detonations in a pipeline which may contain an explosible vapor comprising suppressant discharge units for discharging a suppressant substance into the pipeline within a predetermined operating time. Detectors are positioned upstream of the suppressor means by sufficient distance in relation to the expected speed of travel of the detonation front along the pipeline, and in relation to the predetermined operating time of the suppressant discharge units, that the pipeline in the region of the discharge units will be supplied with an amount of suppressant which is sufficient to ensure that the detonation is suppressed when it reaches the discharge units. The suppressant may be a powder or water. Mechanical arresting means may also be provided such as a valve for positively blocking the pipeline in the event of the detection of a detonation, and/or the pipeline may have a membrane which is ruptured by the detonation so as to vent it to atmosphere.

Abstract: A fire protection apparatus includes spray nozzles oriented specifically adjacent engines associated with transport vehicles. The transport vehicles each include engine conduits for quick coupling to fire extinguishing agent conduits to permit remote coupling to a vehicle directing fire extinguishing agents such as halon gas and carbon dioxide to the engine for extinguishment of an associated fire.

Abstract: A nozzle extends through an opening in the side wall of the vessel of a pressure fryer and normally is disposed in an inactive position in which discharge ports in the nozzle are sealed with respect to and are protected from the contents of the vessel. If a fire occurs, pressurized fire suppressant first extends the nozzle into the interior of the vessel to render ineffective the seal at the discharge ports. The suppressant then sprays through the discharge ports of the extended nozzle to extinguish the fire in the vessel.

Abstract: A fire extinguishing apparatus is connected to the safety valve on an oil flooded rotary compressor to receive the contents expelled by the compressor due to internal combustion in the compressor. The contents are conducted to the fire extinguishing apparatus, which disperses them in a tank holding a quantity of non-combustible liquid sufficient to cool them. The fire extinguishing apparatus has a tank for holding non-combustible liquid, a perforated plate to disperse the burning oil and gases throughout the non-combustible liquid, an opening to allow the escape of excess pressure from the tank, and a spring loaded lid to prevent evaporation of the non-combustible liquid. A pipe connects the fire extinguishing apparatus to a safety valve and the pipe has temperature and pressure switches on its surface which shut down the compressor when the temperature and/or pressure in the pipe exceed preset limits.

Abstract: A method of extinguishing surface fires wherein, alternatively unexpanded, slit sheets of magnesium alloy foil are transported to the site of the fire and expanded while unrolling to provide coverage of the fire by the greatly expanded surface area of the sheets, which may be laid down from an aircraft and which may be made floatable; where applying ellipsoidal balls of the metal nets by means of containers thereof, rupturable by heat of fire, thereby releasing the balls to form a continuous fire extinguishing layer over the fire.

Abstract: A method of extinguishing a fire by generating an intense electric field and/or a gaseous plasma constituted of a body of electrically-charged particles, and directing the electric field and/or plasma to the base of the fire until the fire is extinguished.

Abstract: A fire control system for buildings, wherein the building is provided with a sprinkler system around the perimeter of the building. The sprinkler system sprays water inwardly against the walls, windows and doors of the building.

Abstract: A fire-resistant container such as a courier bag or the like which provides both active and passive protection to its contents to thereby obtain a high degree of fire protection over a long period of time. Passive protection is provided by insulating walls, while active protection is obtained by disposing inside the bag a gas cylinder containing a charge of halogenated hydrocarbon. The gas cylinder is closed with a solder plug whose melting temperature is chosen in accordance with the type of material to be protected.

Abstract: A fire extinguishing system for a Christmas tree including a base defining a water reservoir and having a submersible pump and container holding a fire extinguishing foam material mounted in the reservoir. A venturi block mixes the fire extinguishing foam material with water pumped from the reservoir upon detection of a fire condition by sensors scattered throughout the tree which mixture is discharged through a spray head mounted at the top of the tree. A relay connected to the fire sensors simultaneously closes an electric circuit to the pump and opens an electric circuit to the Christmas tree lights when the fire condition is sensed.

Abstract: A wick operating structure of the lever actuation type for an oil burner capable of finely adjusting the combustion with high accuracy during the combustion operation. The structure includes an operation lever for rotating a wick operating shaft which is provided with a drive pin and a plurality of drive levers pivotally moved independent from one another so as to be accessible to the drive pin. The drive levers are formed with a V-shaped recesses which are different in configuration from one another little by little and in which the drive pin is alternatively fitted to cause the operation lever to be pivotally moved to different positions little by little.

Abstract: To relieve explosive pressures due to unintended explosion of explosive fluid, for example dust or combustible particle-laden air, such as sawdust, coal dust and the like, or of combustible gases, passing through a conveying duct (2, 5), a chamber is formed with a releasable closure, the inlet duct end (2a) from the inlet conveying duct terminating in the chamber. The chamber is formed by a cylindrical wall structure (3a) surrounding the inlet duct end (2a) with clearance. An explosion and/or flame detector (D) is located to sense an incipient explosion or flame and providing an electrical output signal. The chamber is subdivided into chamber portions, one in communication with the inlet duct end and the other communicating with the outlet from the chamber by a rapid-acting separating arrangement.

Abstract: An elevator cab fire extinguishing system is carried by an elevator cab and is arranged to discharge a non-toxic fire extinguishing agent into the interior of the elevator cab in response to a fire in the elevator cab to extinguish the fire quickly and without harm to passengers and property present in the elevator cab, and includes controls responsive to the discharge of the fire extinguishing agent for automatically shutting down the ventilation fan of the elevator cab, sounding an audible alarm, and delivering the elevator cab to a designated egress level in the building within which the elevator cab travels.

Abstract: An automatic mechanical flue fire extinguishing system includes a pressurized container of fire-extinguishing material which communicates with a thermally sensitive valve installed in a flue pipe of a wood stove or the like near the bottom of the flue pipe. When a predetermined temperature is reached, a fusible metal disk within the valve melts, opening the valve and releasing the fire extinguishing material into the flue pipe, thereby extinguishing the flue fire. The fire extinguishing system may also be manually operated.