Abstract: Silent responder fire fighting systems comprises a method and apparatus for suppressing and combating a fire. In one embodiment, a silent responder projectile may be launched from either a short-range gun or a long-range rifle into a fire from a distance. In an alternative embodiment, silent responder fire fighting system may take the form of a hand grenade and may be activated and thrown strategically into a fire. The silent responder projectile of the present invention may comprise an exterior housing having a bullet-shape and comprising a heat-resistant, non-ferrous material such as aluminum. The inside of the silent responder projectile comprises a first ignition assembly, a second ignition assembly, and a potassium-based compound for suppressing a fire. In use, the first ignition assembly is activated upon firing the silent responder projectile from a projectile launcher. A time delay of about 5 seconds occurs before the first ignition assembly triggers the second ignition assembly.

Abstract: Manually activated, portable aerosol fire extinguisher includes a casing having discharge ports, an arrangement for generating fire suppression agent which is discharged through the discharge ports, and a manual activation system which enables manual activation of the generating arrangement at a safe location a distance from the fire. The activation system includes a firing pin which causes ignition of igniter material upon contact therewith (resulting in generation of the fire suppression agent), a handle which normally prevents the firing pin from contacting the igniter material and a manually releasable pull pin arranged to maintain the handle in a position preventing the firing pin from contacting the igniter material. Upon release of the pull pin, the handle is urged out of this position with the result that the firing pin contacts the igniter material, thereby causing generation of the fire suppression agent.

Abstract: Manually activated, portable aerosol fire extinguisher includes a casing having an outer circumferential surface, the casing having a plurality of discharge ports disposed in the outer circumferential surface. The extinguisher also includes an arrangement for generating fire suppression agent which is discharged through the discharge ports, and a manual activation system which enables manual activation of the generating arrangement at a safe location a distance from the fire. The activation system includes a firing pin which causes ignition of igniter material upon contact therewith (resulting in generation of the fire suppression agent), a handle which normally prevents the firing pin from contacting the igniter material and a manually releasable pull pin arranged to maintain the handle in a position preventing the firing pin from contacting the igniter material.

Abstract: Tunnel fire protection system for isolating and suppressing fires in a tunnel includes a fire detecting arrangement arranged in the tunnel for detecting a fire, curtain assemblies spaced apart from one another in an axial direction of the tunnel to partition it into zones and a control unit coupled to the fire detecting arrangement and the curtain assemblies for directing the release of curtains from the curtain assemblies based on the detection of a fire. In this manner, a tunnel fire can be isolated in a zone between a pair of barriers formed by the curtains upon their release. To suppress the fire, fire extinguisher units are arranged on the tunnel walls, with at least one in each zone, and those in the zone in which the fire is detected are activated by the control unit. The fire extinguisher units may be aerosol-type fire extinguishers.