Abstract: A fire extinguishing assembly includes an ignition unit and an aerosol generating unit. The ignition unit in one embodiment comprises a spring loaded piston that is held under spring tension by a formed eutectic, which deforms at a predetermined temperature. When such temperature is reached, the piston is released, and strikes a primer to ignite a desired pyrotechnic in the aerosol generating unit. In one embodiment, the piston strikes a primer, which ignites an ignition mix, which further ignites the pyrotechnic. The ignition mix may be formed of the same material as the pyrotechnic. The ignition unit may be releasably engaged with the aerosol generating unit that contains the pyrotechnic. In one embodiment, it is formed with threads for mating with threads on the canister.

Abstract: An automatic fire extinguisher that is self-activated in the presence of specified temperature. The fire extinguisher includes a sealed pressure vessel having a fitting and a tube permitting access to the contents of the pressure vessel. A valve in the end of the tube includes a fusible alloy temperature sensor designed to melt or soften in the presence of heat and/or flame. Once the temperature sensor softens or melts, the contents of the pressure vessel are released through the valve thereby extinguishing the fire. A capillary tube is provided to charge the pressure vessel with fire suppressant agent and a pressurized gas.

Abstract: An enhanced protection extended coverage pendent fire protection sprinkler has a body including a fluid passage and an output orifice sealed with a seal cap, two arms extending from the body and meeting at a hub, a release mechanism with a thermally-responsive element positioned between the seal cap and the hub, and a deflector positioned on the hub and facing the output orifice. The deflector includes a pair of aligned slots, aligned with a plane of the arms, and a pair of perpendicular slots, perpendicular to the aligned slots and having a width that is less than that of the aligned slots. The deflector further includes a pair of corner slots, positioned between the aligned slots and the perpendicular slots. Angled slots are positioned between the aligned slots and the corner slots and between the perpendicular slots and the corner slots.

Abstract: An upright fire protection sprinkler having an input orifice at an input end of the sprinkler for receiving fluid and an output orifice at an output end of the sprinkler for outputting fluid. The sprinkler has a connection portion at the input end of the sprinkler and a body extending between the connection portion and the output end. A pair of frame arms extends from the output end and meets at a hub positioned in axial alignment with the output orifice. A deflector is positioned on the hub and is configured to direct fluid output from the output orifice substantially in a direction back toward the output end.

Abstract: A fire extinguishing assembly includes an ignition unit and an aerosol generating unit. The ignition unit in one embodiment comprises a spring loaded piston that is held under spring tension by a formed eutectic, which deforms at a predetermined temperature. When such temperature is reached, the piston is released, and strikes a primer to ignite a desired pyrotechnic in the aerosol generating unit. In one embodiment, the piston strikes a primer, which ignites an ignition mix, which further ignites the pyrotechnic. The ignition mix may be formed of the same material as the pyrotechnic. The ignition unit may be releasably engaged with the aerosol generating unit that contains the pyrotechnic. In one embodiment, it is formed with threads for mating with threads on the canister.

Abstract: An apparatus for remote inspection of fire extinguishers at one or a system of fire extinguisher stations includes, e.g., at each fire extinguisher station: a detector for lack of presence of a fire extinguisher in its installed position at the fire extinguisher station; a detector for out-of-range pressure of contents of the fire extinguisher at the fire extinguisher station; a detector for an obstruction to viewing of or access to the fire extinguisher at the fire extinguisher station; and a device for communication of inspection report information by wireless signal between the fire extinguisher station and a remote central station.

Abstract: Embodiments of the invention provide fire extinguishers for appliances and methods. A fire extinguisher includes a container containing a pressurized fire retardant. A delivery tube is connected to the container and is in fluid communication with the pressurized fire retardant. A fusible tip is disposed at a distal end of the delivery tube that seals the delivery tube. The fusible tip is adapted to release the fire retardant from the container upon melting of the fusible tip when the fusible the tip is exposed to a temperature that exceeds its melting temperature. A pressure-actuated switch may be connected to the container in fluid communication with the pressurized fire retardant. The pressure-activated switch is adapted to shut down an appliance in which the distal end is disposed when the pressure within the container drops below a predetermined value as a result of releasing the fire retardant into the appliance.

Abstract: A portable aerosol fire-extinguisher has an elongate metal casing (3) with a handle (2) and an internal chamber (4) for housing a charge (5) of a solid substance which can be transformed, at a predetermined temperature, into an aerosol with flame-extinguishing properties, and which is delivered through an opening (7). An inflammable charge (13) which can be ignited by means of an activation element (14, 16) is provided for triggering the reaction of the extinguishing charge (5). The activation element can be operated manually in order to produce friction between the inflammable charge (13) and the activation element (14, 16), such as to bring about ignition of the inflammable charge (13).

Abstract: The sprinkler includes the following structural members: a body (1) with a channel for liquid supply, a thermally responsive unit with a valve (4) closing the sprinkler outlet, and a thermally responsive unit attachment. In the first alternative embodiment a sprinkler channel is formed by a segment (10) of a cylindrical configuration connected with a segment (11) made as a conical diffuser. To generate a fine uniform gas-and-drop stream of a high kinetic energy and space-uniform distribution the cylindrical segment (10) length exceeds the channel diameter at this segment. The segment (11) length in the form of conical diffuser exceeds the channel diameter at the cylindrical segment (10). In the second alternative embodiment the sprinkler has two coaxial liquid supply channels. The length of the axial cylindrical channel exceeds its diameter. The second annular channel is coaxial to the first channel and fitted with helical guide components.

Abstract: A fast response, upright sprinkler head includes a body having a central orifice through which fire extinguishing fluid is expelled through an outlet end. A yoke, attached to the exterior surface of the sprinkler body, extends beyond the outlet end of the sprinkler body and is connected at its apex to a deflector. A fusible trigger assembly is coupled to the yoke and the outlet end of the sprinkler head. The deflector is formed with a planar member having a skirt depending therefrom and an annular ledge extending horizontally from the skirt. The skirt depends from the planar member in an outward direction at a pre-selected angle from the vertical, and is formed with a plurality of through-holes. The fast response upright sprinkler head is configured to have a K value of at least 13.5, while the fusible trigger assembly has a fusing temperature between approximately 155° F. and 175° F.

Abstract: A sprinkler comprising a temperature-activated means (1), a housing (2), a central nozzle (4), a side nozzle (5a, 5b), a first channel (9-15-6-12-13) for guiding a medium to the central nozzle, and a second channel (9-15-17-14-7a) for guiding the medium to the side nozzle, the second channel being closed with a spindle means (8) while the sprinkler is in its standby state.

Abstract: The sprinkler includes the following structural members: a body (1) with a channel for liquid supply, a thermally responsive unit with a valve (4) closing the sprinkler outlet, and a thermally responsive unit attachment. In the first alternative embodiment a sprinkler channel is formed by a segment (10) of a cylindrical configuration connected with a segment (11) made as a conical diffuser. To generate a fine uniform gas-and-drop stream of a high kinetic energy and space-uniform distribution the cylindrical segment (10) length exceeds the channel diameter at this segment. The segment (11) length in the form of conical diffuser exceeds the channel diameter at the cylindrical segment (10). In the second alternative embodiment the sprinkler has two coaxial liquid supply channels. The length of the axial cylindrical channel exceeds its diameter. The second annular channel is coaxial to the first channel and fitted with helical guide components.

Abstract: An automatic fire sprinkler device for fluidly connecting to a water system of a fire sprinkler, including: (a) a housing having an inlet for fluidly connecting with the water system, and an outlet for fluidly connecting with a discharge unit having a deflector for dispersing water within a water coverage area; (b) a plug, operatively associated with the housing, having a stand-by position and an activated position, such that in the stand-by position, the plug is positioned to obstruct a flow of the water from the water system, and such that in the activated position, the plug is positioned to allow the water to flow from the water system to the discharge unit, and (c) a submerged thermally sensitive element, responsive to a pre-determined temperature and operatively connected to the plug, for triggering the plug into the activated position when a temperature of an environment reaches the pre-determined temperature, so as to allow the water flow.

Abstract: A fire sprinkler formed by an injection molding process is provided comprising a molded plastic body portion made of an injection molded plastic having a substantially hollow central portion for allowing water to pass therethrough, the hollow central portion extending from a distal end to a proximate end of the molded plastic body, a diffuser head portion located in the vicinity of the distal end of the hollow central portion, a sealing member made of an injection molded elastomeric material in proximity to the hollow central portion, and a link portion. When the link reaches a predetermined temperature the link portion is activated to start the flow of water out of the sprinkler.

Abstract: A sprinkler discharges a column of water downwardly onto a deflector that has a plurality of peripheral tines with a respective non-radial tapered notch separating each adjacent pair of tines. Opposed cutouts with tabs in the central portion of the deflector combine with the notches and with depressed peripheral tabs to produce a predetermined spray pattern.

Abstract: A fire suppression system for a substantially enclosed area comprises: a plurality of solid propellant aerosol generators disposed about the enclosed area for exhausting a fire suppressant aerosol that is substantially void of an ozone depleting material into the enclosed area. Each aerosol generator including an ignition element for igniting the solid propellant thereof. Each ignition element of the aerosol generators being coupled to a fire control unit which is operative to ignite the solid propellant of at least one aerosol generator utilizing the ignition element thereof to exhaust fire suppressant aerosol into the enclosed area.

Abstract: A concealed sprinkler head is mounted above the ceiling of a fire protected zone. The sprinkler head includes a housing within which a valve and other operative parts are contained. A decorative cover plate is secured to the housing to conceal the sprinkler head within the ceiling so that none of the operative parts is visible. The cover assembly includes a thin metallic cover plate made of a heat conductive material such as copper, and a metallic skirt including a cylindrical wall threaded on the housing, an annular flange extending outwardly from one end of the cylindrical wall, and a plurality of tabs extending downwardly from the flange. A plurality of heat insulative elements are disposed between the tabs and the cover plate. A metallic layer is attached to the lower surface of each of the insulative elements. A layer of fusible material is disposed between the metallic layer and the cover plate to secure each of the insulative elements to the cover plate through the metallic layer.

Abstract: A horizontal sidewall sprinkler head includes a tubular body with an inlet opening communicated with a source of water and an outlet opening normally closed by a valve member, and a cylindrical frame connected to the body. A deflector is disposed in the frame and is movable between retracted and extended positions. A thermally responsive assembly is mounted to the frame to urge the valve member in sealing engagement with the outlet opening. The thermally responsive assembly is activated to release the valve member when the ambient temperature exceeds a predetermined value. A deflector guide includes a ring movably disposed within the frame, a pair of parallel struts axially extending from the ring, and a pair of parallel stabilizer arms axially extending from the outer periphery of the ring. The stabilizer arms have a proximal end connected to the ring, a distal end and an elongate intermediate portion extending between the two ends. The intermediate portion has an area less than that of the distal end.

Abstract: An air handling luminaire having a light diffuser, louver, or lamp shield made of a flammable material and mounted within a luminaire housing. Integral with the luminaire housing is a heat distortable support clip from which the light diffuser, louver, or lamp shield depends. The luminaire housing also has a ballast channel and at least one reflector mounted therein. The ballast channel and luminaire housing have a plurality of vents and air gaps for fluid communication with an air plenum. The heat distortable support clip non-permanently deforms or distorts when introduced to a predetermined temperature in order to release the lamp shield from the housing and prevent burning thereof.

Abstract: A fire extinguishing and fire retarding method is provided comprising the step of confining a fire extinguishing and fire retarding agent in slurry, liquid or gaseous form within a shell wherein the shell comprises such an agent in solid form. An agent such as ice water, or liquid carbon dioxide is useful when employing the shell as “non-lethal” device. The solid shell is sublimable and will burst upon impact or upon exposure to the environmental conditions at the target site to release the contents of the shell as well as the fragments of the shell onto the target site.

Abstract: An Apparatus for remote inspection of emergency equipment at one or a system of emergency equipment stations includes, e.g., at each emergency equipment station: a detector for detection of the presence of an obstruction to viewing of or access to the emergency equipment station; and an electronic circuit in communication between the detector and a remote central station for issue of a signal to the remote central station upon detection of the obstruction to viewing of or access to the emergency equipment station.

Abstract: A vacuum dry sprinkler system includes a sprinkler head formed with a body having a central orifice through which fire extinguishing fluid is expelled through an outlet end. A yoke, attached to the exterior surface of the sprinkler body, extends beyond the outlet end of the sprinkler body and is connected at its apex to a deflector. A thermally sensitive trigger member is coupled to the yoke and the outlet end of the sprinkler head. The sprinkler body carries an expulsion assembly which includes an expulsion member and a thrust member. In response to a fire, the expulsion member of the expulsion assembly overcomes the vacuum force and expels the sealing assembly out of the outlet end of the sprinkler body, while the thrust member laterally thrusts the sealing member out of the water trajectory path, and thus, prevents the sealing assembly from reseating on the outlet of the sprinkler head.

Abstract: A sprinkler system formed by an injection molding process is provided, as well as a device to install, remove and/or maintain the sprinkler system. The sprinkler system includes a sprinkler having a body portion defining a substantially hollow central portion for allowing water to pass therethrough. The hollow central portion extends from a distal end of the body portion to a proximate end of the body portion. The sprinkler system also includes a housing connected to the sprinkler. The housing includes at least one outer wall and a cover portion transverse with the at least one outer wall which defines an interior space. The sprinkler can be at least partially located within the interior space. Also disclosed is a device for maintaining a sprinkler system.

Abstract: A removable protector for protecting a thermally responsive member of a sprinkler head includes first and second shields each having protective surfaces. The protective surfaces are positioned to protect portions of the thermally responsive members that are exposed to potential contact with objects that are external to the sprinkler head. Each of the shields has a receiving end which slides over the sprinkler head during attachment of the protector. Each of the shields also has a connecting end attached to a cross member which connects the two shields and which provides an appropriate amount of spacing between the shields to permit clearance for accommodating various sprinkler head components when the protector is attached to the sprinkler head. A releasable fastener attaches the protector to the sprinkler head and secures the major protective surfaces of the first and second shields proximate the exposed portion of the thermally responsive member of the sprinkler head.

Abstract: A system and method for extinguishing or controlling a fire. The system has a source of a substance which is usable to extinguish a fire in a prescribed area, a control system, and an activation system. The control system has (a) a first state in which the substance from the source is prevented from being released to the prescribed area and (b) a second state wherein the substance from the source is permitted to be released to the prescribed area to extinguish or control a fire at or adjacent to the prescribed area. The activation system has a first ignition element which ignites in response to exposure to at least one of (a) a flame, (b) heat above a predetermined temperature, and (c) a product of combustion. The control system is changeable from the first state into the second state an incident of the first ignition element being ignited.

Abstract: A fast response, upright sprinkler head includes a body having a central orifice through which fire extinguishing fluid is expelled through an outlet end. A yoke, attached to the exterior surface of the sprinkler body, extends beyond the outlet end of the sprinkler body and is connected at its apex to a deflector. A fusible trigger assembly is coupled to the yoke and the outlet end of the sprinkler head. The deflector is formed with a planar member having a skirt depending therefrom and an annular ledge extending horizontally from the skirt. The skirt depends from the planar member in an outward direction at a pre-selected angle from the vertical, and is formed with a plurality of through-holes. The fast response upright sprinkler head is configured to have a K value of at least 13.5, while the fusible trigger assembly has a fusing temperature between approximately 155° F. and 175° F.

Abstract: An apparatus for remote inspection of fire extinguishers at one or a system of fire extinguisher stations includes, e.g., at each fire extinguisher station: a detector for lack of presence of a fire extinguisher in its installed position at the fire extinguisher station; a detector for out-of-range pressure of contents of the fire extinguisher at the fire extinguisher station; a detector for an obstruction to viewing of or access to the fire extinguisher at the fire extinguisher station; and a device for transmission of inspection report information from the fire extinguisher station to a remote central station.

Abstract: The sprinkler arrangements described in the specification include a sprinkler body with an axial passage and an axially movable assembly movable between a sealing position and an open position and including a Belleville washer engageable with a shoulder in the sprinkler body to seal the axial passage in the sealing position and a deflector to distribute water emerging from the passage when the movable assembly is in the open position. A locking assembly which is separable from the sprinkler body normally retains the axially movable assembly in the sealing position and is releasable by a temperature sensitive apparatus at an elevated temperature to permit the movable assembly to move to the open position. In one embodiment the axially movable member has a central post which is slidably guided by a tripod at the outer end of the axial passage.

Abstract: A vacuum dry sprinkler system includes a sprinkler head formed with a body having a central orifice through which fire extinguishing fluid is expelled through an outlet end. A yoke, attached to the exterior surface of the sprinkler body, extends beyond the outlet end of the sprinkler body and is connected at its apex to a deflector. A thermally sensitive trigger member is coupled to the yoke and the outlet end of the sprinkler head. The sprinkler body carries an expulsion assembly which includes an expulsion member and a thrust member. In response to a fire, the expulsion member of the expulsion assembly overcomes the vacuum force and expels the sealing assembly out of the outlet end of the sprinkler body, while the thrust member laterally thrusts the sealing member out of the water trajectory path, and thus, prevents the sealing assembly from reseating on the outlet of the sprinkler head.

Abstract: A sprinkler cover assembly includes a polymeric sprinkler housing which is configured to receive a sprinkler head. The sprinkler cover assembly also includes a polymeric cover for covering an open end of the polymeric sprinkler housing. Moreover, the sprinkler cover assembly includes a thermoreactive adhesive disposed between the polymeric sprinkler housing and the polymeric cover so as to secure the polymeric cover to the polymeric sprinkler housing.

Abstract: In the typical embodiments described in the specification, a sprinkler arrangement for protecting stored documents has a sprinkler body with an orifice providing a K factor in the range from about 1.1 to about 2.7, a pair of frame arms terminating in a boss from which a glass bulb supports a cap in position to seal the orifice in the passage, and a pair of closely spaced substantially planar deflector members having a peripheral edge spacing in a range from about 0.01 inch to about 0.60 inch. The deflector member closer to the axial passage has a plurality of slots permitting some water to pass into the space between the deflector members where it generates a very fine droplet mist and some water to be distributed outwardly in the form of fine droplets to carry the mist away from the sprinkler. A recess formed in the surface of the second deflector member facing the first deflector member provides a cavity which promotes atomization and generates turbulence.

Abstract: In the fire protection sprinkler arrangement described in the specification, a VELO ECOH has a sprinkler body with an axial passage for delivery of water and a deflector supported from the sprinkler body by a pair of frame arms. The deflector has a substantially planar central region and a peripheral portion bent toward the sprinkler body along a circular bend line at an angle of about 45° from the plane of the central region. The perimeter of the deflector has four arcuate segments disposed at 90° angles and four substantially straight line segments interposed between the arcuate segments and includes twelve slots extending inwardly from the perimeter. The slots adjacent to the arcuate segments extend approximately parallel to perpendicular axial planes intersecting those segments and the other slots extend radially inwardly from locations centered in the substantially straight line segments of the periphery.

Abstract: A sprinkler head includes a body having one end adapted for connection to a supply of pressurized fluid and the other end closed by a valve element, and a thermally responsive assembly for normally holding the valve element in a closed position and opening the valve element at a preset temperature to cause the pressurized fluid to flow out of the other end of the body. The thermally responsive assembly includes a holder and a fusible alloy contained within the holder and held in place by a plunger. The fusible alloy is free of lead and/or cadmium and includes at least two materials selected from the group consisting of tin, bismuth, indium, zinc, gallium and silver.

Abstract: An electrical thermal glass ampoule for fire fighting sprinkler is disclosed. The ampoule(200) according to the present invention comprises a closed hollow cylindrical glass casing(100), an electrically heating coil(120) installed inside of said glass casing, a negative electrode(140) provided on outer surface at bottom end of said casing and electrically connected with one end of said coil, a positive electrode(142) provided on outer surface at side wall of said casing and electrically connected with the other end of said coil, and heat expansive gas(G) entrapped inside the casing. The glass ampoule(200) can be precisely manufactured as a single body integrated with a thermal coil(120) inside of the casing, have good install handiness due to no necessity of coil being wound around the ampoule and has long term duration because the coil(120) is installed inside the glass casing(100) and, thus can be prevented from corrosion.

Abstract: An automatic flush sprinkler side wall sprinkler assembly includes a sprinkler body, a deflector, a closure member, and a trigger assembly. The deflector is movably mounted to the sprinkler body between a retracted position wherein at least a portion of the deflector is recessed within a cavity of the sprinkler head body and an extended position wherein the deflector is spaced from an outlet opening of the sprinkler head body for dispersing pressurized fluid which flows from the outlet opening. The deflector includes at least two horizontal deflecting surfaces which are positioned spaced from and generally parallel to a direction of flow of the fluid from the outlet opening for directing the flow of fluid outwardly and downwardly from the sprinkler assembly and, further, are provided on a common side and spaced from a central axis of the deflector. The closure member is positioned between the deflector and the outlet opening for sealing the outlet opening.

Abstract: A sprinkler apparatus is provided. The apparatus comprises a sprinkler head and a sprinkler head controller. The sprinkler head has a heater and a thermal fuse, the heater is configured to generate first and second heat based on first and second currents. The thermal fuse melts by the second heat, and the sprinkler head is configured to discharge an extinguishing liquid therethrough in response to the melting of the thermal fuse. The sprinkler head controller is connected to the sprinkler head, and is configured to provide the first current to the heater and detect the amount of current flowing through the heater, and diagnose the status of the sprinkler head based on the detected current.

Abstract: The invention relates to a sprinkler comprising a holder body (3), at least one nozzle (2), a heat-activated release means (18) and a cover (13) which in a protective position is arranged in front of said nozzle when the sprinkler is in an inactive mode, the sprinkler comprising means (6, 10) for providing a displacement of the cover from the protective position to a free position in which the cover keeps clear of the nozzle so that it can spray extinguishing medium when the sprinkler is in an active mode, the holder body comprising an inlet (5) for incoming extinguishing medium.

Abstract: The invention relates to a spray head comprising a holder body (3′), at least one nozzle (2′, 2c′) and a cover (13′) which in a protective position is arranged in front of said nozzle when the spray head is in an inactive mode, the spray head comprising means (6′, 10′) for providing a displacement of the cover from the protective position to a free position in which the cover keeps clear of the nozzle so that it can spray extinguishing medium when the spray head is in an active mode, the holder body comprising an inlet (5′) for incoming extinguishing medium.

Abstract: A shutter mechanism for rack mounted chassis systems, comprising a first apertured shutter and a second apertured shutter, the first apertured shutter having a plurality of first holes formed therein in a first pattern, the second apertured shutter having a plurality of second holes formed therein in a second pattern, the first holes and the first pattern being configured relative to the second holes and the second pattern such that the shutters are positionable in a non-aligned position blocking air flow therethrough and in an aligned position allowing air flow therethrough, the shutters being movable to the non-aligned position when exposed to a temperature above a predetermined amount and means for positioning the first apertured shutter adjacent to the second apertured shutter allowing relative slidable movement thereof.

Abstract: A fluid pressure and heat sensitive valve connected with a flow line includes a collapsible pin, normally maintaining the valve closed, which collapses to open the valve in response to fluid pressure above a predetermined limit and includes a fusible plug which melts in the event of a fire, releasing the pin to allow fluid pressure to open the valve.

Abstract: A fluid pressure and heat sensitive flow control valve interposed in a flow line includes a collapsible pin, normally maintaining the valve open, which collapses to close the valve in response to fluid pressure above a predetermined limit and includes a fusible plug which melts in event of a fire, releasing the pin to allow fluid pressure to close the valve.

Abstract: A system for at least partially decontaminating personnel in response to detection of an agent harmful to human life such as a chemical or biological agent. The system can provide a sprinkler head above a walkway such as a hallway through which personnel are expected to walk. The sprinkler can provide a spray of decontamination fluid such as gas or liquid over personnel passing underneath, removing or neutralizing at least some of the harmful agent and reducing the transport of the agent from one area to another. Preferably, the system includes a sprinkler or shower head coupled to an existing fire isle control sprinkler supply pipe, wherein the sprinkler head may include a valve that is remotely controlled and can be opened in response to detection of a chemical or biological agent.

Abstract: The invention relates to an installation for extinguishing fire, the installation comprising a number of spray heads (330a, 380a), a pipe system (381) for leading extinguishing medium to the spray heads, which spray heads comprise a holder body having an inlet for incoming extinguishing medium and at least one nozzle.

Abstract: Two embodiments of a swing-down type fire extinguisher are disclosed. In one embodiment, a single unit can extinguish either or both of two fires on a stove having front and back burners. This is accomplished by dispensing fire suppressant material toward both burners in the initial motion of swinging down upon activation by a fire and continuing with a pendulum action designed to distribute material to both the front burner and a back burner aligned in the direction of swinging. In a second embodiment, a single unit is provided for each burner. It is operated in two stages, first to respond to a fire or flame by unlatching the extinguisher to release from a horizontal inoperative or “at rest” position and enabling it to swing down to a fire extinguishing position directly over the pan with the burning grease.

Abstract: In the particular embodiment disclosed in the specification, a sprinkler has a sprinkler body with a passage having an orifice providing a K factor of about 3 to 6 which is normally closed by a cap retained in position by a glass bulb thermally responsive element. A deflector spaced from the orifice and supported from the sprinkler body by a pair of frame arms has a circumferential array of tines separated by radial slot-like openings and two openings located in the plane in the frame arms have a length greater than that of the other slot-like openings while four openings located at 45° to the plane of the frame arms are shorter than the other openings. The openings in the plane of the frame arms have a width of about 25% to 75% of the width of the frame arms adjacent to the deflector and a root diameter of about 150% to 300% of the width of the frame arms adjacent to the deflector.

Abstract: The invention relates to a sprinkler or a spray head comprising a housing (2), an inlet (3), a nozzle (4) mounted in the housing, a passage (17-18-13) from the inlet to the nozzle, and a holder (8) for a release means, the holder being mounted in front of the nozzle so that it prevents the nozzle from spraying extinguishing medium forward without hindrance, the nozzle being arranged to spray extinguishing medium once the release means has been released. The holder (8) is mounted in the housing (2) by means of a locking mechanism, which is arranged to open and release the holder (8) from the housing once the release means (7) has been released.

Abstract: A combined trigger and concealing device for an automatic sprinkler head comprises a first plate attached to a second plate by a heat fusible material in a partially overlapping manner. Each plate is formed with an aperture which receives an actuator depending from the bottom of the sprinkler head. The trigger device depends a preselected distance from the bottom of the sprinkler head body and has an outer dimension which causes the trigger device to conceal the internal components of the sprinkler head from view. An annulus defined between the periphery of the device and the bottom of the sprinkler head permits heat energy to be received by the inner surface of the trigger device. Conduction of heat energy from both the inner and outer surface of the trigger device permits the heat fusible material to be expeditiously raised to the preselected separation temperature. This uniform thermal conduction minimizes the response time of the automatic sprinkler head while maintaining a highly aesthetic appearance.

Abstract: A fire extinguisher which maintains a constantly high pressure inside a shell of the fire extinguisher through out a shelf-life of the fire extinguisher comprising an ejection chamber having internal threads at its lower edge and a shell having external threads at its upper edge to mate tightly with internal threads of ejection chamber where shell contains fire extinguishing agent in an absolutely closed system, and where there is a pressing element presses on top of a plate fillet welded to an inner lower wall of the ejection chamber. Upon destroying pressing element, pressure inside shell causes a hole being formed in said plate allowing ejection of fire extinguishing agent to put out fire.

Abstract: A fire prevention device that allows a fire prevention fluid obtained from a fluid source to flow therethrough when subject to a melting temperature includes a housing having a fluid inlet and a fluid outlet. A conduit is disposed between the fluid inlet and the fluid outlet, and a meltable material is disposed within the conduit. The meltable material sufficiently melts when subject to a temperature of at least the melting point of the meltable materials so that the fluid can exit via the conduit through the fluid outlet.

Abstract: A fire safety device for controlling the spread of fire in a structure. The invention comprises a base plate, a smoke detector, a syringe, and a cover. The syringe has a reservoir containing a fire retardant chemical. A fuse link holder has a melting fuse link that maintains a plunger assembly in position, and a spring is loaded behind the plunger. The syringe also has a nozzle in open communication with a supply line, which is in open communication to the reservoir. When a sufficiently high ambient temperature is reached, the fuse link melts, releasing the piston rod from the fuse link and allowing the coil spring to urge the plunger toward the other end of the syringe, and forcing the fire-retardant chemical from the nozzle. When smoke is present, the smoke detector sounds an audible alarm.