Abstract: Improvements to a portable fire extinguisher where the improvements relate to a system where the owner of the extinguisher can service and maintain their fire protection. Systems in place today require the servicing of a third party. The service companies (third parties) are charged with maintaining the system. Further Improvements include an anti-bridging mechanism that is articulated from the exterior of the chamber to fluff, mix or stir the powder within the chamber to keep it in a liquefied state. The improvements further include a wall mounting bracket that reduces tampering with the extinguisher, an automatic fluffing motor and manual fluffing wheel with a chuck for use with a drill. These features extend the service intervals while maintaining the fire extinguisher in a ready condition. The fire extinguisher is construction of components that are interchangeable and provide equal operation for left and right handed people.

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: A water column supervisory switch having a probe arrangement and probe circuitry for detecting the presence of a conductive medium that has reached a predetermined level above a clapper valve inside a dry pipe valve for a sprinkler system is disclosed. The probe arrangement comprises a housing and a probe operatively associated with probe circuitry that provides a means for activating an alarm when the conductive medium reaches the predetermined level in order for maintenance personnel to drain the water from the dry pipe valve.

Abstract: Apparatus for remote monitoring of a portable pressurized container, such as the tank of a fire extinguisher, includes a pressure sensor that detects pressure of material contained within a volume defined by the portable container and communications circuitry in communication with the pressure sensor that issues a signal containing information about the pressure detected by the pressure sensor to a remote central station.

Abstract: The invention relates to a fire protection installation (30) comprising a mist sprayer system with at least one nozzle (5, 10) through which extinguishing medium in the form of liquid is arranged to be sprayed out at high pressure, so that a mist is created for achieving fire extinguishing by means of cooling of combustion gases and the seat of the fire. The distinguishing characteristics are that the fire protection installation is portable and has a modular construction comprising a basic system (31) and a number of customized additional systems, which additional systems comprise different additional units that are adapted to a particular function profile that is set in the actual fire protection installation.

Abstract: A fire prevention and extinguishing system and method designed to prevent and automatically extinguish Christmas tree fires. The system preferably includes a case containing a fire extinguisher, controls, a ground fault circuit interrupter (“GFCI”) receptacle, a strobe light and a siren. A cable having heat sensors is connected to the case. The cable has a length sufficient to enable the heat sensors to be positioned throughout the Christmas tree. A hose is connected to the fire extinguisher and includes a portion which is positioned in the tree. The system is powered via 110 vac. Christmas light strings are plugged into the GFCI receptacle which automatically shuts off the power upon detection of an electrical short in the light strings, thereby preventing the occurrence of an electrical fire. Upon the occurrence of a tree fire, the heat sensors immediately detect the fire and activate the automatic fire extinguishing portion of the system.

Abstract: Provided is a portable life protection apparatus comprising: a portable unit; a fire sensor attached to the portable unit; a fire alarm in communication with the fire sensor; a fire retardant material dispenser in communication with the fire sensor; and a reservoir of fire retardant material connected to the fire retardant material dispenser. A corresponding method for protecting life through operation of the life protection apparatus is also provided.

Abstract: This alarm system has a constant source of AC/DC power source from an electrical cable fireproofed [see FIG. 1 & 2] to over 5,000 degrees Fahrenheit, coming off of the main AC supply source between the meter and a DC solenoid cutoff switch [see FIG. 4]. This 12 volt solenoid switch is activated when an alarm, fire sensor [see FIG. 3], and/or a manual over ride is activated. The system can be monitored by others through a computer on the premises or other locations. This alarm system installed with a fireproofed “safe room” to be safe or rescued from and with a constant fireproofed AC power source to operate alarms, safety lights, exhaust fans, and any emergency AC/DC requirements allows the fire zone to be safe to enter with water to fight the fire and give a safe period of time from toxic gases for occupants to safely evacuate the premises.

Abstract: A self-contained automatic fire extinguishing device that is located within a wall or ceiling and housed within the space between two studs or joists. This unit includes a tank or series of tanks attached via flexible pressurized joints, and held in place by an expanding bracket. This fire extinguisher maintains a constantly high pressure inside a shell of the fire extinguisher through out a shelf-life of the fire extinguisher and which can indicate the charge status of the tank via a visible indicator. A sensor is attached to the unit, which reacts to prolonged exposure to direct heat and which can extend a nozzle beyond the wall or ceiling into the living space when actuated. The self-contained automatic fire extinguishing device is hidden behind a decorative face plate which permits the passage of the sensing device and a tank fill status indicator and which actuates out of the path of the nozzle upon activation.

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: The present invention provides apparatus and methods for pro-active, intelligent fire suppression and/or control using a micro-controller that is communicatably connected to at least one fire-energy detection sensor and to at least one fire suppression device. The present invention provides apparatus and methods for sensing the exact direction of a fire as well as a regional location of a fire. The present invention provides apparatus and methods for directing a fire suppressant at the source of the flame. As depicted in FIG. 1a, the present invention provides fine protection apparatus (10) for identifying the existence of a fire hazard and for determining the exact direction and regional location of the file hazard by using multiple infrared (IR) detectors. A first IR detector (20) with a wide angle view of an area of coverage corresponding to an area requiring fire protection will be continuously queried by a micro-controller (100).

Abstract: A universal valve switch for signaling the operative state of a valve assembly is disclosed that is attached to the body of the valve assembly using a bracketing arrangement. The valve switch comprises a housing defining a chamber and an aperture formed through the housing that communicates with the chamber. The valve switch may include a contact arrangement having a spring-loaded plunger that is extendable through the aperture with the plunger being operatively associated with the contact arrangement for selectively transmitting a signal to a remote panel whenever the lever is rotated out of contact with the plunger. In other embodiments, the contact arrangement may be replaced with various types of sensor assembly.

Abstract: A single-piece manifold for use with a residential or other building sprinkler system is disclosed which comprises a body having an inlet in communication with a water supply and an outlet that communicates with a sprinkler system having a conduit adapted for fluid flow formed between the inlet and the outlet. The body includes a main valve that provides a means of manually shutting off communication with the water supply and a combination pressure relief and test valve for draining and testing the sprinkler system. A pair of check valves are positioned across the conduit for preventing fluid flow therethrough when the sprinkler system is inactive with a space being defined between the first and second check valves for communication with a vent passageway. The vent passageway communicates with atmosphere and prevents false alarms due to water surges in the supply line.

Abstract: The invention relates to a carbon dioxide fire extinguishing device comprising a capacitive measuring device (11) which is calibrated for a temperature range above and below the critical temperature of carbon dioxide and which is used to detect the amount of gas loss from a carbon dioxide pressure tank (10). The carbon dioxide fire extinguishing device comprises an outlet valve in which the capacitive measuring probe (12) is integrated in such an advantageous way that the outflow resistance of the extinguishing gas is hardly increased at all.

Abstract: A detection and signaling apparatus is mountable in a fire hydrant to detect a parameter, such as unauthorized movement of a discharge nozzle cap relative to the fire hydrant. A housing carrying a sensor, such as a motion detector, is mounted inside of the cap. The sensor has an output connected to a transmitter. Movement of the cap relative to the fire hydrant activates the motion detector which generates an output signal causing the transmitter to remotely transmit a tamper detection signal and, also, a fire hydrant location identification code. A pressure sensor can also be coupled to the transmitter to sense water supply main pressure and water flow through the fire hydrant.

Abstract: A valve and valve arrangement for a fire suppression system includes a remotely controlled valve such as a solenoid valve which is electrically controlled to provide a preselected flow through the remotely controlled valve corresponding to the flow through a single sprinkler head.

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: An electro-pneumatic actuator having AND gate logic characteristics is disclosed. The actuator has three chambers each divided into two chamber portions by respective flexible diaphragms. One of the diaphragms acts as a valve closing member and controls the flow of a pressurized fluid through the actuator to actuate an associated device when fluid flow is permitted. The other two diaphragms are in mechanical contact with one another and in hydraulic communication with the one diaphragm and thereby control its motion, keeping it normally closed and preventing fluid flow but allowing it to move into an open position permitting fluid flow and actuation of the associated device only when each of the two diaphragms are subject to separate, concurrent drops in pressure which allows both of them to deflect away from the one diaphragm. One of the pressure drops is triggered pneumatically, the other electrically.

Abstract: A method of determining flow through a valve includes determining a first differential pressure across the valve. The valve is bypassed and a second differential pressure is determined across the valve. A flow decision is determined for the valve based on comparison of the first and second differential pressures. A method of testing a relief valve in a reduced pressure backflow preventer assembly includes determining a first differential pressure across an upstream check valve during a no flow condition. The upstream check valve is bypassed for the purpose of opening a relief valve, and a zone vent is opened.

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: An alarm valve system includes a valve body, a valve seat in the valve body with a groove in the sealing face of the seat. A valve element is positioned to seat on the sealing face. A vent extends from the groove in the valve seat to be in communication with a flow alarm and an accumulator alarm. The accumulator alarm includes a cavity with an opening above and a liquid level switch in the cavity. A drain valve is below the cavity.

Abstract: The disclosed invention relates to a process and system for detecting and extinguishing a spark, flame, or fire on a heat sensitive explosive object, which identifies, locates and relays vital information related to the particular endangered explosive object. The invention protects the sensitive objects, regardless of how they are heated. The invention can be used to protect any heat sensitive object from thermal damage, explosive or not. Thermal energy activates a power supply, which powers the system, including a plurality of status sensor circuits that determine the status of the source of thermal energy. Each source of thermal energy may be individually encoded to relay traits specific to the particular hazardous item, such as cook-off rate, type of energetic material and detonation temperature. Data stored in an EEPROM contains various facts regarding the source of thermal energy. Signals from the plurality of circuits and the EEPROM are relayed to an encoder.

Abstract: There is provided an automated fire extinguishing system having a fire extinguisher for extinguishing a fire, the fire extinguisher including fire extinguishing media for extinguishing the fire, an alarm, a heat sensor for sensing heat, whereby when the heat reaches a preset temperature, the heat sensor activates the fire extinguishing system and the alarm, and at least one spray wand fluidly connected to said fire extinguisher, whereby the spray wand delivers the fire extinguishing media to an area in need of same.

Abstract: An air conditioner having functions of fire preventing, smoke exhausting and water spraying includes a sensor for sensing smoke or temperature so as to control operation of a wind-releasing gate, a smoke-exhausting gate, a water-spraying nozzle, and an alarm. When the sensor senses dense smoke or high temperature, smoke is quickly sucked through a wind inlet in an air conditioning box, the smoke-exhausting gate and out of a smoke outlet. At the same time, the water-spraying nozzle is started to spray water and the alarm to give out warning sound, elevating public safety.

Abstract: A single-piece manifold for use with a residential or other building sprinkler system is disclosed which comprises a body having an inlet in communication with a water supply and an outlet that communicates with a sprinkler system having a conduit adapted for fluid flow formed between the inlet and the outlet. The body includes a main valve that provides a means of manually shutting off communication with the water supply and a combination pressure relief and test valve for draining and testing the sprinkler system. A pair of check valves are positioned across the conduit for preventing fluid flow therethrough when the sprinkler system is inactive with a space being defined between the first and second check valves for communication with a vent passageway. The vent passageway communicates with atmosphere and prevents false alarms due to water surges in the supply line.

Abstract: A double check valve assembly having at least one three way valve with a pressure gauge in communication with the double check valve downstream of the second check valve. A flow detection arrangement with a battery powered alarm and automatic dialer and time delay circuit is included with a test and drain valve arrangement provided downstream of the second check valve.

Abstract: Fires in kitchen appliances are detected and controlled by a detection and control system that activates a fire extinguishing system when the fire is detected, terminates the supply of electricity and/or gas to the appliances, and initiates audible and visual alarms. The audible alarm can be terminated, while the visual alarm continues until the system is restored to a pre-detection state. The system includes a control circuit, and a fire detection means with a moveable member that engages a normally closed microswitch in the control circuit to open the control circuit. Relays in the control circuit change state upon opening of the control circuit to de-energize the appliance, and audible and visual alarms are activated. The audible alarm can be manually terminated. However, the visual alarm remains activated until the system is recharged and returned to the ready state.

Abstract: A portable fire extinguisher assembly includes a fire extinguisher with a tank containing fire extinguishing material, a valve for metering release of the fire extinguishing material, and a gauge displaying pressure within the tank, and a docking station in communication with the fire extinguisher. An electronic circuit in communication with the fire extinguisher and the docking station issues a signal upon detection of predetermined conditions, including at least one predetermined internal condition and at least one predetermined external condition.

Abstract: A valve and valve arrangement for a fire suppression system includes a remotely controlled valve such as a solenoid valve which is electrically controlled to provide a preselected flow through the remotely controlled valve corresponding to the flow through a single sprinkler head.

Abstract: A portable fire extinguisher assembly includes a fire extinguisher with a tank containing fire extinguishing material, a valve for metering release of the fire extinguishing material, and a gauge displaying pressure within the tank, and a docking station in communication with the fire extinguisher. An electronic circuit in communication with the fire extinguisher and the docking station issues a signal upon detection of predetermined conditions, including at least one predetermined internal condition and at least one predetermined external condition.

Abstract: A fire extinguishing device for extinguishing a fire from a stationary fire extinguisher. The fire extinguishing device includes a housing having a top wall. A peripheral wall is integrally coupled to and extending downwardly away from the top wall such that the housing has an open bottom side. A canister for disbursing a fire retardant material is securely coupled to an inner surface of the top wall such that a valve mechanically coupled to the canister is directed towards the open bottom side. The canister contains a fire retardant material in a respectively pressurized environment. Control circuitry for actuating the valve is securely coupled to an inner surface of the peripheral wall and is operationally coupled to the valve. A sensor for sensing relatively high heat is electronically coupled to the control circuitry. The sensor is securely attached to the peripheral wall. A plurality of fastening members removably fastens the bottom wall to a ceiling wall.

Abstract: The present invention proposes a voice device for a fire extinguisher. The voice device is installed on a fire extinguisher. The voice device comprises a power source, a control switch, a spring rocking switch, a capacitor, a voice IC, and a sound device. The spring rocking switch is connected to the power source. The voice IC is driven to output a specific signal when the spring rocking switch is on and electricity is conducted. The voice amplifying circuit receives the signal from the voice IC and outputs an amplified signal to the sound device for giving specific voices recorded in the voice IC. When the fire extinguisher is rocked, the voice device will automatically tell the user how to operate the fire extinguisher.

Abstract: Alarms for testing sensors, particularly those used in fire-suppression systems, are described. In one aspect of the invention, the alarm includes an audio and/or a visual indicator operably coupled to the housing of a sensor. The audio indicator may be a speaker that beeps when the sensor is activated. The visual indicator may be one or more LEDs that are illuminated when the sensor is activated. The alarm also can be used to determine whether power and ground conductors extending to the sensor are properly connected. Additionally the alarm can be used to determine whether one or more conductors extending from the sensor to the control panel are properly connected. Certain applications of the invention are intended primarily for use with existing fire-suppression-systems. The invention also can be employed in new fire-suppression system installations using a dry-contact circuit embodiment of the invention (FIG. 5).

Abstract: A pressure indicating system is provided including a housing having an extension mounted thereon adapted for being releasably engaged with a fire extinguisher. Also includes is a battery compartment mounted within the housing for containing at least one battery. Next provided is a pressure gauge adapted for providing an indication of an amount of pressure at which the contents of the fire extinguisher reside. A visual indicator is mounted on the housing. Further, a control driver is adapted to provide an indication of an amount of pressure of the contents within the fire extinguisher by way of the visual indicator.

Abstract: A hazard response structure which includes a sensor mounting housing positioned over and against an aperture of an environmental enclosure to receive pressure from the enclosure and detonate a supply of suppression material to the enclosure upon an increase of pressure therein which is indicative of an impending explosion or fire. The housing is so shaped and the sensors thereof so located to eliminate the possibility of damage thereto or the accumulation of material thereabout to interfere with pressure transmission. At least three sensors are positioned in the housing and provided circuit logic requires a response from two of the three to initiate suppression material delivery to the enclosure. The sensors also provide for setting of operational thresholds without removal of the same from such housing.

Abstract: The system includes a sensor for each junction box in the building to be guarded, e.g., the residence, and a display panel showing the temperature of any junction box that is heated above the danger point. Another display panel shows the name of the resident and address of the residence, and the location of the heated junction box by room number and junction box number and the shape of the junction box. A plurality of residences are connected with a central station, such as a fire station, by a single telephone line to each residence. A single processing unit is located in each residence, and a single such unit is located in the central display station. A display panel is located in the central station identical with each display in a residence.

Abstract: Alarms for testing sensors, particularly those used in fire-suppression systems, are described. In one aspect of the invention, the alarm includes an audio and/or a visual indicator operably coupled to the housing of a sensor. The audio indicator may be a speaker that beeps when the sensor is activated. The visual indicator may be one or more LEDs that are illuminated when the sensor is activated. The alarm also can be used to determine whether power and ground conductors extending to the sensor are properly connected. Additionally, the alarm can be used to determine whether one or more conductors extending from the sensor to the control panel are properly connected.

Abstract: A set of first and second detecting units detects an emergency. First and second pseudo-emergency generating units generate a pseudo-emergency for the first and second detecting units. A driving unit alternately drives the first and second pseudo-emergency generating units. An abnormality detecting unit detects operation of the first and second detecting units detecting the pseudo-emergency from the first and second pseudo-emergency generating units, the abnormality detecting units performing a predetermined indication when thus-detected operation is abnormal. An emergency detection outputting unit, in an emergency, outputs an emergency detection signal in response to reception of emergency detection signals from both the first and second detecting units.

Abstract: A new Building Exterior Fire Prevention System for preventing bush and forest fires from engulfing a building by automatically soaking the building with water after a fire has been detected. The inventive device includes a central processing unit (CPU), a plurality of heat sensors, a solenoid powered control valve connected to a water main, a distribution pipe connected to the control valve and a plurality of sprinklers connected to the distribution pipe. The sprinklers direct water towards the building and towards the ground surrounding the building.

Abstract: The system includes a sensor for each junction box in the building to be guarded, i.e., the residence, and a display panel showing the temperature of any junction box that is heated above the danger point. Another display panel shows the name of the resident and address of the residence, and the location of the heated junction box by room number and junction box number and the shape of the junction box. A plurality of residences are connected with a central station, such as a fire station, by single telephone line to each residence. A single processing unit is located in each residence, and a single such unit in the central display station. A display panel is located in the central station identical with each display in a residence.

Abstract: Methods, circuits, and kits for converting battery powered smoke detectors to AC power include a power converter which converts standard household AC voltage to a DC voltage suitable for use by a battery powered smoke detector and a battery clip connector for connecting the power converter to the battery clips of a battery powered smoke detector. According to one embodiment of the invention, a light emitting diode is coupled to the battery clip connector to indicate the presence or absence of DC voltage at the smoke detector. According to another embodiment of the invention, several battery powered smoke detectors are coupled to a single power converter. In yet another embodiment of the invention, several battery powered smoke detectors are provided with an AC power supply having an automatic battery back-up power supply. Preferred aspects of the invention include: providing the battery backed-up AC power supply with a battery tester and providing fuses for each smoke detector and for the battery.

Abstract: Early fire detection and extinguishment is provided by a plurality of fire etection units, each associated with a localized portion of a protected space and including condition sensors specifically appropriate to the environment of that localized portion of a protected space by a selected combination of condition sensors. A fire alarm annunciator and at least one controlled fire extinguishment system portion, or a stand-alone fire extinguishment system, is provided for each fire detection unit. A central control unit preferably includes a profile detector which evaluates outputs of one or more condition sensors over time to reduce false alarm rates while increasing sensitivity to early stage fires.

Abstract: A backflow prevention and flow detection arrangement is provided by a first and a second check valve with a passageway provided between the check valves. The second check valve may be an alarm valve with an alarm which is sounded when the alarm valve is open. Bypass meter piping is provided to record a flow through the main conduit with the bypass meter piping having a check valve to maintain the integrity of the backflow preventer. Preferably, an inlet of the bypass meter piping is provided in fluid communication with the main conduit between the first and second check valves.

Abstract: The invention herein described relates to devices used to test the integrity of fire sprinkler systems. The present device incorporates a control panel which allows a single operator to electrically activate a test valve within a specific sprinkler network. The interval between the initiation of water flow and the resulting alarm signal is timed by the operator using the control panel. The operator can test any of the building's sprinkler networks simply by adjusting a rotary switch located on the control panel. In this manner, the time and expense associated with sprinkler testing may be greatly reduced by having a single operator perform dependable tests of the entire automatic sprinkler system from one location.

Abstract: A backflow prevention and flow detection arrangement is provided by a first and a second check valve with a passageway provided between the check valves. The second check valve may be an alarm valve with an alarm which is sounded when the alarm valve is open. Bypass meter piping is provided to record a flow through the main conduit with the bypass meter piping having a check valve to maintain the integrity of the backflow preventer. Preferably, an inlet of the bypass meter piping is providing in fluid communication with the main conduit between the first and second check valves.

Abstract: An alarm valve and a backflow preventer are provided by a check valve and an alarm valve with a passageway provided between the check valve and the alarm valve preferably having a relief valve which selectively drains the passageway in response to the pressure in the main conduit upstream of the check valve. An alarm is sounded when the alarm valve is open. An impeller flow sensor may be provided in the backflow prevention device.

Abstract: A mounting plate secures a fire extinguisher canister within a releasable securement strap, wherein the securement strap further includes a flashlight member released upon releasing of the fire extinguisher canister. An audible alarm is cooperative with a flashing light to direct a visual and audible signal in association with a smoke detector circuitry of a dwelling.

Abstract: Fire fighting apparatus has a fire retardant or fire quenching system mounted on a structure operative in response to detection of fire to take water from a reserve supply in the absence of main water line or supply flow or pressure. The reserve supply may be a reservoir such as a pool or it may be unpressurized water in the main water line. Detection is achieved via remote temperature or smoke sensors as examples as well as remote actuators such as telephone or portable signal transmitting units. Power is supplied by battery connection to motors, pump, and relays for oprating the apparatus and valves are selectively disposed in an interconnecting pumping network with the pump and motor to conduct water from the reserve supply.

Abstract: A sprinkler head of the present invention comprises a cover plate which is operated to fall down at a temperature lower than the operating temperature of the sprinkler head body and a switching unit provided on the body side of the sprinkler head so as to detect the falling of the cover plate and send a fire detection signal.A sprinkler head comprises a switching unit provided on the side of the sprinkler head body so as to send a fire detection signal when the unit is operated at a temperature lower than the operating temperature of the sprinkler head and send a sprinkler head operation signal when it is returned to a non-operating state by detection of the firewater discharged by the operation of the sprinkler head after the fire detection signal has been sent.