WO1995011412A1 - Gas detecting-extracting device - Google Patents

Gas detecting-extracting device Download PDF

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Publication number
WO1995011412A1
WO1995011412A1 PCT/ES1994/000100 ES9400100W WO9511412A1 WO 1995011412 A1 WO1995011412 A1 WO 1995011412A1 ES 9400100 W ES9400100 W ES 9400100W WO 9511412 A1 WO9511412 A1 WO 9511412A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
extractor
detection
gases
fan
Prior art date
Application number
PCT/ES1994/000100
Other languages
Spanish (es)
French (fr)
Inventor
Manuel Sierra Medina
Original Assignee
Manuel Sierra Medina
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manuel Sierra Medina filed Critical Manuel Sierra Medina
Publication of WO1995011412A1 publication Critical patent/WO1995011412A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B29/00—Devices, e.g. installations, for rendering harmless or for keeping off harmful chemical agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/70—Carbon dioxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/72—Carbon monoxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention that is the object of the Utility Model whose registration is now requested, as it appears from its own title, is a device that has been conceived by the inventor of the same suitably equipped with the novel functionality and the advantage practically appreciable for its use, that any Utility Model must have the effect that it can achieve its intended registration, as required by article 143 of the current Law 11/1986, of March 20, on Patents, which warns of the presence of leaks or accumulations of gas that may occur in kitchens of homes, bars, warehouses and any other type of enclosed premises and, as a result of this detection, highlights that situation through the appropriate audio-visual alarms and, at the same time, proceeds to the immediate evacuation to the outside of the gas in question that has been located by activating the extractor that has been incorporated and that, until the gas leak has not been completely corrected, it does not cease to function, even in the event of a general cut in the electricity supply, since it has been provided with alternative conventional means that in such cases provide energy to continue developing autonomously its intended functionality as a security device.
  • safety devices that have the dual function of detecting the existence of gas by means of the appropriate sensors are known and call the attention of the persons in the inside the premises where the gas leak has been located, or, failing that, warn those who may be in the in the immediate vicinity of that place, in order to try to solve this risk situation and restore it to normal.
  • the gas detector in question has been activated upon warning of the gas and consequently its corresponding alarms have also been put into operation, but with this its ultimate and primary function is not achieved, which it really is the only one that is of interest, is that people who are in the home or premises may have knowledge of the risk and danger arising from the accumulation of gas in the place where it has been detected and consequently immediately adopt the necessary measures to enervate that risk, proceeding to open windows and doors, as well as to try to locate the origin of the gas leak and if possible try to eliminate it by closing the appropriate keys of the gas installation, since in such cases it is evident that there is no person in The interior of the gas-saturated premises that can carry out this activity and the people nearby, usually neighbors or the doorman of the property, may not have the means to access the interior of the house and act accordingly, waiting for the arrival of the authorities, firefighters, etc., thus running the serious risk that, meanwhile, occurs at any time he is carving of the gas.
  • the front face of the device is proposed with a fence or bezel for adaptation therein of a rubber ring intended to protect and provide adequate sealing to the device.
  • a fence or bezel for adaptation therein of a rubber ring intended to protect and provide adequate sealing to the device.
  • showing the front face on its major functional surface the variable combination in shapes, sizes and concrete arrangements of the sensor grid for the detection of gas, the sound output for the alarm or acoustic sneak, the light alarm and, occupying the most of this surface, the housing in this case of circular section of the gas extractor, which is passed through the apparatus so that the function of expulsion of the gas can be exercised where appropriate.
  • Figure 1 shows a perspective view of the outer surface of the front face of the gas detector-extractor now recommended in this Utility Model.
  • Figure 2 also shows in perspective the inside of the back of the device that occupies us.
  • the basic plate of the front face of the recommended device can be seen, on whose surface the various elements that functionally configure the gas detector-extractor that now occupies us are distributed, such as the extractor 1 of the gases that are detected, the screws 2 fixing each other of the faces that configure this device, the light sneak 3, the alarm or acoustic sneak 4 and the gas detection sensor 5.

Abstract

Gas detecting-extracting device which, in comparison with known prior art apparatuses of security devices, has the advantage that, at the same time as it detects the presence of gases inside a closed space and signals said presence by means of visual and sound alarms, it eliminates simultaneously said gases by expelling them to the outside, said detection-extraction device being characterized by a rectangular prismatic structure formed by assembling by conventional means a front structure and a back structure at the periphery thereof and being sealingly adjusted by means of a rubber ring fitted to a hoop whose front face presents a sensor grid (5) for the detection of gas effluxions, and, due to the presence of the fluid, activates simultaneously the acoustic alarm (4), the light alarm (3) and the extractor (1) (fan) in order to expell the gas to the outside, the fan being provided with a large circular through housing.

Description

"DETECTOR-EXTRACTOR DE GASES". - "GAS DETECTOR-EXTRACTOR". -
La invención que es objeto del Modelo de Utilidad cuyo registro ahora se solicita, según se desprende de su propio título, se trata de un dispositivo que ha sido concebido por el inventor del mismo adecuadamente dotado de la novedosa funcionalidad y de la ventaja prácticamente apreciable para su uso, que todo Modelo de Utilidad debe comportar al efecto de que pueda alcanzar su pretendida inscripción registral, conforme asi exige el articulo 143 de la vigente Ley 11/1986, de 20 de Marzo, de Patentes, consistente en que advierte de la presencia de escapes o acumulaciones de gas que puedan producirse en cocinas de viviendas, bares, almacenes y cualquier otro tipo de local cerrado y, como consecuencia de esa detección, pone de manifiesto esa situación mediante las oportunas alarmas audio-visuales y, al mismo tiempo, procede a la inmediata evacuación al exterior del gas en cuestión que ha sido localizado mediante la activación del extractor que lleva incorporado y que, hasta tanto el escapis de gas no ha sido corregido por completo, no cesa de funcionar, incluso en la eventualidad de un corte general en el suministro de energía eléctrica, ya que ha sido dotado de medios convencionales alternativos que en tales casos le proporcionan energía para proseguir desarrollando de modo autónomo su prevista funcionalidad como dispositivo de seguridad.The invention that is the object of the Utility Model whose registration is now requested, as it appears from its own title, is a device that has been conceived by the inventor of the same suitably equipped with the novel functionality and the advantage practically appreciable for its use, that any Utility Model must have the effect that it can achieve its intended registration, as required by article 143 of the current Law 11/1986, of March 20, on Patents, which warns of the presence of leaks or accumulations of gas that may occur in kitchens of homes, bars, warehouses and any other type of enclosed premises and, as a result of this detection, highlights that situation through the appropriate audio-visual alarms and, at the same time, proceeds to the immediate evacuation to the outside of the gas in question that has been located by activating the extractor that has been incorporated and that, until the gas leak has not been completely corrected, it does not cease to function, even in the event of a general cut in the electricity supply, since it has been provided with alternative conventional means that in such cases provide energy to continue developing autonomously its intended functionality as a security device.
En el sector de la técnica en el que se inserta la presente invención son conocidos los aparatos de seguridad que ejercen la doble función de detectar la existencia de gas mediante los oportunos sensores y de llamar al respecto la atención de las personas que se encuentren en el interior del local donde ha sido localizado el escape de gas, o bien, en su defecto, advertir a quienes puedan encontrarse en las inmediaciones de ese lugar, con el fin de que intenten actuar para solucionar esa situación de riesgo y restablecerla a la normalidad.In the field of the technique in which the present invention is inserted, safety devices that have the dual function of detecting the existence of gas by means of the appropriate sensors are known and call the attention of the persons in the inside the premises where the gas leak has been located, or, failing that, warn those who may be in the in the immediate vicinity of that place, in order to try to solve this risk situation and restore it to normal.
Para ello, los dispositivos conocidos hasta la fecha, y que conforman el estado de la técnica en el que se circunscribe el Modelo de Utilidad que ahora nos ocupa, comportan para la detección de la presencia de indeseadas acumulaciones de gas, las cuales generan un grave riesgo de explosión, un comentado sensor convencional que, al activarse por la apreciación de la existencia del gas, pone de inmediato en funcionamiento las alarmas con las que se encuentre conectado, las cuales pueden ser de cualquier tipo, tanto acústicas, como incluso visuales, adecuadas estas últimas para ser advertidas por personas con problemas en su capacidad auditiva.For this, the devices known to date, and that make up the state of the art in which the Utility Model that now occupies us is circumscribed, involve the detection of the presence of unwanted gas accumulations, which generate a serious risk of explosion, a commented conventional sensor that, when activated by the appreciation of the existence of the gas, immediately puts into operation the alarms with which it is connected, which can be of any type, both acoustic and even visual, adequate the latter to be warned by people with problems in their hearing.
El problema que todavía no ha llegado a ser resuelto por ninguno de los dispositivos de seguridad para detección de gas conocidos en el estado de la técnica, según así le consta al inventor y solicitante de este Modelo de Utilidad que desde hace varios años viene preocupándose por este tema, reside en la situación que se produce en los casos en que estos aparatos se encuentran instalados en viviendas o locales que están cerrados y deshabitados en el momento en que la presencia del gas es efectivamente detectada y las correspondientes alarmas para anunciarlo han saltado poniéndose en funcionamiento y advirtiendo así debidamente de esa situación a las personas que puedan encontrarse en los alrededores.The problem that has not yet been solved by any of the gas detection safety devices known in the state of the art, as the inventor and applicant of this Utility Model has been aware of that for several years has been worrying about This issue resides in the situation that occurs in cases where these devices are installed in homes or premises that are closed and uninhabited at the moment when the presence of the gas is effectively detected and the corresponding alarms to announce it have jumped. in operation and thus duly warning of this situation to people who may be in the vicinity.
Como puede apreciarse, en las comentadas circunstancias, el detector de gas de que se trate ha llegado a activarse al advertir el gas y consecuentemente sus correspondientes alarmas han sido también puestas en funcionamiento, pero con ello no se logra su función última y primordial, que en realidad es la única que interesa, consistente en que las personas que se encuentran en la vivienda o local puedan tener conocimiento del riesgo y el peligro derivado de la acumulación de gas en el lugar donde ha sido detectado y consecuentemente adopten de inmediato las medidas necesarias para enervar ese riesgo, procediendo a abrir ventanas y puertas, así como también a intentar localizar el origen del escape de gas y si es posible procurar eliminarlo cerrando las oportunas llaves de la instalación de gas, ya que en tales casos es evidente que no existe persona alguna en el interior del local saturado de gas que pueda desarrollar esa actividad y las personas de las inmediaciones, normalmente vecinos o el portero del inmueble, es posible que no dispongan de los medios para acceder al interior de la vivienda y actuar en consecuencia, debiendo esperarse a la llegada de las autoridades, bomberos, etc., corriendo así el grave riesgo de que, mientras tanto, se produzca en cualquier momento el estallido del gas. El inventor del Modelo de Utilidad que más adelante es objeto de la oportuna reivindicación, ha tomado en consideración el expuesto problema, que hasta el momento no le había sido dada una adecuada solución por los antecedentes que conforman el estado de la técnica, proponiendo para afrontar el descrito tipo de situaciones la idea prácticamente concretada en un dispositivo detector-extractor de gas, que al mismo tiempo que advierte de la indeseada y peligrosa presencia del gas , procede automáticamente a expulsarlo del interior del local en el que representa un grave riesgo de que llegue a explosionar, en virtud de que el aparato ahora preconizado, a diferencia de todos los hasta ahora conocidos, lleva incorporado un extractor del gas que se activa simultáneamente con las alarmas, acústicas o visuales, que revelan la presencia del fluido. Para lograr la expuesta funcionalidad, a modo de ejecución o realización práctica no limitativa en cuanto a tamaños, formas básicas o materiales en que pueda plasmarse la invención que constituye el objeto de este Modelo de Utilidad, que es válido para adaptar todo tipo de detectores o extractores, cualquiera que sea su potencia, existentes en el mercado, el inventor de la misma ha diseñado un cuerpo básico de estructuración general prismático rectangular, configurado por dos caras, frontal y posterior, que se ajustan entre sí por medios convencionales, tales como una pareja de tornillos, cuyas respectivas cabezas enrasan con sus correspondientes superficies externas, cuyas carcasas estructurales incluyen, asimismo, una serie de elementos necesarios para su adaptación a cualquier tipo de lugares en que se pretenda su instalación (pared, cristal, etc . ) .As can be seen, in the aforementioned circumstances, the gas detector in question has been activated upon warning of the gas and consequently its corresponding alarms have also been put into operation, but with this its ultimate and primary function is not achieved, which it really is the only one that is of interest, is that people who are in the home or premises may have knowledge of the risk and danger arising from the accumulation of gas in the place where it has been detected and consequently immediately adopt the necessary measures to enervate that risk, proceeding to open windows and doors, as well as to try to locate the origin of the gas leak and if possible try to eliminate it by closing the appropriate keys of the gas installation, since in such cases it is evident that there is no person in The interior of the gas-saturated premises that can carry out this activity and the people nearby, usually neighbors or the doorman of the property, may not have the means to access the interior of the house and act accordingly, waiting for the arrival of the authorities, firefighters, etc., thus running the serious risk that, meanwhile, occurs at any time he is carving of the gas. The inventor of the Utility Model that is later the subject of the appropriate claim, has taken into consideration the above problem, which until now had not been given an adequate solution due to the background that make up the state of the art, proposing to face the described type of situations the idea practically concretized in a gas detector-extractor device, which at the same time warns of the unwanted and dangerous presence of gas, automatically proceeds to expel it from inside the premises in which it represents a serious risk that It explodes, because the device now recommended, unlike all the previously known, incorporates a gas extractor that is activated simultaneously with alarms, acoustic or visual, which reveal the presence of the fluid. To achieve the exposed functionality, by way of execution or practical implementation, not limited in terms of sizes, basic forms or materials in which the invention that constitutes the object of this Utility Model can be embodied, which is valid to adapt all types of detectors or extractors, whatever their power, existing in the market, the inventor of the same has designed a basic body of rectangular general prismatic structuring, configured by two faces, front and rear, which adjust to each other by conventional means, such as a pair of screws, whose respective heads make up with their corresponding external surfaces, whose structural housings also include a series of elements necessary for their adaptation to any type of places where their installation is intended (wall, glass, etc.).
La cara frontal del dispositivo, coincidente en forma general con la trasera, en la apuntada realización práctica de esta invención se propone dotada de un cerco o bisel para adaptación en el mismo de un anillo de goma previsto para proteger y dotar del adecuado hermetismo al dispositivo, mostrando la cara frontal en su superficie funcional mayor la combinación variable en formas, tamaños y concretas disposiciones de la rejilla del sensor para la detección del gas, la salida de sonido para la alarma o chivato acústico, la alarma de luz y, ocupando la mayor parte de esta superficie, el alojamiento en este caso de sección circular del extractor de gas, que es pasante a través del aparato con el fin de que pueda ejercerse en su caso la función de expulsión del gas.The front face of the device, generally coinciding with the rear, in the pointed practical embodiment of this invention is proposed with a fence or bezel for adaptation therein of a rubber ring intended to protect and provide adequate sealing to the device. , showing the front face on its major functional surface the variable combination in shapes, sizes and concrete arrangements of the sensor grid for the detection of gas, the sound output for the alarm or acoustic sneak, the light alarm and, occupying the most of this surface, the housing in this case of circular section of the gas extractor, which is passed through the apparatus so that the function of expulsion of the gas can be exercised where appropriate.
Para facilitar la comprensión de cuanto queda expuesto, en los adjuntos dibujos, a título de ejemplo y sin alcance limitativo, se representa una forma de ejecución práctica del presente Modelo. En la Figura 1 se contempla una vista en perspectiva de la superficie exterior de la cara frontal del detector-extractor de gases ahora preconizado en el presente Modelo de Utilidad. En la Figura 2 se muestra también en perspectiva la parte interior de la cara posterior del dispositivo que nos o.cupa .To facilitate the understanding of what is exposed, in the attached drawings, by way of example and without limiting scope, a practical form of execution of this Model is represented. Figure 1 shows a perspective view of the outer surface of the front face of the gas detector-extractor now recommended in this Utility Model. Figure 2 also shows in perspective the inside of the back of the device that occupies us.
En todas estas reseñadas Figuras puede apreciarse la placa básica de la cara frontal del dispositivo preconizado, en cuya superficie aparecen distribuidos los diversos elementos que funcionalmente configuran el detector-extractor de gases que ahora nos ocupa, tales como el extractor 1 de los gases que sean detectados, los tornillos 2 de fijación entre sí de las caras que configuran este dispositivo, el chivato luminoso 3, la alarma o chivato acústico 4 y el sensor 5 de detección del gas.In all these figures, the basic plate of the front face of the recommended device can be seen, on whose surface the various elements that functionally configure the gas detector-extractor that now occupies us are distributed, such as the extractor 1 of the gases that are detected, the screws 2 fixing each other of the faces that configure this device, the light sneak 3, the alarm or acoustic sneak 4 and the gas detection sensor 5.
Lo que ha quedado descrito constituye fiel reflejo de la invención que es objeto de este Modelo de Utilidad, sin que meras variaciones formales, circunstanciales y accesorias, tanto en proporciones, como en materiales constitutivos, puedan desvirtuar la esencialidad del mismo que a continuación es reivindicada. What has been described constitutes a faithful reflection of the invention that is the object of this Utility Model, without mere formal, circumstantial and accessory variations, both in proportions, as in constitutive materials, can undermine the essentiality of the same that is claimed below. .

Claims

R E I V I N D I C A C I O N E SR E I V I N D I C A C I O N E S
13.- Detector-extractor de gases, perteneciente al sector de los dispositivos de seguridad, caracterizado por estar configurado por un cuerpo básico de estructuración general prismático rectangular, dividido en dos carcasas o caras frontal y posterior, las cuales se ajustan entre sí por medios convencionales, preferentemente por un conjunto de tornillos 2, que periféricamente están dotadas de un cerco o bisel para adaptación en el mismo de un anillo de goma de protección y hermetismo, mostrando la superficie de la cara frontal la rejilla del sensor o detector de gas 5, que al activarse por la presencia del fluido pone en funcionamiento simultáneamente la alarma o chivato acústico 4, dotada de su correspondiente altavoz para salida del sonido, la alarma visual o luminosa 3 y el extractor de gas 1, cuyo alojamiento pasante de sección circular ocupa la mayor parte de esta superficie frontal del dispositivo. 13.- Detector-extractor of gases, belonging to the sector of safety devices, characterized by being configured by a basic body of rectangular general prismatic structuring, divided into two housings or front and rear faces, which adjust to each other by means conventional, preferably by a set of screws 2, which peripherally are provided with a fence or bevel for adaptation therein of a protective and sealing rubber ring, the surface of the front face showing the grid of the sensor or gas detector 5 , which, when activated by the presence of the fluid, simultaneously activates the acoustic alarm or sneak 4, equipped with its corresponding loudspeaker for sound output, the visual or luminous alarm 3 and the gas extractor 1, whose circular section through housing occupies most of this front surface of the device.
PCT/ES1994/000100 1993-10-18 1994-10-18 Gas detecting-extracting device WO1995011412A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESU9302721 1993-10-18
ES9302721U ES1025981Y (en) 1993-10-18 1993-10-18 DIRECTOR-GAS EXTRACTOR.

Publications (1)

Publication Number Publication Date
WO1995011412A1 true WO1995011412A1 (en) 1995-04-27

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WO (1) WO1995011412A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028577A1 (en) * 1996-12-23 1998-07-02 Manuel Sierra Medina Domestic apparatus for detecting and expulsing gas
GB2358268A (en) * 1999-10-20 2001-07-18 Gary Lewis Safety apparatus providing protection from combustion products
WO2005027070A1 (en) * 2003-09-16 2005-03-24 Lars Svensson A burglary alarm system against gas that intentionaly forced into a vehicle accomodation in order to incapacitate inhabitants
GB2454950A (en) * 2007-11-26 2009-05-27 Martin Edward Norbury Ventilator unit and alarm activated by hazardous gas levels
GB2487212A (en) * 2011-01-13 2012-07-18 Wayne Robertson Fire safety apparatus comprising a combined detector, alarm, and extractor fan

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA953006A (en) * 1971-05-31 1974-08-13 Kenzi Kato Automatic ventilating device
DE2728466A1 (en) * 1977-06-24 1979-01-11 Willi Schaerf Gmbh & Co Kg Dangerous gas measuring system - triggers alarm and fan at specified oxygen level in contaminated air
DE3706894A1 (en) * 1987-03-04 1988-09-15 Stricker Heinz Compact gas warning safety unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA953006A (en) * 1971-05-31 1974-08-13 Kenzi Kato Automatic ventilating device
DE2728466A1 (en) * 1977-06-24 1979-01-11 Willi Schaerf Gmbh & Co Kg Dangerous gas measuring system - triggers alarm and fan at specified oxygen level in contaminated air
DE3706894A1 (en) * 1987-03-04 1988-09-15 Stricker Heinz Compact gas warning safety unit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028577A1 (en) * 1996-12-23 1998-07-02 Manuel Sierra Medina Domestic apparatus for detecting and expulsing gas
GB2358268A (en) * 1999-10-20 2001-07-18 Gary Lewis Safety apparatus providing protection from combustion products
GB2358268B (en) * 1999-10-20 2003-10-15 Gary Lewis Safety apparatus
WO2005027070A1 (en) * 2003-09-16 2005-03-24 Lars Svensson A burglary alarm system against gas that intentionaly forced into a vehicle accomodation in order to incapacitate inhabitants
GB2454950A (en) * 2007-11-26 2009-05-27 Martin Edward Norbury Ventilator unit and alarm activated by hazardous gas levels
GB2454950B (en) * 2007-11-26 2011-07-06 Martin Edward Norbury I vent
GB2487212A (en) * 2011-01-13 2012-07-18 Wayne Robertson Fire safety apparatus comprising a combined detector, alarm, and extractor fan

Also Published As

Publication number Publication date
ES1025981Y (en) 1994-08-16
ES1025981U (en) 1994-02-16

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