EP2500639A2 - Détecteur encastré de fumée ou chaleur - Google Patents

Détecteur encastré de fumée ou chaleur Download PDF

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Publication number
EP2500639A2
EP2500639A2 EP12160117A EP12160117A EP2500639A2 EP 2500639 A2 EP2500639 A2 EP 2500639A2 EP 12160117 A EP12160117 A EP 12160117A EP 12160117 A EP12160117 A EP 12160117A EP 2500639 A2 EP2500639 A2 EP 2500639A2
Authority
EP
European Patent Office
Prior art keywords
reflector
detector
recessed
housing
detection sensor
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP12160117A
Other languages
German (de)
English (en)
Other versions
EP2500639A3 (fr
Inventor
Simon Edward Walters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DDC Ltd
Original Assignee
DDC Ltd
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 DDC Ltd filed Critical DDC Ltd
Publication of EP2500639A2 publication Critical patent/EP2500639A2/fr
Publication of EP2500639A3 publication Critical patent/EP2500639A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0064—Health, life-saving or fire-fighting equipment
    • F21V33/0076—Safety or security signalisation, e.g. smoke or burglar alarms, earthquake detectors; Self-defence devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/02—Wall, ceiling, or floor bases; Fixing pendants or arms to the bases
    • F21V21/04—Recessed bases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/02—Wall, ceiling, or floor bases; Fixing pendants or arms to the bases
    • F21V21/04—Recessed bases
    • F21V21/041—Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a recessed smoke or heat detector.
  • recessed smoke detectors are suggested in US-A-5333418 and US-A-2008/210839 . These documents recognise the problem with the surface mounted detectors and provide devices that are hidden from view within the ceiling void. A decorative panel with status LEDs may be the only component of the detector that is visible from below. In the arrangement of US-A-2008/210839 , the recessed smoke detector has a large surface diameter of 5 to 7 inches (about 125-175 mm).
  • JP-A-1019499 describes a recessed light fitting for fluorescent tubes that incorporates a smoke detector in an upper region of the fitting.
  • GB-A-2446430 suggests a recessed fitting that is the same size as a standard recessed 'downlighter' light fitting.
  • the fitting is able to accommodate a variety of electrical fixtures from a downlight to a speaker and a smoke detector.
  • WO-A-2005/124710 describes a smoke detector that is arranged in a housing having a lower body portion that is configured to match the profile of a reflector lamp so that it can be fitted in an existing downlighter fitting.
  • the smoke detector device may still include a lamp in the lower body portion in order to match the working appearance of other downlight fittings installed in the ceiling.
  • a recessed smoke or heat detector for mounting in a ceiling panel, the detector comprising a detection sensor that is mounted within a housing, the housing being configured to be pushed through a hole cut in a ceiling panel to project into a ceiling void above, the housing being open at its lower end to allow smoke and/or heat from a room below to reach the detection sensor in use, wherein the recessed detector further comprises a reflector that extends from the lower end of the housing towards an upper end, the reflector having an internal, light-reflecting surface that converges from an open, lower end towards a top of the reflector, the internal surface of the reflector defining a space into which the detection sensor projects in an upper region of the reflector, the recessed detector further including a light source that is configured to provide emergency lighting, the emergency light source also being mounted to emit light within the reflector at a position where it can generate a concentrated beam of light using the internal, light-reflecting surface of the reflector, to shine into a room below.
  • a significant benefit of the recessed detector of the present invention is that it has a much more attractive appearance than the traditional surface mounted detectors, and in many respects it offers significant technical improvements over the known recessed smoke detector arrangements in the prior art described above.
  • the recessed detector has a separate reflector that is mounted within the housing.
  • the reflector is an existing component from a downlight fitting. It is preferably a parabolic reflector having a focal point close to its upper end.
  • the reflecting surface may be a coating or film of reflective metal such as aluminium or a similar shiny metal or alloy.
  • the reflector may be made of aluminium or other reflective metal to present a shiny interior surface. It may have a smooth interior surface or it may include facets or other light dispersing features in its reflector surface to help spread light by creating different reflections.
  • the benefits of the present invention at least to an extent, can still be achieved using a less sophisticated reflector, for example, a conical or pyramidal reflector, the present invention is not limited just to parabolic reflectors.
  • the reflector itself could provide the housing of the recessed detector, e.g., where it can be made with sufficient strength and fire resistance.
  • the lower end of the reflector is open to the room below. Preferably there is no additional cover of any form on the lower end of the reflector, as this allows for better detection of fire and for better illumination of the room below by the light source.
  • the shiny light-reflecting internal surface of the reflector also adds to the visual appeal and sophistication of the recessed detector.
  • the lower end may be provided with a cover that is transparent to heat (in the case of a heat detector) and is transparent to visible light to emit the emergency lighting.
  • a cover that is transparent to heat (in the case of a heat detector) and is transparent to visible light to emit the emergency lighting.
  • the recessed detector is a heat detector and includes a heat detection sensor.
  • the heat detector is suitable for use as a domestic heat detector and meets the relevant building regulations that apply. It can of course be used in commercial premises too.
  • the reflector acts to focus heat from the room towards the detection sensor, resulting in much earlier detection of fire.
  • parabolic heat collectors are known for scientific instruments, no-one has thought to use a reflector, for example from an existing downlight fitting, as a collector for the heat detection sensor of a domestic heat detector.
  • the reflector is open at its lower end and does not contain additional components, such as a light bulb, between the opening and the heat detection sensor that could interfere with the detection. There is a clear path for heat radiation to reach the detection sensor directly or to be reflected off the internal surface of the reflector onto it. This means that the recessed heat detector is able to offer much more sensitive heat detection than the prior art domestic heat detector devices described above.
  • the recessed detector is a smoke detector and is provided with a smoke detection sensor.
  • the smoke detector is suitable for use as a domestic smoke detector and meets the relevant building regulations that apply. It can of course be used in commercial premises too.
  • As a smoke detector since the upper region of the reflector is, in use, higher than the surface of the ceiling, it provides a higher point where smoke, which has a tendency to rise, will collect if there is a fire, again leading to potentially earlier detection. As the lower end of the recessed detector is open, there is nothing to impede the ingress of the smoke into the reflector to reach the smoke detection sensor.
  • the recessed detector is provided with a heat detector and a smoke detector within the reflector.
  • an audible alarm device is preferably incorporated into the recessed detector to emit an alarm warning sound in the event that a fire is detected.
  • the audible alarm device is a wafer sounder that is back fitted to the upper end of the reflector, preferably centrally within the reflector. In this way the reflector also acts to amplify the sound emitted by the sounder to improve the likelihood that the alarm will be heard by an occupant of the building or by a further person that can raise help.
  • a remote switch may be provided to silence or sound the alarm.
  • the emergency light source is positioned generally centrally at the upper end of the reflector. In one arrangement, for example, it is arranged to protrude or shine from the surface of the reflector close to the upper end. Ideally the portion emitting the light is roughly coincident with the focal point of the reflector or close enough to it to generate a concentrated beam of light that an occupant can see by.
  • the actual focal point of the reflector may be devoid of any components altogether, including the emergency light source, in order to improve the appearance and operation of the detection sensor.
  • the reflector which helps to enhance the heat sensitivity and smoke sensitivity of the detection sensor, and also helps to amplify an audible alarm signal, and also assists to direct light to the floor below in a concentrated beam of light so that a trapped occupant can escape.
  • the emergency light source is preferably a high brightness LED or LEDs of white or a yellow light. LEDs are preferred because these use less power than other light sources, meaning that the detector will last for longer on a backup battery power supply if the mains electricity supply fails. They also offer substantial brightness but generate only a small amount of heat. This is important in the embodiment where the detection sensor is a heat detector, allowing the detector to be reset easily after a test or false detection when the emergency light source would have been illuminated.
  • the emergency light source is preferably activated by a controller that is triggered by the output from the detection sensor.
  • the light source is arranged to be switched off during normal operation and only switch on during times of emergency when smoke or excessive heat is detected indicating a fire. If a remote silence/sound switch is provided, then the switch may also switch off/switch on the emergency lighting together with the audible alarm.
  • detector sensor could also be incorporated into the recessed detector.
  • a carbon dioxide sensor is set into the surface of the reflector.
  • the housing of the recessed detector may be entirely standard for existing downlight applications, and indeed is preferably an existing downlight component having established fire-proofing properties and certification.
  • the housing may include intumescent material, for example, as a collar of intumescent material that is positioned on the housing to expand against the cut edge of the ceiling panel.
  • intumescent material may be provided in a rim of the housing at the lower end for sealing against the surface of the ceiling.
  • Intumescent collars or discs may further be provided within the housing to close off ventilation holes, where present, in the event of fire. Separate fire-proofing, for example, in the form of a fire-proof hood may be preferred in certain situations.
  • the housing preferably also includes a pair of spring clips or other retention device or devices to retain the recessed detector securely in the ceiling panel and prevent the detector dropping out of the ceiling panel during a fire.
  • Spring clips are preferred as they facilitate easy removal of the recessed detector for inspection or maintenance.
  • the housing is preferably circular in cross-section, similar to existing downlight fittings, as circular holes are straight forward to cut into a ceiling panel.
  • the housing is between 80 and 120mm in diameter, and in a most preferred embodiment the housing is 100mm in diameter.
  • the housing could be square or rectangular if desired with an appropriate reflector design.
  • the recessed detector is preferably connected to a mains power source (240 or 110V, 50Hz AC supply) to charge a rechargeable battery pack, which in turn provides a power source for the detection sensor and the emergency light source.
  • the detector may instead receive a reduced voltage supply, e.g. a 12V or 24V DC supply.
  • a green LED may be provided in the reflector to indicate charging and a red LED may be provided to indicate the alarm status (e.g., red light "on” to indicate that the detector is "active").
  • the electronic components for controlling the operation of the recessed detector may be provided in a remote gear tray located in the ceiling void beyond the housing.
  • the gear tray may be either mechanically joined to the housing or, more preferably, be provided as a separate item that is pushed up into the ceiling void through a hole in the ceiling before the recessed detector is fitted.
  • a connector may be provided on the electrical leads from the recessed detector for easy connection with a corresponding connector on the gear tray.
  • a decorative bezel is provided on or is mountable on the lower end of the housing.
  • the bezel hides from view the housing and the edge of the cut hole that the recessed detector fits into, in order to provide a neat finish.
  • the bezel snap-fits, screws or twist-locks onto the lower end of the housing and is available in a range of finishes, e.g., white, polished chrome, brushed aluminium, etc., that can be specified by the user, for example, to match other ceiling fittings.
  • the decorative bezel is the only visible component of the recessed detector that extends below the surface of the ceiling.
  • the recessed detector 1 comprises a generally cylindrical housing 2, which is open at its lower end 3 and closed off at its upper end 4.
  • the housing 2 also includes a flange 5 at its lower end 3, which is intended to sit flush against a lower surface of a ceiling panel.
  • the housing 2 extends from the flange 5 into a ceiling void 6 immediately above the ceiling panel 7, such that only the flange 5, or more preferably, a decorative bezel 9, is visible from the room below 8 (see the side elevation in Figure 3 ).
  • the housing 2 is made of metal and may be die-cast in aluminium or an aluminium alloy, or could be formed from steel sheet or other suitable material.
  • the housing 2 may be provided with a gun metal grey finish.
  • the recessed detector 1 is shown with the reflector 10 removed to show the internal claw clamps 11 that are provided internally within the housing 1 in order to clamp the reflector 10 in place.
  • a second internal claw clamp 11 is provided on the inside surface of the housing 2 opposite the one shown to secure the reflector properly.
  • tags 12 are provided for attaching external metal dual-wing clamps (one on each side of the housing 2), which are able to expand and contract to secure the housing 2 in a hole 13 provided in the ceiling panel 7.
  • FIG. 2 which is a view from underneath the recessed detector 1 looking up into the internal space of the housing 2, three recessed notches 14, preferably spaced symmetrically around the flange 5, are provided in the outer edge of the flange 5 for attaching a decorative bezel 9 thereto. More or less than three notches 14 may be provided as desired.
  • the recessed notches 14 allow lugs (not shown) on the decorative bezel to pass through to grip the upper surface of the flange 5 to retain the decorative bezel 9 in place. The installer aligns the lugs with the recessed notches, pushes the decorative bezel 9 onto the flange 5, then rotates it to lock it in place.
  • the recessed detector 1 can be provided with a range of decorative bezels 9, each having a different finish, for the installer to choose as appropriate.
  • a fire-rated intumescent seal is provided either on the side of the housing 2 to seal against the vertical edges of the hole 13 in the ceiling panel 7 or on the upper surface of the decorative bezel 9 or flange 5 to seal against the underside of the ceiling panel 7 (the intumescent seals are not visible in the figures).
  • Further intumescent seals may be provided in the upper end 4 of the housing 2 to seal ventilation holes provided for ventilation or for cables to pass through.
  • Figure 4 is an exploded view from the side of a recessed detector 1.
  • the reflector 10 slots into the internal claw clamps 11 provided within the housing 2 and the decorative bezel 9 fits on to the flange 5 as described above.
  • the metal dual-wing clamps 15 are shown in position fitted onto the tags 12.
  • the housing 2 may taper towards its upper end 4 as shown through having cylindrical portions of steadily reducing diameter. This tapering may make it easier to insert the recessed detector 1 into the ceiling void 6.
  • the reflector 10 is generally cone-shaped, and in the examples shown is a parabolic reflector having an open lower end 16.
  • the internal surface 17 of the reflector 10 is preferably a metal finish in order to provide a light reflecting surface. This can be seen more clearly in Figure 5 which is a photograph from below the recessed detector 1.
  • the reflector 10 may include a plurality of facets 18 or other surface relief for reflecting light in different directions.
  • a heat detector 20 protrudes from the internal surface 17 of the reflector 10 at the upper end 19 towards an upper central region of the reflector 2.
  • this heat detector 20 could be replaced with a smoke detector (or other detector), or alternatively a smoke detector could be used in conjunction with a heat detector 20 within the reflector 10.
  • a back-built wafer sounder 21 to provide an audible alarm to any room occupants.
  • an emergency light source 22 in the form of a bright LED which can illuminate white, yellow or similar light of sufficient intensity as illumination to help an occupant within the room to escape.
  • an alarm status LED 23 for example a red LED.
  • a further LED may be provided to indicate that a rechargeable power source is charging from a mains electricity supply.
  • a remote gear tray 24 which is connected to the housing 2 of the recessed detector 1.
  • the remote gear tray 24 contains a rechargeable battery (not visible) to provide a back-up power supply in the event that the mains power supply fails during a fire. It also contains all the components required to run and control the detector, all provided within a housing which will give some fire protection to the components inside.
  • a cable 25 supplies the recessed detector 1 with mains electricity.
  • the remote gear tray 24 can be provided as a separate component that is connected to the recessed detector 1 by wires. This allows the remote gear tray 24 to be pushed up through the hole 13 in the ceiling panel 7 before fitting the recessed detector 1.
  • the recessed detector 1 offers a much more aesthetically pleasing device than the surface mounted detectors that are usually provided in domestic environments. From a distance, the detector 1 will look like a standard recessed downlight which are common within most properties and offices nowadays. Standing underneath the recessed detector 1, an observer would see the shiny reflective surface of the reflector 10 and the small coloured LED's indicating that the alarm is active and charging, all of which would be pleasing to the eye. In addition, the recessed detector 1 offers better detection properties when detecting heat and/or smoke, since heat and smoke will tend to rise to a highest point, namely the upper closed end 19 of the reflector 10.
  • the reflector has many functions, namely to collect and concentrate heat and/or smoke for the heat/or smoke detector, to concentrate a beam of light from the emergency light source to provide illumination that can help an occupant escape, and to amplify the sound from an audible alarm device to alert the occupant of the fire.
  • an intumescent fire barrier within the metal fitting, it can be assured that fire safety is still met.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fire-Detection Mechanisms (AREA)
EP12160117.3A 2011-03-17 2012-03-19 Détecteur encastré de fumée ou chaleur Withdrawn EP2500639A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1104559.8A GB2489039B (en) 2011-03-17 2011-03-17 Recessed smoke or heat detector

Publications (2)

Publication Number Publication Date
EP2500639A2 true EP2500639A2 (fr) 2012-09-19
EP2500639A3 EP2500639A3 (fr) 2014-08-20

Family

ID=44012763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12160117.3A Withdrawn EP2500639A3 (fr) 2011-03-17 2012-03-19 Détecteur encastré de fumée ou chaleur

Country Status (2)

Country Link
EP (1) EP2500639A3 (fr)
GB (1) GB2489039B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104101426A (zh) * 2014-07-25 2014-10-15 武汉理工光科股份有限公司 反射式全景视角火焰探测器
CN104766432A (zh) * 2015-03-19 2015-07-08 保定隶都电子科技有限公司 感烟感温火灾探测器
US9395248B2 (en) 2011-05-24 2016-07-19 Excelitas Technologies Singapore Pte. Ltd Radiation sensing device and control circuit
DE202015104834U1 (de) * 2015-09-11 2016-12-14 Zumtobel Lighting Gmbh Deckeneinbauleuchte mit Betriebszustands-Anzeige
US10826231B2 (en) 2016-05-03 2020-11-03 Autronica Fire & Security As Fire detector mounting assembly and method
US11195399B2 (en) 2017-09-06 2021-12-07 Carrier Corporation Heat alarm unit

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Publication number Priority date Publication date Assignee Title
US11454389B1 (en) * 2021-06-22 2022-09-27 Brian A Ryznic Combination recessed lighting and smoke detector
CA3176740A1 (fr) * 2021-04-12 2022-10-12 Lightheaded Lighting Ltd. Assemblage de lumiere a del monte au plafond

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US5333418A (en) 1992-09-02 1994-08-02 Ronald Chambers Recessed smoke detector
WO2005124710A1 (fr) 2004-06-21 2005-12-29 Burke Anthony John Detecteur de fumees
GB2446430A (en) 2007-02-09 2008-08-13 Contactum Ltd Fitting for mounting electrical components in a surface
US20080210839A1 (en) 2006-11-15 2008-09-04 Klapp Charles R Smoke detector recessed box

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JPS6419499A (en) 1987-07-15 1989-01-23 Nohmi Bosai Kogyo Co Ltd Fire alarm equipment
US5333418A (en) 1992-09-02 1994-08-02 Ronald Chambers Recessed smoke detector
WO2005124710A1 (fr) 2004-06-21 2005-12-29 Burke Anthony John Detecteur de fumees
US20080210839A1 (en) 2006-11-15 2008-09-04 Klapp Charles R Smoke detector recessed box
GB2446430A (en) 2007-02-09 2008-08-13 Contactum Ltd Fitting for mounting electrical components in a surface

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9395248B2 (en) 2011-05-24 2016-07-19 Excelitas Technologies Singapore Pte. Ltd Radiation sensing device and control circuit
CN104101426A (zh) * 2014-07-25 2014-10-15 武汉理工光科股份有限公司 反射式全景视角火焰探测器
CN104101426B (zh) * 2014-07-25 2016-02-10 武汉理工光科股份有限公司 反射式全景视角火焰探测器
CN104766432A (zh) * 2015-03-19 2015-07-08 保定隶都电子科技有限公司 感烟感温火灾探测器
DE202015104834U1 (de) * 2015-09-11 2016-12-14 Zumtobel Lighting Gmbh Deckeneinbauleuchte mit Betriebszustands-Anzeige
US10826231B2 (en) 2016-05-03 2020-11-03 Autronica Fire & Security As Fire detector mounting assembly and method
US11195399B2 (en) 2017-09-06 2021-12-07 Carrier Corporation Heat alarm unit

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EP2500639A3 (fr) 2014-08-20
GB201104559D0 (en) 2011-05-04
GB2489039B (en) 2013-07-03

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