GB2326467A - Downlighter with integral fire-resistant hood - Google Patents
Downlighter with integral fire-resistant hood Download PDFInfo
- Publication number
- GB2326467A GB2326467A GB9711005A GB9711005A GB2326467A GB 2326467 A GB2326467 A GB 2326467A GB 9711005 A GB9711005 A GB 9711005A GB 9711005 A GB9711005 A GB 9711005A GB 2326467 A GB2326467 A GB 2326467A
- Authority
- GB
- United Kingdom
- Prior art keywords
- downlighter
- hood
- collar
- reflector
- casing
- 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- Withdrawn
Links
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
- 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
- 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
- F21V25/00—Safety devices structurally associated with lighting devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Brushes (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Inorganic Insulating Materials (AREA)
- Forging (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Building Environments (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
A downlighter comprises a casing 1 for housing electrical connections for connecting the downlighter to a source of mains electricity and a downwardly extending electrical contact collar 2 for receiving a bulb, fluorescent tube or other light fitting. A reflector 4 extends downwardly from the casing to a position below the light fitting, and a fabric hood 9 coated or impregnated with a liquid based intumescent material extends downwardly from the underside of the casing around the external wall of the reflector. The hood is connected at its lower end to an annular base of the downlighter and includes a top 11 to which is secured an intumescent gasket 12 formed with an aperture 14 through which the downlighter collar 2 extends with a clearance between the boundary of the aperture and the collar exterior.
Description
ELECTRIC LIGHT FITTINGS
This invention relates to electric light fittings suitable for mounting within a ceiling space of a building. More especially the invention concerns a mains connected light fitting having an integral hood which in the event of fire isolates the light fitting from the ceiling space in which it is mounted and reacts to prevent or minimise the passage of flames and/or smoke to other areas of the building.
Light fittings recessed into ceiling spaces are well known. Such light fittings are known as downlighters and are referred to as such hereinafter.
The heat generated by downlighters can be considerable and represents a fire hazard. Also the ceiling space in which a downlighter is mounted can itself provide a path for fire and smoke to other rooms or areas of a building.
Fire resistant covers for downlighters have previously been proposed.
Such a cover is separate from a downlighter to be protected and consequently needs to be carefully positioned over and spaced from the exterior of the down lighter. These covers also rely upon fixings into a surface of a ceiling structure for securement purposes. In practice correct alignment of a cover with respect to a downlighter can be difficult particularly where access to the ceiling space is limited. Furthermore fixing a cover to a ceiling can be difficult and can detract aesthetically from the decor of the ceiling.
The present invention sets out to provide a downlighter which includes an integral protective hood and which eliminates or at least alleviates many of the disadvantages discussed above.
According to the present invention in one aspect there is provided a downlighter which comprises a casing for housing electrical connections for connecting the downlighter to a source of mains electricity and a downwardly extending electrical contact collar for receiving a bulb, fluorescent tube or other light fitting, a reflector extending downwardly from the casing to a position below the light fitting, and a fabric hood coated or impregnated with a liquid based intumescent material which extends downwardly from the underside of the casing around the external wall of the reflector and is connected at its lower end to an annular base of the downlighter, the hood including a top to which is secured an intumescent gasket formed with an aperture through which the downlighter collar extends with a clearance between the boundary of the aperture and the collar exterior.
The fabric is preferably a fibrous cloth (e.g. a glass fibre cloth) which is coated on one or both of its surfaces with a liquid based intumescent material. The intumescent gasket may comprise a suitably shaped piece of card which overflies a similarly shaped piece of intumescent cloth.
The reflector may be connected at its upper end to the collar; thus the collar may be externally threaded and receive complementary internal threading of a sleeve located within a neck of the reflector.
The downlighter casing may be connected to its annular base by a plurality of elongate relatively rigid straps, the fabric hood being trapped between these straps and the reflector exterior. The annular base may be formed with a radially outwardly extending lip on which an outwardly extending end piece of the hood lies. This hood end piece may be secured to the lip.
In another aspect the invention provides a downlighter having an integral hood which is produced from a fibrous cloth material coated or impregnated with a liquid based intumescent material, the hood including in its upper surface an intumescent gasket formed with an aperture through which a contact collar for a light fitting of the downlighter protrudes.
The invention will now be described by way of example only with reference to the accompanying diagrammatic drawings in which:
Figure 1 is a side view partly in section of a downlighter in accordance with the invention; and
Figure 2 is a plan view from below of the down lighter shown in Figure 1.
The downlighter illustrated in the drawings has an upper casing 1 which houses electrical connectors, receptors for connecting the downlighter through wiring to a source of mains electricity. The casing may also house items such as starters and/or capacitors for fluorescent tubes. Protruding downwardly from the casing 1 is a light fitting electrical contact collar 2 which is open at its lower end to receive a conventional light bulb or fluorescent tube (not shown). The outer face of the collar is threaded for connection to an internally threaded sleeve 3 positioned within the upper open end of a frusto-conical hollow reflector 4. The height of the reflector is such that it entirely encompasses the light fitting of the downlighter.
The base of the downlighter is defined by an annular collar 5 formed with an outwardly extending radial lip 6 and secured to the casing 1 through a plurality of elongate relatively rigid straps 7. Each strap 7 includes a flexible clip 8 to assist location of the downlighter within a ceiling space.
Positioned about the external circumference of the reflector 4 is a hood 9. The hood 9 is produced from a fibrous woven cloth (e.g. a glass fibre woven cloth) which has been coated on one or both of its sides with an intumescent paint or other intumescent material. Preferably the cloth is impregnated with intumescent. As shown the hood 9 is frusto-conical and comprises an upstanding side wail 10 and a top 11. Typically the side wall 10 is produced from a length of glass fibre cloth which is sewn together at the cloth ends, the top 11 then being secured to the upper margin of the side wall again by sewing. The hood top 11 has secured to it a circular piece of card which overlies and is bonded to a similarly shaped piece of intumescent material to define an intumescent gasket 1 2. This material typically comprises fibrous material impregnated with an intumescent such as carbon granules. The gasket 1 2 comprising the card and intumescent may be adhered to the hood or secured to the hood by studs or rivets. The gasket is formed with a central opening 14 through which passes the light fitting collar 2. The size of the opening 1 4 is such that the border of the opening 14 is at least partially spaced from the exterior of the collar to facilitate ventilation of the downlighter interior.
The hood 9 is formed at its lowermost end with an outwardly extending fabric piece 1 5 which locates on the upper surface of the downlighter lip 6. The fabric piece 1 5 may be secured to the lip 6.
As shown the hood 9 is trapped between the straps 7 and the external surface of the reflector 4. Studs or rivets 1 6 pass through the adjoining surfaces of the straps, the hood and the reflector.
The annular base 5 of the downlighter may receive a translucent cover which effectively seals the lower end of the reflector.
In use, heat generated by a downlighter can represent a fire hazard.
In the event of such a fire, the intumescent coating of the hood 9 and the intumescent gasket 1 2 quickly expands to isolate the downlighter entirely from the surrounding structure thereby confining the fire and any resuiting smoke and maintaining the fire resistance of the structure. Covers in accordance with the invention have been subjected to fire testing with no failure of the integrity criterion at the end of four hours testing.
It will be appreciated that the forgoing is merely exemplary of downlighters in accordance with the invention and that modifications can readily be made thereto without departing from the true scope of the invention.
Claims (11)
1. A downlighter which comprises a casing for housing electrical
connections for connecting the downlighter to a source of mains
electricity and a downwardly extending electrical contact collar for
receiving a bulb, fluorescent tube or other light fitting, a reflector
extending downwardly from the casing to a position below the light
fitting, and a fabric hood coated or impregnated with a liquid based
intumescent material which extends downwardly from the underside
of the casing around the external wall of the reflector and is
connected at its lower end to an annular base of the downlighter, the
hood including a top to which is secured an intumescent gasket
formed with an aperture through which the downlighter collar extends
with a clearance between the boundary of the aperture and the collar
exterior.
2. A downlighter as claimed in Claim 1 wherein the fabric is a fibrous
cloth which is coated on one or both of its surfaces with a liquid
based intumescent material.
3. A downlighter as claimed in Claim 2 wherein the fibrous cloth is a
glass fibre cloth.
4. A downlighter as claimed in any one of Claims 1 to 3 wherein the
intumescent gasket may comprise a suitably shaped piece of card
which overlies a similarly shaped piece of intumescent cloth.
5. A downlighter as claimed in any one of the preceding Claims wherein
the reflector is connected at its upper end to the collar.
6. A downlighter as claimed in Claim 5 wherein the collar is externally
threaded and receives complementary internal threading of a sleeve
located within a neck of the reflector.
7. A downlighter as claimed in any one of the preceding claims wherein
its casing is connected to its annular base by a plurality of elongate
relatively rigid straps, the fabric hood being trapped between these
straps and the reflector exterior.
8. A downlighter as claimed in Claim 7 wherein the annular base is
formed with a radially outwardly extending lip on which an outwardly
extending end piece of the hood lies.
9. A downlighter as claimed in Claim 8 where the hood end piece is
secured to the lip.
10. A downlighter having an integral hood which is produced from a
fibrous cloth material coated or impregnated with a liquid based
intumescent material, the hood including in its upper surface an
intumescent gasket formed with an aperture through which a contact
collar for a light fitting of the downlighter protrudes.
11. A downlighter substantially as herein described and as described with
reference to Figures 1 and 2 of the accompanying drawings.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9711005A GB2326467A (en) | 1997-05-29 | 1997-05-29 | Downlighter with integral fire-resistant hood |
AT98922922T ATE212427T1 (en) | 1997-05-29 | 1998-05-20 | ELECTRICAL LIGHTING EQUIPMENT |
PCT/GB1998/001459 WO1998054512A1 (en) | 1997-05-29 | 1998-05-20 | Electric light fittings |
DE69803567T DE69803567D1 (en) | 1997-05-29 | 1998-05-20 | ELECTRIC LIGHTING DEVICES |
EP98922922A EP0983471B1 (en) | 1997-05-29 | 1998-05-20 | Electric light fittings |
AU75386/98A AU7538698A (en) | 1997-05-29 | 1998-05-20 | Electric light fittings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9711005A GB2326467A (en) | 1997-05-29 | 1997-05-29 | Downlighter with integral fire-resistant hood |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9711005D0 GB9711005D0 (en) | 1997-07-23 |
GB2326467A true GB2326467A (en) | 1998-12-23 |
Family
ID=10813176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9711005A Withdrawn GB2326467A (en) | 1997-05-29 | 1997-05-29 | Downlighter with integral fire-resistant hood |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0983471B1 (en) |
AT (1) | ATE212427T1 (en) |
AU (1) | AU7538698A (en) |
DE (1) | DE69803567D1 (en) |
GB (1) | GB2326467A (en) |
WO (1) | WO1998054512A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10216373A1 (en) * | 2002-04-12 | 2003-10-30 | Gessler Accumulatorentechnik G | Fireproof safety lamp installation for use in tunnel, has metal housing surrounding gas- or vapor-discharge lamp and starter circuit and lined with panels of gypsum and fireproof fibrous material |
GB2415245A (en) * | 2004-06-18 | 2005-12-21 | Scolmore Int Ltd | Heat Resistant Casing |
WO2005121642A1 (en) | 2004-06-09 | 2005-12-22 | Liangju Wu | A built-in light fitting for fire preventing |
WO2005124225A1 (en) | 2004-06-18 | 2005-12-29 | Scolmore International Limited | Heat resistant casing |
GB2421070A (en) * | 2005-01-27 | 2006-06-14 | Rd Europe Ltd | Fire-Resistant over for Lighting Fitting |
GB2422191A (en) * | 2005-01-27 | 2006-07-19 | Rd Europe Ltd | Fire Resistant Light Fitting |
US7114294B2 (en) | 2000-03-08 | 2006-10-03 | Hubbell Incorporated | Fire assembly for recessed electrical fixtures |
GB2426321A (en) * | 2005-05-23 | 2006-11-22 | Aurora Ltd | Fire rated downlights |
GB2426300A (en) * | 2005-05-18 | 2006-11-22 | Environmental Seals Ltd | An intumescent and acoustic gasket |
GB2429052A (en) * | 2005-08-08 | 2007-02-14 | Laurence Kovacs | Lighting Assemblies |
CN100483023C (en) * | 2004-08-20 | 2009-04-29 | 武良举 | Embedded lamp |
US7651238B2 (en) | 2007-01-10 | 2010-01-26 | O'brien Aaron | Fireproof trim and insulated lighting assembly |
EP2166283A1 (en) | 2008-09-22 | 2010-03-24 | Intumescent Systems Limited | Fire and smoke resistant covers for electrical fittings |
US10984775B2 (en) | 2018-09-21 | 2021-04-20 | Fischer Lighting Holding Aps | Light fixture for absorbing sound energy |
US11739921B2 (en) | 2019-06-18 | 2023-08-29 | Fischer Lighting Holding Aps | Modular lighting device comprising an adjustable mounting mechanism |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100529526C (en) * | 2004-06-09 | 2009-08-19 | 武良举 | Inserted fire-proof lamp |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4754377A (en) * | 1986-02-21 | 1988-06-28 | Thomas Industries, Inc. | Thermally protected recessed lighting fixture |
GB2297609A (en) * | 1995-01-25 | 1996-08-07 | Environmental Seals Ltd | Ventilated covers for electic fittings |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9220478D0 (en) * | 1992-09-29 | 1992-11-11 | Hamilton Arthur P | Fire stop covering device for aperture in fire resistant structure |
-
1997
- 1997-05-29 GB GB9711005A patent/GB2326467A/en not_active Withdrawn
-
1998
- 1998-05-20 WO PCT/GB1998/001459 patent/WO1998054512A1/en active IP Right Grant
- 1998-05-20 EP EP98922922A patent/EP0983471B1/en not_active Expired - Lifetime
- 1998-05-20 AU AU75386/98A patent/AU7538698A/en not_active Abandoned
- 1998-05-20 AT AT98922922T patent/ATE212427T1/en not_active IP Right Cessation
- 1998-05-20 DE DE69803567T patent/DE69803567D1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4754377A (en) * | 1986-02-21 | 1988-06-28 | Thomas Industries, Inc. | Thermally protected recessed lighting fixture |
GB2297609A (en) * | 1995-01-25 | 1996-08-07 | Environmental Seals Ltd | Ventilated covers for electic fittings |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7114294B2 (en) | 2000-03-08 | 2006-10-03 | Hubbell Incorporated | Fire assembly for recessed electrical fixtures |
DE10216373A1 (en) * | 2002-04-12 | 2003-10-30 | Gessler Accumulatorentechnik G | Fireproof safety lamp installation for use in tunnel, has metal housing surrounding gas- or vapor-discharge lamp and starter circuit and lined with panels of gypsum and fireproof fibrous material |
WO2005121642A1 (en) | 2004-06-09 | 2005-12-22 | Liangju Wu | A built-in light fitting for fire preventing |
US7470048B2 (en) | 2004-06-09 | 2008-12-30 | Liangju Wu | Fire-rated recessed downlight |
AU2005252280B2 (en) * | 2004-06-09 | 2008-11-13 | Liangju Wu | A built-in light fitting for fire preventing |
GB2430729B (en) * | 2004-06-09 | 2008-03-26 | Liangju Wu | A built-in light fitting for fire preventing |
EP1754935A4 (en) * | 2004-06-09 | 2007-12-26 | Liangju Wu | A built-in light fitting for fire preventing |
WO2005124225A1 (en) | 2004-06-18 | 2005-12-29 | Scolmore International Limited | Heat resistant casing |
AU2005255186B2 (en) * | 2004-06-18 | 2008-02-21 | Scolmore International Limited | Heat resistant casing |
EP1607675A1 (en) * | 2004-06-18 | 2005-12-21 | Scolmore International Limited | Heat resistant casing |
GB2415245A (en) * | 2004-06-18 | 2005-12-21 | Scolmore Int Ltd | Heat Resistant Casing |
GB2415245B (en) * | 2004-06-18 | 2007-03-28 | Scolmore Int Ltd | Heat resistant casing |
CN100483023C (en) * | 2004-08-20 | 2009-04-29 | 武良举 | Embedded lamp |
GB2421070A (en) * | 2005-01-27 | 2006-06-14 | Rd Europe Ltd | Fire-Resistant over for Lighting Fitting |
GB2422191B (en) * | 2005-01-27 | 2007-01-10 | Rd Europe Ltd | Fire-resistant lighting fitting |
GB2421070B (en) * | 2005-01-27 | 2007-01-10 | Rd Europe Ltd | Fire-resistant cover for lighting fitting |
EP1688663A3 (en) * | 2005-01-27 | 2006-08-23 | RD Europe Limited | Fire-resistant lighting fitting |
EP1686315A1 (en) | 2005-01-27 | 2006-08-02 | RD Europe Limited | Fire-resistant cover for lighting fitting |
GB2422191A (en) * | 2005-01-27 | 2006-07-19 | Rd Europe Ltd | Fire Resistant Light Fitting |
GB2426300A (en) * | 2005-05-18 | 2006-11-22 | Environmental Seals Ltd | An intumescent and acoustic gasket |
GB2426300B (en) * | 2005-05-18 | 2010-03-10 | Environmental Seals Ltd | Improvements in and relating to intumescent gaskets |
GB2426321B (en) * | 2005-05-23 | 2007-06-06 | Aurora Ltd | Improvements to fire rated downlights |
US7476010B2 (en) | 2005-05-23 | 2009-01-13 | Aurora Limited | Fire rated downlights |
GB2426321A (en) * | 2005-05-23 | 2006-11-22 | Aurora Ltd | Fire rated downlights |
US7954974B2 (en) | 2005-05-23 | 2011-06-07 | Aurora Limited | Fire rated downlights |
GB2429052A (en) * | 2005-08-08 | 2007-02-14 | Laurence Kovacs | Lighting Assemblies |
GB2429052B (en) * | 2005-08-08 | 2010-09-22 | Laurence Kovacs | Lighting assemblies |
US7651238B2 (en) | 2007-01-10 | 2010-01-26 | O'brien Aaron | Fireproof trim and insulated lighting assembly |
EP2166283A1 (en) | 2008-09-22 | 2010-03-24 | Intumescent Systems Limited | Fire and smoke resistant covers for electrical fittings |
US10984775B2 (en) | 2018-09-21 | 2021-04-20 | Fischer Lighting Holding Aps | Light fixture for absorbing sound energy |
US11578858B2 (en) | 2018-09-21 | 2023-02-14 | Fischer Lighting Holding Aps | Modular lighting device |
US11739921B2 (en) | 2019-06-18 | 2023-08-29 | Fischer Lighting Holding Aps | Modular lighting device comprising an adjustable mounting mechanism |
Also Published As
Publication number | Publication date |
---|---|
EP0983471A1 (en) | 2000-03-08 |
AU7538698A (en) | 1998-12-30 |
ATE212427T1 (en) | 2002-02-15 |
WO1998054512A1 (en) | 1998-12-03 |
EP0983471B1 (en) | 2002-01-23 |
GB9711005D0 (en) | 1997-07-23 |
DE69803567D1 (en) | 2002-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |