EP1756472A1 - Hitzebeständiges gehäuse - Google Patents

Hitzebeständiges gehäuse

Info

Publication number
EP1756472A1
EP1756472A1 EP05744670A EP05744670A EP1756472A1 EP 1756472 A1 EP1756472 A1 EP 1756472A1 EP 05744670 A EP05744670 A EP 05744670A EP 05744670 A EP05744670 A EP 05744670A EP 1756472 A1 EP1756472 A1 EP 1756472A1
Authority
EP
European Patent Office
Prior art keywords
heat resistant
casing according
housing
resistant casing
intumescent material
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.)
Granted
Application number
EP05744670A
Other languages
English (en)
French (fr)
Other versions
EP1756472B1 (de
Inventor
Karl Justin Rawlins
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.)
Scolmore International Ltd
Original Assignee
Scolmore International 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
Priority claimed from GBGB0413655.2A external-priority patent/GB0413655D0/en
Application filed by Scolmore International Ltd filed Critical Scolmore International Ltd
Publication of EP1756472A1 publication Critical patent/EP1756472A1/de
Application granted granted Critical
Publication of EP1756472B1 publication Critical patent/EP1756472B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • 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

Definitions

  • This invention relates to a new fire resistant casing for use with electrical fittings, particularly for use with lamp holders.
  • New building regulations require down-lighters fitted into ceilings to be provided with fire hoods to prevent or at least minimise the spread of fire.
  • Various types of fire hood have been proposed which include a fire resistant intumescent material that upon excessive heating (e.g. in the event of a fire) expand to many times their original volume, thus forming a fire barrier to minimise or prevent fire spread.
  • These hoods have been quite successful, but the aim is still to increase the efficiency of the built-in ventilation and fire/heat protection, whilst providing a cost effective and easy to install option.
  • An object of the present invention is to provide a new heat resistant casing (fire hood) which can be supplied already fitted with a lamp holder or other electrical fitting and which in use is efficient at minimising heat build up and also in preventing or minimising fire spread, should that occur.
  • a heat-resistant casing for an electrical fitting in which the casing comprises a housing of heat resistant material comprising a top supporting one or more side-walls, the top is provided with at least one aperture, the housing encloses an electrical fitting which is attached to the housing by an attachment means, and within the housing is a first solid fire-resistant intumescent material positioned between the interior surface of the top and the electrical fitting, characterised in that the first solid fire-resistant intumescent material is provided with at least one aperture and is spaced apart from the interior surface of the top, and the housing is further provided with a collar of a second solid fire-resistant intumescent material which extends substantially completely around the exterior surface of the side wall or walls.
  • the housing is preferably of substantially circular cross-section and is preferably of self-supporting substantially rigid construction and of metal or plastic.
  • the top preferably has a plurality of apertures for ventilation (heat dissipation), passage of electrical . cables and attachment means for the first fire resistant intumescent material.
  • the 'free edge' of the side wall i.e. the side wall remote from the top, preferably has an outwardly extending lip. This lip may be used for attachment of a cover for the electrical fitting. Where the electrical fitting is a lamp holder, a cover in the form of a decorative ring can be attached to the lip.
  • the casing is particularly applicable for recessing into a support structure such as a ceiling or wall, especially when the support structure is being constructed.
  • a seal is provided substantially overlying the lip so that the seal when in use is sandwiched between the lip and the surface into which the casing is fitted e.g. a ceiling or wall.
  • One aim of the seal is to prevent moisture and air from getting between the casing and the fitting surface (e.g. ceiling or wall) and thus into the voids between floors and into loft spaces. This is an area in which house builders are being told to clamp down, so to improve energy efficiency and is requested by the NHBC (National House Builders Council).
  • a further potential benefit of the seal is that it allows the casing to sit evenly on the ceiling where a textured surface, e.g. Artex, has been used, thus not showing gaps around the rim and preventing the downlighter leaning at an angle.
  • the seal helps to reduce the contact temperature between the rim of the downlighter and the ceiling board.
  • the seal may e.g be made of a moistrure resistant elastomeric composition and preferably is provided with a raised rib portion on the surface remote from the lip.
  • the intumescent material may be based on graphite or other intumesecent materials which upon exposure to extreme heat expand in volume.
  • An example of a graphite based material is that supplied by Technical Fibre Products Limited as 'Intumescent Material' and consists of a high temperature Rockwool fibre mat containing easily dispersed foliating graphite bonded in acrylic.
  • the first and second intumescent materials may be of the same composition or different.
  • the first intumescent material is provided with a plurality of apertures.
  • the apertures are for passage of electrical cables and/or for ventilation to dissipate heat that tends to build up in the casing when the electrical fitting is switched on.
  • a plate is provided to support the first intumescent material, in which case the plate is usually provided with apertures, at least some of which coincide with those of the first intumescent material.
  • the apertures are conveniently circular holes punched through with a suitable tool.
  • the plate is preferably sized to fit snugly within the casing and may then be attached to the interior surface of the top by means of e.g. nuts and bolts. The nuts also serve to maintain the necessary space between the interior surface of the top and the first intumescent material supported on the plate.
  • the gap between the interior surface of the top and the first intumescent material is in the range 2 to 8 mm, more preferably 2 to 5mm.
  • this may conveniently be used for attachment of the electrical fitting e.g. by means of nuts and bolts.
  • the electrical fitting is preferably positioned within the housing so that it does not touch the internal surface of the side wall or walls.
  • Figure 1 is a schematic view, partly in section, of a casing according to the present invention.
  • Figure 2 is a perspective top view of the casing of Figure 1, also showing connections of the electrical cable to a terminal housing.
  • Figure 3 is a perspective top view of the first solid fire-resistant material used in Figure 1, attached to its backing plate and threaded through with electrical cables.
  • Figure 4 is a bottom view of the first solid fire-resistant material and attached backing plate of Figure 3 in position in the casing.
  • Figure 5 is a schematic side view, partly in section, of the casing of Figure 1.
  • Figure 6 are perspective and side views illustrating a moisture seal (2 views), the seal positioned on a heat resistant casing and the casing recessed into a ceiling.
  • a heat resistant casing 10 comprises a cylindrical pressed steel housing consisting of a top 11 supporting a side wall 12.
  • the side wall 12 has a lip 13 onto which is clipped a cover 14 by means of spring clips 14a & 14b.
  • a collar 15 of solid fire resistant intumescent material surrounds the lower edge of the side wall 12. The collar 15 is 25mm high and
  • Plate 16 and layer 17 have corresponding apertures.
  • the gap 16A between the top 11 and layer 17 is chosen to be in the range 2 to 5mm.
  • the plate 16 is held in place by nuts and bolts 18, which also keep the gap 16A consistent.
  • a pressed steel lamp holder 19 is attached to plate 16 by means of nuts and bolts 20.
  • An aluminium lamp 21 fits into the lamp holder 19.
  • top 11 seven apertures are apparent in top 11. Through three apertures electrical cabling 22 to 24 passes, into two apertures are fitted fixing nuts and bolts for the terminal housing 25, one aperture 26 is open for ventilation, and one aperture 27 is occupied by a nut and bolt connected to the plate 16 inside the casing.
  • cables 22 and 23 are shown, together with ventilation apertures 28,29.
  • cables 22 & 23 are shown through plate 16, plus four ventilation apertures e.g. 30.
  • Figure 5 is a schematic representation showing i.a. more clearly how the down-lighter cover 14 clips into place.
  • the apertures in the top 11, solid fire resistant intumescent material 17 and plate 16 act to ventilate the casing and dissipate heat.
  • the solid fire resistant intumescent material 17 expands to 9 times its volume, filling the gap between the top 11 and plate 16 and the aforementioned apertures including those through which the cabling passes.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Building Environments (AREA)
  • Installation Of Indoor Wiring (AREA)
EP05744670A 2004-06-18 2005-05-17 Hitzebeständiges gehäuse Not-in-force EP1756472B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0413655.2A GB0413655D0 (en) 2004-06-18 2004-06-18 Heat resistant casing
GB0504267A GB2415245B (en) 2004-06-18 2005-03-02 Heat resistant casing
PCT/GB2005/001906 WO2005124225A1 (en) 2004-06-18 2005-05-17 Heat resistant casing

Publications (2)

Publication Number Publication Date
EP1756472A1 true EP1756472A1 (de) 2007-02-28
EP1756472B1 EP1756472B1 (de) 2010-04-21

Family

ID=34971514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05744670A Not-in-force EP1756472B1 (de) 2004-06-18 2005-05-17 Hitzebeständiges gehäuse

Country Status (3)

Country Link
EP (1) EP1756472B1 (de)
AU (1) AU2005255186B2 (de)
WO (1) WO2005124225A1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2421070B (en) * 2005-01-27 2007-01-10 Rd Europe Ltd Fire-resistant cover for lighting fitting
TWM296340U (en) * 2006-03-17 2006-08-21 Giantech Ind Co Ltd Embedded lamp
GB0616948D0 (en) * 2006-08-26 2006-10-04 Si Lite Ltd Convertible Fire Rated Down Lighter
GB2460270A (en) * 2008-05-23 2009-11-25 Bridisco Ltd A fire retardant sleeve for a wall mounted electrical box.
GB0817817D0 (en) * 2008-09-29 2008-11-05 Cole Robert Light fitting
GB2468699A (en) * 2009-03-19 2010-09-22 Warren Hickson Fire proof light fitting
FR2950128B1 (fr) * 2009-09-14 2015-08-07 Marc Joseph Soudat Systeme de fixation indemontable sans outils d'un luminaire encastre dans un plafond
GB201102129D0 (en) * 2011-02-08 2011-03-23 Jones Peter C Recessed light fitting
GB201203260D0 (en) * 2012-02-23 2012-04-11 Scolmore Int Ltd Lighting accessories
GB201302348D0 (en) * 2013-02-11 2013-03-27 Scolmore Int Ltd Heat resistant casing
CN107246566B (zh) * 2017-06-09 2021-02-26 黄世明 一种新型防火嵌灯
US11384929B2 (en) 2020-09-11 2022-07-12 De Brousse & Crémant Inc. Fire rated recessed lighting fixture

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998012472A1 (en) * 1996-09-20 1998-03-26 Peter Charles Jones Installation of lighting or other fittings in ceilings
GB2326467A (en) 1997-05-29 1998-12-23 Environmental Seals Ltd Downlighter with integral fire-resistant hood
GB9710921D0 (en) * 1997-05-29 1997-07-23 Euro Passive Fire Protection L Ventilated covers for electrical fittings
US6447145B1 (en) * 2000-06-30 2002-09-10 Genlyte Thomas Group Llc Glass accent trim plate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005124225A1 *

Also Published As

Publication number Publication date
AU2005255186B2 (en) 2008-02-21
EP1756472B1 (de) 2010-04-21
WO2005124225A1 (en) 2005-12-29
AU2005255186A1 (en) 2005-12-29

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