EP1754930B1 - Lighting fixture protection - Google Patents

Lighting fixture protection Download PDF

Info

Publication number
EP1754930B1
EP1754930B1 EP06118918A EP06118918A EP1754930B1 EP 1754930 B1 EP1754930 B1 EP 1754930B1 EP 06118918 A EP06118918 A EP 06118918A EP 06118918 A EP06118918 A EP 06118918A EP 1754930 B1 EP1754930 B1 EP 1754930B1
Authority
EP
European Patent Office
Prior art keywords
protection
lighting fixture
reflector
light
lamp
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.)
Not-in-force
Application number
EP06118918A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1754930A1 (en
Inventor
Veijo Aalto
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.)
I-Valo Oy
Valo Oy
Original Assignee
I-Valo Oy
Valo Oy
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 I-Valo Oy, Valo Oy filed Critical I-Valo Oy
Publication of EP1754930A1 publication Critical patent/EP1754930A1/en
Application granted granted Critical
Publication of EP1754930B1 publication Critical patent/EP1754930B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • 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
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
    • 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
    • F21V31/03—Gas-tight or water-tight arrangements with provision for venting
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • 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
    • F21V31/005—Sealing arrangements therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/402—Lighting for industrial, commercial, recreational or military use for working places

Definitions

  • the invention relates to a light-permeable protection for a lighting fixture according to claim 1.
  • a light source unit from the Japanese patent publication JP-2001307535 , in which unit, a light-permeable protective element is fitted in the opening of the reflector element.
  • Said protective element is realized of a netting element. Its purpose is to prevent the glass splinters from a high-pressure lamp, such as a mercury lamp, from scattering out of the light source unit, in case the lamp should, for one reason or another, explode or be otherwise broken into small pieces.
  • the problem here is the net-like structure of the protective element, which probably remarkably reduces the luminosity of the lamp.
  • the light fixture cover comprises a lamp fixture body, peripheral resealable lip and an installation/removal tab.
  • the lamp fixture body has a hemispherical shape and circular outer boundary.
  • the peripheral lip is attached to the circular outer boundary of the body.
  • the installation/removal tab is attached to the peripheral lip so that manual installation/removal of the lamp fixture over the outer rim of the lamp fixture can be carried out.
  • the object of the invention is to eliminate the drawbacks connected to the above described lighting fixtures and particularly to their protective elements.
  • Another object of the invention is to realize a novel protection that is in particular suited to be used as an accessory for already installed lighting fixtures, in order to improve safety for instance in the production facilities of food industry.
  • a lighting fixture protection according to the invention is characterized by what is set forth in claim 1.
  • Dependent claims describe preferred embodiments of the invention.
  • the above described light fixture cover system teaches a press fit or snap-on attachment for a light fixture cover to a light fixture without screws, clips, clamps and/or other hardware to joint these two components together.
  • the cover is meant to arrange to the upper side of the light fixture as presented in the drawings of the patent application.
  • the known light fixture cover system has some problems.
  • This kind of press fit attachment does not offer a reliable and secure joint between the cover and the light fixture, especially when the cover is to be arrange below the light fixture (or to one side of the light fixture). Further, even if said press fit attachment is used in the mentioned arrangements, the attachment cannot apply in connection with a light-permeable protection in question. The reason is obvious: in the case a lamp in such a light fixture explodes, a sudden increase in pressure inside the cover and the light fixture ejects the cover out of the lighting fixture and so the cover with the small pieces of lamp glass fall down. Further, the structure of the light fixture cover is so weak that it cannot be utilized as a light-permeable protection, because it can simply break down because of lamp explosion.
  • a very large number of ventilation holes is included in the light fixture body to provide heat transfer outside of the lamp enclosure. Moreover, these holes prevent water, insects and other contamination from entering the lamp enclosure.
  • the holes are preferably formed by outward deformations.
  • the holes should be very small, otherwise water, insects and other contaminants cannot be kept outside the lamp enclosure. When the holes are tiny, they clog easily and ventilation effect decreases. Further the ventilation holes are perforated to the light fixture body, which is laborious process.
  • the invention relates to a light-permeable protection for a lighting fixture, which protection includes a light-permeable cupola part and a collar provided with fastening means for fastening the cupola part detachably to the lighting fixture, which collar is provided with at least one aperture, through which the ventilation in the interior of the protection is arranged to be carried out.
  • a dust filter is provided in connection with the aperture/apertures and the collar is provided with a pocket in which a plate-like, porous and elastic dust filter can be fitted.
  • the protection is a separate accessory that can be installed in existing industrial lamps or the like.
  • it can be purchased as an accessory for new lighting fixtures in industrial or exhibition facilities or in public facilities in general, either new facilities or facilities to be restored.
  • This makes it possible to raise the safety level in said facilities, because the risk of scattering glass splinters produced by possibly explosive lamps is eliminated.
  • This aspect is particularly important in the illumination of production facilities in the food industry. The spreading of tiny glass splinters in the foodstuffs treated in the production process is not desirable. It is, however, pointed out that a lighting fixture functions and can be used also without a protection according to the invention.
  • the advantage of the invention is that the ventilation in the interior of the protection and the reflector is arranged to be carried out through the aperture.
  • the air inside the protection and the reflector is heated and expanded, and through the aperture, the expanding air can be discharged out of the lighting fixture.
  • the lighting fixture is switched off, the situation is reversed, and air flows through the aperture into the interior of the lighting fixture.
  • the reflector of the lighting fixture can be a closed reflector, realized without any apertures.
  • the aperture is provided with a dust filter.
  • the cupola part is a revolution body with a curved surface, preferably an essentially hemispherical body.
  • the advantage of this kind of shape is that it endures, without being broken and/or detached, the next impact-like pressure wave following the breaking of the lamp.
  • the cupola part is made of plastic, such as acryl, polycarbonate or the like.
  • plastic such as acryl, polycarbonate or the like.
  • the invention also relates to a light source unit comprising a light-permeable protection of claim 1 or 2 and a lighting fixture, particularly a ceiling lamp or floodlight made for high spaces, said lighting fixture comprising a reflector having a light aperture and, as fitted inside the reflector, a replaceable electric light source, such as a mercury lamp, which protection is detachably fastened with fastening means to the reflector of the lighting fixture, so that it encompasses the light aperture of the reflector.
  • a light source unit comprising a light-permeable protection of claim 1 or 2 and a lighting fixture, particularly a ceiling lamp or floodlight made for high spaces
  • said lighting fixture comprising a reflector having a light aperture and, as fitted inside the reflector, a replaceable electric light source, such as a mercury lamp, which protection is detachably fastened with fastening means to the reflector of the lighting fixture, so that it encompasses the light aperture of the reflector.
  • the lighting fixture 2 is an industrial lamp installed in the ceiling, which lamp is used for illuminating high spaces, for example with a height of 5 - 20 m, for instance industrial or corresponding facilities.
  • the lighting fixture 2 comprises a reflector 3 and, as fitted therein, a replaceable electric light source 4, such as a mercury lamp, a high-pressure sodium lamp as well as mechanical and electric connecting elements 5 for connecting the lamp in the lighting fixture and further to an electricity source, advantageously the mains.
  • a support element 6 the lighting fixture 2 can be attached to the ceiling, but it can also be attached to the wall or to a pillar by suitable suspension elements.
  • the shape of the reflector 3 of the lighting fixture 2 is a rotation paraboloid, but it can also have some other geometrical shape, such as a truncated cone or the like, the cross-section of which can be a circle, an ellipse, a square, a rectangle or a combination of these.
  • the protection 1 is detachably attached in connection with the reflector 3, particularly in its light aperture 31, as is illustrated in Figures 1 and 3 .
  • the protection 1 is realized to be a separate accessory that includes a light-permeable cupola part 11 and a collar 12.
  • Fastening means 13 are provided for fastening the cupola part 11 of the collar 12 in the lower part of the reflector 3, particularly in the light aperture 31 of the reflector, so that it encompasses the light aperture 31.
  • the fastening means 13 are realized by means of screws 13a.
  • the screws 13a are arranged at regular angle intervals, for instance at intervals of 90 degrees, on the circumference of the collar 12, so that in the protection fastening step, they can be turned towards the collar 12 and the interior of the protection 1, for fastening the protection to the reflector, and respectively in the removal step, they can be turned outwards from the collar 12 and from the interior of the protection, for detaching the protection from the reflector in order to remove it.
  • the collar 12 of the protection 1 is annular in shape, and it is provided with a fastening edge 12a.
  • the fastening edge 12a forms, in the open orifice of the collar 12, an expansion in which the outer edge 32 encompassing the orifice 31 of the reflector 3 can be fitted, so that it is supported against the interior of the expansion.
  • the fastening edge 12a of the collar 12 is provided with a sealing 16, preferably a sealing strip.
  • the sealing 16 is compressed in between the outer edge 32 of the reflector 3 and the fastening edge 12a, so that it forms an air-tight lock between the interior and exterior that the reflector and the protection have in common.
  • the screws 13a serving as the fastening means 13 hold the reflector 3, by its outer edge 32, inside the fastening edge 12a, and consequently the protection 1 and the reflector 3 of the lighting fixture 2 mutually attached.
  • the fastening means 13 can be realized by means of a hoop and a latch arrangement.
  • the hoop is connected to the top part of the collar 12.
  • the protection 1 is attached in connection with the reflector 3
  • the hoop is tightened around the lower part of the reflector of the lighting fixture by means of one or several latches belonging to the latch arrangement.
  • the hoop is loosened by opening the latches, and respectively the protection can be detached from the reflector 3.
  • the collar 12 of the protection 1 is provided with at least one aperture 14. Through said aperture 14, the ventilation of the interior of the reflector 3 and the protection 1 is arranged to be carried out.
  • a dust filter 15 is provided in connection with the aperture/apertures 14.
  • the collar 12 is provided with a pocket 17, in which pocket a plate-like, porous and elastic dust filter can be fitted and easily replaced.
  • the cupola part 11 of the protection is a revolution body with a curved surface, preferably a body with an essentially hemispherical shape.
  • the cupola part 11 is made of plastic, such as acryl, polycarbonate or the like.
  • the invention also relates to a lighting fixture 2 that is provided with a protection 1 described above.
  • said lighting fixture 2 is a ceiling lamp or a floodlight made for high spaces, which lamp comprises a reflector 3 and as fitted therein, a replaceable electric light source 4, such as a mercury lamp, and a light-permeable protection 1 that is attached in connection with the reflector.
  • the protection 1 comprises a light-permeable cupola part 11 and a collar 12 provided with fastening means 13 for fastening the cupola part detachably in the reflector 3 of the lighting fixture, so that it encompasses the light aperture 31 of the reflector 3.
  • the protection 1 is preferably realized and fastened in the reflector 3 by methods and elements that are described in the specification and/or drawings above.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Cable Accessories (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
EP06118918A 2005-08-16 2006-08-15 Lighting fixture protection Not-in-force EP1754930B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20050827A FI118138B (fi) 2005-08-16 2005-08-16 Valaisimen suojus

Publications (2)

Publication Number Publication Date
EP1754930A1 EP1754930A1 (en) 2007-02-21
EP1754930B1 true EP1754930B1 (en) 2009-10-07

Family

ID=34896287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06118918A Not-in-force EP1754930B1 (en) 2005-08-16 2006-08-15 Lighting fixture protection

Country Status (4)

Country Link
EP (1) EP1754930B1 (fi)
AT (1) ATE445124T1 (fi)
DE (1) DE602006009590D1 (fi)
FI (1) FI118138B (fi)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9226058B2 (en) 2011-12-06 2015-12-29 Ronald Paul Harwood Media assembly for a structural support
CN109838724A (zh) * 2018-08-13 2019-06-04 河南省豫石地质勘查技术有限公司 一种矿用防尘灯

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB194113A (en) * 1922-02-14 1923-03-08 Joseph Webber Improvements in lamp globes
US5169228A (en) * 1990-07-03 1992-12-08 Leuchtenfabrik Cold light mirror lamp
US6095662A (en) * 1997-05-19 2000-08-01 Hubbell Incorporated Lighting fixture with emergency illuminating device
FR2790539B1 (fr) * 1999-03-02 2001-06-01 Clen Dispositif d'eclairage, en particulier pour bureaux
JP3931529B2 (ja) 2000-04-26 2007-06-20 ウシオ電機株式会社 光源ユニット
US7048414B2 (en) * 2003-04-11 2006-05-23 Martin Thomas Weber Light fixture cover system and method
US20050018432A1 (en) * 2003-07-25 2005-01-27 Buschmann Jeffrey P. Reflector lamp with a high domed lens

Also Published As

Publication number Publication date
FI118138B (fi) 2007-07-13
EP1754930A1 (en) 2007-02-21
FI20050827A0 (fi) 2005-08-16
ATE445124T1 (de) 2009-10-15
DE602006009590D1 (de) 2009-11-19
FI20050827A (fi) 2007-02-17

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