US3812342A - Lighting fixture lens - Google Patents

Lighting fixture lens Download PDF

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Publication number
US3812342A
US3812342A US00325566A US32556673A US3812342A US 3812342 A US3812342 A US 3812342A US 00325566 A US00325566 A US 00325566A US 32556673 A US32556673 A US 32556673A US 3812342 A US3812342 A US 3812342A
Authority
US
United States
Prior art keywords
light
bulb
housing
opening
film
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.)
Expired - Lifetime
Application number
US00325566A
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English (en)
Inventor
A Mcnamara
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.)
Esquire Inc
Original Assignee
Esquire Inc
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 Esquire Inc filed Critical Esquire Inc
Priority to US00325566A priority Critical patent/US3812342A/en
Priority to CA180,747A priority patent/CA1009634A/en
Priority to GB4420273A priority patent/GB1406199A/en
Priority to AU60801/73A priority patent/AU477731B2/en
Priority to IT52985/73A priority patent/IT996279B/it
Priority to FR7339249A priority patent/FR2214863B1/fr
Priority to BE137540A priority patent/BE807074A/fr
Priority to ES420593A priority patent/ES420593A1/es
Priority to DE2401184A priority patent/DE2401184C3/de
Priority to BR412/74A priority patent/BR7400412D0/pt
Application granted granted Critical
Publication of US3812342A publication Critical patent/US3812342A/en
Assigned to WIDE-LITE INTERNATIONAL CORPORATION reassignment WIDE-LITE INTERNATIONAL CORPORATION ASSIGNS THE ENTIRE INTEREST. SUBJECT TO AGREEMENT DATED JUNE 30,1983 Assignors: ESQUIRE, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings

Definitions

  • a lighting fixture combination including a housing enclosing at least one bulb and having an opening for light and a housing window across the opening com prising a thin film of fluorocarbon, preferably Teflon FEP. Also disclosed are various means for deforming the thin film to cause it to be stretched tautly across the opening and be secured securely in place.
  • the window opening closed by a pane of clear glass may be approximately two feet by two feet.
  • the entire lighting fixture may be one of a plurality mounted in ahigh ceiling over a laboratory, industrial process area, a warehouseor similar area.
  • the lens material that has been discovered and which is revealed herein is a flexible thin film material.
  • the primary advantages of glass as a fixture closure or lens include its low cost, its ready availability, its resistance to high operating temperatures, such as emanate from high wattage lamps, its resistance to changes in color and opaqueness, even over a prolonged period of time, and its uniform light transmittance qualities over the full range ofthe visible spectrum.
  • Glass as a closure for such a fixture has a number of disadvantages, however. First, it is breakable. Should something accidentally strike the glass or should the bulb within the fixture explode, the glass is very likely to break at not only an inconvenience to the persons working in the area, but also creating a hazard. Socalled non-breakable tempered or safety glass is available and is used. .But, even tempered glass does break. In such case, beads result, rather than jagged pieces, but even beads can be hazardous.
  • glass is thought of as being relatively slick and therefore resistant to the build up of dust.
  • it reallyv does not take very long for an appreciable amount to accumulate.
  • the rapid accumulation of dust results in reduced illumination from the fixture anda requirement to clean the fixture. The more often someone has to clean the fixture, the more expensive is the maintenance.
  • the glass used in a fixture such as the one described above is also an appreciable percentage of thee overall weight of the fixture.
  • a lighter window closure would effect a reduction in manufacturing and shipping costs.
  • Fluoroplastics or fluorocarbon polymers, all have the property of having a resistance to high temperatures, being light weight in small thicknesses and being unbreakable.
  • Some fluoroplastics, and in particular Teflon FEP (a fluorocarbon copolymer made by polymerizing a mixture of tetrafluoroethylene and hexafluoropropylene), have the additional properties of being nearly transparent in thin-film form (no thicker than about 10 mils), having a high and uniform lightspectrum transmittance,.having a long-term aging quality without appreciable discoloring, and having an extremely low coefficient of friction and therefore providing a dust resistant surface. It has been discovered that a lighting fixture closure made of such a material has sufficiently equal or superior qualities in all of its necessary characteristics that it is an overall superior closure to that of glass.
  • FIG. 1 is an oblique view of a typical high intensity discharge lamp fixtureincluding a lens in accordance with the present invention, the lens or closure assembly being illustrated in the partly opened position.
  • FIG. 2 is a partial cross sectional illustration of one method ofmounting the lens of the present invention.
  • FIG. 3 is a partial cross sectional illustration of an other method of mounting the lens of the present invention.
  • FIG. 4 is a partial cross sectional iilustration of still another method of mounting the lens of the present in- DESCRIPTION OF PREFERRED EMBODIMENTS
  • a typical high intensity discharge lamp fixture is shown housing a high intensity discharge lamp.
  • a closure or lensassembly 14 is typically hinged at one end of window 13 to permit access to the fixture for changing a burned-out lamp 12.
  • Assembly 14 comprises a frame structure 16 andlens 18.
  • Lens l8 to be more fully hereinafter described is a non-self-supporting or non-rigidthin film of fluoroplastic material capable of being at least slightly stretched. Typically, the film is on the order of 5 mil thick.
  • the term lens is not used herein to necessarily imply optical magnification or demagnification, but is used in the sense as that term is commonly used in the lighting industry to refer to the window or window pane closure of a lighting fixture.
  • FIGS. 2-7 Several alternative methods of attaching lens 18 into frame 16 are illustrated in FIGS. 2-7. These frame structures are referred to generally in FIGS. 2-5 as frames 16a, 16b, 16c and 16d, respectively, and in FIGS. 6-and 7 as frame 16a.
  • FIG. 2 illustrates a cross section of a frame structure 20 made of material capable of at least some bending without breaking, such as aluminum.
  • Frame 20 has a jaw-like receiving opening 22, the opposing surfaces thereof being at least slightly rippled in a mating relationship.
  • the lens is cut to size and inserted into opening 22. It is desirable that the film does not extend all of the way into the opening. This prevents the film from wrinkling.
  • the jaws of opening 22 are then squeezed together to securely clamp film 18 therein, the internal rippling causing the film to slightly stretch so that the film becomes taut in the frame.
  • the rippling causes a better gripping than non-rippled surfaces.
  • FIG. 3 shows a frame 30 with a groove 32 therein large enough for accommodating a wire form 34 as well as lens film 18.
  • a lip 36 is formed atone side of groove 32.
  • wire form 34 is pressed into groove 32 carrying film 18 with it. Lip 36 is then bent over wire form 34 to secure film 18 in place. Again, as with frame 20, film.18 is slightly stretched during the securing operation,- to draw film 18 slightly taut.
  • FIG. 4 illustrates still another frame 40 having a groove 42 for receiving a mating tongue 44 formed in facing piece 46.
  • Facing piece 46 has a plurality of holes 48 therethrough, preferably atthe location of the v tongue, and frorne 40 has an equal number of internally threaded, matingly located screw holes.
  • facing 46 is pressed so as to squeeze and somewhat deformably stretch film 18 between tongue 44 and groove 42. Screws 49 are then tightened through holes 48 into the receiving screw holes in frame 40 to complete the securing.
  • FIG. 5 illustrates yet another method of attaching film 18 to asuitable frame.
  • a two part frame comprising outside piece 50 and inside piece 52 are capable of press fitting together in the direction shown by the arrows to secure film 18 therebetween, much in the manner of operation of an embroidery'hoop. Again, when the frame pieces are squeezed together, the operation stretches film l8 taut to remove wrinkles that might otherwise be present.
  • FIGS. 6 and 7 illustrates a convenient method of attaching film 18 to a frame originally designed to accommodate glass.
  • frame l6e comprises an L-shaped peripheral frame structure 60 onto which is pressfitted a grommet 62 made of rubber or other suitable material.
  • Grommet 62 offers a crosssectional U-shaped opening to the inside ofthe frame for accommodating glass 64.
  • a two-piece insert is used that is roughly the same thickness as glass 64. This insert in cludes larger piece 66, which is approximately I shaped and smaller piece 68, which has a tongue for wedging into the groove portion of .I-shape d piece 66. .Ishaped piece 66 is also rippled slightly on the inside of the leg of the J.
  • film 18 is stretched over the long side of the .I of piece 66 and piece 68 is wedged into place, holding film 18 between it and piece 66 and stretching film l8 slightly.
  • the ripples help prevent slippage of film 18.
  • Suitable materials should have all of the following characteristics: be unbreakable and impact resistant; resistant to high temperatures beyond the range of use application, and especially be nonflammable, non-toxic and noncontaminating; possessive of a low coefficient of friction (and therefore be resistant to dust build up); be translucent, and in some applications, be at least nearly transparent; be essentially inert to environmental conditions of use for prolonged periods of time, and particularly be essentially immune to ultraviolet degradation when used with a lamp such as a fluoroescent or mercury vapor lamp, which emits a large amount of such radiation; be possessive of good transmittance qualities over the full visible spectrum, and preferably well into both the ultraviolet and infrared ranges; and be at least costcompetitive with glass in the use dimension.
  • Teflon FEP Teflon FEP
  • Teflon is a registered trademark of E. I. duPont de Nemurs, Inc.
  • Teflon PE? is a fluorocarbon copolymer made by polymerizing mixtures of tetrafluoroethylene and hexafluoropropylene (which are a fluorinated ethylene and a fluorinated propylene).
  • the properties of the final polymer can be varied slightly by changing the ratio of the two monomers.
  • Teflon PEP is meltextrudable so that thin-film production is readily accomplished.
  • Teflon FEP is readily produced in thicknesses of mil and less. In fact, a5 mil thickness has been found to be the optimum thickness as a compromise between strength and transmittance for Teflon FEP. At this thickness, the strength is still ample to resist tearing even upon accidental impact. On the other hand, it exhibits only a very, very slight bluish cast and is still essentially transparent. In fact, the transmittance of Teflon FEP at this thickness is greater than for one-fourth inch glass, the preferred thickness for glass which is subjected to tempering.
  • Teflon and particularly Teflon FEP, is the most inert of all plastics known, and is virtually immune to all normal environmental conditions, including direct exposure to ultra-violet rays for prolonged periods of time.
  • Teflon FEP withstands temperatures from 270C to +205C. In outdoor exposure testing in Florida, there was no measurable change in the material in any regards after a 10-year test.
  • Teflon FEP may be secured as a lens in any of the frame structures described above.
  • Teflon FEP may also be invisibly surface treated for bonding one or both sides thereof with adhesives. Therefore, its superior anti-stick property does not preclude securing to a frame as a closure via such an adhesive, if desired.
  • Teflon PE is not the only Teflon material that is 6 suitable, however. Teflon TFE may also be used, particularly where it is not a requirement that the lens be nearly transparent, such as where glazed or frosted glass would otherwise be used.
  • Teflon TF E is a fluorocarbon homopolymer called polytetrafluoroethylene, tetrafluoroethylene (TFE) being a single monomer which is polymerized to give the polymer. Since it is the only monomer, the polymer is a homopolymer.
  • Teflon TFE has essentially all of the desirable properties of Teflon FEP except for its translucent quality. It is a milky white at thicknesses of approximately 5 mil. It is also a little more expensive to produce in sheet or lens form, since to produce sheets, it is normal to shave a solid block, rather than to merely extrude the mate'- rial in sheet form, as with Teflon FEP.
  • .Teflon FEP and TFE are both considered generically as fluorocarbon polymers and are known commercially as fluoro-plastics.
  • Other fluorocarbon polymers exhibiting qualities that would indicate they are acceptable as lens materials are Tefzel, which is a copolymer of ethylene and tetrafluoroethylene (referred to generically as ETFE); Kel-F, which is polychlorotrifluoroethylene (CTFE) and polyvinylidene fluoride.
  • CTFE polychlorotrifluoroethylene
  • polyvinylidene fluoride polyvinylidene fluoride.
  • polymethylpentene and polysulfone also exhibit temperature, optical and other characteristics that would indicate their acceptability as lens materials.
  • a plastic sheet may retain'a static charge during cleaning or otherwise, that can result in dust being attractedthereto. Having a low coefflcient of friction does not prevent or eliminate this problem. Therefore, after cleaning, either the charge should be discharged, or the'surface cleaned or treated with a substance that substantially reduces the possibility of a charge being retained.
  • the invention is not limited thereto.
  • several frame structures are revealed, but other frame holding techniques operating on similar principles are suggested.
  • the lens material may be heat sealed to a frame, the act of sealing also causing a slight shrinkage of the material that desirably stretches the material suitably across the window of the frame.
  • Many other modifications may also be made and will become apparent to those skilled in the art.
  • a lighting fixture combination comprising:
  • a housing for enclosingat least one light bulb therein that emits light in the visible spectrum, such that said bulb is sufficientlyrecessed so that the plane of an opening through which light emanates does not intersect said bulb;
  • a housing window comprising a thin film of fluorocarbon copolymer combining tetrafluoroethylene and hexafluoropropylene stretched across said opening in said plane.
  • a lighting fixture combination comprising:
  • a housing for enclosing at leas'tone light bulb therein that emits light in the visible spectrum such that said bulb is sufficiently recessed that the plane of an opening through which light emanates does not intersect said bulb;
  • a housing window comprising a non-self-supporting film of fluorocarbon copolymer combining tetrafluoroethylene and hexafluoropropylene secured across said opening in said plane.
  • housing window means comprising:
  • a lighting fixture combination comprising:
  • a lighting fixture combination comprising:
  • a housing for enclosing at least one light bulb therein

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
US00325566A 1973-01-22 1973-01-22 Lighting fixture lens Expired - Lifetime US3812342A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US00325566A US3812342A (en) 1973-01-22 1973-01-22 Lighting fixture lens
CA180,747A CA1009634A (en) 1973-01-22 1973-09-11 Lighting fixture lens
GB4420273A GB1406199A (en) 1973-01-22 1973-09-20 Lighting fixtures
AU60801/73A AU477731B2 (en) 1973-01-22 1973-09-27 Lighting fixture lens
IT52985/73A IT996279B (it) 1973-01-22 1973-10-08 Lente per accessorio di illumina zione
FR7339249A FR2214863B1 (fr) 1973-01-22 1973-11-05
BE137540A BE807074A (fr) 1973-01-22 1973-11-08 Dispositif d'eclairage
ES420593A ES420593A1 (es) 1973-01-22 1973-11-16 Un aparato de iluminacion.
DE2401184A DE2401184C3 (de) 1973-01-22 1974-01-11 Abdeckung für ein Lampengehäuse
BR412/74A BR7400412D0 (pt) 1973-01-22 1974-01-21 Dispositivo e iluminacao e caixa e vidraca para o mesmo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00325566A US3812342A (en) 1973-01-22 1973-01-22 Lighting fixture lens

Publications (1)

Publication Number Publication Date
US3812342A true US3812342A (en) 1974-05-21

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ID=23268418

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Application Number Title Priority Date Filing Date
US00325566A Expired - Lifetime US3812342A (en) 1973-01-22 1973-01-22 Lighting fixture lens

Country Status (9)

Country Link
US (1) US3812342A (fr)
BE (1) BE807074A (fr)
BR (1) BR7400412D0 (fr)
CA (1) CA1009634A (fr)
DE (1) DE2401184C3 (fr)
ES (1) ES420593A1 (fr)
FR (1) FR2214863B1 (fr)
GB (1) GB1406199A (fr)
IT (1) IT996279B (fr)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011874A (en) * 1973-06-16 1977-03-15 Kureha Kagaku Kogyo Kabushiki Kaisha Dorno ray transmitting sheet
USD243875S (en) 1976-02-23 1977-03-29 Schwartz Sheldon D Light bulb reflector
US4240853A (en) * 1978-10-20 1980-12-23 Esquire, Inc. Lens closure for light fixture and method for attachment
DE3412312A1 (de) * 1984-04-03 1985-10-03 Ceag Licht- Und Stromversorgungstechnik Gmbh, 4770 Soest Dichtung
US20050238550A1 (en) * 2002-03-20 2005-10-27 Claes-Goran Granqvist Pollutant decomposition device
US20050259863A1 (en) * 2000-05-04 2005-11-24 Daniel Freifeld Repetitive inspection system with intelligent tools
US20060133094A1 (en) * 2002-01-23 2006-06-22 Yang An X Lamps
USD637752S1 (en) * 2010-08-06 2011-05-10 Modern Woodworks, Inc. LED grow light
EP2642197A1 (fr) * 2012-03-22 2013-09-25 Trilux GmbH & Co. KG Couplage intérieur pour un éclairage de protection supérieure
USD715986S1 (en) * 2013-04-08 2014-10-21 Flos S.P.A. Suspension lamp
USD760420S1 (en) * 2015-01-15 2016-06-28 Hinkley Lighting, Inc. Lighting fixture
WO2018237294A3 (fr) * 2017-06-22 2019-01-31 DMF, Inc. Appareil d'éclairage à montage en surface à profil mince
USD848375S1 (en) 2015-10-05 2019-05-14 DMF, Inc. Electrical junction box
US10408395B2 (en) 2013-07-05 2019-09-10 DMF, Inc. Recessed lighting systems
USD864877S1 (en) 2019-01-29 2019-10-29 DMF, Inc. Plastic deep electrical junction box with a lighting module mounting yoke
US10488000B2 (en) 2017-06-22 2019-11-26 DMF, Inc. Thin profile surface mount lighting apparatus
US10551044B2 (en) 2015-11-16 2020-02-04 DMF, Inc. Recessed lighting assembly
US10563850B2 (en) 2015-04-22 2020-02-18 DMF, Inc. Outer casing for a recessed lighting fixture
US10591120B2 (en) 2015-05-29 2020-03-17 DMF, Inc. Lighting module for recessed lighting systems
US10663153B2 (en) 2017-12-27 2020-05-26 DMF, Inc. Methods and apparatus for adjusting a luminaire
US10753558B2 (en) 2013-07-05 2020-08-25 DMF, Inc. Lighting apparatus and methods
USD901398S1 (en) 2019-01-29 2020-11-10 DMF, Inc. Plastic deep electrical junction box
USD902871S1 (en) 2018-06-12 2020-11-24 DMF, Inc. Plastic deep electrical junction box
USD905327S1 (en) 2018-05-17 2020-12-15 DMF, Inc. Light fixture
USD907284S1 (en) 2014-02-18 2021-01-05 DMF, Inc. Module applied to a lighting assembly
US10975570B2 (en) 2017-11-28 2021-04-13 DMF, Inc. Adjustable hanger bar assembly
WO2021087295A1 (fr) * 2019-10-30 2021-05-06 Cr Packaging Llc Récipient de protection à l'épreuve des enfants ayant une fenêtre intégrée
US11060705B1 (en) 2013-07-05 2021-07-13 DMF, Inc. Compact lighting apparatus with AC to DC converter and integrated electrical connector
US11067231B2 (en) 2017-08-28 2021-07-20 DMF, Inc. Alternate junction box and arrangement for lighting apparatus
US11231154B2 (en) 2018-10-02 2022-01-25 Ver Lighting Llc Bar hanger assembly with mating telescoping bars
US11255497B2 (en) 2013-07-05 2022-02-22 DMF, Inc. Adjustable electrical apparatus with hangar bars for installation in a building
US11274821B2 (en) 2019-09-12 2022-03-15 DMF, Inc. Lighting module with keyed heat sink coupled to thermally conductive trim
US11306903B2 (en) 2020-07-17 2022-04-19 DMF, Inc. Polymer housing for a lighting system and methods for using same
US11391442B2 (en) 2018-06-11 2022-07-19 DMF, Inc. Polymer housing for a recessed lighting system and methods for using same
US11435064B1 (en) 2013-07-05 2022-09-06 DMF, Inc. Integrated lighting module
USD966877S1 (en) 2019-03-14 2022-10-18 Ver Lighting Llc Hanger bar for a hanger bar assembly
USD970081S1 (en) 2018-05-24 2022-11-15 DMF, Inc. Light fixture
US11585517B2 (en) 2020-07-23 2023-02-21 DMF, Inc. Lighting module having field-replaceable optics, improved cooling, and tool-less mounting features
USD990030S1 (en) 2020-07-17 2023-06-20 DMF, Inc. Housing for a lighting system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2210698C2 (ru) * 2000-02-25 2003-08-20 Общество с ограниченной ответственностью "Агентство наукоемких технологий" Осветительный прибор (варианты)
DE10156325B4 (de) * 2001-11-19 2006-10-05 Trilux-Lenze Gmbh + Co Kg Vorrichtung zur Befestigung einer ein Leuchtgehäuse abschließenden Scheibe
DE102013103052A1 (de) * 2013-03-26 2014-10-02 Hella Kgaa Hueck & Co. Leuchte

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798942A (en) * 1954-01-27 1957-07-09 David H Mason Illuminating fixture with changeable screen
GB769947A (en) * 1955-04-14 1957-03-13 Stanley Clifford Baker Improvements in and relating to shades for electric lights
US3451876A (en) * 1964-05-28 1969-06-24 Ksh Inc Plastic light-transmitting panel

Cited By (71)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4011874A (en) * 1973-06-16 1977-03-15 Kureha Kagaku Kogyo Kabushiki Kaisha Dorno ray transmitting sheet
USD243875S (en) 1976-02-23 1977-03-29 Schwartz Sheldon D Light bulb reflector
US4240853A (en) * 1978-10-20 1980-12-23 Esquire, Inc. Lens closure for light fixture and method for attachment
DE3412312A1 (de) * 1984-04-03 1985-10-03 Ceag Licht- Und Stromversorgungstechnik Gmbh, 4770 Soest Dichtung
US20050259863A1 (en) * 2000-05-04 2005-11-24 Daniel Freifeld Repetitive inspection system with intelligent tools
US20060133094A1 (en) * 2002-01-23 2006-06-22 Yang An X Lamps
US7255461B2 (en) * 2002-01-23 2007-08-14 Aurora Limited Lamp reflector having a plurality of reflecting elements
US20050238550A1 (en) * 2002-03-20 2005-10-27 Claes-Goran Granqvist Pollutant decomposition device
US7731915B2 (en) * 2002-03-20 2010-06-08 Chromogenics Ab Pollutant decomposition device
USD637752S1 (en) * 2010-08-06 2011-05-10 Modern Woodworks, Inc. LED grow light
EP2642197A1 (fr) * 2012-03-22 2013-09-25 Trilux GmbH & Co. KG Couplage intérieur pour un éclairage de protection supérieure
USD715986S1 (en) * 2013-04-08 2014-10-21 Flos S.P.A. Suspension lamp
US10408395B2 (en) 2013-07-05 2019-09-10 DMF, Inc. Recessed lighting systems
US11085597B2 (en) 2013-07-05 2021-08-10 DMF, Inc. Recessed lighting systems
US10816148B2 (en) 2013-07-05 2020-10-27 DMF, Inc. Recessed lighting systems
US11060705B1 (en) 2013-07-05 2021-07-13 DMF, Inc. Compact lighting apparatus with AC to DC converter and integrated electrical connector
US10982829B2 (en) 2013-07-05 2021-04-20 DMF, Inc. Adjustable electrical apparatus with hangar bars for installation in a building
US12000562B2 (en) 2013-07-05 2024-06-04 DMF, Inc. Lighting assembly with AC to DC converter and heat-sinking housing
US12352405B2 (en) 2013-07-05 2025-07-08 DMF, Inc. Adjustable electrical apparatus with hangar bars for installation in a building
US10753558B2 (en) 2013-07-05 2020-08-25 DMF, Inc. Lighting apparatus and methods
US11255497B2 (en) 2013-07-05 2022-02-22 DMF, Inc. Adjustable electrical apparatus with hangar bars for installation in a building
US11808430B2 (en) 2013-07-05 2023-11-07 DMF, Inc. Adjustable electrical apparatus with hangar bars for installation in a building
US11435064B1 (en) 2013-07-05 2022-09-06 DMF, Inc. Integrated lighting module
USD907284S1 (en) 2014-02-18 2021-01-05 DMF, Inc. Module applied to a lighting assembly
USD924467S1 (en) 2014-02-18 2021-07-06 DMF, Inc. Unified casting light module
US11028982B2 (en) 2014-02-18 2021-06-08 DMF, Inc. Adjustable lighting assembly with hangar bars
USD939134S1 (en) 2014-02-18 2021-12-21 DMF, Inc. Module applied to a lighting assembly
USD760420S1 (en) * 2015-01-15 2016-06-28 Hinkley Lighting, Inc. Lighting fixture
USD870950S1 (en) * 2015-01-15 2019-12-24 Hinkley Lighting, Inc. Lighting fixture
US11435066B2 (en) 2015-04-22 2022-09-06 DMF, Inc. Outer casing for a recessed lighting fixture
US11118768B2 (en) 2015-04-22 2021-09-14 DMF, Inc. Outer casing for a recessed lighting fixture
US10563850B2 (en) 2015-04-22 2020-02-18 DMF, Inc. Outer casing for a recessed lighting fixture
US10591120B2 (en) 2015-05-29 2020-03-17 DMF, Inc. Lighting module for recessed lighting systems
US11022259B2 (en) 2015-05-29 2021-06-01 DMF, Inc. Lighting module with separated light source and power supply circuit board
USD925109S1 (en) 2015-05-29 2021-07-13 DMF, Inc. Lighting module
USD944212S1 (en) 2015-10-05 2022-02-22 DMF, Inc. Electrical junction box
USD851046S1 (en) 2015-10-05 2019-06-11 DMF, Inc. Electrical Junction Box
USD848375S1 (en) 2015-10-05 2019-05-14 DMF, Inc. Electrical junction box
US11242983B2 (en) 2015-11-16 2022-02-08 DMF, Inc. Casing for lighting assembly
US11668455B2 (en) 2015-11-16 2023-06-06 DMF, Inc. Casing for lighting assembly
US10551044B2 (en) 2015-11-16 2020-02-04 DMF, Inc. Recessed lighting assembly
US10488000B2 (en) 2017-06-22 2019-11-26 DMF, Inc. Thin profile surface mount lighting apparatus
US11293609B2 (en) 2017-06-22 2022-04-05 DMF, Inc. Thin profile surface mount lighting apparatus
US11047538B2 (en) 2017-06-22 2021-06-29 DMF, Inc. LED lighting apparatus with adapter bracket for a junction box
WO2018237294A3 (fr) * 2017-06-22 2019-01-31 DMF, Inc. Appareil d'éclairage à montage en surface à profil mince
US10663127B2 (en) 2017-06-22 2020-05-26 DMF, Inc. Thin profile surface mount lighting apparatus
US11649938B2 (en) 2017-06-22 2023-05-16 DMF, Inc. Thin profile surface mount lighting apparatus
USD945054S1 (en) 2017-06-22 2022-03-01 DMF, Inc. Light fixture
US12169053B2 (en) 2017-08-28 2024-12-17 DMF, Inc. Alternate junction box and arrangement for lighting apparatus
US11067231B2 (en) 2017-08-28 2021-07-20 DMF, Inc. Alternate junction box and arrangement for lighting apparatus
US10975570B2 (en) 2017-11-28 2021-04-13 DMF, Inc. Adjustable hanger bar assembly
US11448384B2 (en) 2017-12-27 2022-09-20 DMF, Inc. Methods and apparatus for adjusting a luminaire
US10663153B2 (en) 2017-12-27 2020-05-26 DMF, Inc. Methods and apparatus for adjusting a luminaire
USD905327S1 (en) 2018-05-17 2020-12-15 DMF, Inc. Light fixture
USD970081S1 (en) 2018-05-24 2022-11-15 DMF, Inc. Light fixture
US11391442B2 (en) 2018-06-11 2022-07-19 DMF, Inc. Polymer housing for a recessed lighting system and methods for using same
USD903605S1 (en) 2018-06-12 2020-12-01 DMF, Inc. Plastic deep electrical junction box
USD902871S1 (en) 2018-06-12 2020-11-24 DMF, Inc. Plastic deep electrical junction box
US11231154B2 (en) 2018-10-02 2022-01-25 Ver Lighting Llc Bar hanger assembly with mating telescoping bars
USD864877S1 (en) 2019-01-29 2019-10-29 DMF, Inc. Plastic deep electrical junction box with a lighting module mounting yoke
USD901398S1 (en) 2019-01-29 2020-11-10 DMF, Inc. Plastic deep electrical junction box
USD966877S1 (en) 2019-03-14 2022-10-18 Ver Lighting Llc Hanger bar for a hanger bar assembly
US11274821B2 (en) 2019-09-12 2022-03-15 DMF, Inc. Lighting module with keyed heat sink coupled to thermally conductive trim
US12546465B2 (en) 2019-09-12 2026-02-10 DMF, Inc. Lighting module with keyed heat sink coupled to thermally conductive trim
US12077354B2 (en) 2019-10-30 2024-09-03 Cr Packaging Llc Child resistant container having integrated window
WO2021087295A1 (fr) * 2019-10-30 2021-05-06 Cr Packaging Llc Récipient de protection à l'épreuve des enfants ayant une fenêtre intégrée
USD990030S1 (en) 2020-07-17 2023-06-20 DMF, Inc. Housing for a lighting system
US11306903B2 (en) 2020-07-17 2022-04-19 DMF, Inc. Polymer housing for a lighting system and methods for using same
US12209736B2 (en) 2020-07-17 2025-01-28 DMF, Inc. Polymer housing for a lighting system and methods for using same
US11585517B2 (en) 2020-07-23 2023-02-21 DMF, Inc. Lighting module having field-replaceable optics, improved cooling, and tool-less mounting features
US12372222B2 (en) 2020-07-23 2025-07-29 DMF, Inc. Lighting module having field-replaceable optics, improved cooling, and tool-less mounting features

Also Published As

Publication number Publication date
FR2214863B1 (fr) 1978-11-17
ES420593A1 (es) 1976-07-01
CA1009634A (en) 1977-05-03
FR2214863A1 (fr) 1974-08-19
IT996279B (it) 1975-12-10
AU6080173A (en) 1975-03-27
DE2401184B2 (de) 1980-10-23
DE2401184C3 (de) 1981-07-02
BE807074A (fr) 1974-03-01
DE2401184A1 (de) 1974-07-25
BR7400412D0 (pt) 1974-11-05
GB1406199A (en) 1975-09-17

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Owner name: WIDE-LITE INTERNATIONAL CORPORATION, P.O. BOX 606,

Free format text: ASSIGNS THE ENTIRE INTEREST. SUBJECT TO AGREEMENT DATED JUNE 30,1983;ASSIGNOR:ESQUIRE, INC.;REEL/FRAME:004190/0815

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