US3457399A - Luminaire - Google Patents

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Publication number
US3457399A
US3457399A US530214A US3457399DA US3457399A US 3457399 A US3457399 A US 3457399A US 530214 A US530214 A US 530214A US 3457399D A US3457399D A US 3457399DA US 3457399 A US3457399 A US 3457399A
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Prior art keywords
reflector
air
housing
luminaire
filter
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US530214A
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English (en)
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Philip R Milroy
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General Electric Co
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General Electric Co
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    • 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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • 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
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/026—Fastening of transformers or ballasts
    • 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
    • F21V17/107—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 using hinge joints
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/15—Thermal insulation
    • 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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • 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
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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

Definitions

  • the present invention relates to luminaires, and more particularly concerns luminaires having sealed optical systems protected from the entry of contaminating materials in the atmosphere.
  • Luminaires of known type such as those used for street lighting and other purposes, are subject to the disadvantage that when installed in an industrial or other environment having atmospheres containing impurities or contaminants of various kinds, the illuminating and optical systems of the luminaires become dulled or degraded by deposits of the impurities on their surfaces, resulting in a reduced level of illumination produced thereby.
  • Even when gaskets are used between the joints of the luminaire parts the contaminated air passes into and out of the interior of the optical system. Such movement of the air may be due to the differential pressures which are built up between the interior and the exterior of the optical system by variation in temperature within the luminaire during the operating and non-operating cycles.
  • providing a completely hermetic seal for known types of luminaire optical systems involves practical and economic difliculties due to the elevated temperatures of modern luminaires, the differential pressures which develop therein during operation and other factors.
  • Still another object of the invention is to provide a combined filter and sealing system of the above type which is readily adaptable for application to a wide variety of illuminating devices.
  • the present invention in one of its aspects relates to a luminaire comprising, in combination, a reflector and a refractor separably secured together and forming a closed optical system, a lamp aratent O 3,457,399 Patented July 22, 1969 ranged within the closed optical system, resilient sealing means between the reflector and refractor forming an airtight seal for the closed optical system, and air-permeable purifying filter means inserted into the closed optical system for filtering the air passing thereinto by removal of solid and gaseous impurities contained therein, the lamp during operation heating the air in the closed optical system to an elevated temperature, whereby heated air is expelled outwardly through the filter during operation of the lamp, and cool air is drawn inwardly through the filter and purified thereby when the lamp is not operating.
  • FIGURE 1 is a view in elevation, partly broken away, of a street lighting luminaire embodying the present invention
  • FIGURE 2 is an enlarged detailed view in cross section of a portion of the FIGURE 1 luminaire showing the seal between the luminaire reflector and refractor of th FIGURE 1 device;
  • FIGURE 3 is a plan view of the rear portion of the refractor showing the refractor retaining means
  • FIGURE 4 is a detailed view in cross section of a portion of the FIGURE 1 luminaire showing the sealing and air filter means arranged in accordance with the invention
  • FIGURE 5 is a perspective view of the rear portion of the structure shown in FIGURE 4.
  • FIGURE 6 is a perspective view of the filter device employed in the FIGURE 1 luminaire
  • FIGURE 7 is a perspective view of a different type of luminaire, partly broken away, which may embody the present invention.
  • FIGURE 8 is an enlarged fragmentary view, partly in section, of the FIGURE 7 luminaire showing the sealing arrangement for the optical system;
  • FIGURE 9 is a detailed view of a rim portion of the FIGURE 7 luminaire showing the seal arrangement and latch means for the transparent closure.
  • a street lighting luminaire comprising an elongated upper housing 1 adapted to be mounted at its rear end on a pipe support 7 and having secured therein at its front portion a concave reflector 2, typically of aluminum, having a specular interior reflecting surface facing downwardly towards the bottom opening of housing 1.
  • the housing opening is closed by a bowlshaped light transmitting globe or refractor 3 mounted in a ring-shaped retaining frame 4 which is swingably connected at its rear end to housing 1 by hinge means 5 which pivots on transverse support member 25, and is releasably attached at its front end to housing 1 by latch means 6.
  • Reflector 2 is secured to housing 1 by means of screws at its front end, such as screw 2a threadedly engaging a depending boss 1a in housing 1. At its rear end, reflector 2 is releasably mounted by means of rearwardly projecting tangs 2b (see FIGURES 4 and 5) which are inserted into slots in transverse support member 25 secured to housing 1, as more fully described and shown in the abovementioned co-pending application.
  • refractor ring 4 with refractor 3 retained therein may be swung downwardly about hinge 5 to provide access to the interior of the luminaire housing for re-lamping or other servicing operations.
  • refractor 4 Upon closing refractor 4 and latching it to housing 1, re-
  • refractor 3 is formed with a flange 3a extending around its rim and resting upon annular ridge 4b of ring 4 which extends around the opening in the latter in which refractor 3 is received.
  • the front end of refractor 3 is held in place on ring 4 by a plurality of inwardly projecting retaining members 9 integral with outer ridge 4:: of ring 4 and engaging portions of flange 3a of refractor 3.
  • Formed on the upper edge of refractor 3 is an annular bead 3b which in the closed position of refractor retaining ring 4 engages and compresses gasket 7 attached to reflector 2.
  • refractor retaining ring 4 has a refractor retaining clip 8 pivotally secured therto adjacent the rear portion of refractor 3.
  • clip 8 is turned from the open position (shown in broken lines) to the locking position (shown in continuous lines) in which it overlaps flange 3a of refractor 3, thereby retaining the refractor in assembly with ring 4.
  • Reflector 2 is formed with a peripheral flange 2a (see FIGURE 2) which overlies the rim of refractor 3 in the closed position.
  • Gasket 7 which provides a seal between reflector 2 and refractor 3 is an annular member of suitably resilient material resistant to high temperatures, such as ethylene-propylene-terpolymer elastomer material or the equivalent.
  • the gasket has an upper U-shaped portion 7a which slips snugly over reflector flange 2a around its circumference, and has intergral therewith a tubular portion 7b which is compressed by bead 3b of refractor 3 in the closed assembly, as seen in FIGURE 2.
  • the refractor engaging surface of gasket portion 7b is formed with a series of spaced integral ribs (not shown) extending continuously around its length to provide optimum sealing engagement with refractor 3.
  • Reflector 2 is formed with an opening at its rear which is closed by a cup-shaped housing 10 in which a lampholder or socket 11 is adjustably secured for holding lamp 12, such as a mercury vapor, sodium vapor, or other type of lamp.
  • lamp 12 such as a mercury vapor, sodium vapor, or other type of lamp.
  • Housing 10 has a flange portion 10a at its front end (see FIGURE and is secured to reflector 2 around its rear opening by means of rivets 13 spaced around the flange portion.
  • flange portion a facing the reflector wall is formed with an annular recess (see FIGURE 4) surrounding the rim of housing 10, in which resilient gasket 14 is received and compressed between flange 10a and the rear wall of reflector 2.
  • the outermost edge of flange portion 10a is in contact with the rear surface of reflector 2, and the depth of the annular recess in flange portion 10a is so dimensioned with respect to the thickness of gasket 14 that the gasket is under limited uniform compression in the riveted assembly of housing 10 to reflector 2, and provides a tight permanent seal at the joint therebetween.
  • a permeable air purifying filter is arranged in the otherwise air-tight optical system of the luminaire to permit passage of air into and out of the optical system and to remove dust, dirt, and other contaminants of gaseous or particulate nature which may be contained in the air and which would adversely affect the illuminating level of the optical system, such as by forming dulling films, depositing materials corrosive to or discoloring the reflecting surface of reflector 2, or otherwise interfering with the function of the refractor, reflector and lamp.
  • the air purifying means is constituted by a filter cartridge 15 (see FIGURE 6) comprising a bonded cylindrical mass 16 of activated charcoal particles contained within a tubular holder 17 of resilient materials such as that of the gaskets previously described, and plugging rear opening 10b in housing 10.
  • Holder 17 is open at opposite ends and is formed at one end on its outer surface with concentric annular lips 17a, 17b defining an annular groove therebetween in which the edges of housing 10 defining rear opening 10b are snugly received and grasped by lips 17a, 17b in sealing relation.
  • Filter cartridge 15 may thereby be readily attached and removed from the rear opening in socket housing 10.
  • Insulated lead wires 18, 19 (see FIGURES 4 and 5) connected to the terminals of socket 11 pass through a small aperture in housing 10 which is plugged by a resilient plug or bushing 20 having a pair of holes through which lead wires 18, 19 extend.
  • Bushing 20 tightly fits within and is radially compressed by the edges of aperture of 100 and thereby in turn tightly compresses lead wires 18, 19, thus providing an air-tight bushing.
  • filter 16 acts to remove any organic and inorganic contaminants in the air, both of gaseous and particulate type. Particles have above about .1 micron in size will be screened by the activated charcoal out of the air as it passes through the filter.
  • filter mass 16 should preferably be such that its diameter is large enough to aflord low resistance to the volume of air passing through the filter, while its thickness is large enough to provide adequate mechanical strength for handling without risk of breakage. In a typical case, the diameter would be about 1% and the thickness about In a commercially available activated charcoal filter product satisfactory for the purposes of the invention, the charcoal particles have a size within U.S. sieve sizes 20 to 50 and are bonded by a thermally resistant binder material.
  • filters composed of bonded activated charcoal particles are particularly suitable for the purposes of the invention, other types of filter materials which purify air by a combination of screening out solid particles and removal of gaseous contaminants by absorption may alternatively be employed, as for example, activated alumina,
  • activated charcoal is preferred because it specifically adsorbs hydrocarbon vapors in preference to water.
  • FIGURE 7 shows a different type of luminaire in which the present invention may be embodied.
  • This luminaire is adapted for indoor use, as for example, in factory areas where the atmosphere may adversely affect the optical and illuminating system of the luminaire.
  • the luminaire comprises a bell-shaped reflector 30 which has an interior specular reflecting surface and is secured to an intermediate support housing 31, which in turn is supported from ballast housing 32 and separated therefrom for thermal insulating purposes by spacers 51.
  • Lamp 33 such as a mercury vapor or other gas discharge lamp, is removably held in socket 34 secured to the top of housing 31, and extend down into the interior of reflector 30'.
  • Ballast housing 32 which contains electrical ballast components (not shown) for operating discharge lamp 33, is releasably secured to upper support member 40 by means of hinge 41 and latch 42, support member 40 being normally secured to a pipe conduit for supporting the luminaire unit therefrom and having an opening in the top for passage of electrical conductors therethrough (not shown).
  • Housing 31 is formed with a series of circumferentially spaced openings 31a which are closed by an annular transparent window 35 such as glass which is mounted within housing 31 just inside openings 31a and encircling the upper portion of lamp 33. Light from lamp 33 is thus transmitted upwardly out of the luminaire through window openings 31a (so-called up light), as well as downwardly through the bottom opening of reflector 30.
  • the bottom opening is closed by a glass pane 36 having a peripheral molding strip 37 which is hingedly connected to the reflector 30 by hinge 38.
  • latch 39 which serves to releasably secure window pane 36 to reflector 30 in closed position comprises plate members 39a, 39b secured respectively to window pane 36 and reflector 30, and screw 39c which interconnects members 39a, 3% by threaded engagement with member 39a.
  • this luminaire is provided with a sealed optical system in which air from the atmosphere is permitted to pass only through a purifying filter.
  • gasket 43 which is of tubular, air core type.
  • the seal between the bottom edge of glass window 35 and the surface of reflector 30 on which it rests is provided by an annular flat gasket 44.
  • the upper end of support housing 31 adjacent the bottom of ballast housing 32 is sealed by means of a resilient plug or bushing 45 having two aperture for passage of insulated lead wires 46, 47 connected to socket 34, in which apertures the latter wires are tightly gripped by the radial compression on plug 45 due to its tight fit in the aperture at the top of housing 31.
  • Gasket 48 (see FIGURE 9) which comprises, in cross section, a U-shaped portion 48a interposed between edge molding 37 and glass pane 36, and a tubular portion 48b interposed between the upper surface of edge molding 37 and the bottom surface of reflector flange 30a.
  • tubular gasket portion 48b is compressed as shown in FIGURE 9 to provide an airtight seal around the bottom opening of reflector 30.
  • gaskets 43, 44, 48 and plug 45 are preferably made of a resilient thermally-resistant material such as the ethylene-propylene-terpolymer elastomer material mentioned previously, or equivalent materials.
  • Filter cartridge 15 identical to filter device 15 shown in FIGURES 4-6 is inserted in an aperture in reflector 30 and is securely but removably held therein in the same manner as filter device 15 is mounted in housing of the FIGURE 1 luminaire.
  • the interior of the optical system of the FIGURE 7 luminaire is thus sealed except for the passage provided through filter which serves to purify air entering the optical system substantially as described in connection with the FIG- URE 1 luminaire.
  • filter 15 may be inserted in the optical system of luminaires at locations other than as shown and described herein, as dictated by the particular structure and needs of the luminaire unit in which it is used.
  • the invention a luminaire which breathes only purified air, from which both solid and gaseous contaminating materials have been removed.
  • the deleterious effects of corrosive impurities and dulling films on the luminaire optical system are reduced to a remarkable degree, and the initially high level of illumination produced by the luminaire is maintained over a long period of time, even in heavily contaminated atmospheres in industrial, smog and similar environments.
  • the filter-sealed arrangement of the invention is readily and economically manufactured, is applicable to a wide variety of luminaire and other lighting devices, and makes use of filter devices which are easily removable and replaceable, and can be used interchangeably in different optical systems.
  • a luminaire a housing, a reflector and light transmitting closure means secured together in sealed relation forming a closed optical enclosure, means for mounting a lamp in said enclosure, and air-permeable, gas-adsorbent filter means arranged on said closed optical enclosure communicating with the interior thereof for filtering the air passing thereinto by removal of solid and gaseous impurities contained in the air, said filter means constituting the sole passageway for heated air expelled outwardly from said enclosure and for air drawn into the enclosure when the latter is cooled, said housing closing an opening in said reflector and said filter means communicating with the interior of said enclosure through an aperture in said housing.
  • a luminaire a housing, a reflector and light transmitting closure means secured together in sealed relation forming a closed optical enclosure, means for mounting a lamp in said enclosure, and air-permeable, gas adsorbent filter means arranged on said closed optical enclosure communicating with the interior thereof for filtering the air passing thereinto by removal of solid and gaseous impurities contained in the air, said filter means constituting the sole passageway for heated air expelled outwardly from said enclosure and for air drawn into the enclosure when the latter is cooled, said filter means communicating with the interior of said enclosure through an aperture in said reflector.
  • said reflector having a bottom opening and an upper opening
  • said housing having an annular portion surrounding said upper refiector opening and having window openings therein
  • said light transmitting closure means comprising a first transparent closure closing said bottom reflector opening and a second transparent closure closing said housing window openings for transmitting light upwardly from said lamp means to the exterior of the luminaire.
  • a reflector and a transparent closure therefor separably secured together and forming a closed optical system sealing means between said reflector and said transparent closure forming an air-tight seal for said closed optitcal system, and air-permeable purifying filter means inserted into said closed optical system for filtering the air passing therethrough .
  • lamp means arranged in said closed optical system, said lamp means during operation heating the air in said closed optical system to elevated temperature, whereby heated air is expelled outwardly through said filter means during operation of said lamp means, and cool air is drawn inwardly through said filter means and purified thereby when said lamp means is not operating
  • said reflector being concave and having an annular rim
  • said transparent closure being bowl-shaped and having a peripheral edge portion in mating relation with said reflector rim
  • said sealing means comprising a resilient thermally-resistant gasket secured to one of said reflector and said transparent closure and interposed in sealing relation therebetween, said reflcetor having an
  • a reflector and a transparent closure therefor separably secured together and forming a closed optical system sealing means between said reflector and said transparent closure forming an air-tight seal for said closed optical system, and air-permeable purifying filter means inserted into said closed optical system for filtering the air passing therethrough by removal of solid and gaseous impurities contained therein, lamp means arranged in said closed optical system, said lamp means during operation heating the air in said closed optical system to elevated temperature, whereby heated air is expelled outwardly through said filter means during operation of said lamp means, and cool air is drawn inwardly through said filter means and purified thereby when said lamp means is not operating, said filter means communicating with the interior of said optical system through an aperture in said reflector, said reflector having a bottom opening closed by said transparent closure and having an upper opening, window housing means enclosing said upper opening and being transparent in at least a portion thereof for transmitting light upwardly from said lamp means to the exterior of the luminaire, and lampholder means secured to said window housing
  • said window housing means comprising an annular member secured to the top of said reflector extending around said upper open ing thereof and having window openings spaced therearound, an annular transparent window arranged concentrically within said annular member closing the window opening thereof, and resilient gasket means sealing said reflector, said annular housing member and said annular transparent window to each other in air-tight relation.
  • annular housing member having a top wall, an upper housing overlying and secured to said top wall and adapted to contain electrical components for operating said lamp means, said top wall having an aperture leading to the interior of the adjacent upper housing, resilient plug means closing said aperture, and elongated conductor means connected to said lampholder means and passing into said upper housing through said resilient plug means in airtight sealing relation therewith.
  • said sealing means between said reflector and said transparent closure comprising an annular gasket of thermally-resistant resilient material, said transparent closure being hingedly connected at one side to said reflector and having latch means on its opposite side attachable to said reflector for releasably holding said transparent closure in closed, airtight sealing relation with said reflector.
  • a reflector and a transparent closure therefor separably secured together and forming a closed optical system sealing means between said reflector and said transparent closure forming an airtight seal for said closed optical system, and air-permeable purifying filter means inserted into said closed optical system for filtering the air passing therethrough by removal of solid and gaseous impurities contained therein, said reflector having a wall portion associated therewith forming a part of the enclosure for the optical system, said wall portion defining an aperture
  • said filter means comprising air-filtering material held in a tubular holder, said tubular holder being formed on its outer surface with juxtaposed resilient lip portions extending around said holder and defining an annular groove therebetween, said holder fitting within said aperture with its annular groove receiving the edges defining said aperture, so that said resilient lip portions respectively engage opposite sides of said wall portion for tightly but removably mounting said filter holder in said wall portion.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
US530214A 1966-02-25 1966-02-25 Luminaire Expired - Lifetime US3457399A (en)

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US53021466A 1966-02-25 1966-02-25

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US (1) US3457399A (US06633600-20031014-M00021.png)
BE (1) BE694608A (US06633600-20031014-M00021.png)
BR (1) BR6787162D0 (US06633600-20031014-M00021.png)
CH (1) CH474017A (US06633600-20031014-M00021.png)
ES (1) ES337164A1 (US06633600-20031014-M00021.png)
FR (1) FR1512244A (US06633600-20031014-M00021.png)
GB (1) GB1121246A (US06633600-20031014-M00021.png)
NL (1) NL6702669A (US06633600-20031014-M00021.png)

Cited By (15)

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US3695009A (en) * 1970-03-30 1972-10-03 Mitchell M Osteen Air filter device
US3878505A (en) * 1973-05-21 1975-04-15 Hubbell Inc Harvey Independently removable reflector and filter
US4015114A (en) * 1974-12-20 1977-03-29 A. Ahlstrom Osakeyhtio Lighting fitting
US4028541A (en) * 1974-11-11 1977-06-07 General Electric Company Luminaire
US4148849A (en) * 1976-03-29 1979-04-10 Paul Steiner Air purifying and moistening apparatus
US4405974A (en) * 1981-02-06 1983-09-20 Harvey Hubbell Incorporated Filter assembly for luminaire
DE4444832A1 (de) * 1994-12-15 1996-06-20 Bayerische Motoren Werke Ag Leuchteneinheit für Kraftfahrzeuge
US20040163533A1 (en) * 2003-02-21 2004-08-26 Shinji Tagami Swash plate-type compressor
WO2006078058A2 (en) * 2005-01-21 2006-07-27 Matsushita Electric Industrial Co., Ltd. Light-source unit, light-source apparatus, and projection-type display apparatus
US20080239731A1 (en) * 2007-04-02 2008-10-02 Ruud Lighting, Inc. Remote Ballast Housing with Airflow Channel
EP1650496A3 (de) * 2004-10-21 2010-01-06 Zumtobel Staff GmbH Leuchtengehäuse mit Druckausgleichsvorrichtung
US20100033688A1 (en) * 2005-01-21 2010-02-11 Ryozo Obama Light-source unit, light-source apparatus, and projection-type display apparatus
WO2010116128A1 (en) * 2009-04-07 2010-10-14 Primalux Limited Lighting system
US9506628B1 (en) * 2011-05-28 2016-11-29 Deepsea Power & Lighting, Inc. Semiconductor lighting devices and methods
DE102004064184B4 (de) 2003-03-26 2018-12-06 Mann+Hummel Gmbh Filteranordnung und ein Verfahren zu deren Herstellung

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Publication number Priority date Publication date Assignee Title
FR2689612B1 (fr) * 1992-04-06 1999-02-26 3E International Structure utilisable sur mat ou lampadaire d'eclairage et permettant d'obtenir des effets esthetiques originaux.
FR2840055B1 (fr) * 2002-05-22 2004-07-30 App Et Bobinage Electr Du Limo Bloc optique notamment destine a faire partie d'un luminaire, en particulier pour l'eclairage public ou industriel
FR2874680B1 (fr) * 2004-08-24 2006-11-24 Ceit Entpr S Soc Par Actions S Dispositif d'eclairage de panneau d'affichage, notamment pour reseau ferre

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GB575976A (en) * 1944-04-24 1946-03-13 Gen Electric Co Ltd Improvements in or relating to dust-proof electric lighting fittings
US3089025A (en) * 1960-08-08 1963-05-07 Harold A Brisco Lamp fixtures
US3315072A (en) * 1965-08-16 1967-04-18 Mc Graw Edison Co Luminaire
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US1900330A (en) * 1931-08-21 1933-03-07 Line Material Co Lighting fixture
GB575976A (en) * 1944-04-24 1946-03-13 Gen Electric Co Ltd Improvements in or relating to dust-proof electric lighting fittings
US3089025A (en) * 1960-08-08 1963-05-07 Harold A Brisco Lamp fixtures
US3315072A (en) * 1965-08-16 1967-04-18 Mc Graw Edison Co Luminaire
US3350860A (en) * 1965-12-15 1967-11-07 Donaldson Co Inc Gas filter
US3376695A (en) * 1966-01-06 1968-04-09 Crawford Ind Ltd Exhaust filters

Cited By (18)

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Also Published As

Publication number Publication date
ES337164A1 (es) 1968-01-16
GB1121246A (en) 1968-07-24
NL6702669A (US06633600-20031014-M00021.png) 1967-08-28
BE694608A (US06633600-20031014-M00021.png) 1967-07-17
BR6787162D0 (pt) 1973-08-09
FR1512244A (fr) 1968-02-02
CH474017A (de) 1969-06-15

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