US3725697A - Luminaire comprising means for reducing temperature of exterior refractor - Google Patents
Luminaire comprising means for reducing temperature of exterior refractor Download PDFInfo
- Publication number
- US3725697A US3725697A US00871513A US3725697DA US3725697A US 3725697 A US3725697 A US 3725697A US 00871513 A US00871513 A US 00871513A US 3725697D A US3725697D A US 3725697DA US 3725697 A US3725697 A US 3725697A
- Authority
- US
- United States
- Prior art keywords
- light
- housing
- source
- diffusing
- opening
- 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
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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
- F21V5/00—Refractors for light sources
- F21V5/008—Combination of two or more successive refractors along an optical axis
-
- 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
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
Definitions
- a luminaire for indoor area lighting is provided with an intermediate member for at least diffusing and opi 240/78 tionally distributing light emitted from a high intensity [581 Field H 51 H light source onto a prismatic lens, with means for dif- 240/92 106 5 41 4 fusing light reflected by the luminaire housing, with 1 the refractor and the intermediate member having such a relationship to each other that the efficiency of [56] References Cited the luminaire will be increased and the temperature of the exterior refractor is minimized permitting fabrica- UNITED STATES PATENTS tion thereof from plastic.
- This invention relates to luminaires and more particularly to the recessed or suspended ceiling or surface mounted type which utilize relatively small and concentrated light sources and which are used for indoor lighting purposes.
- Mercury lamps are presently being manufactured with such desirable characteristics that a demand for luminaires utilizing these lamps has arisen in the stores, banks and other interior lighting areas.
- luminaires using mercury lamps are compared to luminaires with other light sources, it is found that the former is relatively expensive, such a lamp requires ballast equipment in order to function. Therefore, to bring about an economical utilization of these lamps, to make such luminaires competitive with standard lighting units, the light distribution pattern from a particular luminaire utilizing a concentrated light source such as a mercury lamp must be significantly larger than the light distribution arising from present luminaires which utilize low intensity or non-concentrated light sources in order that the higher cost of these high intensity light source luminaires will be offset by there being required fewer of them to provide the desired light distribution.
- the fluorescent sources utilized in these luminaires are elongated and since a plurality of these sources are usually utilized in close spatial relationship in a given luminaire, these sources have a large effective area and therefore light emitted from these sources will strike any particular point of the refractor panel throughout a wide angular range, and this results in there being no further need to diffuse this emitted light.
- the refractor lenses suitable for fluorescent light sources do not take into account the emission of a high degree of heat, which is typical of high intensity light sources, resulting in unwanted heat, disrupting normal heat flow patterns whether they arise from air heating or cooling.
- luminaires with high intensity light sources for lighting the interior areas and more particularly large interior areas such as stores, banks and the like.
- a further object of the present invention is to provide a mercury lamp luminaire wherein build up in heat intensity at the exposed refractor surface is minimized, so that it can be made of plastic or other economical substances.
- Another object is to increase efficiency in such luminaires.
- the present invention achieves the above objectives by painting the luminaire housing with a high reflectance paint and by placing a light diffusing element which may optionally direct light incident thereon between the mercury or other high intensity light source and a cut-off prism panel.
- the intermediate member is positioned to prevent light emitted from the source from being directly incident on the cutoff prism panel thereby providing the additional necessary diffusion for all the light emitted and this member may be optionally specially designed to distribute light onto the cut-off refractor in the proportions desired to obtain the desired optical effect.
- the intermediate member is made of glass
- the infrared energy emitted as light rays from the mercury or other high intensity source are redistributed by the member. This, therefore, reduces the prism panel temperature and thereby, makes the temperature comfortable and allows utilization of plastic in the making of the prism panel.
- FIG. I is an elevational sectional view of a prior art fluorescent luminaire in which is utilized a high intensity light source
- FIG. 2 is a view of the prior art fluorescent luminaire along axis II II of FIG. 1;
- FIG. 3 is an elevational, cross-sectional view of a preferred embodiment of a luminaire according to the present invention.
- FIG. 4 is an elevational, cross-sectional view of the intermediate member of the luminaire having the preferred embodiment shown in FIG. 3;
- FIG. 5 AB is a divided bottom plan view and top plan view of the intermediate member of FIG. 4 as viewed in the direction of arrows V
- FIG. 6 is a cross-sectional, partial view of the intermediate member taken along VI VI of FIG. 4, showing typical rays indicating the lateral diffusion provided by the member;
- FIG. 7 is a cross-sectional view of an intermediate member made in accordance with the teachings of the present invention having a second preferred embodiment
- FIG. 8 is a cross-sectional view of an intermediate member having a third preferred embodiment.
- FIG. 9 is a cross-sectional view of an intermediate member having a fourth preferred embodiment.
- FIG. 1 illustrates a refractor panel or lens 12 utilized in prior art fluorescent lamp luminaires. These refractor panels 12 carry cone shaped cut-off prisms 13 for internally reflecting light which would otherwise be emitted at high angles.
- the light source diagrammatically illustrated in FIG. 1 as L.S. is a high intensity light source and in particular, represents a mercury lamp source.
- fluorescent light sources though having a relatively high intensity, have a large effective area and are not therefore very concentrated.
- These prisms 13 which act so well to cut off high angled light by internally reflecting the same do little to diffuse incident light.
- the rays a, b are not diffused by the lens 12 but are emitted as a, b, and as a result the observer, beneath the luminaire, views the light source L5. as a substantially circular image A which has a high brightness level with the remaining refractor areas being dark.
- the brightness contrast is not substantially reduced by the light diffusion which results from the utilization of a luminaire housing which has high reflectance paint thereon. This contrast therefore makes use of this type of luminaire in combination with a high intensity light source undesirable for indoor lighting purposes.
- the configuration of light distributed can be varied with the utilization of pyramid shaped prisms but since the prism angle cannot be varied substantially due to the fact that the lens 12 is primarily utilized as a means for preventing high angle glare no diffusion can be obtained in addition to that arising from theluminaire housing covered with high reflectance paint.
- FIG. 3 illustrates a preferred embodiment of the present invention.
- the luminaire is comprised of five primary components.
- a high intensity light source M.L.S. (diagrammatically shown) as for instance a mercury lamp, a housing 10 painted with high reflectance white paint on the inner surface and which is utilized in the place of a reflector to achieve higher light diffusion properties, a heat baffle 17 placed at the top of the housing 10, lens 12 including cone shaped cut-off prisms 13', on the light emitting surface thereof enclosing the housing 10, and a light diffusing and directing member 14 positioned between the high intensity light source M.L.S. and the lens 12'.
- the light directing member 14 is positioned a substantial distance (approximately one-third the width of the lens) above the lens 12'. This placement results in a substantial amount of the light which is reflected and diffused by the housing 10 only passing through lens 12'.
- the luminaire housing 10 is coated on its internal surface with a high reflectance paint (not shown).
- a high reflectance paint (not shown).
- light incident thereon f, g is diffused into infinite components diagrammatically shown as (f,f',f" and g, g", g') which are shown in this figure optically so that the longer the ray the more light will be diffused into that ray direction.
- the light directing and diffusing member 14' shown in FIGS. 3, 4 and 5 is comprised of a light incident surface and a light emergent surface. There is a series of radial flutes 15 on the light incident surface. As can be seen in FIG. 6 light rays c, d, incident upon these flutes 15 are diffused laterally c', d.
- the light emergent'surface has a series of concentric prisms provided with curved or fluted emergent surfaces which provide further diffusion of rays such as e and which provide concentration of light from the source, such as at e and e" to thereby direct such light onto the lens 12' as shown by the typical ray e striking the left area of the lens in FIG. 3.
- the luminaire of the invention should be designed specifically for a particular light source shape. While we think of the mercury lamp source as having a concentrated point source, in truth, the source has a finite size and shape depending upon the type of lamp. Generally, the source is longer in varying degree along the lamp axis. Some lamps have a phosphorescent coating on the bulb which modifies the color of the light generated by the arc and effectively increases the size of the source. Therefore, a different light directing member 14 could be made having the optimum design of prisms and flutes for each of these lamp variations. But the preferred embodiment illustrated in FIGS. 4 and 5 is a compromise design that works satisfactorily with all lamps presently available.
- the invention has been illustrated with reference to a preferred embodiment utilizing a prismatic diffuser 14 positioned intermediate the lens 12' and the light source M.L.S. which provides a controlled diffusion since prisms 16 are utilized to redirect the light incident thereon in a predetermined way on lens 12.
- This combination of an intermediate diffusing and light directing member provides the best brightness contrast and light distribution control.
- the intermediate member 14 need only act as a diffusing element without controlling the distribution of light incident thereon.
- Such an intermediate member 14' could be made of a plain diffusing material such as opal glass, etched or sand blasted glass, or glass with some diffusing material applied to the surface of the glass (FIG. 7). If it were desired to achieve a brightness contrast which would be better than that provided by this simple diffusing intermediate member 14', the intermediate member 14 made of the plain diffusing material could be designed so that the density of the diffusing material would be higher in the center of the intermediate member than it would be at the edges thereof (FIG. 8).
- intermediate member 14" so that the center of the diffuser is farther away from the light source a better brightness contrast could be obtained. This could be done by making the depth of the intermediate member greater without changing the diameter 14" (FIG. 9). A conically or spherically shaped intermediate member would be advantageous in achieving these results.
- a luminaire comprising a housing, a high intensity light source mounted within said housing, first refractor means for closing the bottom opening of said housing, means for reducing the temperature at said refractor means mounted between said light source and said first refractor and comprising means for intercepting direct light from said light source that would otherwise strike said first refractor, said temperature reducing means including means for diffusing said intercepted light, said first refractor including cut-off means for internally reflecting light which would otherwise be emitted at relatively high angles, the interior surface of said housing comprising means for diffusing light from said light source and for directing a portion thereof to said bottom opening, said temperature reducing and light diffusing means being spaced from said first refractor so that a substantial portion of the light from said light source which is diffused by said housing and directed therefrom to pass out of said bottom opening will not be intercepted by said temperature reducing and light and wherein said temperature reducing and light diffusion means further comprises means for redistributing a portion of the infrared heat energy of said intercepted
- a luminaire comprising a high intensity light source, a first light controlling member spaced from said light source, a second light controlling means positioned intermediate the source and first light controlling member for reducing the temperature at said first light controlling member and comprising means for intercepting substantially all direct light from the source which would otherwise be incident on said first member and for diffusing such light upon the incident surface of said first member, a housing completely enclosing the source and said light controlling means and having a substantially wholly diffusely reflective internal surface, the internal surface of said housing constituting means for receiving direct light from the light source and diffusely reflecting the same to said first member, said housing having an opening, said first member extending across and filling that opening and comprising means for receiving diffused light from said light controlling means and for receiving diffused light from said housing internal surface and for redirecting the same onto relatively large areas said light controlling means being fabricated of glass and being spaced from said light source and said first member and the periphery of said light controlling means being spaced from said housing so as further to constitute means for redistributing heat energy of the light incident there
- a luminaire comprising a high intensity light source, a housing surrounding said source and having an opening, an interior surface of the housing being diffusely reflective whereby that portion of the light from the source incident upon the interior surface is diffusely reflected to said opening, a light diffusing means positioned between said source and opening and spaced from said source and opening and from said housing for reducing the temperature at said light controlling member, said diffusing means being located to intercept substantially all direct light between said source and opening and a light controlling member positioned in said opening to intercept substantially all light passing therethrough and to receive diffused light from said housing and said light diffusing means, said light controlling member having means for internally reflecting light which would otherwise be emitted at relatively high angles through said opening, said diffusing means being heat resistant and of material to absorb and redistribute heat from the light source which otherwise would be directed upon localized areas of said light controlling member, and said light controlling member being of a thermo plastic material and being so located relatively to the light source that it would be adversely effected by the heat from said light source but for the interposition of said diffusing
- a luminaire as claimed in claim 4 wherein said housing is shaped to intercept substantially all light from the source that does not pass directly from the source to said light controlling means.
- a luminaire as claimed in claim 4 wherein said diffusing means comprises flutes extending radially from the center thereof.
- a luminaire comprising a housing substantially all of the internal surface of which is diffusely reflecting, a high intensity light source mounted within said housing and being enclosed thereby, a bottom opening in said housing, a prismatic light distributing means for closing the bottom opening of the housing, prismatic light diffusing means for reducing the temperature at the light distributing means located between the light source and the light distributing means and comprising a generally circular element having on that surface thereof closest to the light source a plurality of radially disposed flutes and on its opposite side a plurality of annular prisms whereby direct light incident upon said fluted surface is emitted from said other surface in a diffused fashion and infrared heat energy is redistributed, said light diffusing means having its periphery spaced from the internal surface of the housing and being of such size and so located that the light distributing means is substantially evenly and only illuminated by diffused light from said diffusing means and by diffused light reflected from said housing, said prismatic light distributing means having prisms formed therein for directing the diffused light
- a luminaire comprising a high intensity light source, a housing surrounding said source and having an opening, all of the interior of the housing being diffusely reflective whereby that portion of the light from the source incident upon the interior surface of the housing is diffusely reflected to said opening, a light diffusing element positioned between said source and said opening and spaced from said source and opening and from said housing, said element being located to intercept substantially all direct light between said source and opening, and a light controlling member positioned in said opening to intercept substantially all light passing therethrough and to receive diffused light only from said housing and said light diffusing element, said light controlling member having means for internally reflecting light which would otherwise be emitted at relatively high angles from said opening, said diffusing element being heat resistant and of a material to absorb and redistribute a substantial portion of the heat from the light source which otherwise would be directed upon localized areas of said light controlling member and said light controlling member being of a thermo plastic material and so located relatively to the light source that it would be adversely effected by the heat from said light source but for the interposition of said light
Abstract
Description
Claims (9)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87151369A | 1969-10-03 | 1969-10-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3725697A true US3725697A (en) | 1973-04-03 |
Family
ID=25357621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00871513A Expired - Lifetime US3725697A (en) | 1969-10-03 | 1969-10-03 | Luminaire comprising means for reducing temperature of exterior refractor |
Country Status (4)
Country | Link |
---|---|
US (1) | US3725697A (en) |
DE (2) | DE2032229A1 (en) |
FR (1) | FR2056445A5 (en) |
NL (1) | NL7009622A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4059755A (en) * | 1975-12-29 | 1977-11-22 | Armstrong Cork Company | Luminaire lens insert |
US4164012A (en) * | 1977-06-17 | 1979-08-07 | Koehler Manufacturing Company | Luminaire apparatus for reflecting radiant energy and methods of controlling characteristics of reflected radiant energy |
US4510560A (en) * | 1981-04-20 | 1985-04-09 | Masataka Negishi | Device for controlling light images |
US5149191A (en) * | 1991-12-23 | 1992-09-22 | Ian Lewin | Combination louver/lens light fixture shield |
WO2002044612A2 (en) * | 2000-11-29 | 2002-06-06 | Zumtobel Staff Gmbh | Light with a transparent panel |
US20060050200A1 (en) * | 2004-08-26 | 2006-03-09 | Fuji Photo Film Co., Ltd. | Prism sheet and display device using the same |
US20070046874A1 (en) * | 2005-08-12 | 2007-03-01 | Masaya Adachi | Display device and electrical appliance using the same |
US20090080197A1 (en) * | 2006-03-21 | 2009-03-26 | Koninklijke Philips Electronics N.V. | Light emitting diode module and method for the manufacturing of such an led module |
CN104412040A (en) * | 2012-07-17 | 2015-03-11 | 宗拓贝尔照明器材有限公司 | Light-emitting assembly and lamp having a light-emitting assembly |
US20170175985A1 (en) * | 2014-10-08 | 2017-06-22 | Milyon, LLC | Suspendable light fixture |
US9765949B2 (en) | 2013-07-26 | 2017-09-19 | Bright View Technologies Corporation | Shaped microstructure-based optical diffusers for creating batwing and other lighting patterns |
US10072816B2 (en) | 2013-06-19 | 2018-09-11 | Bright View Technologies Corporation | Microstructure-based optical diffusers for creating batwing and other lighting patterns |
US10302275B2 (en) | 2013-06-19 | 2019-05-28 | Bright View Technologies Corporation | Microstructure-based diffusers for creating batwing lighting patterns |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1050466A (en) * | 1909-06-15 | 1913-01-14 | Bassett Jones Jr | Reflector. |
US1870241A (en) * | 1931-08-14 | 1932-08-09 | Holophane Co Inc | Luminair |
US1909947A (en) * | 1929-02-06 | 1933-05-23 | Ernest H Greppin | Operating room lighting fixture |
US2173325A (en) * | 1936-02-24 | 1939-09-19 | American Sterilizer Co | Surgical operating luminaire |
US2232276A (en) * | 1937-03-22 | 1941-02-18 | Safety Car Heating & Lighting | Illuminator |
US2232543A (en) * | 1938-03-03 | 1941-02-18 | Holophane Co Inc | Store lighting apparatus |
US2244737A (en) * | 1937-12-31 | 1941-06-10 | Adlake Co | Lighting fixture |
US3064125A (en) * | 1957-09-30 | 1962-11-13 | Corning Glass Works | Luminair |
US3255342A (en) * | 1962-05-04 | 1966-06-07 | Quarzlampen Gmbh | Lighting arrangement |
-
1969
- 1969-10-03 US US00871513A patent/US3725697A/en not_active Expired - Lifetime
-
1970
- 1970-06-30 NL NL7009622A patent/NL7009622A/xx unknown
- 1970-06-30 DE DE19702032229 patent/DE2032229A1/en active Pending
- 1970-06-30 DE DE19707024475U patent/DE7024475U/en not_active Expired
- 1970-06-30 FR FR7024256A patent/FR2056445A5/fr not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1050466A (en) * | 1909-06-15 | 1913-01-14 | Bassett Jones Jr | Reflector. |
US1909947A (en) * | 1929-02-06 | 1933-05-23 | Ernest H Greppin | Operating room lighting fixture |
US1870241A (en) * | 1931-08-14 | 1932-08-09 | Holophane Co Inc | Luminair |
US2173325A (en) * | 1936-02-24 | 1939-09-19 | American Sterilizer Co | Surgical operating luminaire |
US2232276A (en) * | 1937-03-22 | 1941-02-18 | Safety Car Heating & Lighting | Illuminator |
US2244737A (en) * | 1937-12-31 | 1941-06-10 | Adlake Co | Lighting fixture |
US2232543A (en) * | 1938-03-03 | 1941-02-18 | Holophane Co Inc | Store lighting apparatus |
US3064125A (en) * | 1957-09-30 | 1962-11-13 | Corning Glass Works | Luminair |
US3255342A (en) * | 1962-05-04 | 1966-06-07 | Quarzlampen Gmbh | Lighting arrangement |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4059755A (en) * | 1975-12-29 | 1977-11-22 | Armstrong Cork Company | Luminaire lens insert |
US4164012A (en) * | 1977-06-17 | 1979-08-07 | Koehler Manufacturing Company | Luminaire apparatus for reflecting radiant energy and methods of controlling characteristics of reflected radiant energy |
US4510560A (en) * | 1981-04-20 | 1985-04-09 | Masataka Negishi | Device for controlling light images |
US5149191A (en) * | 1991-12-23 | 1992-09-22 | Ian Lewin | Combination louver/lens light fixture shield |
US7093955B2 (en) | 2000-11-29 | 2006-08-22 | Zumtobel Staff Gmbh | Light with a transparent panel |
WO2002044612A2 (en) * | 2000-11-29 | 2002-06-06 | Zumtobel Staff Gmbh | Light with a transparent panel |
WO2002044612A3 (en) * | 2000-11-29 | 2002-10-24 | Zumtobel Staff Gmbh | Light with a transparent panel |
US20040012981A1 (en) * | 2000-11-29 | 2004-01-22 | Zumtobel Staff Gmbh | Light with a transparent panel |
US7452093B2 (en) * | 2004-08-26 | 2008-11-18 | Fujifilm Corporation | Prism sheet and display device using the same |
US20060050200A1 (en) * | 2004-08-26 | 2006-03-09 | Fuji Photo Film Co., Ltd. | Prism sheet and display device using the same |
US20070046874A1 (en) * | 2005-08-12 | 2007-03-01 | Masaya Adachi | Display device and electrical appliance using the same |
US7742137B2 (en) * | 2005-08-12 | 2010-06-22 | Hitachi, Ltd. | Display device and electrical appliance using the same |
US20090080197A1 (en) * | 2006-03-21 | 2009-03-26 | Koninklijke Philips Electronics N.V. | Light emitting diode module and method for the manufacturing of such an led module |
CN104412040A (en) * | 2012-07-17 | 2015-03-11 | 宗拓贝尔照明器材有限公司 | Light-emitting assembly and lamp having a light-emitting assembly |
US9810415B2 (en) | 2012-07-17 | 2017-11-07 | Zumtobel Lighting Gmbh | Light-emitting assembly and lamp having a light-emitting assembly |
CN104412040B (en) * | 2012-07-17 | 2018-06-22 | 宗拓贝尔照明器材有限公司 | Luminescence component and the lamp with luminescence component |
US10072816B2 (en) | 2013-06-19 | 2018-09-11 | Bright View Technologies Corporation | Microstructure-based optical diffusers for creating batwing and other lighting patterns |
US10302275B2 (en) | 2013-06-19 | 2019-05-28 | Bright View Technologies Corporation | Microstructure-based diffusers for creating batwing lighting patterns |
US9765949B2 (en) | 2013-07-26 | 2017-09-19 | Bright View Technologies Corporation | Shaped microstructure-based optical diffusers for creating batwing and other lighting patterns |
US20170175985A1 (en) * | 2014-10-08 | 2017-06-22 | Milyon, LLC | Suspendable light fixture |
US9903572B2 (en) * | 2014-10-08 | 2018-02-27 | Milyon, LLC | Suspendable light fixture |
Also Published As
Publication number | Publication date |
---|---|
FR2056445A5 (en) | 1971-05-14 |
NL7009622A (en) | 1971-04-06 |
DE7024475U (en) | 1972-09-07 |
DE2032229A1 (en) | 1971-04-15 |
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Owner name: HOLAPHANE COMPANY, INC., A CORP. OF DE. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MANVILLE SALES CORPORATION, A CORP. OF DE;REEL/FRAME:005125/0574 Effective date: 19890630 |
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Owner name: HOLOPHANE CORPORATION, OHIO Free format text: MERGER;ASSIGNOR:HOLOPHANE LIGHTING, INC.;REEL/FRAME:007467/0476 Effective date: 19941209 Owner name: HOLOPHANE LIGHTING, INC., OHIO Free format text: CHANGE OF NAME;ASSIGNOR:HOLOPHANE COMPANY, INC.;REEL/FRAME:007467/0407 Effective date: 19931007 |
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Owner name: HOLOPHANE CORPORATION (SUCCESSOR BY MERGER TO HOLO Free format text: RELEASE OF PATENT AGREEMENTS;ASSIGNOR:WELLS FARGO BANK, N.A., AS AGENT;REEL/FRAME:009314/0787 Effective date: 19980323 |