WO1993006414A1 - Luminaires - Google Patents

Luminaires Download PDF

Info

Publication number
WO1993006414A1
WO1993006414A1 PCT/GB1992/001720 GB9201720W WO9306414A1 WO 1993006414 A1 WO1993006414 A1 WO 1993006414A1 GB 9201720 W GB9201720 W GB 9201720W WO 9306414 A1 WO9306414 A1 WO 9306414A1
Authority
WO
WIPO (PCT)
Prior art keywords
luminaire
reflectors
frame
reflector
lamp
Prior art date
Application number
PCT/GB1992/001720
Other languages
French (fr)
Inventor
Malcolm John Richards
Original Assignee
D.W. Windsor Limited
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 D.W. Windsor Limited filed Critical D.W. Windsor Limited
Priority to AU25910/92A priority Critical patent/AU662015B2/en
Priority to EP92919753A priority patent/EP0604515B1/en
Priority to JP50591293A priority patent/JP3509096B2/en
Priority to CA002119469A priority patent/CA2119469C/en
Priority to US08/204,415 priority patent/US5426575A/en
Priority to DE69215882T priority patent/DE69215882T2/en
Publication of WO1993006414A1 publication Critical patent/WO1993006414A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment

Definitions

  • This invention relates to luminaires, specifically to those for use in lighting situations in which it is not desired to achieve equal lighting at all positions illuminated by the luminaire.
  • 'luminaire* is meant an apparatus which distributes, filters and/or transforms light from one or more lamps mounted in the apparatus.
  • the fixed light distribution does not prove to be a problem.
  • lighting situations such as in a subway, where a luminaire of fixed light distribution may result in either a large wastage of light to ensure that all the area is adequately illuminated, which in a subway results in a higher than necessary degree of illumination of the walls and certain parts of the floor surface, or it may result in inadequate lighting of the entire area but not wastage of light.
  • each luminaire so as to give the light distribution best suited to the proposed position in which the luminaire is to be mounted. This option, however, is not feasible economically.
  • luminaires with two reflectors of which each can swivel relative to a fixed lamp, to vary the distribution of illumination. It is also known to vary the distribution of illumination by moving the light source relative to the reflectors.
  • a luminaire comprising a frame, four or more reflectors mounted on the frame to circumscribe a light source and to reflect light emitted therefrom, wherein the reflectors are pivotally mounted on the frame and associated with means for fixing their position with respect to the frame.
  • the luminaire may be adapted to be located about a fixed lamp, or it may itself include a socket for a lamp.
  • the socket (and thus the lamp) may be fixed or it may be movable in the frame relative to the reflectors to vary the pattern and distribution of illumination.
  • Figure 1 shows a perspective view of a luminaire according to the present invention in a preferred embodiment
  • Figure 2 shows a side elevation of a lantern fitted with a luminaire of the present invention
  • Figure 3 is a side elevation of the luminaire of Figure 1 in a position in which it throws light down, and
  • Figure 4 is a scrap perspective view of one reflector in position.
  • a luminaire 2 comprises a frame 4 on to which are pivotally attached four reflectors 6, each being attached by, and pivoting about the main axis of, a pivot screw 8, being locked in position by a lock screw 20. Also attached to frame 4 is a lamp holder 10, in which is a lamp 12. Although screws are described, other forms of pivots and clamps could be used.
  • Figure 1 is a perspective view of what would be the underside of the luminaire when mounted, as is usual, to direct downwards the light from lamp 12.
  • Frame 4 is in the form of a metal box, with a hexagonal aperture 14 in the base 13 of the box.
  • the walls 23 of the box 4 are formed with flanges 15 in which are holes 16 by means of which screws or the like may be used to mount the luminaire in a lantern 21 ( Figure 2) able to be mounted at an appropriate height above the path or other surface to be lit at night.
  • Frame 4 may, in other embodiments, be of any substantially hollow form determined by the final desired shape of the luminaire.
  • a U-shaped bracket 22 Secured to, or integral with, the frame 4 is a U-shaped bracket 22 to which the lampholder 10 may be secured and of which an inside surface 9, opposite the aperture 14, is of a reflective white material or paint.
  • Each reflector 6 extends from near the rear reflective surface 9 to base 13, and is attached by at least the pivot screw 8 at one end of the reflector to the base adjacent to an edge of aperture 14.
  • the reflectors 6 and screws 8 are arranged so that on each side of the median axis of aperture 14 there are two reflectors 6 fixed with their screws 8 adjacent to each other and the reflectors extending away from each other.
  • each reflector 6 has a substantially-triangular base 17 having the individual reflective facets 18 formed by folding the material of the reflector, such as polished aluminium sheet, about parallel fold lines 19.
  • each reflector 6 When its respective pivot screw 8 is not tight, each reflector 6 is able to be pivoted about the main axis of the screw, the axis being substantially perpendicular to the base 13, with the base 17 of each reflector in sliding contact with the base 13.
  • Each reflector 6 is of sufficient length for its base at all angular positions to overlap the edges of aperture 14.
  • Each reflector 6 is of sufficient width, in the plane perpendicular to base 13, for its depth to be substantially the same as that between the base 13 and surface 9.
  • each reflector comprises four substantially- rectangular plane facets angled to each other about a fold line, the major axis of each facet running substantially parallel to base 13.
  • reflectors 6 are specular reflectors.
  • the lamp holder 10 is located between two free ends of the two adjacent reflectors 6.
  • the pivot screws 8 are loosely done up, the reflectors 6 may easily be pivoted to alter the light distribution from the luminaire 2.
  • the pivot screws 8 are tightened and holes for lock screws 20 drilled and tapped, and the lock screws 20 inserted and tightened so that each reflector is held in position by two screws.
  • lock and pivot screws hold each reflector in position during storage, transit and installation. If the reflector as so held is distributing light where needed, then lock screw 20 is kept in place, but otherwise it is removed to permit adjustment of each reflector by pivotal movement of the reflector about its pivot screw 8.
  • the ability to alter the position of the reflectors 6 enables a wide range of light distribution patterns to be achieved.
  • the range of light distribution patterns achieved may be further widened by the use of different configurations for the reflector surfaces. All the reflectors in one luminaire may have identically-configured surfaces, but it is within the present invention for the reflectors to have different surface configurations and/or reflectivities.
  • a further widening of the range of light distribution patterns may also be achieved by allowing the position of the lamp holder, and hence the position of the lamp to be adjustable relative to the bracket 22 and to the frame 4.
  • the frame 4 as shown in square in plan, and is able to be secured to a four-sided lantern 21 by means of screws (not shown) extending through the apertures 16 into tapped holes in the lantern body.
  • the lantern body 21 comprises a metal or other framework 26 which has a base from which extends an electric cable 28 for the lamp circuitry. While each face of the lantern may have an individual pane of glass 30, it is preferred to insert into the framework a four-sided body of clear plastics material.
  • the cap 24 is preferably pivotally mounted in body 21, so as to give ready access to the lampholder and reflectors.

Abstract

A luminaire (2) has at least four reflectors (6) which may be individually pivoted about an axis provided by a screw (8) so that the distribution of light emitted by a lamp (12) located within the envelope of the reflectors may be altered and fixed to suit the environment that the luminaire is to illuminate.

Description

UMINAIRES
This invention relates to luminaires, specifically to those for use in lighting situations in which it is not desired to achieve equal lighting at all positions illuminated by the luminaire. By the term 'luminaire* is meant an apparatus which distributes, filters and/or transforms light from one or more lamps mounted in the apparatus.
It is known that in some lighting situations it is desired not to light uniformly the complete surroundings to a luminaire, but to direct the light in particular directions, for example the luminaire for a street light specifically directs in a downwards direction most of the light emitted by the lamp. The distribution of the light is fixed by the luminaire.
In some situations the fixed light distribution does not prove to be a problem. There are, however, lighting situations, such as in a subway, where a luminaire of fixed light distribution may result in either a large wastage of light to ensure that all the area is adequately illuminated, which in a subway results in a higher than necessary degree of illumination of the walls and certain parts of the floor surface, or it may result in inadequate lighting of the entire area but not wastage of light.
Theoretically it would be possible individually to manufacture each luminaire so as to give the light distribution best suited to the proposed position in which the luminaire is to be mounted. This option, however, is not feasible economically.
It is known to manufacture luminaires with two reflectors of which each can swivel relative to a fixed lamp, to vary the distribution of illumination. It is also known to vary the distribution of illumination by moving the light source relative to the reflectors.
Neither of these options gives a very satisfactory range of light distribution.
According to the present invention there is provided a luminaire comprising a frame, four or more reflectors mounted on the frame to circumscribe a light source and to reflect light emitted therefrom, wherein the reflectors are pivotally mounted on the frame and associated with means for fixing their position with respect to the frame.
The luminaire may be adapted to be located about a fixed lamp, or it may itself include a socket for a lamp. The socket (and thus the lamp) may be fixed or it may be movable in the frame relative to the reflectors to vary the pattern and distribution of illumination. The present invention will be further described and explained by way of example with reference to the accompanying drawings, in which:
Figure 1 shows a perspective view of a luminaire according to the present invention in a preferred embodiment;
Figure 2 shows a side elevation of a lantern fitted with a luminaire of the present invention;
Figure 3 is a side elevation of the luminaire of Figure 1 in a position in which it throws light down, and
Figure 4 is a scrap perspective view of one reflector in position.
Referring to the drawings, a luminaire 2 comprises a frame 4 on to which are pivotally attached four reflectors 6, each being attached by, and pivoting about the main axis of, a pivot screw 8, being locked in position by a lock screw 20. Also attached to frame 4 is a lamp holder 10, in which is a lamp 12. Although screws are described, other forms of pivots and clamps could be used. Figure 1 is a perspective view of what would be the underside of the luminaire when mounted, as is usual, to direct downwards the light from lamp 12.
Frame 4 is in the form of a metal box, with a hexagonal aperture 14 in the base 13 of the box. The walls 23 of the box 4 are formed with flanges 15 in which are holes 16 by means of which screws or the like may be used to mount the luminaire in a lantern 21 (Figure 2) able to be mounted at an appropriate height above the path or other surface to be lit at night.
Frame 4 may, in other embodiments, be of any substantially hollow form determined by the final desired shape of the luminaire.
Secured to, or integral with, the frame 4 is a U-shaped bracket 22 to which the lampholder 10 may be secured and of which an inside surface 9, opposite the aperture 14, is of a reflective white material or paint.
Each reflector 6 extends from near the rear reflective surface 9 to base 13, and is attached by at least the pivot screw 8 at one end of the reflector to the base adjacent to an edge of aperture 14.
The reflectors 6 and screws 8 are arranged so that on each side of the median axis of aperture 14 there are two reflectors 6 fixed with their screws 8 adjacent to each other and the reflectors extending away from each other.
As shown in Figure 4, each reflector 6 has a substantially-triangular base 17 having the individual reflective facets 18 formed by folding the material of the reflector, such as polished aluminium sheet, about parallel fold lines 19.
When its respective pivot screw 8 is not tight, each reflector 6 is able to be pivoted about the main axis of the screw, the axis being substantially perpendicular to the base 13, with the base 17 of each reflector in sliding contact with the base 13. Each reflector 6 is of sufficient length for its base at all angular positions to overlap the edges of aperture 14. Each reflector 6 is of sufficient width, in the plane perpendicular to base 13, for its depth to be substantially the same as that between the base 13 and surface 9. In the preferred embodiment, each reflector comprises four substantially- rectangular plane facets angled to each other about a fold line, the major axis of each facet running substantially parallel to base 13. Preferably reflectors 6 are specular reflectors.
The lamp holder 10 is located between two free ends of the two adjacent reflectors 6.
In use, when the pivot screws 8 are loosely done up, the reflectors 6 may easily be pivoted to alter the light distribution from the luminaire 2. When the desired light distribution 2 has been achieved, either by trial and error or by way of predetermined settings, the pivot screws 8 are tightened and holes for lock screws 20 drilled and tapped, and the lock screws 20 inserted and tightened so that each reflector is held in position by two screws.
The lock and pivot screws hold each reflector in position during storage, transit and installation. If the reflector as so held is distributing light where needed, then lock screw 20 is kept in place, but otherwise it is removed to permit adjustment of each reflector by pivotal movement of the reflector about its pivot screw 8.
It may be seen that the ability to alter the position of the reflectors 6 enables a wide range of light distribution patterns to be achieved. The range of light distribution patterns achieved may be further widened by the use of different configurations for the reflector surfaces. All the reflectors in one luminaire may have identically-configured surfaces, but it is within the present invention for the reflectors to have different surface configurations and/or reflectivities.
A further widening of the range of light distribution patterns may also be achieved by allowing the position of the lamp holder, and hence the position of the lamp to be adjustable relative to the bracket 22 and to the frame 4.
The provision of more than four reflectors in one luminaire is also possible, to give a greater versatility to the range of light distribution patterns possible.
The frame 4 as shown in square in plan, and is able to be secured to a four-sided lantern 21 by means of screws (not shown) extending through the apertures 16 into tapped holes in the lantern body. The lantern body 21 comprises a metal or other framework 26 which has a base from which extends an electric cable 28 for the lamp circuitry. While each face of the lantern may have an individual pane of glass 30, it is preferred to insert into the framework a four-sided body of clear plastics material. The cap 24 is preferably pivotally mounted in body 21, so as to give ready access to the lampholder and reflectors.

Claims

1. A luminaire comprising a frame, four or more reflectors mounted around an aperture in the frame to circumscribe a lamp position and to reflect light emitted therefrom, wherein the reflectors are pivotally mounted on the frame and are associated with means for fixing their position with respect to the frame.
2. A luminaire according to claim 1, including a lamp holder arranged to locate a lamp substantially centrally to four reflectors arranged in a diamond shape around the lamp position.
3. A luminaire as claimed in Claim 1 or 2, in which each reflector has a substantially-triangular base in slidable contact with one surface of an apertured base member of the frame, and in which the adjacent ends of a pair of reflectors on each side of a median axis of the aperture are engaged by one of a pair of contiguous pivot members.
4. A luminaire as claimed in Claim 3, in which at least one of the reflectors is adapted to be engaged by a lock member for preventing it from pivoting about its pivot member.
5. A luminaire as claimed in any preceding Claim, in which the aperture in the base member is overarched by a bracket having its ends fast with the frame and carrying a lampholder.
6. A luminaire as claimed in any preceding Claim, in which each reflector is of polished metal having two or more facets in the shape of a parallelogram.
PCT/GB1992/001720 1991-09-20 1992-09-18 Luminaires WO1993006414A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU25910/92A AU662015B2 (en) 1991-09-20 1992-09-18 Luminaires
EP92919753A EP0604515B1 (en) 1991-09-20 1992-09-18 Luminaires
JP50591293A JP3509096B2 (en) 1991-09-20 1992-09-18 lighting equipment
CA002119469A CA2119469C (en) 1991-09-20 1992-09-18 Luminaires
US08/204,415 US5426575A (en) 1991-09-20 1992-09-18 Luminaires
DE69215882T DE69215882T2 (en) 1991-09-20 1992-09-18 TO SHINE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919120129A GB9120129D0 (en) 1991-09-20 1991-09-20 Luminaires
GB9120129.3 1991-09-20

Publications (1)

Publication Number Publication Date
WO1993006414A1 true WO1993006414A1 (en) 1993-04-01

Family

ID=10701749

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/001720 WO1993006414A1 (en) 1991-09-20 1992-09-18 Luminaires

Country Status (11)

Country Link
US (1) US5426575A (en)
EP (1) EP0604515B1 (en)
JP (1) JP3509096B2 (en)
AT (1) ATE146268T1 (en)
AU (1) AU662015B2 (en)
CA (1) CA2119469C (en)
DE (1) DE69215882T2 (en)
DK (1) DK0604515T3 (en)
ES (1) ES2097351T3 (en)
GB (1) GB9120129D0 (en)
WO (1) WO1993006414A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999011972A1 (en) * 1997-09-01 1999-03-11 Abele + Geiger Gmbh Reflector for external light
EP1925878A1 (en) * 2006-11-22 2008-05-28 Toplight N.V. Lighting apparatus
WO2012037630A1 (en) * 2010-09-23 2012-03-29 Bunge Alimentos S/A Liquid/semi-viscous water-in-oil emulsion and method for producing same

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5690422A (en) * 1995-09-25 1997-11-25 Lighting Research & Development, Inc. Sharp-cutoff luminaire having specular reflecting facets with fan-line geometry
US6607289B2 (en) 1995-10-04 2003-08-19 Leon Lassovsky Quick connect reflector holder
US6076943A (en) * 1995-10-04 2000-06-20 Lassovsky; Leon A. Luminaire
US6206548B1 (en) 1996-08-27 2001-03-27 Leon A. Lassovsky Luminaire module having multiple rotatably adjustable reflectors
US5931569A (en) * 1997-03-04 1999-08-03 Pittway Corporation Reflector with strobe light extending therefrom
US6814469B2 (en) * 2000-06-19 2004-11-09 Cooper Industries, Inc. Rotating reflector
US6623143B2 (en) 2000-07-06 2003-09-23 Honeywell International, Inc. Ceiling reflectors
US6969181B1 (en) 2001-05-08 2005-11-29 Genlyte Thomas Group Llc Fully recessed unit equipment luminaire
US6588916B2 (en) * 2001-08-27 2003-07-08 Honda Giken Kogyo Kabushiki Kaisha Paint booth lighting fixture
US6793375B2 (en) * 2001-10-19 2004-09-21 Honeywell International, Inc. Reflector with complex parabolid surface for elongated light source
GB0408656D0 (en) * 2004-04-19 2004-05-19 Abacus Holdings Ltd Reflector assembly
US7384167B1 (en) 2005-04-04 2008-06-10 Genlyte Thomas Group, Llc Optimal wall washing kick reflector
US7607794B1 (en) 2006-08-18 2009-10-27 Genlyte Thomas Group Llc Recessed wall-wash kick reflector
US7722208B1 (en) 2007-09-30 2010-05-25 Genlyte Thomas Group, Llc Recessed luminaire trim assembly
US8371726B2 (en) * 2009-05-27 2013-02-12 Koninklijke Philips Electronics N.V. Recessed luminaire with a reflector
US20150131275A1 (en) * 2015-01-20 2015-05-14 Ryan Robl Decorative Lighting Assembly

Citations (3)

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Publication number Priority date Publication date Assignee Title
BE348944A (en) *
CH370039A (en) * 1959-05-04 1963-06-30 Transelectric Rubeli Schenker Lighting fixture with variable reflector
DE1904982A1 (en) * 1969-02-01 1970-08-20 Siemens Ag Wide beam luminaire for one or more lamps with a rod-shaped lighting system, preferably a high-pressure sodium vapor lamp

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US3213271A (en) * 1963-05-10 1965-10-19 Gen Electric Luminaire
DE2417605C3 (en) * 1974-04-10 1980-10-16 Siemens Ag, 1000 Berlin Und 8000 Muenchen Broad beam street light
US4041306A (en) * 1975-12-15 1977-08-09 Kim Lighting, Inc. Luminaire and reflector therefor
US4053766A (en) * 1975-12-23 1977-10-11 U.S. Industries, Inc. Lamp lens structure
US4651260A (en) * 1984-10-24 1987-03-17 Prescolite Inc. Roadway luminaire
US4616296A (en) * 1985-08-07 1986-10-07 Alkco Manufacturing Company Lamp
US4872098A (en) * 1989-03-20 1989-10-03 Lpi Limited Partnership Variable beam floodlight
US4979086A (en) * 1990-04-12 1990-12-18 Lowering Systems, Inc. Luminaire having main and secondary reflector sections

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE348944A (en) *
CH370039A (en) * 1959-05-04 1963-06-30 Transelectric Rubeli Schenker Lighting fixture with variable reflector
DE1904982A1 (en) * 1969-02-01 1970-08-20 Siemens Ag Wide beam luminaire for one or more lamps with a rod-shaped lighting system, preferably a high-pressure sodium vapor lamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999011972A1 (en) * 1997-09-01 1999-03-11 Abele + Geiger Gmbh Reflector for external light
EP1925878A1 (en) * 2006-11-22 2008-05-28 Toplight N.V. Lighting apparatus
BE1017369A3 (en) * 2006-11-22 2008-07-01 Toplight Nv LIGHTING DEVICE.
BE1018445A3 (en) * 2006-11-22 2010-12-07 Toplight Nv LIGHTING DEVICE.
WO2012037630A1 (en) * 2010-09-23 2012-03-29 Bunge Alimentos S/A Liquid/semi-viscous water-in-oil emulsion and method for producing same

Also Published As

Publication number Publication date
AU2591092A (en) 1993-04-27
AU662015B2 (en) 1995-08-17
DE69215882T2 (en) 1997-06-12
ATE146268T1 (en) 1996-12-15
DE69215882D1 (en) 1997-01-23
ES2097351T3 (en) 1997-04-01
JP3509096B2 (en) 2004-03-22
DK0604515T3 (en) 1997-06-02
EP0604515A1 (en) 1994-07-06
JPH06510882A (en) 1994-12-01
CA2119469C (en) 2001-11-27
EP0604515B1 (en) 1996-12-11
GB9120129D0 (en) 1991-11-06
US5426575A (en) 1995-06-20
CA2119469A1 (en) 1993-04-01

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