GB2496885A - Adjustable lamp reflector having closed ends - Google Patents

Adjustable lamp reflector having closed ends Download PDF

Info

Publication number
GB2496885A
GB2496885A GB1120326.2A GB201120326A GB2496885A GB 2496885 A GB2496885 A GB 2496885A GB 201120326 A GB201120326 A GB 201120326A GB 2496885 A GB2496885 A GB 2496885A
Authority
GB
United Kingdom
Prior art keywords
piece
lamp reflector
reflector according
support member
text
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.)
Granted
Application number
GB1120326.2A
Other versions
GB201120326D0 (en
GB2496885B (en
Inventor
Raymond Paul George Passell
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB201120326D0 publication Critical patent/GB201120326D0/en
Publication of GB2496885A publication Critical patent/GB2496885A/en
Application granted granted Critical
Publication of GB2496885B publication Critical patent/GB2496885B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21V7/00—Reflectors for light sources
    • F21V7/10—Construction
    • F21V7/16—Construction with provision for adjusting the curvature
    • 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
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/10—Construction
    • F21V7/18—Construction with provision for folding or collapsing

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Abstract

An adjustable lamp reflector 100 having closed-ends preventing loss of light has a resilient sheet of material 102 which has a reflective surface (104, fig 2). Opposite ends of sheet 102 are connected to supports 106. Each support 106 has a curved edge 108 which is joined to sheet 102, causing sheet 102 to be biased into a correspondingly curved shape. Supports 106 provide the closed ends of reflector 100. Each support 106 comprises two pieces 116,118 which are moveable with respect to each other, for example, by a pivot 120 passing through holes 122,124 adjacent curved edge 108. The end pieces 116,118 can be adjusted between a closed position, in which curved edge 108 is approximately parabolic, and a open position, in which curved edge 108 is approximately a double parabolic shape.

Description

Adjustable Lamp Reflector Having Closed Ends The present invention is related to lamp reflectors for horticultural use, particularly lamp reflectors having adjustable curvature, and most particularly to lamp reflectors having adjustable curvature and close ends.
Lamp reflectors having adjustable curvature, because of the way in which the curvature is adjusted, lose light from their ends (US6053624). This means that although light may be focused laterally onto an area of illumination, light is lost longitudinally, which means that the lighting efficiency of the reflector is compromised.
Lamp reflectors having closed ends avoid this problem, but do not allow any lateral adjustment of the spread of light.
According to a first aspect of the invention, there is provided a lamp reflector with adjustable curvature comprising: a resilient sheet member having a reflective surface; a first and a second support member attached at opposing ends of the reflective surface, in which each support member comprises a first piece and a second piece; wherein, in use, the first piece and the second piece of each support member overlap to prevent escape of light from the ends of the reflector and are adapted to move with respect to each other to adjust the curvature of the reflecting surface. The fact that no light escapes from the ends of the reflector means that the effectiveness and efficiency of the light source is improved, whilst allowing the spread of light to be adjusted.
Preferably the first piece and the second piece of a support member are pivotally connected, wherein the first piece and the second piece of a support member move pivotally with respect to each other to adjust the curvature of the reflecting surface.
Preferably the first piece of a support member includes a slot and the second piece of a support member includes a locking means adapted to engage the slot so that the curvature may be adjusted and fixed. The locking means prevents one piece drooping down and away from the other piece. The locking means may be loosened, the angle of curvature adjusted, and then the fixing member tightened.
Preferably the first piece of a support member and the second piece of a support member each include a bracket, the two brackets being joined by a bar engaging each bracket so that the curvature may adjusted and fixed. Adjusting the distance between the brackets means that the degree of bias applied to the sheet can be varied.
Preferably each bracket comprises a threaded hole and the bar comprises a thread.
Turning the bar winds the brackets either together or apart, thus adjusting the shade.
Preferably each bracket comprises one or more pins which are able to engage with holes in the bar. The position of the pins in the holes determines a distance between the brackets and hence the degree of bias applied to the sheet, thus adjusting the shade.
Preferably the support members are attached to the sheet member by fasteners.
These allow the sheet to flex.
Preferably the lamp reflector includes a spine attached to the sheet member. The spine provides rigidity to the resilient sheet between the support members and allows the reflector to be suspended from a ceiling or other support so that plants beneath the shade can be illuminated. The spine provides a mounting for a light source.
Preferably the spine is attached to one or both of the support members. The spine provides rigidity to the support members.
Preferably the lamp reflector includes a light source.
Preferably the sheet member comprises one or more parts. This means that a lamp reflector having a sheet having a complex shape can be assembled from component parts.
The present invention will now be described, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a perspective view of the lamp reflector from above in its closed configuration; Figure 2 is a perspective view of an embodiment of the lamp reflector from below in its open configuration; Figure 3 is a side view of a support member showing the two pieces in their closed configuration; Figure 4 is a side view of a support member showing the two pieces in their open configuration; Figure 5 is a view of a disassembled support member showing the two pieces; Figure 6 is a view of an adjustment mechanism for the lamp reflector; Figure 7 is a view of component pads of an embodiment of the lamp reflector; Figure 8 is a view of a lamp reflector comprising two component pads; Figure 9a is a side view of a resilient sheet member, showing it to be substantially planar when not biased, and forming a curved shape when biased; and Figure 9b is a side view of a resilient sheet member comprising two parts, showing it to be substantially planar when not biased, and forming a curved shape when biased.
Figures 1 and 2 show an adjustable lamp reflector 100 having closed-ends 106,107 preventing loss of light and enabling light to be shone on a small area or on a large area, improving the effectiveness and efficiency of the light source. The reflector comprises a heat-resistant material such as a metal, for example, steel or aluminium, powder coated or pressed. If the light source does not produce large amounts of heat, the reflector may comprise a coated plastic material.
The reflector 100 includes a resilient sheet 102 of material which has a reflective surface 104. One end of sheet 102 is connected to a first support member 106, and an opposing end is connected to a second support member 107. Each support member 106,107 has a generally curved edge 108 which is joined to sheet 102, causing sheet 102 to be biased into a correspondingly curved shape as shown in the drawings. The shape enables light reflected from surface 104 to be focused, and it can be generally parabolic, as shown in Figures 1 and 2.
Spine 110 is attached to sheet 102 on the opposite side of reflective surface 104.
Spine 110 includes attachment points 112 so that in use reflector 100 can be suspended from a ceiling or other support so that plants beneath the shade can be illuminated. Spine provides a mounting point 114 for a light source. Spine 110 may also be attached to one or both of support members 106, 107 Figures 3 to 5 show one of the support members 106, 107 which together provide the closed ends of reflector 100. In Figures 3 to 5, only the first support member 106 is shown, but it will be understood that the second support member is similar. Thus, first support member 106 comprises first piece 11 6a and second piece 11 8a as shown, and second support member 107 (not shown) comprises a first piece 1 16b and a second piece 118b.
The first piece and the second piece of each support member overlap to prevent escape of light from the ends of the reflector and are adapted to move with respect to each other to adjust the curvature of the reflecting surface. In use, pieces 11 6a, 11 8a and 11 6b, 11 8b move with respect to each other, effectively changing the curvature of curved edge 108, and enabling light to be shone on a small area or on a large area.
In one embodiment, one or both of support members 106.107 comprise pivot means 120,122,124. For example in Figures 3 to 5,the first piece and the second piece of a support member are connected to each other by a pivot 120 passing through holes 122,124 in each piece. The pivot arrangement means that the end pieces can be adjusted between a fully closed position, shown in Figure 3, in which curved edge 108 is approximately parabolic, and a fully open position, shown in Figure 4, in which curved edge 108 is approximately a double parabolic shape. Holes 122,124 are typically adjacent the curved edge 108.
In another embodiment, one of the pieces comprises a locking means and the other piece comprises a slot. For example in Figures 3 to 5, one of the pieces 116a comprises locking means 126, and the other piece liBa has a curved slot 128. Typically, locking means 126 is a fastener, such as a bolt and a wing nut, and fastener 126 is located in slot 128, and serves to limit the movement of the two pieces 11 6a, 11 8a between the fully closed position and the fully open position. When the pieces 116a, 118a have been adjusted to give the desired degree of curvature, the fastener is engaged to lock the pieces 11 6a, 11 8a in position. This arrangement means that the reflector can be adjusted to enable light to be shone on a small area or on a large area without any loss of light from the ends of the reflector, improving the effectiveness and efficiency of the light source. Locking means 126 and slot 128 may be present on one support member or both. The use of overlapping pieces 1 16a, 11 Ba means that when they are moved with respect to each other the attached parabolic part spreads. As the pieces 11 6a, 11 Ba are also joined in the middle, the piece 118a having slot 128 can engage with fastener 126 to prevent the pieces 116a, llBa drooping down and away from each other. Reflector 100 is adjusted by simply loosening fastener 126, adjusting pieces 116a, llBa then tightening fastener 126.
Sheet 102 is connected to support members 106, 107 via brackets 130 and 132. This arrangement allows the required degree of flexibility for sheet 102 so that it may be biased to the desired degree of curvature.
A further advantage of the present invention is the fact that not only can the lateral spread of the light be adjusted as disclosed above, but when the pieces 11 6a, 11 8a and 1 16b, 118b move towards the fully open position, they flex and allow light to spread longitudinally.
Figure 6 shows a further embodiment comprising brackets 604 having threaded holes and attached to end pieces llGa, 118a, and a threaded bar 602 passes through them.
The bar has a left-handed thread at one end and a right-handed thread at the other. One bracket has a right-handed thread and the other has a left-handed thread so when the bar is turned the brackets are either wound together or apart thus adjusting the shade. Brackets 604 and threaded bar 602 may be present on one support member or both. In a further alternative, each bracket carries one or more pins which are able to engage with holes in the bar. The distance between the brackets, and hence the degree of bias applied to the sheet, is set according to which hole in the bar the pins on the bracket are located.
Sheet 102 can be generally rectangular, as shown in the Figures 1 and 2, but it may also be square.
The sheet may comprise a single part, as shown in Figure 1, which when not biased is substantially planar as shown in Figure 9a, in which sheet 102 is substantially planar when not biased, and forms the curved shape when biased as shown in the drawing. The sheet may comprise two parts, as shown in Figure 9b, which when not biased are substantially planar, and form the curved shape when biased as shown in the drawing.
Figures 7 and 8 show a lamp reflector of more complex shape comprising two parts 702, 704. Each part comprises a resilient sheet 102 of the kind shown in Figure 9b and having a reflective surface, first pieces 11 6a, 11 8a, second pieces 11 6b, 11 8b, and extension pieces 706. The two sheets can be joined by engaging slot 128 with fastener 126, as described above, forming two support members 106, 107. First pieces 116a, 118a and second pieces 1 16b, 1 18b are able to move with respect to one another as described above to bias resilient sheet 102.
Any shape is possible provided that two opposing ends comprise first piece 116a, 116b and second piece 118a, 118b, which are able to move with respect to one another as described above.

Claims (7)

  1. <claim-text>Claims 1. A lamp reflector with adjustable curvature comprising: a resilient sheet member having a reflective surface; a first and a second support member attached at opposing ends of the reflective surface, in which each support member comprises a first piece and a second piece; wherein, in use, the first piece and the second piece of each support member overlap to prevent escape of light from the ends of the reflector and are adapted to move with respect to each other to adjust the curvature of the reflecting surface.</claim-text> <claim-text>2. The lamp reflector according to claim 1 in which the first piece and the second piece of one or both support members are pivotally connected, wherein the first piece and the second piece of a support member move pivotally with respect to each other to adjust the curvature of the reflecting surface.</claim-text> <claim-text>3. A lamp reflector according to claim 1 or claim 2 in which the first piece and the second piece of one or both support members each comprise a slot and a locking means adapted to engage the slot wherein, in use, the curvature may be adjusted and fixed.</claim-text> <claim-text>4. A lamp reflector according to claim 3 in which the first piece of a support member includes the slot and the second piece of a support member includes the locking ni ea n 5.</claim-text> <claim-text>5. A lamp reflector according to any preceding claim in which the first piece of a support member and the second piece of one or both support members each include a bracket, the two brackets being joined by a bar engaging each bracket wherein, in use, the curvature may adjusted and fixed.</claim-text> <claim-text>6. The lamp reflector according to claim 5 in which each bracket comprises a threaded hole and the bar comprises a thread.</claim-text> <claim-text>7. The lamp reflector according to claim 5 in which each bracket comprises one or more pins which are able to engage with holes in the bar.9. A lamp reflector according to any preceding claim in which the support members are attached to the sheet member by fasteners.10. A lamp reflector according to any preceding claim including a spine attached to the sheet member.11. A lamp reflector according to any preceding claim including a spine attached to at least one of the support members.12. A lamp reflector according to any preceding claim including a light source.13. A lamp reflector according to any preceding claim in which the sheet member comprises two or more pads.14. A lamp reflector substantially as described herein with reference to the accompanying drawings.Amendments to the claims have been filed as follows Claims 1. A lamp reflector with adjustable curvature comprising: a resilient sheet member having a reflective surface; a first and a second support member attached at opposing ends of the reflective surface, in which each support member comprises a first piece and a second piece; wherein, in use, the first piece and the second piece of each support member overlap to prevent escape of light from the ends of the reflector and are adapted to move with respect to each other to adjust the curvature of the reflecting surface.
  2. 2. The lamp reflector according to claim 1 in which the first piece and the second piece of one or both support members are pivotally connected, wherein the first piece and the second piece of a support member move pivotally with respect to each other to adjust the curvature of the reflecting surface.
  3. 3. A lamp reflector according to claim 1 or claim 2 in which the first piece and the second piece of one or both support members each comprise a slot and a locking means adapted to engage the slot wherein, in use, the curvature may be adjusted and fixed.
  4. 4. A lamp reflector according to claim 3 in which the first piece of a support member includes the slot and the second piece of a support member includes the locking ni ea n 5.
  5. 5. A lamp reflector according to any preceding claim in which the first piece of a support member and the second piece of one or both support members each include a bracket, the two brackets being joined by a bar engaging each bracket wherein, in use, the curvature may adjusted and fixed.
  6. 6. The lamp reflector according to claim 5 in which each bracket comprises a threaded hole and the bar comprises a thread.
  7. 7. The lamp reflector according to claim 5 in which each bracket comprises one or more pins which are able to engage with holes in the bar.9. A lamp reflector according to any preceding claim in which the support members are attached to the sheet member by fasteners.10. A lamp reflector according to any preceding claim including a spine attached to the sheet member.11. A lamp reflector according to any preceding claim including a spine attached to at least one of the support members.12. A lamp reflector according to any preceding claim including a light source.13. A lamp reflector according to any preceding claim in which the sheet member C) comprises two parts. r14. A lamp reflector according to claim 13 in which each first piece includes an extension o piece, and each second piece includes an extension piece.0) 15. A lamp reflector substantially as described herein with reference to the accompanying drawings.</claim-text>
GB1120326.2A 2011-03-08 2011-11-24 Adjustable lamp reflector having closed ends Expired - Fee Related GB2496885B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1103851.0A GB201103851D0 (en) 2011-03-08 2011-03-08 Adjustable lamp reflector having closed-ends

Publications (3)

Publication Number Publication Date
GB201120326D0 GB201120326D0 (en) 2012-01-04
GB2496885A true GB2496885A (en) 2013-05-29
GB2496885B GB2496885B (en) 2014-02-19

Family

ID=43923324

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB1103851.0A Ceased GB201103851D0 (en) 2011-03-08 2011-03-08 Adjustable lamp reflector having closed-ends
GB1120326.2A Expired - Fee Related GB2496885B (en) 2011-03-08 2011-11-24 Adjustable lamp reflector having closed ends

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB1103851.0A Ceased GB201103851D0 (en) 2011-03-08 2011-03-08 Adjustable lamp reflector having closed-ends

Country Status (1)

Country Link
GB (2) GB201103851D0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015225800A (en) * 2014-05-29 2015-12-14 三菱電機株式会社 Luminaire
US9451743B2 (en) 2014-07-02 2016-09-27 Ggt Holdings Las Vegas Inc. Rotating induction grow light system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107908A1 (en) * 2010-03-03 2011-09-09 Koninklijke Philips Electronics N.V. Collimator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011107908A1 (en) * 2010-03-03 2011-09-09 Koninklijke Philips Electronics N.V. Collimator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015225800A (en) * 2014-05-29 2015-12-14 三菱電機株式会社 Luminaire
US9451743B2 (en) 2014-07-02 2016-09-27 Ggt Holdings Las Vegas Inc. Rotating induction grow light system

Also Published As

Publication number Publication date
GB201120326D0 (en) 2012-01-04
GB2496885B (en) 2014-02-19
GB201103851D0 (en) 2011-04-20

Similar Documents

Publication Publication Date Title
US7156539B2 (en) Adjustable reflector device
CA2509467C (en) Luminaire with heat shield
US8276867B2 (en) Adjustable projector bracket assembly
US6783263B1 (en) Adjustable reflector device
US20090145423A1 (en) Solar-panel unit
CA2645968C (en) Adjustable reflector luminaire
AU2013220021A1 (en) Regulation and/or locking device for a plate
CA2570229A1 (en) Adjustable hanger bar assembly with bendable portion
WO2013157943A1 (en) Lighting device with adjustable lighting angle
GB2496885A (en) Adjustable lamp reflector having closed ends
US20220228755A1 (en) Heater directional reflectors
US10060584B2 (en) LED luminaire
KR102217977B1 (en) Floodlight with improved angle control and heat dissipation
CN205842535U (en) A kind of light fixture of scalable illuminating area
US8616262B2 (en) Adjustable fastening plate for tensioning a flexible sheet by cables without changing the shape thereof
AU2003205431B2 (en) A luminaire arrangement
KR101817248B1 (en) floodlight
US20180087753A1 (en) Light Fixture with Adjustable Reflector Blades
WO2011061364A2 (en) Adjustable structure for a parabolic reflector
KR100575429B1 (en) frame-fixing apparatus
TWM568346U (en) Quickly removable and mountable bracket structure
AU2012202049A1 (en) A Luminaire Reflector Locating Arrangement
KR100740244B1 (en) Mounting apparatus for lighting devices of corrugated matter plate structure
US20120268948A1 (en) Lighting control apparatus and method
JP2016030909A (en) Eaves gutter hanger

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20191124