CA1072932A - Luminaire - Google Patents
LuminaireInfo
- Publication number
- CA1072932A CA1072932A CA261,975A CA261975A CA1072932A CA 1072932 A CA1072932 A CA 1072932A CA 261975 A CA261975 A CA 261975A CA 1072932 A CA1072932 A CA 1072932A
- Authority
- CA
- Canada
- Prior art keywords
- luminaire
- end walls
- face
- torsion
- fitter
- 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
Links
Classifications
-
- 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
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/10—Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards
- F21V21/116—Fixing lighting devices to arms or standards
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Case 2444 ABSTRACT OF THE DISCLOSURE
There is particularly taught a pedestrian cross walk sign and combined luminaire adapted for rigid suspension above the cross walk. The housing of the luminaire comprises a folded sheet metal structure including end walls and a top wall. The end walls are interconnected by a torsion tube.
A slip fitter is located on the top wall and is supported from the torsion tube by a bracket.
There is particularly taught a pedestrian cross walk sign and combined luminaire adapted for rigid suspension above the cross walk. The housing of the luminaire comprises a folded sheet metal structure including end walls and a top wall. The end walls are interconnected by a torsion tube.
A slip fitter is located on the top wall and is supported from the torsion tube by a bracket.
Description
Case 2444 '~O~Z~Z
m is invention concerns luminaires and illuminated signs. It is particularly directed to a pedestrian cross-walk sign and luminaire combination, although not restricted thereto.
In an outdoor luminaire which is required to be rigidly interconnected to a boom the resultant structure is usually a compromise between cost, weight and rigidity. Many such luminaires employ cast housings in order to withstand the strong localized forces which may be imposed upon the housing especially in the region of the slip fitter joint. Even where the cagtings are made from aluminum or magnesium, the weight of a cross-walk luminaire is substantial.
Considerable weight and cost economy is effected where the luminaire is constructed from sheet metal, especially sheet aluminum, but several difficulties arise.
Thus th~ localized stress in the area of the 51ip fitter joint may eventually induce stress cracking of the metal. In the cross-walk sign and luminaire combination under consideration it was additionally found that only slight flexing of the casing permitted the escape of light from the luminaire to dazzle oncoming traffic. A further, related problem in such combination concerns the torsional rigidity of the structure.
The housing is generally of s~uare prismatic shape with window openings being provided in three adjacent surfaces 1 thereof to accommodate transparent or translucent window i or lens material. Since the window openings occupy a major proportion of the surfaces in which they are located the inherent rigidity o the integral structure is largely destroyed.
, Under wind generated loading the lateral twisting of the housing may be sufficient to dectroy the sealing between the window~
or lens and their surrounding openings. - ~
It is an object of my invention to provide an -I
aforesaid type of luminaire wherein the variou~ forces to which ~ z~3~ Case 2444 the erected construction is exposed may be more readily withstood.
In a luminaire having a housing which comprises a pair of generally opposed end walls, a pair of generally opposed side faces interconnecting the end walls and optionally one or more additional faces having perimetric portions in common with each said end wall and said side face, at least one of the faces having a substantial window opening therein, I provide a torsion tube or beam or other tor3ion resisting means which rigidly interconnects between the end walls of the housing internally thereof. A rigid connection to a suspending mast, boom or bracket may be made directly to the torsion tube or to a slip fitter connected thereto. Where the slip fitter locates on one of the faces of the housing, a rigid bracket is provided internally of the housing to interconnect between the torsion tube and the slip fitter. As an alternative the ! torsion tube itself may be deformed so as to interconnect to the slip fitter without necessitating any intermediate bracket.
I The luminaire will generally be a 5 or 6 sided polyhedron such ; 20 as a triangular prism, a truncated triangular pricm and a ~- rectangular prism, for example: other shapes are not excluded, ! the above examples nt being exhaustive.
In the accompanying drawings which illustrate a preferred constructive embodiment of the invention, Figure 1 is a sketch ghowing a pair of luminaires installed above a pedestrian cross-walk;
Figure 2 shows a luminaire of Figure 1 in a perspective, partially broken away view to reveal constructi~nal detail of the interior;
Figure 3 is a view taken along 3-3 of Figure 2.
Referring to Figures 2 and 3 wherein the luminaire of my invention is indicated generally by the numeral 10, this . . . : . :
Case 2444 may be seen to comprise a housing including a pair of opposed end walls 12, 14 interconnected by a pair of side faces 16, 18.
The housing further comprises a top face 20 and a bottom face 22 each of which has perimetric portions in common with end walls 12, 14 and side faces 16, 18. End walls 12, 14 and top face 20 are folded from a unitary sheet of aluminum. Side faces 16, 18 and bottom ~ace 22 are sub~tantially comprised respectively by windows including frames 24, 26, 28 formed from extruded aluminum section. In each frame is respectively sealed a light transmitting window material 17, 19, 23 which may be a plastic composition or glass. Side faces 16, 18 are unified with end walls 12, 14 and top wall 20 by any suitable means such as rivetting, bolting or brazing, for example.
Bottom face 22 is hinged along one side thereof at 29 to the lower edge of face 16; the opposed side of face 22 is supported from the lower edge of face 18 by slips 30. ~ottom face 22 may thus be released from its normal position to permit it to swing downwardly, thereby providing access to the interior of luminaire 10 for maintenance purposes.
Luminaire 10 i~ provided with a downwardly directed source of illumination comprising a pair of (250) watt high +rof~
A intensity discharge lamps 70 and concaveAreflector 72. With particular reference to Figure 1, luminaire 10 is normally suspended from a boom 60 adjacent the vehicular approach side of a pedestrian cross-walk, and downwardly dire~ted light i~
focussed rearwardly by angled reflector 72 to illuminate the cros~-walk. Cut off screen~ 32, 34, which form the lower portions of side faces 16, 18 respectively, reduce the angle of divergence of downwardly directed light, screen 34 particularly r~stricting the escape of light towards oncoming traffic. The general method of rigidly suspending traffic signs and luminaires rigidly from a boom 60 is by the use of a spring ~ 32 case 2444 loaded coupling interposed between the end of the boom and a slip fitter or other means located externally or intexnally of the housing of the luminaire. This coupling reduces vibrational shock transfer between the boom and the luminaire by permitting slight relative movement corresponding to an angular deflection in a major surface of the luminaire of about 7. m e optical geometry of the luminaire lO can be designed to accommodate this permitted movement whilst restricting the escape of illumination that would dazzle oncoming traffic. However further relative movement such as may occur by localized flexing of the housing in ~he region of the slip fitter, or by torsional distortion of the housing, may permit the e~cape of dazzling illumination. Such further relative movement is undesirable for other reasons as previously explained.
~he light weight, highly windowed structure so far described i8 insufficiently rigid to withstand the dynamic loading forces to which it is normally exposed when erected.
me stiffening and mounting means which I employ so as to ` overcome the problems spoken of comprise a torsion tube 40 which rigidly interconnects end walls 12, 14 internally of the luminaire 10. Such interconnection with the end walls is made through flanges 42, 44, which secure to the end walls with bolts 46. Flanges 42, 44 are each provided with a collar portion 43, 45 and are slidable along tube 40. Each collar portion has at least one radial locking screw 47, 49. In assembling torsion tube 40 within the housing of luminaire to flanges 42, 44 are introduced onto tube 40 without being locked in position. End walls 12, 14 are maintained with a predetermined spacing and tube 40 is offered into place within the housing.
The flanges 42, 44 are then secured to respective end walls 12, 14 with bolts 46 or other mean~, following which locking screws 47, 49 are tightened to unify the torsion resisting assembly.
:
10~32 case 2444 The luminaire 10 rigidified in the above described manner may be attached to a boom by a slip fitter means provided on either of the end walls 12 or 14 and which secures directly to a flange 42 or 43. As an alternative torsion tube 40 may project externally of the housing of luminaire lO to provide a direct coupling means to suspension boom. In the presently described embodiment it is preferred to suspend luminaire lO ~rom a boom 60 which interconnects to the top face 20 of the luminaire. A slip fitter 50 is secured to face 20. Slip fitter 50 is integrally connected to the torsion resisting means by a U shaped bracket 52 the legs of which are welded to tube 40 at 54. The distal ends o bracket 52 are overturned to form flanges 58 which underlay top face 20 and which bolt dixectly to slip fitter 50.
The bight portion 56 of bracket 52 forms a convenient means from which a high intensity discharge lamp 64 i9 mounted for the purpose of illuminating the window~ 17 and 19 which comprise the sign portion of luminaire lO. Current control ballasts 66 for lamps 64 and 70 are ~upported from tube 40 ~ ~ -either by being attached directly thereto, or indirectly sup-ported on trays 68 which couple to tube 40 which U bolts 69.
Such ballasts may be positioned externally of luminaire lO i desired.
: ' -
m is invention concerns luminaires and illuminated signs. It is particularly directed to a pedestrian cross-walk sign and luminaire combination, although not restricted thereto.
In an outdoor luminaire which is required to be rigidly interconnected to a boom the resultant structure is usually a compromise between cost, weight and rigidity. Many such luminaires employ cast housings in order to withstand the strong localized forces which may be imposed upon the housing especially in the region of the slip fitter joint. Even where the cagtings are made from aluminum or magnesium, the weight of a cross-walk luminaire is substantial.
Considerable weight and cost economy is effected where the luminaire is constructed from sheet metal, especially sheet aluminum, but several difficulties arise.
Thus th~ localized stress in the area of the 51ip fitter joint may eventually induce stress cracking of the metal. In the cross-walk sign and luminaire combination under consideration it was additionally found that only slight flexing of the casing permitted the escape of light from the luminaire to dazzle oncoming traffic. A further, related problem in such combination concerns the torsional rigidity of the structure.
The housing is generally of s~uare prismatic shape with window openings being provided in three adjacent surfaces 1 thereof to accommodate transparent or translucent window i or lens material. Since the window openings occupy a major proportion of the surfaces in which they are located the inherent rigidity o the integral structure is largely destroyed.
, Under wind generated loading the lateral twisting of the housing may be sufficient to dectroy the sealing between the window~
or lens and their surrounding openings. - ~
It is an object of my invention to provide an -I
aforesaid type of luminaire wherein the variou~ forces to which ~ z~3~ Case 2444 the erected construction is exposed may be more readily withstood.
In a luminaire having a housing which comprises a pair of generally opposed end walls, a pair of generally opposed side faces interconnecting the end walls and optionally one or more additional faces having perimetric portions in common with each said end wall and said side face, at least one of the faces having a substantial window opening therein, I provide a torsion tube or beam or other tor3ion resisting means which rigidly interconnects between the end walls of the housing internally thereof. A rigid connection to a suspending mast, boom or bracket may be made directly to the torsion tube or to a slip fitter connected thereto. Where the slip fitter locates on one of the faces of the housing, a rigid bracket is provided internally of the housing to interconnect between the torsion tube and the slip fitter. As an alternative the ! torsion tube itself may be deformed so as to interconnect to the slip fitter without necessitating any intermediate bracket.
I The luminaire will generally be a 5 or 6 sided polyhedron such ; 20 as a triangular prism, a truncated triangular pricm and a ~- rectangular prism, for example: other shapes are not excluded, ! the above examples nt being exhaustive.
In the accompanying drawings which illustrate a preferred constructive embodiment of the invention, Figure 1 is a sketch ghowing a pair of luminaires installed above a pedestrian cross-walk;
Figure 2 shows a luminaire of Figure 1 in a perspective, partially broken away view to reveal constructi~nal detail of the interior;
Figure 3 is a view taken along 3-3 of Figure 2.
Referring to Figures 2 and 3 wherein the luminaire of my invention is indicated generally by the numeral 10, this . . . : . :
Case 2444 may be seen to comprise a housing including a pair of opposed end walls 12, 14 interconnected by a pair of side faces 16, 18.
The housing further comprises a top face 20 and a bottom face 22 each of which has perimetric portions in common with end walls 12, 14 and side faces 16, 18. End walls 12, 14 and top face 20 are folded from a unitary sheet of aluminum. Side faces 16, 18 and bottom ~ace 22 are sub~tantially comprised respectively by windows including frames 24, 26, 28 formed from extruded aluminum section. In each frame is respectively sealed a light transmitting window material 17, 19, 23 which may be a plastic composition or glass. Side faces 16, 18 are unified with end walls 12, 14 and top wall 20 by any suitable means such as rivetting, bolting or brazing, for example.
Bottom face 22 is hinged along one side thereof at 29 to the lower edge of face 16; the opposed side of face 22 is supported from the lower edge of face 18 by slips 30. ~ottom face 22 may thus be released from its normal position to permit it to swing downwardly, thereby providing access to the interior of luminaire 10 for maintenance purposes.
Luminaire 10 i~ provided with a downwardly directed source of illumination comprising a pair of (250) watt high +rof~
A intensity discharge lamps 70 and concaveAreflector 72. With particular reference to Figure 1, luminaire 10 is normally suspended from a boom 60 adjacent the vehicular approach side of a pedestrian cross-walk, and downwardly dire~ted light i~
focussed rearwardly by angled reflector 72 to illuminate the cros~-walk. Cut off screen~ 32, 34, which form the lower portions of side faces 16, 18 respectively, reduce the angle of divergence of downwardly directed light, screen 34 particularly r~stricting the escape of light towards oncoming traffic. The general method of rigidly suspending traffic signs and luminaires rigidly from a boom 60 is by the use of a spring ~ 32 case 2444 loaded coupling interposed between the end of the boom and a slip fitter or other means located externally or intexnally of the housing of the luminaire. This coupling reduces vibrational shock transfer between the boom and the luminaire by permitting slight relative movement corresponding to an angular deflection in a major surface of the luminaire of about 7. m e optical geometry of the luminaire lO can be designed to accommodate this permitted movement whilst restricting the escape of illumination that would dazzle oncoming traffic. However further relative movement such as may occur by localized flexing of the housing in ~he region of the slip fitter, or by torsional distortion of the housing, may permit the e~cape of dazzling illumination. Such further relative movement is undesirable for other reasons as previously explained.
~he light weight, highly windowed structure so far described i8 insufficiently rigid to withstand the dynamic loading forces to which it is normally exposed when erected.
me stiffening and mounting means which I employ so as to ` overcome the problems spoken of comprise a torsion tube 40 which rigidly interconnects end walls 12, 14 internally of the luminaire 10. Such interconnection with the end walls is made through flanges 42, 44, which secure to the end walls with bolts 46. Flanges 42, 44 are each provided with a collar portion 43, 45 and are slidable along tube 40. Each collar portion has at least one radial locking screw 47, 49. In assembling torsion tube 40 within the housing of luminaire to flanges 42, 44 are introduced onto tube 40 without being locked in position. End walls 12, 14 are maintained with a predetermined spacing and tube 40 is offered into place within the housing.
The flanges 42, 44 are then secured to respective end walls 12, 14 with bolts 46 or other mean~, following which locking screws 47, 49 are tightened to unify the torsion resisting assembly.
:
10~32 case 2444 The luminaire 10 rigidified in the above described manner may be attached to a boom by a slip fitter means provided on either of the end walls 12 or 14 and which secures directly to a flange 42 or 43. As an alternative torsion tube 40 may project externally of the housing of luminaire lO to provide a direct coupling means to suspension boom. In the presently described embodiment it is preferred to suspend luminaire lO ~rom a boom 60 which interconnects to the top face 20 of the luminaire. A slip fitter 50 is secured to face 20. Slip fitter 50 is integrally connected to the torsion resisting means by a U shaped bracket 52 the legs of which are welded to tube 40 at 54. The distal ends o bracket 52 are overturned to form flanges 58 which underlay top face 20 and which bolt dixectly to slip fitter 50.
The bight portion 56 of bracket 52 forms a convenient means from which a high intensity discharge lamp 64 i9 mounted for the purpose of illuminating the window~ 17 and 19 which comprise the sign portion of luminaire lO. Current control ballasts 66 for lamps 64 and 70 are ~upported from tube 40 ~ ~ -either by being attached directly thereto, or indirectly sup-ported on trays 68 which couple to tube 40 which U bolts 69.
Such ballasts may be positioned externally of luminaire lO i desired.
: ' -
Claims (16)
1. In a luminaire having a housing including at least a pair of generally opposed end walls, a pair of generally opposed side faces interconnecting said end walls and at least one additional face having perimetric portions common with each end wall and side face, at least one of said faces having a substantial window opening therein, the improvement comprising a torsion resisting member rigidly interconnected with each said end wall, and slip-fitter mounting means for attaching said luminaire to a boom, said slip-fitter mounting means being integrally attached to said torsion resisting member.
2. The luminaire of claim 1 wherein said torsion resisting member is a torsion tube.
3. The luminaire of claim 2 wherein said torsion tube is interconnected to said end walls through flange members.
4. The luminaire of claim 3 wherein said flange members are slidably adjustable on said tube and wherein locking means is provided to lock said flange members on said tube.
5. The luminaire of claim 3 wherein said at least one additional face includes a top face, said slip-fitter being mounted on said top face, said slip fitter being rigidly interconnected to said torsion tube through a bracket means integral therewith.
6. The luminaire of claim 5 wherein said at least one additional face includes a bottom face generally opposed to said top face, and wherein each said side face and said bottom face has a substantial window opening therein.
7. The luminaire of claim 6 wherein said end walls and said top wall are folded from a continuous sheet metal.
8. The luminaire of claim 6 wherein a current limiting ballast is directly attached to said torsion tube.
Case 2444
Case 2444
9. The luminaire of claim 6 wherein a tray is directly attached to said torsion tube for the purpose of supporting a current limiting ballast thereon.
10. A luminaire for signalling a pedestrian cross walk comprising a generally rectangular prismatic housing including sheet metal end walls and top wall, light transmitting side faces and bottom face, torsion resisting means interconnecting said end walls, and slip fitter means for rigidly interconnecting said luminaire to a boom, said slip fitter means being rigidly interconnected by bracket means to said torsion resisting means.
11. The luminaire of claim 10 including a first light source positioned intermediate said light transmitting side faces, and a second light source positioned above said light transmitting bottom face, a downwardly directed concave reflector positioned intermediate said first and second light sources to direct light from said second light source downwardly and rearwardly from said luminaire.
12. The luminaire of claim 11 including at least one light cut-off screen to reduce the angle of divergence?
of said downwardly rearwardly directed light.
of said downwardly rearwardly directed light.
13. The luminaire of claim 12 wherein said cut-off screen generally forms a continuum of a side face.
14. The luminaire of claim 11 wherein said reflector is trough shaped and generally spans between said end walls.
15. The luminaire of claim 14 wherein said second light source includes a pair of lamps respectively positioned adjacent the ends of said reflector.
Case 2444
Case 2444
16. The luminaire of claim 10, 11 or 12 wherein said bracket means interconnects said torsion resisting means and said topwall, and said slip fitter connects to said bracket means at said topwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA261,975A CA1072932A (en) | 1976-09-24 | 1976-09-24 | Luminaire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA261,975A CA1072932A (en) | 1976-09-24 | 1976-09-24 | Luminaire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072932A true CA1072932A (en) | 1980-03-04 |
Family
ID=4106927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA261,975A Expired CA1072932A (en) | 1976-09-24 | 1976-09-24 | Luminaire |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1072932A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583854A1 (en) * | 1985-06-19 | 1986-12-26 | Thery Hindrick Sa | Mixed lighting illuminated traffic sign |
-
1976
- 1976-09-24 CA CA261,975A patent/CA1072932A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2583854A1 (en) * | 1985-06-19 | 1986-12-26 | Thery Hindrick Sa | Mixed lighting illuminated traffic sign |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |