US3377481A - Lighting fixture - Google Patents
Lighting fixture Download PDFInfo
- Publication number
- US3377481A US3377481A US648453A US64845367A US3377481A US 3377481 A US3377481 A US 3377481A US 648453 A US648453 A US 648453A US 64845367 A US64845367 A US 64845367A US 3377481 A US3377481 A US 3377481A
- Authority
- US
- United States
- Prior art keywords
- reflector
- lamp
- sections
- light
- housing
- 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
Links
- 230000004313 glare Effects 0.000 description 14
- 238000005286 illumination Methods 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 229940020445 flector Drugs 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- F21S8/02—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
-
- 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
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
-
- 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
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
-
- 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
- F21V17/16—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 by deformation of parts; Snap action mounting
- F21V17/162—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 by deformation of parts; Snap action mounting the parts being subjected to traction or compression, e.g. coil springs
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
-
- 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
- F21V7/0025—Combination of two or more reflectors for a single light source
-
- 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
-
- 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
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
Definitions
- a lamp adjust bracket constructed to enable adjusting the position of a lamp socket in a vertical plane and angularly with respect to such plane, and the combination of the lamp adjust bracket within a housing and related to a reflector mounted within and at the lower end of the housing.
- the invention relates to lighting fixtures of the hidden source type, and is more particularly directed to improvements in reflectors for such type of lighting fixtures.
- the glare Zone of a reflector for a lighting fixture is the sight angle most common to viewers approaching the fixture.
- the illumination zone is the area of desired illumination. It is desirable to produce a reflector for a hidden source lighting fixture which can produce near total darkness throughout the glare zone regardless of the beam spread, focusing angle, or lamp recessed position. Further, it is desirable to produce a lighting fixture whose beam spread, focusing angle, or lamp recessed position can be simply and easily adjusted.
- the outside diameter of a reflector is the dimension of prime importance since any increase in this diameter necessitates an increase in the fixture housing diameter, a condition objectionable on both aesthetic and economic grounds.
- an increase in the outside diameter of the reflector also requires an increase in the height thereof, and this increase is objectionable where the recessing of the fixture in a shallow ceiling plenum is desired, as well as for aesthetic and economic reasons.
- the baflling reflector is made with horizontally extending opaque rings spaced vertically beneath the light source in such positions that the inside wall of the fixture housing is completely in the shadow cast by the rings.
- the bell-shaped reflector which is adapted to be placed beneath the light source, has a curvature such that light striking it is reflected downwardly or away from the glare zone.
- the width of the horizontally extending baflling rings must be at least as great as the spacing between adjacent rings.
- the spacing between adjacent rings must be reduced.
- the edge of each baflling ring appears as 3,377,481 Patented Apr. 9, 1968 a brightly illuminated line to observers in the glare zone. The resultant series of illuminated lines is aesthetically objectionable.
- each horizontally extending ring receives light from the source and acts as a reflector which tends to light up the shadow cast by the ring above it.
- This condition may be checked by painting the rings with a light absorbing paint to reduce reflection and then spacing the rings so that the distance between the reflecting surface and the shadowed under surface of the ring above it is large enough to allow suflicient secondary dissipation of that portion of the light which is reflected.
- secondary dissipation cannot take place to the necessary degree and a marked lighting up of the shadow occurs.
- the bell-shaped reflector operates by presenting a mirror surface to the light at such an angle that the light will be reflected downwardly.
- the bell-shaped reflector must have a parabolic curvature whereby the angle between the tangent of the surface adjacent the upper edge of the parabolic surface and the horizontal top edge of such surface is quite shallow.
- the lower end of the reflector is necessarily quite large in diameter; that is, close to twice the diameter of the lamp to be positioned with respect to the reflector.
- Another object of the invention is to provide an improved hidden source lighting fixture.
- a further object of the invention is to provide an improved reflector for a hidden source lighting fixture which affords near total darkness throughout the glare zone regardless of the beam spread, the focusing angle, or recessed position of the lamp associated with the reflector.
- Still another object of the invention is to provide an improved reflector having a minimum outside diameter coupled with minimum height to thereby minimize the size of the lighting fixture in which it is mounted.
- Still a further object of the invention is to provide an improved reflector which need not be removed from the lighting fixture in which it is mounted when relamping, the reflector however also being constructed to permit a lamp to be easily removed and replaced for cleaning pur-' poses if necessary.
- Still another object of the invention is to provide an improved hidden source lighting fixture wherein the light source may be angularly adjusted for any beam angle and the light sources may be readily adjusted for recessing at a plurality of diflerent positions.
- FIG. 1 is a vertical cross-sectional view, on a reduced 3 scale, of a lighting fixture including the reflector of the present invention
- FIG. 2 is a vertical cross-sectional view taken approximately in the plane of line 22 of FIG. 1;
- FIG. 3 is a vertical cross-sectional view of the reflector, this view also showing a lamp mounted in uppermost position with respect to the reflector, and further illustrating the light pattern furnished by the reflector;
- FIG. 4 is a bottom plan view of a bracket which may be used to adjustably support a lamp with relation to the reflector;
- FIG. 5 also is a bottom plan view of the bracket, this view however showing the position of the bracket adjusted to furnish a beam angle of ten degrees;
- FIG. 6 is a side elevational view of the bracket shown in FIGS. 4 and 5;
- FIG. 7 is a vertical cross-sectional view of the reflector similar to the showing of FIG. 3, this view, however, showing a lamp mounted in the lowermost position with respect to the reflector;
- FIG. 8 is also a vertical cross-sectional view of the reflector, this view showing a lamp angularly mounted with respect to the reflector.
- a hidden source lighting fixture A has a reflector B mounted therein.
- the reflector is made to provide a highly specular inner surface and is designed to direct all light striking it away from the glare zone.
- FIG. 3 illustrates the light pattern afforded by the reflector when a lamp C is associated with the reflector, the lamp being shown in its uppermost position.
- the glare zone is defined by the sight angles most common to viewers approaching the reflector or the lighting fixture within which the reflector is mounted.
- the glare zone a is the area defined by the angle subtended between the cut-off line b of the reflector and a horizontal plane.
- the cut-off line defines beams of light which may extend from a point at the upper edge to a point 22 on the lower edge of the reflector farthest from the point 20.
- the illumination zone is designated 1'.
- the reflector B is made of two or more annular sections, each having a wall portion which is tapered inwardly from the bottom toward the top end of the section.
- the larger and smaller diameters of a section are respectively substantially equal to such diameters of the adjoining section.
- each section is in the form of a short truncated cone.
- the reflector is made of three sections, 24, 26 and 28.
- the reflector sections are formed so that when stacked and connected to one another in axially aligned, nested relationship, a lower section overlaps an upper section, or the section immediately above it.
- the area of overlap, together with a return segment provided to extend downwardly from the inclined wall of the upper section furnish reflecting surfaces for directing light back to a lamp reflector for the redirection of the light into the illumination zone.
- the inner sides of the reflector sections and the outer side of that portion of a section at the area where it overlaps an upper section are provided with a specular or reflecting surfaces.
- the entire outer side of each reflector section, as well as its inner side, are provided with specular surfaces.
- each reflector section has a taper which extends inwardly from the sections point 29 of widest diameter toward the top edge of the respective section, the angle of taper being designated c.
- the point of widest diameter is the aforementioned point 22.
- the major diameters of the sections 26 and 28 at the points 29 and of the section 24 at the point 22 are substantially equal.
- the angle of taper c is approximately 71.
- the sections 26 and 28 are respectively secured to the sections 24 and 26 by the flanges 30 and 32.
- the flanges 30 and 32 extend substantially parallel and in spaced relation to the inwardly tapered walls 31 and 33 of the sections 26 and 28, respectively.
- the reflector sections 24 and 26 are indented or reduced in diameter at their upper portions 34 and 36 to receive the overlying flanges 30, 32.
- the sections 26 and 28 are respectively connected to the sections 24 and 26 in any desired manner. Any suitable adhesive may be used to adhere the flanges 30, 32 to the adjacent portions of the walls of the sections which they overlie. If desired, the connection of one reflector section to a section immediately beneath the same may be accomplished by spot welding. Also, the sections may be connected to one another by friction or force fit.
- a return segment 38 intermediate the inwardly tapered wall 31 and the flange 30.
- a return segment 40 is provided between the inwardly tapered wall 33 and the flange 32 of the section 28.
- the return segment and flange of a reflector section are made integral with the inwardly tapered wall of the section.
- the return segments 38 and 40 are each at an angle d of approximately to the plane of their respective inwardly tapered walls 31 and 33.
- the geometry of the annular re flector sections and their relationship to one another is such that the top edges 42 and 44 of the sections 24 and 26, respectively, extend above the lower ends of the return segments 38 and 40.
- these overlap areas are provided with reflecting surfaces on their outer sides.
- the minor diameters of the sections 24, 26 and 28 at the points 42, 44 and 20, respectively, are substantially equal.
- the reflector sections are preferably made of a light, strong material such as aluminum. Other materials such as steel or molded plastic may be used.
- the reflector sections are each coated on their inner and outer surfaces with a highly specular black anodized coating. It will be understood, however, that any other highly reflecting or specular surface may be provided.
- the reflector sections are made of aluminum, they may 'be anodized gold or silver. If steel ora plastic material is used for the reflector sections, a highly polished chromium coating may be applied thereto.
- the number of reflector sections used will depend upon the angle of the cut-ofli line b desired. With more reflector sections stacked one upon another, the effective illuminated area, or illumination zone i, will become smaller in diameter, assuming that the lamp C will be located in its uppermost position. Since the height of each reflector section is comparatively small, on the order of approximately two inches for a major diameter of approximately six inches, the angles of the direct reflecting surfaces are shallow without increasing the diameter of the reflector. The reflector therefore is much smaller in size than may be achieved with the baflle or bell-shaped type of reflector of the prior art.
- the reflector sections 24, 26 and 28 are stacked in a way so that they are nested or telescoped, they form a light battling overlap at the aforementioned areas 46 and 48. Light striking the lower end of the wall 33 of section 28 would normally be reflected into the glare zone; similarly, light striking the lower end of the wall 31 of section 26 would also be reflected into the glare zone.
- the overlap portions 46 and 48 catch the light and redirect it back to the lamp C for reflection approximately along its path of incidence. Moreover, the overlap portions 46 and 48 terminate at the edges 42 and 44, respectively. The edges are positioned away from rather than facing the viewer approaching in the glare zone. Thus, a person approaching from the glare zone a will not see rings formed by the illumination of the top edges 42 and 44. As a result, one of the essential disadvantages of the bathing type of reflector is obviated.
- FIG. 1 illustrates the described reflector B included as part of a fixture A.
- the fixture comprises a housing 50 and common means for supporting the reflector and a bracket for adjustably positioning a lamp C.
- the housing 50 is tubular and preferably cylindrical in shape in conformity with the preferred annular contour of the reflector. As shown, the housing is open at the bottom and has positioned in the lower part thereof the reflector B.
- the reflector is resilient maintained within the housing by a pair of spring members 52, 52' extending between the top edge 54 of the reflector and the support bracket 56.
- the lower end of the reflector B is provided with an outwardly extending flange 58 which abuts the lower edge 60 of the housing 50.
- the support 56 is in the form of a ring in conformity with the preferred cylindrical contour of the housing.
- the support 56 is secured to the inner surface of the housing at the upper end thereof by a series of set screws 62 which are extended through circumferentially spaced, downwardly extending cars 64.
- the support member 56 and associated parts may be cast integrally with the housing 50. Where the housing is made of aluminum, set screws of steel will bite into the wall of the housing to furnish the connection of the support 56 to the housing.
- the support 56 is provided with ears 63, 63 to which the upper ends of the springs 52, 52 are secured by screws 65.
- a cover plate 66 is positioned over the support 56 within the housing 50 with a close fit.
- the cover plate is provided with openings through which screws 68 are extended and threaded into the support 56.
- the cover member is positioned flush with the top edge of the housing as shown in FIGS. 1 and 2.
- a ring gasket 70 is positioned between the cover member 66 and the support 56.
- the cover member is provided with openings to permit the passage of wires (not shown) to extend to the base of a socket 72 mounted on a lamp adjusting bracket D.
- the cover member 66 may be provided with any suitable means (not shown) such as a series of holes with slotted extensions to enable the fixture to be mounted to a ceiling by screws or headed studs, as is well known in the art. Where it is desired that the fixture be mounted on a wall or on a J-box, or be provided with means suitable for mullion mounting, the fixture may be provided with mounting means 74 on the side thereof, as shown in FIG. 1.
- the lamp adjusting bracket D is suspended within the housing 50 of the fixture from the same support means 56 which serves to support the reflector C.
- the support means 56 is provided with a depending boss 76 located adjacent the wall of the housing 6 5 0.
- the bracket D has a longitudinally extending arm 78, the upper end 80 of which is secured to the boss 76 as by a pair of screws 82.
- the arm 78 lies adjacent the wall of the housing, and extends vertically in the housing when oriented as shown in FIG. 1.
- the lamp adjust bracket D is constructed to provide means for adjusting the position of the lamp in a vertical plane or to a desired recessed position and means for adjustment of a lamps angularity.
- the socket 72 is adjustably mounted upon an arcuate member 84.
- the socket is secured to a clamp bar 86 positioned on the underside of the arcuate member 84.
- a clamp bar 86' overlies the member 84.
- a pair of screws 88, 88 are extended through the clamp bars 86, 86' near their ends and clearing the edges of the arcuate member 84.
- the socket is maintained in fixed relationship in desired adjusted position upon the arcuate member 84.
- the position of the socket 72 may be adjusted along the length of the arcuate memher.
- the arcuate member 84 extends from the center of another arcuate member 90, which is preferably semicircular in contour.
- the arcuate member 90 lies in a plane parallel to the plane of the wall of the cylindrical housing 50.
- the arcuate member 84 extends radially of the housings wall.
- the member 84 will be referred to as the radial arcuate member and the member 90 as the circumferential arcuate member.
- the radial arcuate member 84 When oriented within the fixture A, as shown in FIG. 1, the radial arcuate member 84 has its arc of curvature extending in a downward direction.
- the inner end of the radial arcuate member is connected to the center of the circumferential arcuate member.
- the members are integrally connected in a single casting, the casting preferably being of aluminum.
- the assembly for angular adjustment is designated 92.
- the radial arcuate member is provided on its underside with indicia to indicate the position of angularity for the adjusted position of the socket along such member.
- the circumferential arcuate member is also provided with indicia to indicate its angular position, together with its rigidly connected radial arcuate member, with respect to the arm 78.
- the arm 78 is provided with means for adjusting the position along its height of the assembly 92, and also for adjusting the angular position of such assembly circumferentially with respect to the arm 78.
- the arm 78 is provided with a series of vertically spaced connecting means 94, 94' and 94" ranging respectively from the uppermost to the lowermost position for the socket-carrying assembly 92.
- Each of the spaced connecting means comprises a pair of wedge members 96, 96 spaced apart a distance to receive the circumferential arcuate member. As shown in FIG. 1, the wedge members 96 may be laterally spaced to extend from each side of the arm 78 in pairs.
- the wedge members 96 may extend from the front side of the arm for the width of the arm.
- the wedge members 96' are each provided with a threaded bore through which a set screw 98 is extended.
- the members 96 are preferably angled to overlie the circumferential arcuate member which is matingly angled to be received beneath the extension 96.
- the angularity indicia on the radial and circumferential arcuate members indicate the desired position of the socket, and the lamp, for the desired beam and focusing angle for a selectively adjusted recessed position of the lamp.
- the adjustability of the socket along the radial arcuate member and the adinstability of the circumferential arcuate member with respect to the arm 78 will be apparent from a comparison of FIGS. 4 and 5.
- the described lamp adjust bracket D including the assembly 92. furnishes simple and easy adjustability of lamp recessed position, beam spread and focusing angle. Angu lar adjustment up to 20 in either direction from center and rotational adjustment of 360 for any size lighting fixture isnow possible with a lamp adjust bracket of the invention.
- the multi-position lamp recessing adjustment means afforded by the bracket of the invention permits selection of optimum cut-off for specific illumination requirements at the site of installation. Proper utilization of the full range of beam characteristics offered by different lamps may be achieved in cylindrical source lighting by virtue of the selective combination of beam spread and recessing positions afforded by the described lamp adjust bracket. For example, in the uppermost position of the lamp C with respect to the reflector B, as shown in FIGS. 1 and 3, an intense narrow beam for accent lighting or general illumination from very high ceilings is afforded. In such position, a full 45 cut-off angle is afforded.
- the middle recessed position may be utilized with all lamps where intermediate values are desired, and where angled beam focusing is desired.
- a PAR-38 lamp up to 40 cut-off is achieved in such position.
- Up to 35 cut-off can be achieved with R40 lamps and A lamps with optional reflectors.
- the fixture A may be recessed in a ceiling with the lip 58 flush with the ceiling, whereby the fixture becomes a recessed ceiling lighting fixture.
- the reflector of the invention frees cylindrical source lighting design from the limitations of rigid, vertical beam installations. Cylindrical sources may now be used where they were never applicable before to sharply spotlight specific facades, to wash walls with aimed and controlled light, and to throw illumination upon horizontal areas remote from the fixture.
- the reflector may be used in conjunction with other housings and the described lamp adjust bracket may be used in conjunction with other reflector structures, although the lamp adjust bracket described is particularly suitable for use in conjunction with the reflector of the invention.
- the reflector of the invention may be used with other types of lamp mounting means including nonadjustable lamp mounting means.
- the lower end of the housing may be provided with a protective grill, whereby the reflector would be raised a commensurate amount within the housing and secured in fixed position with respect to the housing by any suitable means.
- a light fixture comprising a tubular housing, an annular reflector mounted within the housing at the lower end thereof, and a bracket positioned to adjustably mount a lamp socket with respect to said reflector, said bracket comprising a vertically extending arm connected to the Wall of said housing, said arm having a series of vertically spaced connecting means to removably receive in selected vertical position an assembly for angularly adjusting the position of a lamp with respect to the reflector, said assembly comprising a circumferential arcuate member receivable in any one of said series of vertically spaced connecting means, said circumferential arcuate member being rotatably adjustable with respect to said arm in each of said series of vertically spaced connecting means, and a radial arcuate member connected at one end thereof to said circumferential arcuate member, said radial arcuate member providing mounting means for a lamp socket at selected adjusted positions along its length.
- a light fixture comprising a tubular housing, an nular support means within the housing ,near the upper end thereof, an annular reflector mounted within the housing at the lower end thereof, the reflector having an annular lip at its lower end in engagement with the bottom edge of the housing, a pair of spring members connected at the lower ends to the upper edge of the reflector, the upper ends of the springs being connected to said support means, and a bracket positioned to adjustably mount a lamp with respect to said reflector, said bracket comprising a vertically extending arm having its upper end connected to said support means, said arm having a series of vertically spaced connecting means to removably receive in selected vertical position an assembly for angularly adjusting the position of a lamp with respect to the reflector, said assembly comprising a circumferential arcuate member receivable in any one of said series of vertically spaced connecting means, said circumferential arcuate member being rotatably adjustable with respect to said arm in each of said series of vertiaclly spaced connecting means, and
- annular reflector comprises an upper annular section and a lower annular section connected to one another in axially aligned, nested relationship, each of the sections having a wall portion tapered inwardly from the bottom end toward the upper edge thereof, the diameters of the tapered wall portions of the upper and lower sections at their respective bottom ends being substantially equal and the diameters of tapered wall portions of the upper and lower sections at their respective top edges being substantially equal, said upper section having a return segment extending from the bottom end of its tapered wall portion to the outer side of the lower section below the top edge thereof to provide an overlap, the inner sides of said sections having reflecting surfaces, and the outer side of the lower section at said overlap having a reflecting surface.
- a lamp adjust bracket comprising a longitudinally extending arm, said arm having a series of longitudinally spaced connecting means to removably receive in selected position along the length thereof an assembly for angularly adjusting the position of a lamp socket, said assembly comprising a circumferential arcuate member receivable References Cited UNITED STATES PATENTS 1,625,948 4/1927 Lang 240-103 2,094,670 10/1937 Rambusch 240-78 3,040,172 6/1962 Chan 24078 FOREIGN PATENTS 284,621 10/1928 Great Britain. 354,697 1931 Great Britain.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US648453A US3377481A (en) | 1965-09-09 | 1967-06-23 | Lighting fixture |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US486136A US3359415A (en) | 1965-09-09 | 1965-09-09 | Lighting fixture with nested reflectors |
US648453A US3377481A (en) | 1965-09-09 | 1967-06-23 | Lighting fixture |
Publications (1)
Publication Number | Publication Date |
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US3377481A true US3377481A (en) | 1968-04-09 |
Family
ID=27048588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US648453A Expired - Lifetime US3377481A (en) | 1965-09-09 | 1967-06-23 | Lighting fixture |
Country Status (1)
Country | Link |
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US (1) | US3377481A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4651260A (en) * | 1984-10-24 | 1987-03-17 | Prescolite Inc. | Roadway luminaire |
US8197115B2 (en) | 2008-12-30 | 2012-06-12 | Dean Andrew Wilkinson | Luminaire with adjustable light source |
US20150163860A1 (en) * | 2013-12-06 | 2015-06-11 | Lam Research Corporation | Apparatus and method for uniform irradiation using secondary irradiant energy from a single light source |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1625948A (en) * | 1923-05-14 | 1927-04-26 | Lang S Daylight Ltd | Lamp reflector |
GB284621A (en) * | 1927-02-01 | 1928-10-18 | Karl Tettschlag | Improvements in or relating to suspension devices for electric lamps |
GB354697A (en) * | 1929-02-18 | 1931-08-13 | Philips Nv | Improvements in joints |
US2094670A (en) * | 1936-06-09 | 1937-10-05 | Rambusch Decorating Company | Illuminating apparatus |
US3040172A (en) * | 1958-11-12 | 1962-06-19 | Lightolier Inc | Lighting fixture |
-
1967
- 1967-06-23 US US648453A patent/US3377481A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1625948A (en) * | 1923-05-14 | 1927-04-26 | Lang S Daylight Ltd | Lamp reflector |
GB284621A (en) * | 1927-02-01 | 1928-10-18 | Karl Tettschlag | Improvements in or relating to suspension devices for electric lamps |
GB354697A (en) * | 1929-02-18 | 1931-08-13 | Philips Nv | Improvements in joints |
US2094670A (en) * | 1936-06-09 | 1937-10-05 | Rambusch Decorating Company | Illuminating apparatus |
US3040172A (en) * | 1958-11-12 | 1962-06-19 | Lightolier Inc | Lighting fixture |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4651260A (en) * | 1984-10-24 | 1987-03-17 | Prescolite Inc. | Roadway luminaire |
US8197115B2 (en) | 2008-12-30 | 2012-06-12 | Dean Andrew Wilkinson | Luminaire with adjustable light source |
US20150163860A1 (en) * | 2013-12-06 | 2015-06-11 | Lam Research Corporation | Apparatus and method for uniform irradiation using secondary irradiant energy from a single light source |
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