STEPPED LIGHTING FIXTURE

Abstract: A stepped lighting fixture comprising a hollow main body generally cylindrical portion (10); a hollow central conical portion (12) flaring outwardly from the lower end of the main body portion; a lower hollow cylindrical portion (14) extending downwardly from the lower end of the central conical portion (12); a lower hollow conical reflector portion (16) flaring outwardly from the lower end of the lower cylindrical portion (14); an upper hollow conical bezel portion (18) extending upwardly and inwardly from the upper end of the main body portion (10); and an upper hollow cylindrical housing portion (20) extending upwardly from the upper end of the bezel portion (18). The various portions are selectively and releasably secured together by coacting thread means (62, 68), or by a unique clip (104) and groove (102) arrangement so as to provide a wide variety of appearance and functional combinations.

Description: STEPPED LIGHTING FIXTURE Description Background Of The Invention This invention relates to lighting fixtures or luminaires, and more particularly, to versatile or multi-purpose lighting fixtures. The typical lighting fixture is generally limited to a specific size, function, appearance and application. Whereas various attempts have been made to provide lighting fixtures offering versatility, none of these fixtures has achieved widespread commerical success because of one or more shortcomings. Specifically, the prior art attempt at versatility has resulted in lighting fixtures that were unduly expensive to manufacture; or have resulted in lighting fixtures that were ungainly in appearance; or have resulted in lighting fixtures that have failed to provide adequate lighting in all intended applications; or have resulted in lighting fixtures that were flimsy in construction and therefore shortlived. Summary Of The Invention This invention provides a lighting fixture which is inexpensive to manufacture; which is usable in a wide variety of lighting applications; which offers a variety of custom appearance combinations; and which provides an aesthetically pleasing appearance in all intended applications and in all available custom combinations. The invention lighting fixture, in its broadest sense, comprises a hollow main body generally cylindrical portion; a hollow central conical portion flaring outwardly from the lower end of the main body portion; a lower hollow cylindrical portion, having a diameter generally corresponding to the lower end diameter of the central conical portion, extending downwardly from the lower end of the central conical portion; and mounting means within the main body portion for mounting a lightbulb socket therewithin in a position extending and opening downwardly generally on the central vertical axis of the fixture. According to a further aspect of the invention, the invention lighting fixture further includes a lower conical portion which flairs outwardly from the lower end of the lower cylindrical portion. According to another aspect of the invention, the invention lighting fixture further includes an upper conical portion extending upwardly and inwardly from the upper end of the main body portion. According to yet another aspect of the invention, the invention lighting fixture further includes an upper cylindrical portion extending upwardly from the upper end of the upper conical portion. In the disclosed embodiment of the invention, the main body portion, the central conicial portion, and the lower cylindrical portion ar formed as an integral molded unit and the lower conical portion, the upper conical portion, and the upper cylindrical portion are formed as separate units. The various units are releasably secured together by suitable coacting means such as coacting threaded portions or by a unique coacting clip and groove arrangement. The various units may be selectively combined to produce a variety of custom combinations and, specifically, may be combined to produce six different combinations offering distinctly different appearances and intended for distinctly different applications. Brief Description Of The Drawings FIGURE 1 is an exploded perspective view of the invention lighting fixture; FIGURE 2 is a vertical cross-sectional view of the invention lighting fixture; FIGURES 3, 4 and 5 are fragmentary views of selected portions of the invention lighting fixture; FIGURES 6, 7 and 8 are fragmentary views showing an alternative arrangement for releasably attaching the various units of the invention lighting fixture; FIGURES 9 - 14 illustrate six different custom combinations available with the invention lighting fixture; FIGURE 15 is a fragmentary view of the invention lighting fixture showing a modified construction; FIGURES 16, 17, and 18 are detail views of the modified construction of FIGURE 10; and FIGURE 19 is a fragmentary detail view showing another modified construction. Detailed Description Of The Preferred Embodiment The invention lighting fixture includes a main body cylindrical portion 10; a central conical portion 12 flaring outwardly from the lower end of the main body portion; a lower cylindrical portion 14 extending downwardly from the lower end of central conical portion 14; a lower conical portion 16 flairing outwardly from the lower end of lower cylindrical portion 14; an upper conical portion 18 extending upwardly and inwardly from the upper end of main body portion 10; and an upper cylindrical portion 20 extending upwardly from the upper end of conical portion 18. Main body cylindrical portion 10, central conical portion 12, and lower cylindrical portion 14 are formed as an integral molded unit and together comprise a main housing section 22. Main housing section 22 may be formed in various ways but preferably is formed in- a plastic injection molding process in the desired finish color so that the finish color extends through the entire thickness of the section. Lower conical portion 16, upper conical portion 18, and upper cylindrical portion 20 are formed as separate units o r sections, preferably in an injection molding process and preferably of the same plastic material used to form the main body section 22. A partition 24 formed integrally with main body cylindrical portion 10 provides a mounting means for a lightbulb socket 26. Specifically, partition 24 includes a central opening 28 for receipt of a suitable fastener member 30 which mounts socket 26 within portion 10 in a position extending and opening downwardly generally on the central vertical axis of the lighting fixture. An electrical cord 32 extends upwardly from socket 26 through fastener 30 for connection with a suitable electrical outlet and a bulb 34 is conventionally secured within socket 26 and extends downwardly within main housing section 22. A circumferentially spaced series of holes 36 are provided in partition 24 for purposes of weight reduction and cooling. The upper end of main body cylindrical portion 10, above partition 24, is internally threaded at 38 for releasable securement of upper conical portion 18. A series of circumferentially spaced vertically extending ribs 40 are provided on the exterior upper surface of main body cylindrical portion 10; a series of circumferentially spaced relatively large diameter holes 42 are provided in main body cylindrical portion 10 below ribs 40 and in general vertical alignment with ribs 40; a series of circumferentially spaced small diameter holes 44 are provided in main body cylindrical portion 10 between ribs 40; a further series of small diameter holes 46 are provided in main body cylindrical portion 10 between large diameter holes 42; and a pair of diametrically opposed mounting holes 48 are provided in main body cylindrical portion 10 below holes 42 and 46. Central conical portion 12 includes a series of horizontal circumferentially extending steps or ridges 50, and a series of relatively large diameter openings 52 in staggered relationship to ribs 40 and openings 42. A series of circumferentially spaced vertical ribs 54 are provided on lower cylindrical portion 14 in general vertical alignment with ribs 40 and holes 42. The inner periphery of cylindrical portion 14 is threaded at 56 for threaded receipt of lower conical portion 16 and to provide reflection and defraction of the light rays emanating from bulb 34. Lower conical portion 16 comprises a reflector section and includes a series of horizontal, circumferentially extending steps or ridges 58 generally corresponding in size and spacing to steps 50 and a circumferentially spaced series of vertical ribs 60 in general vertical alignment with ribs 54, openings 42 and ribs 40. A rim portion 62 on the upper end of reflector section 16 is externally threaded to allow reflector section 16 to be screwed into lower cylindrical portion 14 of main housing section 22 with the threaded upward movement of section 16 into portion 14 delimited by engagement of the lower annular edge of portion 14 with the upper step 58 on reflector section 16. Upper conical portion 18 comprises a bezel section and includes a series of horizontal, circumferentially extending steps or ridges 64 generally corresponding in size and spacing to steps 50 and 58, and a circumferentially spaced series of large diameter openings 66. The lower end of bezel section 18 includes an externally threaded rim portion 68 for threaded coaction with the threads 38 on the upper end of main body cylindrical portion 10 with the extent of threaded movement of bezel section 18 into cylindrical portion 10 delimited by engagement of the lower annular edge surface of rim portion 68 with partition 24. Bezel section 18 also includes an externally threaded rim portion 70 on the upper end of the bezel section for threaded engagement with upper cylindrical portion 20. Upper cylindrical portion 20 comprises an upper housing section and includes a plurality of circumferentially spaced vertically extending ribs 72 and an internal partition 74 adjacent the lower end of the upper housing section having an oversized oval opening 76 for passage of light cord 32. Upper housing section 20 is internally threaded beneath partition 74 for threaded receipt of upper rim portion 70 on ' bezel section 18 with the extent of the threaded movement of section 18 into section 20 delimited by engagement of the upper annular edge surface of rim portion 70 with the lower surface of partition 74. The invention lighting fixture can be mounted on track lighting systems, independently, or in conjunction with various other lighting suspensions. The invention lighting system is illustrated in the drawings as adapted for use with an overhead track lighting system. Specifically, the illustrated invention lighting system includes a U-shaped bracket 78 having an oblong slide member 80 secured to its upper end for sliding engagement with the guide track of a track member 82. Member 80 is configured in known manner to allow it to be placed with its long dimension extending along and within the central slot opening in the track and then twisted to its illustrated configuration where it mounts the lighting fixture for sliding movement along the track. The lower ends of bracket 78 coact with bushings 84 for swiveling securement of the bracket to the inventon lighting fixture. Specifically, bushings 84 are internally threaded and are secured to diametrically opposed locations on main body cylindrical portion 10 by screws 86 passing through mounting holes 48. The lower ends of bracket 78 are in turn secured to the outer ends of bushings 84 by fasteners 88 passing through suitable holes in the lower ends of the bracket for threaded engagement with the outer portions of bushings 84. As illustrated in Figure 3, the invention lighting fixture may also be provided with a glass or globe 90 which may be removably fitted within the bottom opening of lower cylindrical portion 14 by a series of F-shaped fittings 92 suitably removably secured to the inner periphery of portion 14 by pins, screws or rivets 94. Similarly, a glass or globe 96 may be provided for removable placement within the open lower end of reflector section 16 by a series of F-shaped fittings 98 removably positioned within the open lower end of reflector section 16 by pins, screws or rivets 100. Glasses 90 and 96 may be composed and configured to either defuse, focus or concentrate the light emanating from blub 34 and may be colored with a transparent pigment to enable the lighting fixture to project a colored light even when using a standard white bulb. As an altervative to the threaded attachment means provided between the various sections in the embodiment of Figures 1-5, the attachment arrangement seen in Figures 6-8 may be employed. In the attachment arrangement of Figures 6-8, a pair of grooves 102 are provided in the external periphery of the internal member, for example rim 70 of bezel section 18, and a pair of coacting clips 104 are provided on the internal periphery of the external member, for example the lower end of the upper housing section 20. Each groove 102 includes a vertical entry portion 102a, a main body circumferentially extending portion 102b, and a detent or locking portion 102c. Entry portion 102a includes a V ramp surface 102d which, moving downwardly in entry portion 102a, becomes shallower and gradually fades away. Detent portion 102c includes an angled surface 102e, another angled surface 102f, and an undercut surface 102g connecting with angled surface 102e by a vertical shoulder 102h. Each clip 104 is formed of spring steel and includes a leading portion 104a, a trailing portion 104b forming a V angle with leading portion 104a, and an attachment portion 104c. Each clip 104 is forceably inserted into slot a 106 provided in the inner periphery of the external member to squeeze portions 104b and 104c together and securely mount the clip in the slot. In use, the external member is positioned over the internal member to align clips 104 with groove entry portion 102a; the external member is moved downwardly on the internal member to move clips 104 down V ramp surfaces 102d and resiliently flatten the clips and cause the clips to assume a depth matching the depth of main body groove portions 102b; and the external member is twisted relative to the internal member to cause clips 104 to guide, in their resiliently flattened configuration, along main body groove portions 102b and then move snappingly and resiliently into groove detent portions 102c where leading clip portions 104a rest against detent surfaces 102e and trailing clip portions 104b rest against detent surfaces 102f. The members are now snappingly secured together but may be separated by a firm reverse twisting force applied to either member. If it is desired to permanently lock the members together, leading clip portion 104a may be broken off prior to assembly of the members and trailing portions 104b will be trapped in detent or locking groove portions 102c by shoulders 102h. The members are thus locked together and may only be separated by destructive rendering of the members. The invention lighting fixture provides a multitude of custom lighting combinations and a multitude of mounting options. Specifically, and as seen in Figures 9-14, main housing section 22 may be used alone to provide the combination seen in Figure 9; main housing section 22 may be used in combination with reflector section 16 to provide the configuration seen in Figure 10; main housing section 22 may be used in combination with bezel section 18 to provide the configuration seen in Figure 11; main housing section 22 may be used in combination with bezel section 18 and reflector section 16 to provide the combination seen in Figure 12; main housing section 22 may be used in combination with bezel section 18 and upper housing section 20 to provide the combination seen in Figure 13; and main housing section 22 may be used in combination with bezel section 18, upper housing section 20, and reflector section 16 to provide the configuration seen in Figure 14. As further possible combinations, glass 90 may be used in the combinations of Figures 9, 11 or 13 and glass 96 may be used in the combinations of Figures 10, 12 or 14. Although the invention lighting assembly is especially suitable for use as a stage light or spotlight, it is usable in one or more of its many combinations in almost any situation where lighting is required. It offers an almost unlimited versatility of uses, sizes, colors, functions and appearances and yet is reasonably economical to manufacture. The holes in the various sections, in addition to lightening the overall assembly, allow ventilation for heat from the lightbulb to escape. The holes also impart a sparkling star-like appearance to the fixture by allowing rays from bulb 34 to emanate from the fixture at various angles, in various locations, and in light bundles of varying thickness. If reflector or floodlight type bulbs are used in socket 26, the holes create a soft glowing effect, rather than a sparkling star-like effect, since reflector or flood bulbs typically block all light at the sides of the bulb and the light emerges as a concentrated, directed beam at the head of the bulb. Irrespective of the type of bulb employed, the holes also provide pleasing aesthetic continuity by virture of the fact that they are repeated in the various components of the unit in a symmetrical manner. The vertical bars or ridges provide aesthetic continuity between the various components and also strengthen the overall light assembly by providing reinforcing ridges. The stepped tier design provides a large surface area for heat dissemination while also providing a truss¬ like, extremely strong overall construction. The horizontally extended ridges in sections 18, 12 and 16 also strengthen the structure and provide pleasing aesthetic continuity between the various components. Upper housing section 20, in addition to providing a pleasing upward aesthetic continuity for the var i ous appearance aspects of the lighting assembly, provides a housing for receiving transformers or transducers in situations where it is desired to use sophisticated bulbs requiring such accessory support equipment. When housing 20 is used to house such transformers or transducers, over sized oval hole 76 in partition 74 allows ready electrical connection between such transducers and transformers and the sophisticated bulb supported on partition 24. Upper housing section 20 thus has both an aesthetic and a functional aspect. The construction of the invention lighting assembly lends itself to overall chroming, white and black injection molding, chrome with black accenting, and white with black accenting. The invention lighting assembly can be manufactured and sold in the complete package illustrated or in any one of a number of various subcombinations of the complete package. As an alternative to the integrally molded ribs 72, 40, 54, and 60, separately molded ribs 110, 112, 114, 116, and 118 may be provided, as seen in Figures 15-18, for respective coaction with portions 20, 10, 14, and 16.. The separately molded ribs are formed of a clear plastic and may be of any desired color. Each rib includes a main body portion 110a, 112a, 114a, 116a, and 118a and at least one integral mounting pin portion 110b, 112b, 114b, 116b, and 118b for receipt in a suitable hole in the associated portion of the lighting fixture. Ribs 110 also include an integral semi- flexible fiber optics rod 110c which extends downwardly within the lighting fixture through partitions 74 and 24 to a multi-faceted lower end llOd, best seen in Figure 18, disposed in proximity to light bulb 34. Ribs 112, 116 also include an integral central rod 112c, 116c passing through a hole in fixture portion 10,16 and having a multi-beveled inner end defining a plurality of facets or aspects 112d, 116d. Each rib 114 includes a pair of upper and lower integral rods 114c passing through holes in fixture portion 14 and defining facets 114d at their inner end. The mounting pin portion 118b of each rib 118 also constitutes a rod portion and defines facets 118c at its inner end. As seen in Figure 17, each rib main body portion is preferably longitudinally beveled to provide a plurality of longitudinally extending facets 120. When the separately molded, clear plastic ribs of Figures 15-18 are employed, light from bulb 34 is transmitted to ribs 110 through semi-flexible rods 10c, through rods 112d to ribs 112, through rods 114c to ribs 114, through rods 116c to ribs 116, and through rods 118b to ribs 118. The facets llOd, 112d, 114d, and 118c maximize the light gathering efficacy of the rods in each case and the bevels 120 on the main body portions of the rods maximize the light emanating effect.. The lighted ribs 110, 112, 114, 116 and 118 will be seen to augment the sparkling star-like appearance of the lighting fixture. As an alternative mounting system, and as seen in Figure 19, the separately molded ribs 122 may have a circular cross section and may be cemented into olded- in arcuate, vertically extending slots 124 in the associated lighting fixture portion with the inner arcuate surfaces 122a of the ribs projecting into the interior of the associated lighting fixture portion to gather light from bulb 34 and the outer arcuate surfaces 122b of the ribs protruding from the exterior surface of the associated lighting fixture portion to provide sparkle for the fixture. The lighted ribs 110-118, or 122, will be seen to augment the sparkling star-like appearance of the lighting fixture. The invention lighting fixture may of course be utilized with the molded-in ribs of Figures 1- 12 employed in certain portions of the lighting fixture and the separately molded lighted ribs of Figures 15-19 employed in the other portions of the lighting fixture. Whereas a preferred embodiment of the invention has been illustrated and described in detail, it will be apparent that various changes may be made in the disclosed embodiment without departing from the scope or spirit of the invention.

Claims: Claims 1. A stepped lighting fixture comprising: A. a hollow main body generally cylindrical portion; B. a hollow central conical portion flaring outwardly from the lower end of said main body portion; C. a lower hollow cylindrical portion, having a diameter generally corresponding to the lower end diameter of said central conical portion, extending downwardly from the lower end of said central conical portion; and D. means within said main body portion for mounting a light bulb socket therewithin in a position extending and opening downwardly generally on the central vertical axis of said main body portion. 2. A lighting fixture according to Claim 1 and further including: E. a lower hollow conical portion flaring outwardly from the lower end of said lower cylindrical portion. 3. A lighting fixture according to Claim 2 and further including: F. an upper hollow conical portion extending upwardly and inwardly from the upper end of said main body portion. 4. A lighting fixture according to Claim 3 and further including: G. an upper hollow cylindrical portion, having a diameter generally corresponding to the upper end diameter of said upper conical portion, extending upwardly from the upper end of said upper conical portion. 5. A lighting fixture according to Claim 4 wherein: H. said main body portion, said hollow central conical portion, and said lower cylindrical portion are formed as an integrally molded unit; I. said lower conical portion, said upper conical portion, and said upper cylindrical portion are formed as separate units; and J. releasable coacting securement means are provided at the interface of the various units to readily but releasably secure these units together. 6. A lighting fixture according to Claim 5 wherein said coacting securement means comprises thread means. 7. A lighting fixture according to Claim 5 wherein said coacting securement means means comprises: K. a circumferentially extending groove in the external periphery of one unit; and L. a resilient clip carried on the internal periphery of a related unit and sized for coaction with said groove. 8. A lighting fixture according to Claim 7 wherein: M. said groove includes 1. a main body circumferentially extending portion, 2. a vertical entry portion opening at its upper end at the upper annular surface of said one unit and communicating at its lower end with one end of said main body groove portion and including a V ramp surface which, moving downwardly in said entry portion, becomes shallower and fades away, and 3. a detent portion at the other end of said main body groove portion; and N. said clip defines a resilient V configuration which rides downwardly on said V ramp surface as the units are moved vertically relative to one another to resiliently flatten the clip, whereafter the units may be twisted relative to one another to move the clip along said main body groove portion into the detent portion to releasably secure the units together. 9. A lighting fixture according to Claim 5 and further including: K. a mounting bracket having a U-shaped portion sized to embrace said main body portion; and L. means pivotally securing the opposite ends of said U-shaped portion to diametrically opposed locations on said main body portion to swivelly mount said lighting fixture within said mounting bracket. 10. A lighting fixture according to Claim 9 and further including: M. means on the upper end of said U-shaped bracket portion adapted to be slidably received in an overhead track, whereby said lighting fixture may be used with a track lighting system. 11. A lighting fixture according to Claim 3 wherein: G. at least two of said portions are provided with a series of circumferentially spaced vertically extending stiffening ribs on the outer surface thereof to provide overall strength to said lighting fixture. 12. A lighting fixture according to Claim 11 wherein: H. the series of ribs on said at least two portions are respectively vertically aligned to provide aesthetic vertical continuity. 13. A lighting fixture according to Claim 12 wherein: I. a series of vertical stiffening ribs are provided on said main body portion, said lower cylindrical portion, and said conical portion. 14. A lighting fixture according to Claim 3 wherein: G. at least two of said portions are provided with a series of circumferentially spaced holes to lighten the overall structure, allow cooling of the light bulb, and provide a star effect to the fixture. 15. A lighting fixture according to Claim 14 wherein: H. a series of circumferentially spaced holes are provided in said main body portion, said central conical portion, and said upper conical portion. 16. A lighting fixture kit comprising: A. an integral main housing section including: 1. a hollow cylindrical main body portion, 2. a hollow central conical portion flaring outwardly from the lower end of said main body portion, and 3. a hollow lower cylindrical portion extending downwardly from the lower end of said conical portion; B. a downwardly and outwardly flaring conical reflector section adapted for securement to the lower end of said lower cylindrical portion; C. an upwardly and inwardly flaring conical bezel section adapted for securement to the upper end of the main body portion; D. an upper hollow cylindrical housing section adapted for securement to the upper end of said bezel section; and E. releasable coacting attachment means on the lower end of said lower cylindrical portion and the upper end of said reflector section, on the upper end of said main body portion and the lower end of said bezel section, and on the upper end of said bezel section and the lower end of said upper housing section, whereby said sections may be selectively combined in a multitude of combinations to selectively produce a multitude of functional and appearance options. 17. A kit according to Claim 16 wherein said releasable coacting attachment comprise coacting threaded means . on the various sections. 18. A kit according to Claim 16 wherein said releasable coacting attachment on the various sections comprise: F. a circumferentially extending groove in the external periphery of one section; and G. a resilient clip carried on the internal periphery of the related section and sized for coaction with said groove. 19. A kit according to Claim 18 wherein: H. each said groove includes 1. a main body circumferentially extending portion, 2. a vertical entry portion opening at its upper end at the upper annular surface of said one section and communicating at its lower end with one end of said main body groove portion and including a V ramp surface which, moving downwardly in said entry portion, becomes shallower and fades away, and 3. a detent portion at the other end of said main body groove portion; and I. each said clip defines a resilient V configuration which rides downwardly on said V ramp surface as the sections are moved vertically relative to one another to resiliently flatten the clip whereafter the sections may be twisted relative to one another to move the clip along the main body groove portion and into the detent portion. 20. A kit according to Claim 17 wherein said kit further includes: F. a first globe adapted to be fitted within the lower end of said lower cylindrical portion; G. a second globe adapted to be fitted within the lower end of said reflector section; and H. custom fastener means for releasably securing said globes respectively in the lower end of said lower cylindrical portion and in the lower end of said reflector section, whereby to provide a further variety of functional and appearance options. 21. A lighting fixture according to Claim 1 wherein said fixture further comprises: E. a plurality of elongated ribs formed of a generally transparent material; F. means for mounting said ribs on the exterior surface of at least one of said portions in circumferentially spaced array about such exterior surface; and G. means for conducting light from the interior of said fixture to said ribs so that said ribs are lit in response to lighting of a bulb positioned in said socket. 22. A lighting fixture according to Claim 21 wherein: H. said conducting means comprises at least one rod formed integrally with each rib and extending inwardly therefrom through a hole in the associated lighting fixture portion to position the inner end of the rod within the hollow interior of the lighting fixture. 23. A lighting fixture according to Claim 22 wherein: I. said rod comprises a semi-flexible fibre optic rod extending along a flexible path within said fixture to position its inner end adjacent said bulb. 24. A lighting fixture according to Claim 21 wherein: H. said conducting means comprises a plurality of elongated slots in said lighting fixture portion arranged to receive a respective rib therein with an inner portion of the rod exposed to the interior of the lighting fixture so as to receive light from said bulb and an outer portion of the rod positioned adjacent the exterior surface of said lighting fixture portion so as to light up that portion. 25. A stepped lighting fixture comprising: A. at least one housing section having a portion presenting a cylindrical outer surface; B. at least two housing sections each having a portion presenting a conical outer surface; C. means in one of said sections for mounting a lightbulb therewithin; and D. means releasably securing said sections together in a vertically stacked array with all of said outer surface concentric with the central vertical axis of the stacked array. 26. A lighting fixture according to Claim 25 wherein: E. said outer surfaces gradually decrease in diameter moving upwardly on the vertically stacked array. 27. A lighting fixture according to Claim 25 wherein: E. said fixture includes two sections having a portion presenting a cylindrical outer surface; and F. said sections are stacked so that they present alternately, moving axially on the stack from section to section, a cylindrical section and a conical section. 28. A lighting fixture according to Claim 27 wherein: G. said stack sections are configured and arranged to present successive conical and cylindrical surfaces throughout the entire height of the stacked array. 29. A lighting fixture according to Claim 28 wherein: H. at least one of said sections includes a portion presenting a conical outer surface and a contiguous portion presenting a cylindrical outer surface. 30. A lighting fixture according to Claim 28 wherein: H. at least one of said sections includes a first portion presenting a cylindrical outer surface, a second portion contiguous to said first portion presenting a conical outer surface, and a third portion contiguous to said second portion presenting a cylindrical outer surface.

Inventors: MICHAEL ANTHONY J, MICHAEL, ANTHONY, J.
Applicants: MICHAEL ANTHONY J, MICHAEL, ANTHONY, J.
Application year: 1985
Main classification: F21V7
IPC codes: F21S8, F21V17