US2221954A - Lighting fixture - Google Patents

Description

Nov. 19, 1940. L SCHEPMQES 2,221,954

LIGHTING FIXTURE Filed Aug. 25, 1938 4 Sheets-Sheet l -E I 5;.1 o

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LIGHTING FIXTURE Filed Aug. 25, i938 4 sheets-sheet 2 INVENTOR //vaszf y SCHEPMOES k4x7 v ATTORNEYS Nov. 19, 1940. L. scHEPMoEs LIGHTING FIXTURE Filed Aug. 2s', 1958 4 Sheets-Sheet 3 LVLVLLV'L?` INVENTO MMU-Ey Sc/ff P/foES ATTORNEYS BY M0, MLM' Nov. 19, 1940. L. scHEPMOES LIGHTING FIXTURE Filed Aug. 23, 1938 4 Sheets-Sheet 4 s m M my E p, w w R5 f E maw o m MQ m MM m h m u m a I I I|||| I N NQ N ,Umm m v l @s m |l-||- %Q\\ ,Q\\ m.Q\ Q @Q N Nw. J.

WS ms retenes Nev. 19,1940

PATENT oFFlc'I-z uGnTniiG FIXTURE Lindsley Schepnioes, New Haven, Conn., assigner to The -Safety Car Heating & Lighting -Company, a, corporation of New Jersey `Application Aumt'zs. 193s. serial No; 226,227

12 Claims.

This invention relates tp lighting xtures.

One of the objects of -this invention is toprovide a lighting fixture which is simple andV sturdy in construction. Another object is to provide a fixture of'the above character which may be easily disassembled to replace worn parts. another object is to provide a fixture of the above character the various parts of which may` be readily and securely fastened to a ceiling or a wall. Another object is to provide a xture of the above character which will be yneat and attractive in appearance but sturdy in construction to withstand hard usage. Another object is to provide a fixture of the above character which may be easily assembled. Other objects will be.

in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts, as willbe exemplified in the structure to be hereinafter described and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings in which are shown several of the possible embodiments of the invention.

Figure 1 is a perspective view of the preferred embodiment of my lighting fixture secured to a ceiling;

Figure 2 is a bottom plan view of the fixture shown in Figure 1, certain parts thereof being broken away;

Figure 3 is a perspective view of another embodiment of my -lighting fixture;

Figure 4 is an enlarged bottom plan view of the fixture shown in Figure 3;

Figure 5 is anenlarged vertical section taken along line 5--5 of Figure 4;

Figure 6 is a perspective view of another embodiment of my lighting xture;

Figure 7 is an enlarged bottom plan View of the fixture shown in Figure 6, certain parts thereof being broken away;

Figure 8 is an enlarged vertical section taken along`the line 8-8 of Figure 7; i

Figure 9 is a fragmentary vertical section taken along the line 9-9 of Figure 2;

Figure 10 shows a circuit for my fixture; and

Figure 11 is a fragmentary perspective view of one end of a lamp and the receptacle to which it is attached.

Similar reference characters refer to similar parts throughout the several views of the drawings.

(Cl. 24U-78) As conducive to a clearer understanding of the various novel features of the invention, it might be here pointed vout that the lighting fixtures shown are preferably constructed to use a cylindrical or tubular uorescent lamp. In the past 5 diiculty has been`experienced in using this type. of lamp in a lighting fixture to advantage with a shade structure.` In such past structures when the lamp wears out, it cannot be replaced without disassembly of the entire xture. Furthermore when a number of these tubes are used in series along a ceiling, for example in a railroad car, it is very difficult to remove one tube from the series without disassembly of the entire structure. One of the various objects of this invention is to provide a practical and eicient lighting fixture for overcoming the above-mentioned difficulties. y

Referring now to Figures 1 and 2 a reflector, oval-shaped in cross section, generally indicated at I Il, is secured in convenient lengths to ceiling Il in any suitable manner, such as by a series of bolts I2 preferably passing through co1- lars I3. Bolts I2 and collars I3 are oifset from the vertical centerline of Yreiiector I0, as best shown in Figure 1, and collars I3 are disposed between the highest portion of rei-lector I0 and ceiling II to hold this portion of the reflector y rigidly spaced from the ceiling when the bolts are tightened. f i 30 Moun'ted adjacent to the center portion of reiiector III (Figure 2) 'is a series of electric receptacles, generally indicated at I5a, I5b, I 5c, |501, I5el5f, Ilia, IGb, I6c, Id, I6e, and IIif secured to ,reector I0 'in any suitable manner, as by Y brackets I1 and I8 (Figure 1). These receptacles have recesses formed therein in which tube lamps I'9a, I9b, I9c, 20a, 20h', and 20c, may be detach. ably secured. As the mounting of all lamps 'is similar the description herein will be limited to" the mounting of lamp 20a Iand the construction of receptacle Isa.

"Referring now to Figure 11, lamp 20u carries metal ring 94, and a pair of prongs extend from thisring and are insulated from.. one another. Receptacle Ilia preferably comprises a base .90 having a depending portion 9I with a recess 95 formed in the lower portionthereof. A pair oi spaced bosses 91 and 98 are positioned in the center of recess 95 and spaced from the sides thereof to permit a pair of resilient arms 99 and |00 to-.be mounted in the recess. These arms, which are connected' to the electrical circuit To be hereinafter described, are angular in shape and resiliently press against the upper and lower vin recesses |0| and |02.

portions of the bosses formdng a pair of recesses |0| and |02 on opposite sides thereof. The slot between bosses 91 and 498 registers with a slot |03 cut in the lower edge of depending portion 9|.

To install lamp 20a in receptacle |611, prongs S2 and 93 are slid upwardly through slot |03 until bosses 91 and 98 lie between the prongs. The tube 20a is twisted and prongs 92 and 93 force the resilient arms apart, and after the tube has been twisted through 90 degrees, the prongs rest Thus, tube 20h (Figure 9) may be secured to receptacles ISb and |6c as described above with'respect to tube 20a. At this time the prongs on the ends of the lamp contact the resilient -arms in receptacles |61) and |6c. As the arms in receptacle |6b are connected to conduits |04 and |05 and as the resilient arms in receptacle |60 are connected to conduits |06 and |01, the lamp at this time can be supplied with current through these arms and the prongs formed on the ends of the lamps.

Referring now to Figure 2, lamps |9a, |91), |9c, and 20c may be mounted on their receptacles, the depending portions of which extend through the reflector I0 (Figures 1, 2, and 9). Thus, it will be seen that two series of lamps are detachably mounted adjacent reflector |0 and that any lamp in either series may be removed or replaced without disturbing the other lamps.

Referring now to Figures 1 and 2, a partition 26 is secured along the center of reflector |0 in any suitable manner, for example by welding. The sides of this partition preferably have a reecting surface and have a series of opposed slots 29 (see Figure 2). formed therein for purposes to be disclosed more fully hereinafter.

The louver structure, generally indicated at 2|, preferably comprises a plurality of tunnel-shaped sections 21 (Figure 1) made of a light translucent material, such as a translucent plastic. A series of sections form a unit of the louver structure for one lamp, as best shown in Figure 2, and abutting sides of the sections in each unit are preferably secured together by any suitable adhesive. Aligned holes are formed in the upper portions of the walls of each section having a diameter slightly greater than that of the lamp, and the lamps extend therethrough so that each lamp supports a series of louvers forming a unit secured thereto.

Adjacent receptacles, such as receptacles |6a and |6b (Figure 9) are spaced to permit the end wall of each adjacent unit to pass therebetween and be in abutting relationship when the fixture is assembled. When the lamps with their louver units are attached to the receptacles, the open sides of the tunnel-shaped sections 21 (Figures 1 and 2) abut against partition 26 and the edges of the open sides t into slots 29. As the louvers are made of a light translucent material, the weight of each unit is very small and easily supported by the lamps.

The construction on both sides of the partition is similar, and thus each of lamps |9a, |911, |90, 20a, 20h, and 20c (see Figure 2) form a unit with the unit louvers; such units will hereinafter be referred to as light assemblies. Thus, each light assembly is detachably mounted betweenadjacent receptacles, the mounting of the prongs of each assembly serving not only to support their assembly but to afford an electrical connection therefor as hereinbefore described with respect to Figure 11.

Each lamp is preferably provided with a thermal starting unit. such as the thermal unit, generally indicated at |04 (Figure 9), which supplies lamp 20h with current as will be disclosed more clearly hereinafter. This unit is secured to reflector I0 in any suitable manner, and is preferably positioned between receptacles |61) and 5 |60 and is electrically connected thereto.

It will now appear that each assembly comprising, for example lamp 201) and tunnel sections 21 (Figure 9), is unitary in construction, and, as pointed out above, is positionable and detachable into and from operating position as a unit. Furthermore, all receptacles, such as receptacle |6b, and all of thermal units, such as unit |04, and all connecting wiring are mounted on reflector |0. Preferably the wiring for the individual re- 15 ceptacles and thermal starting units which serve each of the lamp assemblies is connected to a common electric conduit (not shown) to facilitate the installation of the fixture. Thus, subsequent to the assembly of thermal starting units 20 and the receptacles on reflector I0, the reflector and the several parts attached thereto may be installed on the. ceiling of a railroad car, for example, as a unit in proper position for easy and rapid installation of the lamp assemblies.

When the xture is assembled (Figure 1), light rays may pass freely upwardly and'downwardly through the ends of the tunnel-shaped sections. The light passing upwardly strikes reflector I0 and is dispersed about the upper portion of the car. By reason of the tunnel-shaped conformation of the sections 21 direct emanation of light rays is possible in substantially vertical directions only, all lateral rays of light passing thru and being diffused by closed sides of sections 21, which, as hereinbefore noted, are translucent.

Some of the light from the lamp will strike the sides of partition 26and be reflected to slant downwardly in a predetermined direction for dvergence of illumination to reading planes, in a l., railroad car, for example. Furthermore, as the louver structure is made of a translucent material its sides are illuminated giving the fixture an attractive appearance when lighted.

Referring now to Figures 3, 4, and 5 in which is shown another embodiment of my invention,

a louver assembly, generally indicated at 30, depends from a base, generally indicated at 3|.I Base 3| (Figure 5) is secured to ceiling 32 in any suitable manner and preferably includes a supporting member 33 and a depending member 34. Supporting member 33 has a flange 35 ex'- tending downwardly and depending member 34 has a flange 36 extending upwardly to t over flange35 to which it is attached by bolts 31. 55 A pair -of receptacles 4| and 42 (Figure 4) are preferably mounted adjacent the opposite ends of base 3| by brackets 39 (Figure 5), or the like. 'I'hese receptacles are the same as the receptacles |6b and |.6c (Figure 9) and accordingly include depending projections 4|a and 42a which extend thru depending member 34. A lamp 40 (Figure 4) is detachably connected to receptacles 4| and 42 as described above with respect to lamp 2lb (Figure 9). f i

The louver assembly 30 (Figures 3 and 4) is preferably vformed of a light translucent material and includes a tubular section 43 and a plurality of crescent-shaped sections, generally indicated at 15, extending out longitudinally in 70 both directions from section 43. The crescentshaped sections 44 and 45 are mounted with their open sides abutting section 43, thus being positioned on the opposite sides thereof. The other crescent-shaped sections are `fitted one 75' ,'sure member 5| serves 4tchold suitable wiring ior the lamps, thethermal starting unit, and a` back of the other in semi-telescoped fashion.' as will clearly be seen in Figures 3 and-4, lAll of sections 15 are preferably connected together at` .points of engagement by assembly 30 and a partition plate 41 (Figures 3, the longi- 4, and 5) is mounted transversely of tudinal axis of the xture and substantially at the longitudinal center thereof. Partition plate 41, which is. preferably an integral part of as-l sembly 30, has a hole 48 formed .therein to permit installation about lamp 40. Channel. 46 serves to prevent light from leaking past the upper edges of the louver assembly and partition plate 41 limitsthelongitudinal dispersion of the light rays from the central section of the fixture. The spacing of the louvers in assembly 30 and their relation to lamp 40 provides a shield against normal vision of the lamp.

This fixture is provided with a thermal starting unit and electrical connections similar to those described with respect to Figure 9. Thus, a fixture has been provided in which the neat and attractive louver assembly may beeasily and quickly installed or removed from the base. Furthermore, the structurel-may be easily manufactured from inexpensive ymaterials and yet be able to withstand hard usage.

Another embodiment ,of my invention is shown in Figures 6, '7, and 8, wherein the xture is particularly suited for mounting on a wall. Thus this iixture includes a reflectongenerally indicated at 48, which has lower section 49 abutting against wall 52 (Figure 8) and secured thereto as by a screw 16. Reector 48 curves outwardly from section 49 to vertical ange portion 10. As best seen in Figure '1, this curved portion of the reector extends outwardly at spacedintervals to form a series of projections 50a, 50h, and 50c. The open top of the reiiector is covered by a closure member 5|, extending to ange 10 and secured to wall 52 in any suitable manner, for example by blocks 53 and screws 54 (Figure 8).

'Ihe enclosure formed by reflector. and closeries of receptacles, one of which is shown at 55 (Figure 8). These receptacles are mounted in the projections 50a, 50h, and 50c (Figure 7) of the reector and are held against flange 10 (Figure 8) in any suitable manner such as by brackets 56 (Figure 8) Lamps 51 and 58 are detachably secured to these receptacles in a manner i similar to the mounting 0f1amp 2lb (Figure 9).

The louver assembly comprises a seriesV of tunnel-shaped sections made of a light translucent material similar to that described above. Tubular,lamp 58 carries louver assemblies, generally indicated at 19 (Figure '1) preferably securedto'- gether with adhesive and mounted on the lamp 'in a manner'similar to the mounting of the unit louvers shown in Figure 1. The open sides Vof the louvers t against reflector`48, the edges thereof being curved to conformto the curve thereof (see Figure 8). Thus louver assemblies 19 f are detachably mounted adjacent reflector 48'.

Preferably a casing, generally indicated at 1|,

comprising a front section 59 and, end sections described above is shown.

ments of the lamp.

'constructed\ to furnish an light, while at the same time the louver struc` successfully accomplished.

60 and 0|. e Deslrably this casing` comprises a series of spaced wooden strips 62 (Figures 6 and 8) with translucent strips 68 disposed therebetween for decorative purposes. The casing being open at the top and bottom, light rays from lamps 58 lmay pass upwardly around the outer edge4 of the reflector to illuminate the ceiling, and downwardly from the lamps and reflector 48.

In Figure 10 the circuit for the lighting kxtures conductors |24 and |08 which are connected to a source of power in a railroad car or' house in which the fixture is togbe mounted'. In this circuit the current ilow's from conductor |08 .through a reactor |09, a heating coil ||0 to a lament through conductor |01; The other side of this lament is connected by a conductor |06 to a thermal switch ||2, normally closed, which includes a condenser H3. The other side of switch ||2 is connected to iilanient I |4 through conductor |05. The other contact of filament ||4 is connected to conductor |24 and by this conductor to the other side of the power line (not shown). In operation the current ows through reactor 909, heating coil H0, lament thermal switch ||2 and filament ||4. The passage of. current through this circuit heats heating. coil I0, which, after a certain period, causes thermal switch I2 to open. The passage of the current through the iilaments has produced the necessary heating of these filaments, and when thermal switch ||2 opens, the current owing through the reactor |09 produces high voltage between the filawhich produces a discharge from one iilament to the other causing the lamp to glow. The o penflng of switch I2 stops the circulating current through the lament and when rthe lamp is glowing, the circuit is from conductor |08 to reactor |09, through heating throughvconductor |01 the lamp to lament 'rent In many cases the xtures shown in Figures 1, 3 and 6 are large enough so that installation of the elongated light bulb may readily be eiected manually, i. e., the louver late the light bulb. If, however, it is desired to install smaller sized fixtures which would be too small to permit manual manipulation of the light bulb, the light' bulb may be installed by suitable tools.

' Thus, in these fixtures if any lamp in an as semblyl burns out the lamp may be easily and quickly replaced without disturbing the connection and operation of the other units in the series. Furthermore, the lighting iixture 4shown presents a neat and attractive appearance and;4v is adequate s upplyj of tures presenta shield against normal vision of the lamp. Thus, the Aseveral objects hereinabove referred to, as well as y others, have beexr As many possible embodiments may be made ofthe/above invention, and as many changes might be made iii the'lembo l i ents above set forth, it is t6 be understood that alL'matter hereinbefore set forth or shown in the accompanying ts about the louver assemblies and reflector,

drawingsis tov/be interpreted as illustrative and nct'inalimitedV sense..

This circuit includes 10 structure is such that 'T50 )l the' hands'may be inserted therein to manipuf coi I claim;

1. In a lighting fixture, in combination, means forming a horizontal support, an elongated electric lightl tube, means for detachably securing the ends of said tube to said support so that said tube l is supported in a horizontal plane, and a plurality of substantially U-shaped translucent plastic members, each of said members having upper, lower and side open ends and adapted to be mounted with their upper open ends abutting said support, whereby said ends are closed and with their lower ends opening downwardly of said support, one leg of each of said members being fused to one leg of the adjacent member so that said members are secured together as a self-sustaining unit, said unit having a plurality of aligned holes near the upper portion thereof to slidably and freely receive said tube and be suspended thereon so that said tube and unit comprise an assemly detachably mounted on the support and which when said tube is energized directs light substantially vertically of said support downwardly through the open ends of said members and duluses light laterally thereof through the sides of said members whereby glare laterally and longitudinally of said assembly is substantially eliminated.

2. In a lighting fixture adapted to be secured to a wall, in combination, a light emitting tube, means for detachably mounting said tube on said wall, and a plurality of substantially U-shaped translucent members having upper, lower and' side open ends and adapted to be mounted with their side open ends abutting said wall whereby said ends are closed and with their upper and lower ends opening upwardly and downwardly respectively, one leg of each of said members being connected to one leg of the adjacent member so that said members are secured together as a selfsustaining unit, said unit having a plurality of aligned holes near the upper portion thereof to slidably and freely receive said tube and be suspended thereon so that said tube and unit comprise an assembly detachably mounted on said wall and which when said tube is energized directs light substantially vertically upwardly and downwardly through the upper and lower ends of said members and diiuses light laterally through the sides of said members whereby glare laterallyand longitudinally of said assembly is substantially eliminated.

3. In a lighting fixture adapted to be secured to a wall, in combination, a reflector secured to said wall, a light emitting tube, means detachably mounting said tube on said wall adjacent said reflector, and a plurality of substantially U-shaped `translucent members having upper, lower and side open ends and adapted to be mounted with their side ends abutting said reflector whereby said ends are closed and with their lower ends opening downwardly of said support, one leg of each of said members being connected to one leg of the adjacent members so that said members are secured together as a selfsustaining unit, said unit having a plurality of aligned holes formed therein to slidably and freely receive said tube and be suspended thereon so that said tube and unit comprise an assembly detachably mounted with respect to said reector and which when said tube is energized di.. rects light substantially vertically of said reflector downwardly through the open ends of said members and diffuses light laterally thereof through the sides of said members whereby glare laterally and longitudinally of said assembly is substantially eliminated.

4. In a lighting fixture adapted to be secured to a wall, in combination, a light emitting tube, means for detachably mounting said tube on said wall, a plurality of substantially U-shaped translucent members having upper, lower and side open ends and adapted to be mounted with their side open ends abutting said wall whereby said ends are closed and with their upper and lower ends opening upwardly and downwardly respectively, one leg of each of said members being connected to one leg of the adjacent member so that said members are secured together as a self-sustaining unit, said unit having a plurality of aligned holes near the upper portion thereof to slidably and freely receive said tube and be suspended thereon so that said tube and unit comprise an assembly detachably mounted on said wall and which when said tube is energized directs light substantially vertically upwardly and downwardly through the upper and lower ends of said members and diffuses light laterally through the sides -oi said members whereby glare laterally and longitudinally of said assembly is substantially eliminated, and a casing secured to said wall and covering the upper portion of said unit to limit lateral light diffusion thereof.

5. In a lighting xture adapted to be mounted on a ceiling, in combination, a reflector secured to said ceiling, a pair of light emitting tubes, means for detachably mounting said tubes on said reflector, means forming a partition connected to said reflector and extending downwardly therefrombetween said tubes, and a louver structure associated with each of said tubes and disposed o n opposite sides of said partition, each of said louver structures including a plurality of substantially U-shaped translucent members connected together as a self-sustaining unit, each of said units having a plurality'of aligned holes formed therein to slidably and freely receive said tubes and be suspended thereon so that said tubes and units comprise assemblies detachably connected to said reflector, said members having open lower ends opening Vdownwardly of said reflector and open sides abutting said partition, whereby light rays emanating from said tubes are reflected downwardly through the open ends of said members and are diffused laterally through those sides of said members spaced from said partition whereby glare laterally and longitudinally of said xture is substantially eliminated.

6. In a lighting fixture adapted to be mounted on a ceiling, in combination, a reiiector secured to said ceiling, a pair of light emitting tubes, means for detachably mounting said tubes on said reector, means forming a partition connected to said reector and extending downwardly therefrom between said tubes, and a louver structure associated with each of said tubes and disposed on opposite sides of said partition, each of said louver structures comprising a plurality of .substantially U-shaped translucent members having upper, lower and side open ends and adapted to be mounted with their upper open ends abutting said reector, whereby said ends are closed and with their lower ends opening downwardly of said reector, one leg of each of said members being connected to one leg of the adjacent member so that said members are secured together to cause said louver structures to be self-sustaining units, each of said units having a plurality of aligned holes formed therein to slidably. and freely receive said tubes and be suspended thereon so that said tubes and units comprise assemblies detachably connected to said reilector and which when said tubes are energized direct light substantially vertically of said reflector downwardly through the open ends of said members and diiuse light laterally thereof through the sides of said members whereby glare laterally and longitudinally of said assemblies is substantially eliminated.

7. In a lighting fixture adapted to be attached to a ceiling, in combination, means forming a support for said lighting xture, a light-emitting tube detachably mounted on said support, and a louver structure mounted on said tube, said struc'- ture comprising a center section substantially circular in cross-section, and a plurality of other sections crescent-shaped in cross section mounted on opposite sides of said center section in alignment with each other, the edges of the opening in each crescent-shaped section abutting against the section adjacent thereto.

8. In a lighting fixture adapted to be attached to a ceiling, in combination, means forming a support for said lighting fixture, a. light-,emitting tube detachably secured to said support, a louver structure formed of a translucent material mounted on said tube, said structure comprising a center section substantially circular in cross section and a plurality of other sections crescentshaped in cross section in alignment with, each other, the edges of the opening in each crescentshaped section abutting against the section adjacent thereto, and a partition member mounted on said tube positioned in. the center of said center sectionand extending thereacross transversely to said lighting fixture.

9. In a lighting fixture adapted to be attached yto a ceiling, in combination, means forming a support for said lighting fixture, a light-emitting tube detachably associatedl with said support, a. louver structure associated with said tube, said structure comprising a center section substantially circular in cross section' and a plurality of other sections crescent-shaped in cross section mounted on opposite sides of said center section in alignment with each other, and a channell formed in said support into which the upper edges of said sections t, whereby light is prevented from escaping from said fixture around the upper edges of said sections.

10. A lighting xture adapted to be secured to a ceiling or the like comprising, in combination," a supporting member,` a channel-shaped meme,

ber secured to said supporting member, said4 members forming an enclosure adapted to house the circuit elements of the lighting xture, a pair of bulb sockets secured to and depending from said channel member and substantially spaced from one another, an elongated electric light bulb adapted to be detachably mounted in said sockets, a tubular light transmitting'and reflecting element associated with said bulb and said channel member substantially centrally thereof, and a plurality of substantially U-shaped light transmitting elements disposed on each side of said tubular element along said bulb, all of said elements forming a louver-like assembly open at the bottom and closed lat the sides and top.

11. A lighting fixture adapted tov be secured to a ceiling or the like comprising, in combination, a supporting member, a channel-shaped member secured to said supporting member, said members forming an enclosure adapted to house the circuit elements of the lighting fixture, a pair of bulb sockets secured to and depending from said channel member and substantially'spaced from one another, an elongated electric light bulb adapted to be detachably' mounted in said sockets, a tubularV light transmitting and reflecting element associated with said bulb and said channel member substantially centrally thereof, a plurality of substantially U-shaped light transmitting elements disposed on each side of said tubular element along said bulb, all of said elements forming a louver-like assembly open at the bottom and closed at the sides and top, and means securing all of said elements together so that said assembly comprises a self-sustaining unit.

12, A lighting xture adapted to be secured to a ceiling or the like comprising, in combination, a supporting member, a channel-shaped member secured to said supporting member, said members forming an en'closure adapted to house the circuit elements o.` the lighting xture, a pair of bulb sockets secured to and depending from said channel member and substantially spaced from one another, an elongated electric light bulb adapted to be detachably mounted in said sockets,

a tubular light transmitting and reflecting ele' ment associated with said bulb and said channel member substantially centrally thereof, a plurality of substantially U-shaped light transmitting elements disposed on each side of said tubular element along said bulb, all of said elements forming a louver-like assembly open at the bottom and closed at the sides and top, and means securing all of said elements together so that said assembly comprises a self-sustaining unit, said assembly having a plurality of` aligned holes therein through which said bulb is adapted to pass so that upon said bulb being secured in said sockets said assembly is supported by the bulb,

LINDSLEY SCHEPMOES.

CTI

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