US2908809A

US2908809A - Street light

Info

Publication number: US2908809A
Application number: US439298A
Authority: US
Inventors: Edward L Beach; Joseph W Steiner
Original assignee: Westinghouse Electric Corp
Current assignee: CBS Corp
Priority date: 1954-06-25
Filing date: 1954-06-25
Publication date: 1959-10-13
Anticipated expiration: 1976-10-13

Description

t- 13, 1959 E. L. BEACH ETAL 2,908,809

STREET LIGHT Filed June 25, 1954 Edward L. Beach a Joseph W. Steiner.

mil 7 m ATTORNEY Oct. 13, 1959 E. 1.. BEACH ETAL 2,908,809

STREET LIGHT 3 Sheets-Sheet 2 Filed June 25, 1954 mm mm Oct. 13, 1959 STREET LIGHT 3 Sheets-Sheet 3 Filed June 25, 1954 North Olmsted, '0hio, assignors toWestinghouse Electrlc'Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Application June 25, 1954, serial Nb. 439,258 4 Claims. '(Cl. '2'4'0-2s This invention relates generally to 'lum inaires and more particularly to a reflector type of luminaire which employsa high intensityelongated light source.

Luminairesof this general type may obviously be used in various types of installations, however one-particularly desirable usefor such luminaires is.in..str eet lighting installations wherein certain. requirements of light distribution must be obtained inorder to have a competitive product. Our. .luminaire has been designed primarily for street lighting purposes but may be utilized in any installation where .a similar light distribution is desirable, Prior luminaires of this type. have not, in general, been designed to obtain the maximumlighting eflicien'cyeconomically feasiblaor, to be readily serviced. In view of the elevated. locationof street lighting luminaires, it can be realized that servicing may represent a substantial cost in maintaining a lighting system. Also, the failure ofpriorluminaires toobtain improved lighting efliciency, requires the use of additionalluminaires-to meet a given illumination level, and this-represents ad- .ditionalinitialand maintenance costs, Further, the luminaire of. our design is ideally suited for illuminating wide areas such as the wide streets. I j g I Accordingly, one general object of our invention is to provide a new and improved luminaire for illuminating large areas. 1

Another object -of our invention is to pr ovide a new and improved reflector fora luminaire whereby an improvedlight distribution.istobtained.

Another object of our invention is to provide a new and improved reflector for .a luminaire whereby a high lighting efficiency is obtain ed. H I

Another broadobjectof our invention is to provide a new and improved luminaire for illuminating elongated areas.

Still another object of this invention is to provide a simplified form ofv luminaire for street lighting or like service, employing an elongatedhigh intensity light source so as to obtain a substantially uniform light distribution pattern.

A further object of our invention is to provide a simplified form of luminaire for street lighting or the like serviceemploying an elongated high intensity light source which may easily be serviced.

A more specific object of this invention is to provide a luminaire of generally ovate form having aunitary housing and mounting portion with a unitary-reflector located therein, which comprises a plurality of-difi'erently shaped portions for efliciently directing reflected light in a predetermined manner.

These and other objects of this invention. will become more apparent upon consideration of the following detailed description of a preferred embodiment thereof, when taken in connection with the attached drawings, in which:

. ,Fig. 1 is a sideelevation view of a luminaire constructed in accordance with this invention, with certain of the parts shown in section;

2,9583% P tented Oct. 13, 1959 half, of an ovate spheroid. The housing 2 is formed of one :integral piece of material, preferably a single metal .casting, such for example as aluminum or an aluminum alloy. The housing 2 has integraltherewith at fone end a mountingsleeve 4 which is adapted to receive amounting bracket. Sleeve -4 is,provided with an opposed set of machine bolts 6 for engaging such an insertedbracketwhereby the position of the luminaire thereon may be adjusted. Inorder to obtain better light distribution, sleeve 4 is inclined with relation to the plane of:the -bottom openingof the housing 2, as will be more Ifullydescribed;hereinafter. A- U-bolt 8 is mounted to be movable in a slot 10 provided adjacent the; outer end of mounting sleeve 4 of the housing at the under side thereof,. and.is,adapted,to.be drawn up into clamping engagernent with a mounting bracket when such is inertedginlhe mounting sleeve 4, to firmly secure the housingl' on any such bracket. j a

The housing 2 has also formed integrally therewith a pair of spaced. reinforcing ribs 12, which extend from ieachtside of the mounting sleeve 40f the housing, and generally longitudinally over the majorpart of the length 'of'the housing in divergentrelation. The bottom opening'of the; housing 2 is provided with an outwardly extending integral. flange 14 which has a downwardly extending lip 16 at its outer end. A portion'of the flange 14 at-one side of the housing 2 is offset as at 18, for-a purpose to be described. At the end of the housing 2 opposite the mounting sleeve 4,-there are provided spaced outwardly extending ears 20, also for a purpose which will be hereinafter described. V

A dished reflector 22 is adapted'to be mounted within the housing.2, and is formed of one piece of sheet material, and while generally of the same form as the. housing 2, it differs specifically-in details of form, as ;will'.be hereinafter described. Preferably, the reflector 22 is formed from a singlesheet of metal which is capable of being :provided with,good reflecting characteristics, such as aluminum sheet which can be polished and-treated to provide anteflicient reflecting surface. In gorder;to secure reflector 22 to housing 2 and to provide a'stifler reflector 22, itis provided at its lower edge with an outwardly extending flange 52. Housing 2 has a plurality of spaced, integral supporting bosses 24 depending from the inner surface thereof, which are internally threaded for receiving screws 26, which extend vthrough flange 52 for mounting the reflector 22 in oper- As..-m0r,e clearly shown in Figs. 1 and 3, flange 14 is :provided with an integral outwardly extending flat sup- ,portarea 15 adjacent sleeve 4 in orderto provide a pivot supporting means, for a purpose hereinafter described. Iniorder'to enclose the sides of area '15, lip 16 is accordingly :extended outward at each side of area 15, which extensions. are joined together with an integral downvwardlyextending .lip 19, which is approximately transversely. disposed ,with relation to the sleeve 4. It will be -.n. ted..that housing 2 is provided with a substantially flat wall 21 which is integral with the lower wall of sleeve 4 and which extends downwardly and outwardly from the sleeve 14'so that it terminates flush and integral with lip 19, I 7 Wall 21 is provided with an inwardly disposed ofiset .23 havinga centrally disposed opening 25 therein ,of any desired shape, so that an inwardly projecting flange 27 is formed around the periphery of opening 25. A mounting plate 29 having approximately the same contour as offset 23 may be removably secured to the outer side of flange 27 by any suitable means, such as recessed flat headed machine screws 31 engaging tapped openings n flange 27. Plate 29 may be fabricated from any suitable material, such as aluminum, and is provided with inwardly extending bosses 33. A terminal block 32, which may be formed from any suitable insulating material, is secured to the plate 29 in any suitable manner, such as by machine screws 35 threadedly engaging the spaced threaded bosses 33 in plate 29. If desired, flange 27 of housing 2 may be provided at its periphery with a recess 39 in which may be located any suitable gasket means, such as graphitized asbestos rope packing, in order that opening 25 is weather proof. By this construction, terminal block 32 may easily be removed from the outside of housing 2 by removing screws 31 and withdrawing plate 29 from the opening 25. If desired, plate 29 may be provided with some suitable means (not shown) whereby it may be grasped in order that it may readily be removed. Plate 29 may easily be properly positioned by merely placing it into the opening of offset 23 and rotating plate 29 until screws 31 are in proper alignment.

At the opposite end of housing 2, within the housing 2, there is provided a horizontally extending supporting projection 34 integral with the end of the housing 2 having a downwardly extending support 38 which is at an angle to the horizontal axis of reflector 22. Support 38 has tapped openings for receiving mounting screw 41 for mounting thereon a lamp socket 40, which extends within reflector 22 through an opening 107 therein. The lamp socket 40 is herein illustrated as being of the screw base type for receiving a lamp 46 having a screw. base which is elongated in form, and is preferably of the high intensity mercury vapor type. The particular lamp 46 illustrated, when mounted in the lamp socket 40, lies substantially in the vertical plane passing through the longitudinal center line of the housing 2 and reflector 22, and has its free end inclined upwardly above the lower edge of the reflector 22. It is, of course, obvious that other types of sockets and lamps than those shown could also be used in this design. v

Referring to Fig. 1, it will be noted that the socket 40 is provided with suitable means, such as terminals 37 (only one of which is shown) whereby wiring connections may easily be made to the socket 40. As shown, insulated conductors 101 are secured at one end, by any suitable means such as screws 57, to the terminal block 32, and at their other end are secured to the terminals 37. It should be noted that conductors 101 extend on either side of the horizontal center line of the reflector 22 and are held adjacent the upper inner surface of housing 2 by means of a pair of spaced downwardly extending bosses 53 on each side of the housing 2. Bosses 53 are each provided with a tapped opening, whereby any suitable means such as clips and screws 55 may be utilized to engage the conductors 101 and secure the conductors 101 to the bosses 53. Although not shown, it is readily apparent that power line conductors projecting from the luminaire support may be drawn inward through the center opening 59 of the sleeve 4, and downwardly to the terminal block 32, whereat they may be secured to the terminal block 32 by any suitable means such as integral pressure terminals 65. Conductors 101 and the power line conductors are provided with suflicient additional length so that when the plate 29 is removed from the opening 25 all of the conductors may be pulled outwardly through opening 25 while still being connected to the terminal block 32. By this construction it is a simple matter to service the electrical portions of the luminaire without unnecessarily disturbing the lamp 46,

reflector 22 or even lowering the globe 54. When theterminal block 32 is so removed with all the conductors attached, electrical connections may easily be made by a man at the exterior of the luminaire. This feature is particularly desirable and important in view of the fact that luminaires of the type described are usually elevated above the street level and supported from a pole. Also, initial wiring or repairs may be effected without requiring the polished inner surface of reflector 22 to be exposed, which may otherwise be damaged by careless workmanship. Another feature of this design is that win'ng repairs may be made without touching the lamp 46 or socket 40, thereby eliminating any necessity to ascertain if the light distribution of the luminaire has been affected by the repairs. Further, if desired, in view of the heat generated by lamp 46, the conductors 101 and those entering the sleeve 4 may be provided with additional separate insulation or may be fabricated from a suitable heat-resistant insulating material, such as asbestos.

As previously mentioned, the lamp 46 is preferably of the high intensity mercury type having an inner tubular envelope 48 of a high temperature-resistant transparent material, such for example as fused quartz, and having a larger outer envelope 50 of a transparent material, such as glass. In a lamp of this type, the illumination originates, of course, within the inner tubular envelope 48. In some instances, this type of lamp may have an inner envelope of a material which is less resistant to high temperatures than quartz, in which case it may be desirable to provide an arc stabilizing magnetic coil (not shown) located, for example, transversely of the housing 2 and reflector 22, at the upper portion thereof, being accommodated in a transversely extending slot cut in the upper wall of the reflector 22. Such a stabilizing coil is adapted to be connected in series with the lamp and to produce a magnetic field such that the elongated are within the lamp is not permitted to bow upwardly into contact with the inner lamp envelope. For a more complete description of such a coil reference is made to the copending application Serial No. 328,958 filed December 31, 1952 by R. W. Loehr, now Patent No. 2,778,929, and which has been assigned to the same assignee as the assignee of this invention.

In most cases, it will be desirable to provide a globe 54 over the bottom opening in the housing 2, with this globe to be made of any desired transparent material, such as glass, and it may be additionally formed with various interior and/or exterior formations, such as stippling or prisms for obtaining a more diffused or controlled light pattern. The upper open end of the globe 54 has an integral outside flange 56 which is adapted to be engaged by a clamping band 58 which surrounds the upper open end of the globe 54 and has laterally extending apertured ends 59 for receiving a clamping bolt 60 to securely clamp the band 58 to the upper end of the globe 54.

The globe 54 is adapted to be releasably supported in closed relation with the bottom opening in the housing 2 by a pivot support at one end adjacent the housing mounting sleeve 4. As shown in Figs. 1 and 3, a U-shaped bracket 150 is secured to the under side of housing 2 below cover 29 in any suitable manner such as screws 68 extending through the bight portion thereof and threadedly engaging housing 2. Each arm 66 of bracket 150 extends downwardly from housing 2 and is formed in a hook shape so as to support a pivot pin therebetween. A pair of spaced supporting arms 62, having a fixed pivot pin 64 extending therebetween, are provided integral with clamping band 58 and which extend outwardly thereof. Pivot pin 64 extends outwardly beyond the sides of each arm 62 and is adapted to engage and be removably supported by arms 66 of bracket 150. There is also provided a leaf spring 70 which is secured at one end to the clamping band 58 intermediate the pivot supporting arms 62, and which has its free end engageable with a lip 61 formed integral with the housrng.

At the other end of the and the :globe54, the clamping band 58 for theglassbowlj54 is provided with .an integral latch projection? 2 extending outwardly therefrom for engagement with a-movable latchj74, which is generally U-shaped in cross-section. The movable latch 74 is adapted to be mounted on a pivotjpin 76 .and is biased in ,a clockwise direction, as .viewed in Fig. 1,.to latching, position by a coil spring 78 mounted on the pivot pin 76 and reacting against the housing and the movable latch 74 at its opposite ends, respectively.

.in position where its upper rimis in engagement with a sealing gasket -87, wihch in turn engages the lower flange 14 of the housing 2. Preferably the gasket 87 is of a weather-proof material, such as a water repellant compressible material or the like, and is in compressed condition at the closed-position of the globe 54, to exclude the elements fromthe luminaire, and it will be observed that the downwardly extending lip 16 on the housingflange 14 further acts to protect the seal between the globe 54 and thehousing 2. If it is desired to open the luminaire for lamp replacement or for cleaning purposes, it is merely necessaryto releasethe movable latch member 74 by moving the lower end to the right as viewed in Fig. 1, untilits latch projection 82 and reset roller .80 clear the latchp-rojection 72 on the housing. The globe 54 is then freed so that its pivot pin 64 can drop down to the bottom of the slot in bracket 66 and the. bowl can then pivot downwardly about the pivot pin 64. During such downward movement the leaf spring 70, previously referred to, moves up and away from the lip 61 on the housing. The globe 54 maythen be readily replaced by rotating it a further amount until. flat surface 65 on arms 62 it at a position to clear screws 68 whereupon the globe may be merely lifted to-move its pivot pin 64 o ut ofthe slots in support 66 on the housing, and a new globeinser-ted in its place. Thereafter, the luminaire may be closed merely by swinging the refractor globe 54 back to the position shown in Fig. l, and this results in automatically latching it in closed position, as the latch projection 72 on the refractor globe will engage thereset roller 80 on the movable latch 74 during closingmovement of the glass globe, to move the movable latch member. 74 in a counterclockwise direction to enable the'latch projection 72 to slip past theroller and latch projection 82, whereupon the biasingspring 78 for the movable latch member 74 will cause it to move back where its latch projection 82 engages beneath the latch projection 72 on ,theglobe ring 58, to thereby latch it in the closed position shown in Fig. l of the drawings. During closing movement of the globe, the free end of spring 70 ultimately engages the lip 61 on the housing. Thereafter, pivot pin64 is lifted in the slots of support 66 while pivotal movement continues about the freeend of spring 70. When the adjacent edge of globe 54 engagfisgasket 8,7, spring 70 is stressed, and the, gasket is placed under spring pressure.

Referring to. the reflector 22, it will be observed that it is of a specialform so that .the incidentlight rays emanating from the lamp 46 are reflected in aparticularly useful and eflicient manner. As more clearly shown in Fig. 2, the reflector 22 is asymmetrical and is preferably fabricated as. an integral unit having in cross section an upper dome portion located in the upper portion of housing 2 including downwardly extending sidewalls 88, the lower edges of which each terminate in an integral downwardly extending curved portion 90. 'I 'hecross sections of the lowerportions 90 are preferably parabolic in formfor a purpose more fully discussed hereinafter, while the cross section of sidewalls 88 of the 6 dome are, preferably-formed with a smooth curvature which will direct light in the manner hereinafter described. As more'clearly-shownin Fig. 3, each=lower portion in plan follows a smooth" curvature which follows the general outline "of housing 2, from a point spaced inwardly from the latch end of housing '2 along each side thereof toward the sleeve 4 end of housing 2 at which latter end the portions 90 are integrally joined. together. Sidewalls' 88 are also similarly disposed in plan and, as indicated, are integral with lower portions 90.

The purpose of the particular formationof the reflector 22 can be best realized by reference to Fig. 2 of the drawings, wherein reflected ray traces are illustrated for one side of the reflector. It will be observed that the rays 100 reflected from the lower side portions 90 of the reflector are directed downwardly at a substantial angle above the nadir. Due to the curvature of portions 90, the angle that such rays are reflected above nadir will vary, however, as such curvature is slight, such variation is slight. As shown the reflected-rays are at an angle of approximately 70, and all of the reflected rays pass just below the inner lamp envelope 48 and the point of cut off, at the opposite side, defined by the lower edge of the reflector, and impinge on the refractor or globe 54 at the opposite side of the luminaire.

Referring to Figs. 1 and 3, it will be noted that the end part of lower portion adjacent the sleeve 4 (i.e., the house side of the luminaire) is available for directing light at the indicated high angles outwardly from the luminaire whereby a relatively wide street area may be illuminated. In a similar rnanner, theside portions'of lower portion 96 are available for directing light at the indicated high angles'from each side of the luminaire, whereby the spacing between theluminaires may be increased. The final part oflower portion t) adjacent the street side of the housing 2 is available for directing light at the indicated high angles toward the area adjacent the street, such as for sidewalk or building front illumination. In general, it is not necessary that the sidewalk lighting be of as high intensityas that 'on' the street, and accordingly, the placement of socket '40 in this area with a loss of a corresponding portion of the area for directing such light, does not appreciably affect the overall efficiency of the luminaire. To furtheretfect a wider distribution of light along the sidewalk and adjacent area on the house side of the luminaire, that portion of the reflecting surface 90 containing the opening for the lampholder is preferably fluted. 'Such fluting consists of a series of adjacent vertically extending cylindrically shaped surfaces 116 projecting inwardly and extending upwardfrom the flange 52 to the top of the reflector at the center, and of progressively shorter length toward the sides. The flutes assume the curved shape of surfaces 88 and 90. If desired, in order to reduce the amount of light directed'to the house side of the luminaire, a shield 111 may be secured to the lower side of reflector 22 to extend downwardly within globe 54. Shield lllvis provided with an upper transverse flange 112 having openings therein, whereby it may be secured in position by meansof screws 26 extending therethrough and engaging bosses 24, previously described. Shield 111 is preferably formed from any suitable reflecting material, such as aluminum, whereby it may reflect light rays outwardly therefrom toward the street side of the luminaire. 7

It will also be observed-from Fig. 2 that the rays 102 reflected from sidewalls 88 of the upper dome arereflected at a lesser angle above nadir and downwardly.

The limiting reflected rays 102 are illustrated at angles of approximately 25 and 65 above nadir and are so directed as to avoid passage through the inner lamp envelope 48 and yet emerge below the point of cutoff defined by the lower edgeof the reflector. That portion of .the reflector between the,angles.illustrated directsthe rays in the intermediate angles, also avoiding the arc tube 48. By this construction, a fairly uniform light distribution is obtained, as rays 102 illuminate the area between that of the rays 100 and the luminaire. Inasmuch as direct light rays (not shown) from lamp 46 illuminate the area directly below the luminaire, no reflected light is required therein.

It will be noticed that substantially all of the reflected rays are thus Within. the cutoff angle provided by the lower edges of the reflector 22 and housing 2, and that the reflector 22 has its lower edge extending below the lower edge of the housing 2 and into the globe 54 when in operative position. Such construction obviously prevents loss of direct light from the lamp by absorption by the inner faces of clamping band 58. The fact that this particular reflector is capable of directing substantially all reflected light rays in a manner to avoid the inner envelope 48 of the lamp prevents absorption of reflected light by the envelope which immediately surrounds the light source. The light source is thus located in an isolated zone through which no reflected light passes and thereby efliciency of the luminaire is further increased.

Another feature of our invention, more clearly shown in Fig. 1, resides in the fact that sleeve 4 is angularly disposed with relation to housing 2. In substantially all street lighting installations the support member which enters sleeve 4 and which is engaged by bolt 8 is horizontally disposed above the street that is to be illuminated. In many installations it is particularly desirable to illuminatean area a considerable distance beyond the luminaire on the opposite side of the street from which the luminaire is supported. In order to accomplish thus purpose, in addition to the rays 100 from the house side of the luminaire, previously discussed, the sleeve 4 is located with respect to the bottom plane of the reflector 22 at an angle, illustrated at 15 degrees, so that when sleeve 4 is horizontally mounted the street side of the luminaire will be elevated above the house side of the luminaire. By this construction, it will be obvious that a greater area of the reflector 22 will face outwardly toward the street from the luminaire, so that additional light may be reflected from this area outwardly toward the street from the luminaire. Also, this construction permits a greater percentage of direct light from lamp 46 to illuminate areas of a greater distance across the street from the base of the luminaire. All of the rays 100 and 102 will be effected in a similar manner when the street side of the reflector is elevated. Further, by locating the socket 40 on the street side of the luminaire, the entire reflector area of the luminaire adjacent the sleeve 4 of the housing is available to distribute light from the lamp 46 to the side of the street opposite that where the luminaire is mounted.

Another feature of our invention shown in Fig. 1 is in the fact that lamp 46 may be mounted within the refiector 22 at various horizontal angles 160. It is well known that optical systems of this general type produce two main beams extending in opposite directions from the luminaire and downwardly toward the surface of the street below. Each of these main beams has a high vertical candle power distributed essentially in a lateral plane extending downwardly and outwardly from the luminaire, which plane will rotate about the central axis of the main beam if the longitudinal axis of the lamp 46 is changed in vertical attitude, or if the entire optical system of the luminaire is similarly rotated. For most installations it is desirable that the intersections of the lateral planes of high candle power with the surface of the street be at substantially right angles to the curb. As has been previously discussed, the entire optical system has been elevated 15 at the street side in order to produce a greater illumination directly across the street. Such elevation of the optical system changes the angle of the intersection of the lateral planes of high candle power with the street relative to the curb to an angle other than 90. In order to restore such angle of intersection to substantially 90 the lamp 46 is inclined in the reverse direction, illustratively 10. Inasmuch as the optical system remains tilted at 15", the inclination of the lamp has no effect on the illumination which is provided at the opposite side of the street but such inclination of the lamp does provide proper illumination distribution in the region of the lines of intersection of the lateral planes of high candle power with the street.

Thus, it will be apparent that by our design a high efiiciency of the light emanating from the light source 46 is obtained, as essentially no reflected light rays are absorbed by the light source. Further, the distribution of such a luminaire has been improved by providing a greater reflector area for reflecting light rays outwardly from the support upon which the luminaire is secured. Also, as the mounting of the socket for supporting the lamp is in a zone which does not direct light to the opposite side of the street from which the luminaire is supported, it permits all of the reflector facing the opposite side of the street to be utilized to direct reflected light rays away from the luminaire support. As has previously been discussed, the plate 29, its location and its design also contribute to ready servicing of the luminaire from the pole with a minimum of eflort, inasmuch as all connections can be made at a convenient level rather than at some extended position.

In view of the foregoing description of a preferred embodiment of our invention, it will be apparent that we have provided a luminaire of extremely simple construc tion which may readily be serviced and relamped and which obtains a high utilization of the light from a light source. It is desired, however, that this invention be not limited to the particular form of luminaire specifically described herein, as it will be readily apparent to those persons skilled in the art that various changes and modifications may be made in the particular construction shown, without departing from the broad spirit and scope of our invention. Thus the luminaire may have various forms of housings or support means and may be used with or without a globe. If desired the housing 2 may be made non-symmetrical about its axis. Also by changing the location of sleeve 4, the distribution of the reflected light from the light source may be varied in accordance with various desired conditions. Such modifications are illustrative, but not limiting as to other forms which this invention may take and of various manners in which the principles of our invention may be utilized. Accordingly, it is desired that this invention be given a broad interpretation limited only as required by the prior art.

We claim as our invention:

1. A street-lighting luminaire adapted to be mounted at one side of a street comprising an elongated inverted one-piece shallow dished housing having a bottom opening located substantially in one plane, a sleeve portion integral with said housing at one end thereof adapted to receive a support for said luminaire, said sleeve extending at an angle with relation to said one plane so that when said sleeve is horizontally mounted the other end of said housing is elevated above said one end, an elongated inverted dished reflector mounted longitudinally within said housing adjacent the inner surface thereof and with its bottom opening located adjacent and substantially parallel to said one plane, said reflector having at least longitudinally extending lower side portions formed to reflect beams of light at relatively high vertical angles and intermediate longitudinally extending portions formed to reflect light generally at lower vertical angles, and means for supporting an elongated light source at one of its ends within said housing so that said light source extends generally longitudinally and centrally with respect to said reflector at an angle intermediate said one plane and the angle of said sleeve.

2. A luminaire comprising an elongated one-piece shallow dished housing having a bottom opening located substantially in one plane, a sleeve portion integral with said housing at one end thereof adapted to receive a support for said luminaire, said sleeve extending at an angle with relation to said one plane so that when said sleeve is horizontally mounted the other end of said housing is elevated above said one end, an elongated dished reflector mounted within said housing adjacent the inner surface thereof and with its bottom opening located ad-- jacent and substantially parallel to said one plane, lampholding means mounted in said housing and located solely adjacent the other end of said housing for supporting an elongated light source at one of its ends Within said housing so that said light source extends at an angle intelmediate said one plane and the angle of said sleeve, and said lamp holding means being angularly disposed with relation to said one plane so that said light source extends upwardly within said reflector.

3. A luminaire of generally ovate form and including a reflector which is ovate in form and of inverted cup-shape with a bottom opening located in one plane, a mounting sleeve at one end of the luminaire and having an axis extending at an angle to said one plane so that when the sleeve is mounted on a horizontal support the opposite end of the refletcor will be elevated, means for supporting an elongated light source at one end longitudinally in said reflector adjacent its bottom opening but at an angle intermediate said one plane and the angle of said sleeve, and said reflector having fluted light dispersing surfaces solely at the other end thereof.

4. A luminaire comprising a dished housing having a bottom opening located substantially in one plane, a sleeve portion integral with said housing adapted to receive a support for said luminaire, said sleeve extending at an angle with relation to said one plane so that when said sleeve is horizontally mounted the opposite portion of said housing is elevated above the part of the housing having said sleeve, a dished reflector mounted within said housing, lampholding means located adjacent said opposite portion of the housing for supporting an elongated light source at one of its ends within said housing so that said light source extends generally longitudinally with respect to said reflector at an angle intermediate said one plane and the angle of said sleeve, said one end of said housing having a removable portion below said sleeve portion, a plurality of electrical conductors extending between said lampholding means'and said removable housing portion, and said removable housing portion having terminal means adapted to be connected to an electrical source of energy and said electrical conductors.

References Cited in the file of this patent UNITED STATES PATENTS 2,035,215 Bean Mar. 24, 1936 2,140,646 Mitchell Dec. 20, 1938 2,289,160 Yost July 7, 1942 2,318,536 Stern May 4, 1943 2,584,671 Cator et a1. Feb. 5, 1952 2,599,285 Rex June 3, 1952 2,619,584 Hathaway Nov. 25, 1952 2,739,226 Rex Mar. 20, 1956 2,778,929 Loehr Jan. 22, 1957 FOREIGN PATENTS 667,085 Great Britain Feb. 27, 1952 706,496 Great Britain Mar. 31, 1954