US 2665372 A
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Description (OCR text may contain errors)
5, 1954 B. A. WYMAN ET AL 2,665, 72
INCANDESCENT SPOTLIGHT LUMINAIRE Filed July 31, 1947 2 Sheets-Sheet l INVENTORS Burfon A. W man & Ffwederz'c C. [hi/e).
ATTNEY Jan. 5, 1954 B. A. WYMAN ET AL INCANDESCENT SPOTLIGHT LUMINAIRE 2 Sheets-Sheet 2 Filed July 31, 1947 INVENTORS .Burfon /7. Wymazn FI der/c C. Win/ Zen WITNESSES:
-eral reasons. posed and the lamp faces have a high surface brightness. The assembly has an unfinished ap- Patented Jan. 5, 1954 INCANDESCENT SPOTLIGHT LUMINAIRE Burton A. Wyman and Cleveland, Ohio, ass Electric Corporation, corporation of Pennsyl Frederic C. Winkler,
ignors to Westinghouse East Pittsburgh, Pa., a vania Application July 31, 1947, Serial No. 765,096
Our invention relates, generally, to luminaires and, more particularly, to an incandescent luminaire of the swivelling spotlight type which is particularly adapted for the soptlighting of merchandise displays, either as a separate unit or in conjunction with other types of luminaires procli-iciirlg general illumination.
The fluorescent lamp and luminaires utilizing such lamps have become widely used and accepted for the general lighting of stores and other commercial establishments. While these luminaires are highly advantageous for this purpose from the standpoint of eiiiciency, brightness, coolness, etc., they do not provide for concentrated or spotlighting of merchandise displays. In almost every commercial establishment there is a need for such concentrated lighting or highlighting of featured merchandise, bill boards, animated displays, murals, demonstrations, etc.
While spotlights of the ordinary type are available for this purpose, it is highly desirable that the luminaire so used should be as inconspicuous as possible, mounted directly on the building walls, columns or ceilings and be an integral and streamlined part of the general lighting system. These luminaires also should be readily adjustable to allow the intense light beams produced thereby to be directed or pointed in any desired direction. These luminaires should be so constituted as to produce an intense narrow light 'beam of lasting efliciency. Heretofore, attempts have been made to produce this kind of spotlighting by using prefooused sealed beam lamps in a bare lamp holder, swivelling or fixed, but such practice has not been found satisfactory for sev- The lamps when so used are expearance and does not harmonize with the other general lighting equipment. Accordingly, it is to the solution of this problem of providing eflicient, effective and pleasing spotligting of lamp displays and the like that our invention is directed.
Therefore, the object of our invention, generally stated, is to provide a luminaire of the swivelling spotlight type which will be of simple and efiicient design, of pleasing appearance and compact construction having maximum adjustability, and adapted to produce an intense narrow light beam. Amore specific object of our invention is to provide a luminaire of the character described which is adapted for use alone as a single spotlight unit or in conjunction with other similar luminaires to form a combination spotlight unit, or in conjunction with other general lighting luminaires as combination units or assemblies.
A further object of our invention is to provide a luminaire of this character wherein the lamp is supported or mounted on a readily adjustable swivelling mechanism within the housing or body member of such nature as to permit the lamp to be properly pointed in the desired direction without making mechanical adjustments to release or retain the lamp in the desired position.
Another object of our invention is to provide a luminaire of this character wherein the lamp and its socket are adjustably supported from the body member by means of a reflector housing pivotally secured at one side only to a reflector ring which is rotatably mounted at the bottom of the body member, and adjustably secured to the reflector ring at its other side by a friction device, thereby to permit both rotational and elevational adjustment of the lamp.
Another object of our invention is to provide in a luminaire of the character described, for supporting the lamp from the body member by means of a lamp housing protruding through an opening in the body member and adjustably secured thereto for elevational and rotational adjustment in such manner that the bottom opening in the body member is always closed regardless of the position in which the reflector housing may be adjusted.
Another object of our invention is to provide a luminaire of the character'described having a ring-shaped louver mounted at the openend of the reflector housing in front of the face of the lamp supported by the housing, the louver being tapered longitudinally in accordance with the angle of the light rays produced by the lamp.
These and other objects of our invention will become more apparent from the following detailed description when read in conjunction with the drawingsin which:
Figure 1 is a general view of a lighting combination composed of a luminaire for producing general lighting and a pair of incandescent spotlight luminaires embodying the principal features of our invention;
Fig. 2 is a partial perspective view of the spotlight luminaire of our invention;
Fig. 3 is an exploded perspective view of the luminaire showing the lamp assembly detached from the body member;
Fig. 4 is a perspective view of the complete luminaire;
Fig. 5 is an end elevational view, partly in crosssection of the luminaire;
Fig. 6 is a partial bottom view of the luminaire of Fig. 5;
Fig. 7 is a detail cross-sectional view taken along line VII-VII of Fig. 6, and
Fig. 8 is a similar view taken along line VIII-VIII of Fig. 6.
Referring to Fig. 1, there is shown an arrangement comprised of a plurality of luminaires iii and H for producing general illumination .and a pair of spotlight luminaires l2 and Hi embodying our invention, mounted therewith in end-to-end relation.
The general lighting luminaires land I I may be, and preferably are, of the type disclosedin our copending application, Serial No. 764,936, filed July 31, 1947, and issued August 12, 1952 as Patent No. 2,606,998. These luminaires are adapted for use with tubular fluorescent lamps for producing general illumination as distinguished from concentrated or spotlightillumination.
The luminaire of our present invention is so shaped and constructed that it may be used with these other luminaires for producing general illumination by simply mounting the various units in end-to-end relation in any desired combination. Fig. 1 illustrates only one possible combination.
In addition, the spotlight luminaire of our present invention may be used separately as a single spotlighting unit, or it may be combined with other similar luminaires to producea combination spotlighting unit.
Referring to Figs. 2, 3 and 4, it will be observed that our spotlight luminaire comprises, generally, a body member l5 and a lamp assembly 16. The complete unit also includes a pair of detachable end caps IT, as shown in Fig. 4, which are removed when it is desired to connect the spotlight luminaire in end-to-end relation with other luminaires.
Referring in addition to Fig. 5, the body member l5 may comprise a-trough-shaped canopy 18 to which are attached at its opposite ends, a pair of end members l9 and'2l. The end members close the ends of the canopy l8 and extend downwardly below the lower edges thereof. These downwardly extending portions of the end members are fiat oval shaped, as clearly shown in all of these views, and are so formed as to provide inwardly facing channels 22, as shown in Fig. 5.
The body member [5 is provided with curved side walls 23 and 24, the ends of which are dispo ed in channels 22. In this instance, the side walls are attached at their upper edges to the canopy by means of screws 25 and are secured at their lower edges to mounting angles 26 by means of screws 21.
The mounting angles 26 extend from one end of the body member to the other and are attached ,at their op osite ends to brackets 28 on the end members. These brackets may be separate-members or lanced out of the end members.
The cano y is relatively fi t on top. as shown in Fig. 5, to adapt it for surface mounting on a ceiling or other supporting structure. A. wirin 4 channel or wireway 3i is provided inside the canopy by means of the channel member 32. The canopy is also provided with knock-out portions 33 at the ends thereof.
It will be apparent that the arrangement described provides a body member with a relatively large rectangular opening 34 at the bottom. This opening is provided with a detachable cover member 35 which is a portion of the lamp assembly 16. As shown best by Figs. 3 and 5, the cover member .35 is slightly curved to conformto the curvature of the lower edges of the end members l9 and 2 l. It is provided with a pair of circular openings 35 at its opposite ends and is detachably secured to the body member at its four corners by means of screws 31 which extend into suitable threaded openings at the ends of the mounting angles 26.
In this instance, the lamps 38 which are used aslighting sources for the luminaire are preferably of the prefocused sealed beam type, as shown. In order to provide for mounting these lamps so that they may be readily adjustable in both a rotational as well as an elevational manner to properly direct the light beams in the desired direction, they are each supported from the body member by means .of a swivelling mechanism or mounting indicated generally in Fig. 5 by the numeral 4|. Since these mechanisms are identical, only one will be described in detail.
It will be observed that the swivelling mechanism 4| comprises .a reflector housing 42 at the upper end of which is mounted a lamp socket 43, a reflector ring 44 and as a part thereof, a friction support in the form of a U.-shaped spring member 45.
As shown best in Fig. 5, the reflector housing 42 is mounted with its lower or .open end extending out of the bodymember through the opening 36 in the cover member 35. The reflector housing is supported directly by the refiector ring 44, the outer rim portion 46 of which engages the rim portion of the opening 36.
The ring member 44 is attached to the cover member 35 asshown in detail in Figs. 6, '7 and 8. The rim portion .46 of the ring member is held in engagement with the cover member by means of a plurality of spring clip members 48 which are attached to the ring member by means of suitable screws 49. Two of the fastenings as indicated at A and B in Fig. .6 .are identical and are shown in Fig. 8, .The other which is indicated at C in Fig. 6, is shown in detail in Fig. 7. It is substantially the same insofar as the fastening arrangement is concerned, but in addition, in cludes a stop member 5|, the function of which will be described hereinafter.
It will be apparent that by means of this arrangement, the ring member 44 is rotatably mounted within the opening 36 in the cover mend-- 'ber. Referring to Fig. 5, it will be observed that a U-shaped stop bracket 52 is mounted on the cover member between the reflector housings. This stop bracket has oppositely extending end portions 53 which are in the path of movement of the stop member 5| carried by the ring member. By means of this arrangement, the rotation of the ring member is limited to somewhat less than 360.
The ring member 44 is provided with an upwardly extending flange portion 54 defining a central opening which is of substantially the same diameter as the outside diameter of the reflector housing 42 at this point. In order to provide for so attaching the reflector housing to the ring member that it may be moved in and out of the body member to effect elevational adjustment, it is loosely connected at one side only to the flange 54 of the ring member by means of a single clip member 55 attached to the ring member 44 by the screw 49 with its end portion 55 extending through an opening 51 in the side of the reflector housing as shown. This arrangement provides a pivotal or hinge connection between the reflector housing and the ring member at this one side of the housing. Any other suitable arrangement may be used.
The opposite side of the reflector housing is preferably supported and connected to the ring member 44 by means of the U-shaped bail member 45 which has its connecting portion 58 attached to the ring member, as shown clearly in Fig. 6 and its free ends 59 and Bi] extending upwardly along the opposite sides of the reflector housing, as shown clearly in Fig. 5. In this instance, the bail member 45 is preferably composed of spring wire and is attached to the ring member 44 by bending a portion of the flange 54 about the connecting portion 58, as shown.
In this embodiment of the invention, the free ends 59 and 50 of the bail member engage the free ends of a clip member 5| which is attached to the housing 42 adjacent its upper end. This arrangement is shown best in Fig. 5 and is of such nature that the free ends of the bail member engage the free ends of the clip member with sufficient frictional force as to hold the reflector housing and its associated parts in any desired position of tilt from that shown in full lines to that shown in broken lines.
It will be apparent that by means of this type of swivelling mechanism for supporting the lamp, it may be readily adjusted in both elevational and azimuth rotation without the use of tools of any kind. Both the rotational and elevational adjustments are made by simply actuating parts which are frictionally engaged and which remain in the position at which they are actuated.
An important feature of our invention resides in the fact that the reflector housing 42 always substantially fills the opening in the cover member 35, regardless of the position at which it is actuated. The effectiveness of the bail member in supporting the housing and holding it in the desired position is also substantially uniform throughout the range of movement. These fea-- tures are produced by so shaping the curvature of the walls of the reflector housing that the arc of curvature in the vertical plane has a radius point which substantially coincides with the pivotal attachment between the reflector housing and the ring member. The same is true with respect to the curvature of the free ends of the bail member 45. They also have a radius of curvature about this pivotal connection.
It is preferable to provide a light controlling louver for each of the light sources. As shown in Fig. 5, each of the reflector housings is provided with a ring-shaped louver 65 attached to a cover member 66 by a plurality of pins or bars 61. The cover member 56 is provided with a central opening 68 having a diameter which is the same as or smaller than the diameter of the face of the lamp. The ring-shaped louver 55 is supported within this opening 63 by the crossed pins 61 having their ends attached to the inner edge of the cover member 66 by crimped ears 69, as shown.
It will be apparent that this arrangement causes most of the light from the lamp to be projected through a relatively small opening. The light rays from lamps of this kind converge at a point about. 18 inches in front of the lamp face and then diverge. This creates a problem to provide effective shielding by means of a louver, as the use of any louver having side walls parallel to the lamp, will result in high reflected brightness. This results from the fact that the louver will intercept a large amount of converging light rays.
In order to avoid this and to provide for effective shielding, the louver 65 is tapered, as shown, from the inside to the outside of the reflector housing to a degree or at an angle corresponding to the angle of convergence of the light rays. This arrangement is such as to intercept only a minimum of the light and also provides low brightness of the louver.
As stated hereinbefore, ornamental end caps I! are provided and detachably secured to the end members 19 and 2| of the body member to provide a finished appearance to the luminaire. These end members may be attached to the end members in any suitable manner, such for example, as described in the aforesaid copending application. As described therein, but not clearly shown in detail in the drawing of the present application, these end members are provided with a plurality of outwardly extending lug portions (not shown) around the periphery which engage spaced slots H in the end members, as shown in Fig. 2, for example. The rigid portions of the end members snap in and out of these slots in a well known manner.
If it is desired to use a single spotlight luminaire as a unit, both of the end members are attached. Where the spotlight luminaire is connected in end-to-end relation with other luminaires and is the end unit, as shown in Fig. 1, only one of the end members is used. Accordingly, it will be apparent that the use of ornamental, detachable end members make for more flexible designs enabling the spotlight luminaire to be used or applied in a variety of different ways.
In view of the foregoing detailed description of a preferred embodiment of our invention, it will be apparent that we have provided an incandescent spotlight luminaire of such shape and general appearance that it may be readily combined with fluorescent lamp luminaires for general lighting of the same shape and general appearance to achieve an integration of the fluorescent and incandescent designs of fluorescent luminaires, not heretofore obtainable. This is an important aspect of our invention in that it makes for a very flexible and pleasing arrangement to produce both general and spotlight illumination.
The luminaire of our invention is also of simple construction and is so constructed that the light beam or beams produced thereby may be readily adjusted, without the necessity of using tools, to any position within the range of the luminaire. Furthermore, it is so constructed that it is composed of only two main parts or assemblies, namely, the body member and the lamp assembly.
While we have shown and described as a preferred embodiment a luminaire having a pair of light producing elements or lamps, it is to be understood that our invention also contemplates a luminair with a single lamp or a lu- 7 minaire with more than a pair of lamps as shown.
In addition, while we have shown and described, in detail, a preferred structure, it is to be understood that the principles of our invention may be embodied in other forms without departing from the spirit of the invention.
We claim as our invention:
1. A spotlight luminaire comprising, a body member having a bottom portion with a circular opening therein, a sealed beam lamp, an inverted cup-shaped reflector housing including a lamp socket for supporting the lamp within the body member, a ring member rotatably mounted on the bottom portion of the body member around the edge of the bottom opening, means pivotally securing the reflector housing at one side to the ring member, the open end of the reflector housing extending through the ring member and bottom opening and being of a size to substantially fill the opening in said ring, and additional means adjustably securing the other side of the reflector housing to the other side of the ring member, whereby the ring member may be rotated to effect rotational adjustment of the reflector housing and the reflector housing itself rotated about its pivotal support in a plane at right angles to the plane of rotation of the ring member, the curvature of the walls of said cup-shaped reflector housing having a radius point in the plane of its pivotal rotation which substantially coincides with the pivot of said housing, whereby said housing and ring substantially fill said circular opening in the bottom portion of said body member for all operative positions of said housing.
2. A spotlight luminaire comprising, a body member having a bottom plate portion with an opening therein, an inverted cup-shaped reflector housing mounted in the body member with its open end extending outwardly through the bottom opening, said bottom opening being larger than the reflector housing, a reflector ring member encircling the reflector housing and having a flat rim portion slidably secured to and in engagement with the rim of the bottom opening, said ring member being pivotally attached at one point only to the side wall of the reflector housing, and means including a U- shaped bail member attached to the opposite side of the ring member from the pivotal attachment and having a slidable frictional connection to the reflector housing for adjustably supporting the reflector housing at its other side, thereby to provide a swiveling attachment of the reflector housing to the bottom portion of the body member.
3. A spotlight luminaire comprising, a body member having a bottom portion with an opening therein, an inverted cup-shaped reflector housing mounted in the body member with its open end extending out through the bottom opening, a reflector ring member encircling the reflector housing and having a flat rim portion slidably mounted on the bottom portion of the body member and also having an upstanding flange portion, a connecting member between the rim portion and the reflector housing forming a pivotal connection therebetween at one side of the reflector housings; clipmember attached to the opposite side of the reflector housing, and a U-shaped wire bail attached to the opposite side of'the'ringm'e'mb'er having the free ends of the U extending upwardly along the sides of the reflector housing into frictional engagement with the clip member for adjustably supporting the said opposite side of the reflector housing, whereby the reflector housing may be rotated in one plane by rotating the reflector ring and in another plane by rotating it about the pivotal connection on the reflector ring, to thus provide a swiveling mounting for a lamp carried by the reflector housing.
4.. A spotlight luminaire comprising, a body member having a bottom portion with an opening therein, an inverted cup-shaped reflector housing mounted in the body member with its open end extending out through the bottom opening, a lamp socket mounted on the reflector housing for supporting a lamp therein, a reflector ring member encircling the reflector housing and having a flat rim portion engaging and overlapping the rim portion of the bottom opening, a plurality of clip members retaining said rim portions together in frictional sliding relation, a stop member mounted on the bottom portion of the body member for limiting th rotational movement of the ring member, said ring member having an upstanding circumferential flange portion around its inside edge forming an opening to receive the reflector housing in sliding relation, a pivotal connection between the ring member and the adjacent side wall of the reflector housing at one side only, a clip member in the form of a cross bar attached to the opposite side of the reflector housing adjacent its upper end, and a U-shaped bail member attached to the opposite side of the reflector ring with the free ends thereof extending upwardly along the sides of the housing in engagement with the free ends of the clip member to slidably support the said opposite side of the reflector housing, said opposite side of the reflector housing having a curvature determined by an arc the radius point of which is on the pivotal connection between the reflector housing and flange of the reflector rim, whereby the reflector housing substantially fllls th opening in the reflecting ring as it is swung in and out of the body member.
5. A spotlight luminaire comprising, a housing having a bottom opening, a circular plate supported at its peripher by said housing in said bottom opening for rotation about a substantially vertical axis, said plate having an opening therethrough in which a lampholder is mounted by a pivotal connection located at one side thereof on a substantially horizontal axis to said plate so as to be movable between upper and lower extrem positions about said horizontal axis, said lampholder having means above said openings .for supporting a lamp so that at the upper extreme position the lamp depends substantially vertically from its supporting means and its lower end is adjacent said openings and light will be directed downwardly through said plate opening, and at the lower extreme position said lamp extends through said openings at an angl to the vertical with its lower end spaced substantially below said openings, said lampholder having shielding means positioned about at least the side portions of the lamp which project below said openings at the aforesaid lower extreme positions, and separate means located at the opposite side of said lampholder frictionally connecting th lampholder and supporting means for maintaining said lampholder at any angular position to which it may be manually adjusted about said horizontal axis.
BURTON A. VIYMAN. FREDERIC C. WINKLER.
References Cited in the file of this patent UNITED STATES PATENTS Number Galetzky Oct. 20, 1931 10 Number Name Date 2,063,744 Kramer Dec. 8, 1936 2,134,491 Sibbert Oct. 25, 1938 2,152, 97 Levy Mar, 28, 1939 2,179,161 Rambusch Nov. 7, 1939 2,189,008 Kurth Feb. 6, 1940 2,232,543 Logan Feb. 18, 1941 2,390,634 Aufiero Dec, 11, 1945 2,434,108 Handler Jan. 6, 1948 OTHER REFERENCES General Lighting 00., Rotobeam, Lighting and Lamps, March 1946, page 122.