US1863703A - Luminair for corridors, etc. - Google Patents

Description

Patented June 21, 1932 UNITED STATES JACOB L. STAIR, OF CHICAGO, ILLINOIS LUMINAIR on ooaarnoas, ETC.

Application filed Sept mber 6, 1930. Serial No. 480,111.

My inventionrelates to illuminating fixtures and has particular reference to a luminair for use in corridors, hall-ways and the like, and it is especially designed to project light rays from a lamp in a lateral direction out of the fixture so that the rays will travel transversely across the hall-way or corridor to illuminate the longitudinal walls thereof as well as such pictures, decorations, or exhibits that may be lined along said walls. At the same time the particular construction of the luminair prevents both the direct and the reflected light rays from dazzling the eyes of persons in the corridor. Furthermore, the

structure of the fixture is such-that the exterior walls of the reflecting elements will be illuminated to a limited extent thereby preventing the appearance of dark spots at the .location of each luminair.

The fixture which I have devised is simple in construction so that it may be produced in an economical manner, and it consists of three main parts, two of which are duplicates, and

all may be made by stamping operations.

Furthermore, the device is novel in construe tion, dependable in operation, and has no partswhich will get out of order.

I prefer to carry out my invention and to accomplish the numerous parts thereof in substantially the manner hereinafter fully described and as more particularly pointed out in the claims. Reference is herein made to the accompanying drawing that forms a part of this specification, in which,

3 Figure 1 is a perspective of my corridor luminair looking at the same in an upward direction in the manner in which it will appear upon a ceiling.

, Figure 2 is a transverse horizontal section "taken on line 2-2 of Figure 8 looking in the direction of the arrows.

one of the open sides of the fixture, a portion thereofbeing in section on line 8 3 of Figure 2.

The drawing will be understood as being more or less schematic and illustrates a pre ferred or typical form of my invention, it being understood that the shapes of the parts 5 maybe modified for the purpose of ornamentation or adaptation to diflerent uses. In said drawing similar reference characters are employed to designate the same parts wherever they appear throughout the several views.

Referring to the drawing, it will be seen my invention comprises a luminair or lighting fixture that consists of a ceiling element of a somewhat box-like form and having an open bottom portion, and a pair of oppositeso" ly disposed reflector elements depending from the ceiling member at the end portions there of. Thus, the fixture maybe said to be of U-shape when viewed from the side as seen in Figure 3. This provides open sides and bottom through which the light. from the lamp-is emitted in lateral and in downward directions, and the ends provide bafiles that shield the light from the eyes of persons moving down the hallway or corridor in which one or more of these fixtures are installed. I I

The ceiling member, as above stated, is. of box-like form consisting of a plate 5 of sub-. stantially rectangular outline except that its longitudinal side. edges which are disposed substantially parallel to the longitudinal walls of the, corridor, are curved inwardly in a concavemanner as seen in Figure 2. The ends of the plate are provided with down-turned flanges 6, 6, that are substan- V tially at right-angles to plate 5 and the longitudinal curved edges are provided with similar flanges 7, 7, that how inwardly. Thus a ceiling member of box-like shape-is pro- 8: vided that has an open lower portion. A central opening 8 is provided in the plate 5 for the socket outlet 9 to receive the electric lamp or bulb 10, and segmentally curved slots 11, 11, are disposed around the central open- I ing to receive the screws that attach the Figure 3 is a vertical elevation looking at luminair to a well-known commercial type of outlet box (not shown).

The reflectorelements consists of concavoconvex plates mounted at each end of the box-like ceiling member and. as these are du-' plicates of each other, one'only. will be described. The refiector consists of a plate, preferably of metal, the main or body portion of which is bowed or curved to provide a concave reflector 12 that may be of any desired curvature and Which, as shown in Figure 2, is segmental or semi-cylindrical shape in crosssection, the curve being struck in the center of the opening 8 in the ceiling fixture. This particular curvature however is not essential as it may be modified accord ing to the use to which the fixture is to be p Extending angularly along the longitudinal sides of the reflector are obliquely 'disposed wings 13 that are of such dimensions and shape that their upper portions fit against the adjacent portions of the depending flanges 7 7, of the ceiling member. This permits the reflector elements to be readily attached to said flanges 7, 7, by means of spot weldingor soldering, and thereby reduces the expense incident to assemblinga structure of this character.

The reflector 12 has its upper edge disposed below the plate .5 of the ceiling member, and the central portion of the bulge of the reflector is spacedlaterally or separated from the end of wall 6 of the ceiling member, as shown respectively in Figure 3 and Figure 2. This disposition of the upper edge or upper portion of the reflector permits upwardly eminating light rays from the lamp to pass over the top of the reflector element and impinge upon the inner surfaces of the plate 5 and end wall 6 of the ceiling memher, and then be directed downwardly against the outside of thereflector member to illuminate the same so that when the end of the luminairis observed it will appear luminous, thus avoiding the appearance of a dark spot at the location of the luminair.

The reflectors being at opposite ends of the ceiling member and the fixture having practically no side walls, the direct light rays from the lamp 10 will be projected through the open sides to the walls of the corridor in which the fixture is installed. Similarly the light rays from the lamp that are diverted from the reflectors 11 will be projected through the open sides of the fixture. The side wings or light baflies 13 are arranged so that both the reflected and direct rays from the lamp are notvisible longitudinally. of the corridor thus avoiding dazzling the eyes of persons therein. Furthermore, the reflectors extend down below the lamp a distance sufficient so that direct rays radiating towards the ends of the fixture or longitudinally of the corridor are not observed by pedestrians and are-projected along the plane of the dash line A in Figure 3. The plane of the uppermost reflectedrays are indicated by the dotand-dashline B. on the same figure of the drawing- What I claim is v I 1. A lighting fixture comprising a boxlike structure providing a supporting element that is open at its bottom, concave reflector plates depending from the ends of said element, and a lamp within the fixture between the reflectors whereby direct and reflected 7 walls of said element, the sides of the fixture 85. ally out of the fixture, and a lamp between I being open to permit passage of lightlaterthe reflectors. V I 3 p l. A lighting fixture comprising a supporting element havinga top, end and side. walls pendent from said top providing an open bottom, pendent reflectors adjacent the end walls and spaced from the latter and: from the top, and a lamp between the reflectors whereby light rays pass out of the open sides of the fixture and other light rays pass over the reflectors and illuminate the outer surfaces thereof.

5.'A lighting fixture comprising a pair of spaced substantially vertical reflectors that face each other, a lamp intermediate said deflectors, and light deflecting shields upon the edges of each reflector.

6. A lighting fixture comprising an attach ing member. substantially vertical reflectors depending therefrom in spaced and facing relation to each other and of concavo-convex cross-sectional shape, a lamp intermediate said reflectors, and light deflecting shields upon the vertical edges ofsaid reflectors.

7. A lighting fixture comprising a supporting element of box-like shape, pendent reflectors adjacent the end walls of; said element and facing each other in spaced relation providing open sides to permit passage of light laterally out of the fixture, and a lamp between the reflectors.

8. A'lighting fixture comprising a supporting element having depending end and side walls, pendent reflectors extending between the side walls and spaced from the top and end walls, and a lampbetween the reflectors. v v I 9. A lighting fixture comprising a support ing element ofbox-like shape, pendent reflectors adjacent the end walls of said element and facingeach other inspaced relation, light baflles extending along the vertical edges ofsaid reflectors, and a lamp between V the reflectors. v

10. A'lighting fixture comprising a sup-..

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porting element having depending end and side walls, pendent reflectors extending between the side walls and spaced from the top and end walls, light bafiles extending 5 along the vertical edges of said reflectors, and

a lamp between the reflectors.

11. A lighting fixture comprising a hollow supporting element that is open at its bottom, concave reflector plates depending from m the end portions of said element and spaced from the top and end walls thereof, and a lamp between said reflectors whereby direct and reflected light rays are projected through the unobstructed sides of the fixture.

Signed at Chicago, in the county of Cook and State of Illinois this 26th day of August, 1930.

JACOB L. STAIR.

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