US2304202A - Lighting fixture - Google Patents

Description

Dec. 8, 1942. H. K. PRAcHT LIGHTING FIXTURE Filed June 28, 1941' 2 Sheets-Sheet 1 INVENTOR 'HeJZZf Klracht .47: y

Dec. 8, 1942. H. K. PRACHT- LIGHTING FIXTURE Filed June 28, 1941' 2 SIge'e-t-Shget 2 INVENTOR HanryKPrachf Patented Dec. 8, 1942 I STATES 7 2,304,202

LIGHTING FIXTURE Henry K. Pracht, Irwin,

Pa., assignor to Pitts burgh Reflector Company, Pittsburgh, Pa., a corporation ofv New Jersey Application June 28, 1941, Serial No. 400,197

2 Claims.

In a preferred embodiment of the invention, it comprises The end caps are generally normal to the longitudinal axis of the fixture. The reflectors are positioned on a curve and are substantially equidistant from the axis of the fixture. By this arrangement, the central planes of the reflectors are generally radial relative to the fixture axis so that the reflectors throw light downwardly and outwardly over a substantial area.

If the fixture is suspended below the ceiling, as contrasted with a flush-type fixture, I utilize the supporting plate as a reflector and position tubular light sources thereabove for illuminating the ceiling.

A complete understanding of the invention will result from a consideration of the following detailed description thereof and reference to the accompanying drawings illustrating a preferred embodiment and a modification.

In the drawings:

Figure 1 is a view partly in side elevation and partly in longitudinal section showing a fixture according to my invention adapted to be suspended below the ceiling;

Figure 2 is a transverse section taken substantially along the plane of line IIII of Figure 1; and

Figure 3 is a view similar to Figure 2 showing a modification.

Referring now in detail to the drawings and, for the present, to Figures 1 15 received in channel 20 sides [9.

25 End caps 2| fixture. Each end cap overlies the ends of all the V 30 tially spaced straps (not shown).

45 tween the channel 10 and II. In the embodiment shown in Figures 1 and 2, the supporting channel serves also as a 'reflector, as will be described later. Its edges are bent upwardly as at l2 to provide a generally 5 trough-shaped reflector. Beyond the portions I2,

the edges of the plate are bent downwardly to provide suspending fianges'l3.

' A plurality of tro gh-shaped reflectors l4, four in the embodiment illustrated, are assembled 10 side-by-side and are supported on the inturned bottom edges l5 of the suspending flanges l3. The upper edges of the outer reflectors 14 are secured to the inturned edges l5 by screws-l6. The'adja'cent edges of the several'refiectors are strips I! which bind them tightly together. I

The particular reflectors M'illustrated have a flat bottom I8, plane sloping lower sides It, and plane outer edges disposed at an angle tothe the edges 20 of adjacent reflectors are in contact flatwise, as shown in Figure 2, the axes of the reflectors lie substantially in a cylindrical surface co-axial with the fixture as a whole.

are mounted at each end of the reflectors I4 and the supporting channel In. Each end cap includes a disc 22 and a ring 23. The disc and ring are connected by circumferen- The discs 22 are spaced inwardly of the rings 23 and are secured by bolts 24 to supporting straps 25 depending from the ends of the channel l0. By this construction, light rays passing between the edge of the discs 22 and the ring 23, from light sources to be described later, are reflected onto the exposed surfaces of the discs 22, thereby illuminating them and enhancing the appearance of the fixture.

A lower supporting channel 26 is secured to the outer reflectors l4 and ties all these reflectors into a rigid assembly. As shown, the flat botthe plate 26 is free to accommodate control auxiliaries or the like, indicated at 21, for the light sources.

Lamp holders 28 are mounted in each of the reflectors I4 near each end thereof and luminous tubes 29 are inserted in the holders. Similar holders are secured to the supporting channel l0 and carry luminous tubes adapted to throw light from each tube to be directed generally radially of the axis of the fixture whereby a uniform distribution of light below and on each side of the fixture is obtained.

The fixture described above, which is illustrated in Figures 1 and 2, is adapted for mounting below the ceiling. A modified construction shown in Figure 3 is adapted for mounting flush against the ceiling. In this form of the invention, the reflectors M are assembled in the same relation as shown in Figures 1 and 2 but are suspended from a supporting channel 10 which is substantially plane, having downturned flanges 13. The channel I is supported by any suitable hangers ll' dependingfrom'ceiling outletboxes. The fixture shownin Figure 3 includes end caps 2|, generally similar to those shown at 2|, except that they are segmental instead of circular. In other respects, the fixture of Figure 3 is similar to that shown in Figures 1 and 2.

It will be apparent that the invention is characterized by numerous advantages. In the first place, the fixture is highly attractive in appearance. It is adapted to provide substantially uniformly distributed illumination downwardly and laterally and, in one form, is provided with means for illuminating the ceiling. The fixture may be constructed at relatively low cost, utilizing standard parts to a large extent. A further advantage is that, when viewed from below, the fixture does not present any extensive areas which are dark, i. e., not illuminated by light from the tubular sources, except the rings 23 of the end caps which provide a pleasing contrast to the brightly illuminated remainder of the fixture. On the contrary, the fixture exhibits. a substantially uniformly bright appearance; as previously explained, even the ends of the fixture are illuminated, at least so far as the discs 2! thereof may be seen.

Although I have illustrated anddescribed but a preferred embodiment and a modification of the invention, it will be understood that changes in the arrangement or construction and parts may be made without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. An illuminating fixture comprising a channel, an assembly of trough-shaped reflectors disposed on an arc about said channel and extending parallel thereto, said reflectors having plane bottoms and s'des which are plane over at least a portion of their width, the outermost reflectors of said assembly having their bottoms in flatwise engagement with the sides of said channel and secured thereto, the plane portions of the sides or all said reflectors being in flatwise engagement with and secured to similar portions of the adjacent reflectors, a trough-shaped reflector above said assembly, means last-mentioned reflector and engaging the outermost reflectors of said assembly for supporting it, and a luminous tube disposed in each reflector.

2. An illuminating fixture comprising a channel, an assembly of trough-shaped reflectors disposed on an are about said channel and extending parallel thereto; said reflectors having plane bottoms and sides which are plane over at least a portion of their width, the outermost reflectors of said assembly having-their bottoms in flatwise engagement with the sides of said channel and secured thereto, the plane portions of the sides of all said reflectors being in flat-wise engagement with and secured to similar portions of the adjacent reflectors, a trough-shaped reflector "above said assembly, the edges of said last-mentioned reflector being bent down to engage the edges of said outermost reflectors and thereby support said assembly, and a luminou tube disposed in each of said reflectors.

HENRY K. PRACHT.

depending from said CERTIFICATE -OF CORRECTION;

Patent No. 2,50) .,202 December 8, 1914.2 7

HENRI K. PRACHT.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, first column, line strike out "pridinium, dimethyl-cyclohexyl-ammonium salts";

and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

si ned-am sealed this "19th day of January, A. D. 19%.

Henry Van Arsdale, (Seal) Acting Commissioner of Patents.

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