US1363919A - Lighting-fixture - Google Patents

Description

G. F. ROBINSON.

LIGHTING FIXTURE.

APPLICATION FILED APR. 3. 1920.

I 0 1 N m o n 2 L M .e m 02 V m B m a D...

G. P. ROBINSON.

LIGHTING FIXTURE.

APPLICATION FILED APR. 3, 1920.

Patented Dec. 28, 1920.

2 SHEETS-SHEET 2.

Hi6 A TTO/M/EYS UNITED STATES PATENT. OFFICE.

GROSVENOR 1. ROBINSON, OF SUMMIT, NEW JERSEY.

LIGHTING-FIXTURE.

T 0 all whom it may concern:

Be it known thatI, GRosvENoR P. RoBIN- soN, a citizen of the United States, residing at Summit, in the county of Union and State of New Jersey, have invented an Improvement in Lighting-Fixtures, of which the following is a specification.

My invention relates to lighting fixtures of the semi-indirect character, particularly ceiling fixtures.

In fixtures of this kind high efficiency incandescent lamps are employed, and in such fixtures generally in use the lamp is hung in a position above the translucent bowl and surrounded by a reflector which directs the light upwardly upon the ceiling which again re-directs the light downwardly. Many ceilings are very poor reflectors. The object of my present invention is to provide a lighting fixture of such construction that the relative positions of the lamp, bowl, and reflector or reflectors are such that the light from the lamp strikes both the inner and outer surfaces of the reflector or reflectors, whereby the light is not only reflected upwardly against the ceiling, but is also reflected laterally, therebygreatly increasing its efiiciency, while at the same time the filament is hid from direct view,.and the light blended in such manner that any unpleasant or injurious effect uponthe eyes of the beholder is eflectually prevented.

The details of the invention are hereinafter particularly described.

In the accompanying drawings Figure 1 is an elevation, partly in section,

showing a lighting fixture embodying my invention.

Fig. 2 is a plan view of the same, partly broken away.

Fig. 3 is an elevation, partly in section,

showing the employment of a single reflector.

Fig. 4 is a plan view of the same, partly broken away, and

Fig. 5 ilustrates a modified form of support for the reflector.

Similar reference numerals indicate like parts in all the figures.

The lamp socket 10, is supported from the ceiling, or outlet box therein, in any desired Specification of Letters Patent.

Patent-ed Dec. 28, 1920.

Application filed April 3, 1920. serial-No. 370,967,

more shallow than the bowls usually emplolyed 1n fixtures of this character.

hlS bowl may be hung by any suitable means, but I prefere to support it from the socket cover by a common harp or frame .com rising a plurality of spaced Wire arms 14 preferably three) the upper ends of whlch are secured to the socket cover by rivets 15, as shown, or in any other suitable manner. These arms are bowed outwardly at thelr center to clear the lamp, and their lower ends are secured to a disk 16, provided with a centrally depending screw threaded lug 1 7, which extends through an opening provided in the center of the bottom of the translucent bowl 13, for that purpose. 18 1s a nut provided. with a flange 19 which nut 1s screwed upon the end of the threaded lug l7, exterior of the bowl. If desired, a washer 23, may be employed between the disk 16 and bowl 13.

22, indicates a reflector preferably of metal, open at the top and having a circular opening in its bottom of a size to surround the hanger arms 14, at their bowed centers. This reflector is substantially saucer-shaped and its upper part is of slightly larger diameter than the upper part of the bowl 13. In order to carryout my invention it is important that this reflector be so positioned relatively to the lamp that its bottom cuts or divides the light emitted by the lamp in such manner that the light from the lamp strikes both the outer and inner surface of the reflector, whereby the light will be reflected both laterally and upwardly.

20, denotes a rin L shaped in cross section which surrounds t e wire arms 14, at their bowed centers, said ring being secured to the respective arms in any suitable manner, preferably by rivets as shown.

It will be noticed that this ring 20, is positioned with respect to the bowl 13, so that its flange 21, or horizontal portion is slightly below the top edge of the bowl and forms a seat for the reflector, bringing its bottom on a line with the center of the lamp filament.

24, denotes another circular reflector,

I preferablyjof metal, of appreciably larger dimensions than the reflector 22 and somewhat flared or spread at its upper part. This reflector 24, is open both at the bottom and top; the bottom being of somewhat smaller circumference than the top of the reflect0r22, and positioned level therewith. It is supported in such fixed relative pos1- tion by a pluralit of spaced llnks or connecting strips 25, preferably three). These links are preferably metallic strips, one end being secured to the reflector 22, 1ns1de thereof, extending vertically above its top and then bent horizontally with the other end secured to the reflector 24, on its inner surface. These links may be secured to the respective reflectors in any suitable manner, but I prefer to emgl oy rivets 26 for that purpose, as shown. he links or connecting members may also be of any other suitable shape'or material. r

Both the outer and inner surfaces of the reflectors are preferably painted or coated with white enamel.

In consequence of the relative positions of the reflectors, lamp and bowl. the light from the lamp strikes both sides of the reflectors whereby the light is not only reflected upwardly, but is also reflectedlaterally, the filament being at the same time hid from direct view, and the light blended in such manner than any unpleasant or injurious effect upon the eyes of an occupant of the room in which the fixture is hung, is effectually prevented, while the full efliciency of the lamp is utilized and the light augmented.

In some instances, it may be desired to make use of a single reflector as illustrated in Figs. 3 and fl:-

In such case it is preferable to niake the reflector 27, of substantially the same shape and dimensions as the reflector 24, shown in Figs. 1 and 2, except that it is of somewhat greater depth, the opening; in its bottom being of a diameter to surround the bowed portions of the arms 14, and seat upon the flange 21, of the rin 20, (or upon the angle pieces 28,where suc devices are employed,) whereby the bottom of such reflector will cut or divide the light in the same manner as is done by the reflector 22, and with the same result.

By the employment of my invention, all the light emitted by the lamp is freely distributed without. thelam being visible, and there is no ossibility 0 any unpleasant or injurious e ect upon the eyes of a beholder.v

I claim as my invention 1. In a lighting fixture, the combination of a lamp and socket therefor, a socket cover, a bowl, arms secured at their upper ends directly to the socket cover and at their lower ends to the bowl within the same at its center for supporting said bowl, an upwardly flaring reflector provided with an opening in its bottom, and an angle-piece secured to each of said arms for supporting the reflector with the edge of the opening in its bottom in a line through the center of the lamp' filament whereby the light impinges upon both sides of the reflector.

2. In a lighting fixture, the combination of a lamp and socket therefor, a socket cover, a bowl, arms secured at their upper ends directly to the socket cover and at their lower ends to the bowl within the same at its center for supporting said bowl, an upwardly flaring reflector provided with an opening in its bottom through which said arms extend, and an angle-piece secured to each of said arms on a line through the cen' ter of the lamp filament and upon which the edge of the opening in the bottom of the reflector rests.

Signed by me this 31st day of March,

G. P. ROBINSON.

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