US1257222A - Reflector for lighting units. - Google Patents

Description

E.F.GUTH.

REFLECTOR FOR LIGHTING UNITS.

APPLICATI N INVENTOR A TTOR/VEY Patented Feb. 19,1918.

UNITED STATES PATENT OFFICE.

EDWIN F. GUTH, OF ST. LOUIS, MISSOURI, ASSIGNOR TO LUMINOUS UNIT 00., OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

REFLECTOR FOR LIGHTING UNITS.

Application filed May 18, 1916.

To all whom it may concern:

Be it known that I, EDWIN F. Gu'rH, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented a certain new and useful Improvement in Reflectors for Lighting Units, of which the following is a specification.

My invention relates to that class of lighting units which is described in my Patent, Number 1,07 6,418, issued October 21st, 1913.

It is customary in using lights ofthis character, where the ceiling is very high, to suspend the'same by means of chains or other suspension means'some distance down from the ceilin This causes the reflector to throw a sha ow upon the ceiling, which produces a disagreeable eflect upon the observer.

My invention has for its object to provide a construction which will entirely obviate this, and will provide means for diffusing the light upon the ceiling and thus eifectively doing away with the marked shadow lines thereon.

I am aware that glass reflectors have been used for this purpose, but they are extremely ineflicient owing to the fact that such a large amount of the light flux either passes through or is absorbed by the glass, whereas in my invention, I only permit suflicient amount to pass through to dissipate the shadow effect without seriously impairing the efficiency, as the greater part of my reflector is formed of opaque material.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings, which are hereunto annexed and are a part of this specification, in which:

Figure l is a side elevation of a lighting unit, the reflector thereof being partially shown in section to show my improvement which is applied thereto Fig. 2 is a bottom view of the reflector.

Similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawings, 1 is the reflector which is suspended by means of chains 2, from a canop 3, which is secured to the ceiling indicate by the line 4. The light bulb 5, is supported in the center of the reflector 1, and extended downwardly into a bowl 6, which is preferably formed of translucent glass.

This bowl is supported by three suspend- Specification of Letters Patent.

Patented Feb. 19,1918.

Serial No. 98,292.

ing members 7. The bottom 8, of the reflector 1, is formed of suitable material to reflect the light rays downwardly as indicated by the lines when they are thrown back upon it from the interior of the bowl 6.

Inthe bottom 8, of the reflector 1, I form a plurality of openings 9, which may be of any number to secure the desired result. Above these openings I place a piece of whlte opal glass 10, as clearly shown in the sectional view of the reflector. Although I have described white opal glass for this purpose, it will be obvious to persons skilled in the art that any material which will present a reflecting surface, which will permit the passage therethrough of a portion of the light which is thrown upon it, will answer the purpose.

By spacing these openings 9, around in various parts of the reflector, it .has the eflfect of diffusing the light rays upon the celling, as clearly indicated by the lines in Fig". 1, thus effectively doing away with the marked shadow lines thereon.

Although I have shown a specific form of reflector, it is apparent that my invention is not limited to any particular form nor to any specific construction, as any reflector which is formed of material, the surface of which will reflect the light rays, but which is sufficiently transparent to permit a portion of the light rays to pass through so as to dissipate the marked shadow lines in the ceiling, will fall within the spirit of my invention.

I do not wish to be understood as limiting myself to the construction shown in the drawings, which are furnished merely for illustrative purposes, nor to my description except as such limitations shall appear in the hereinafter contained claims.

Having described my invention what I regard as new and desire to secure by Letters Patent is:

1. A reflector for lighting units formed of opaque material, the reflecting surface being substantially flat and finished in depolished white enamel, there being a plurality of openings in said reflecting surface, said openings being covered with white opal glass sufficiently dense to reflect a portion of the light rays, but which is sufficiently translucent to permit a portion of said rays to pass through so as to dissipate the shadow lines in the ceiling. the area of said openings being of such size as will not materially decrease the eficiency of the reflector.

2. A reflector for lighting units-formed of opaque material, the reflecting surface being substantially flat and finished in depolishecl white enamel, there being a plurality of openings in said reflecting surface, said openings being covered with white opal glass sufliciently dense to reflect a portion of the light rays, but which is sufficiently 10 In testimony whereof I have signed the 15 foregoing specification.

EDWIN F. GUTH.

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