US 1440733 A
Description (OCR text may contain errors)
E. F. GUTHL LIGHTING FIXTURE.
FILED JUNE 29 1920.
4 NVIENITORI ATTORNEY Patented ulain. 2, 1923.
EDWIN F. GUTH, OF SI. LOUIS, MISSOURI,
menirme Application filed June 29,
To all whom it may concern:
Be it known that I,'Enwm F. GUT a citizen of the United States of America, residing at the city of St. Louis, State of Missouri, have invented a certain newfland useful Lighting Fixture, of which the following is such a full, clear, and exact description as will enable anyone skilled in the art to which it appertains to make and use the same,'reference being had to the accompanying drawings, forming part of this specification. i My invention relates to a lighting fixture,- its object being to produce a fixture wherein 15.the light source will be concealed; whereby the light will be controlled in a novel and eflicient manner and distributed over the working plane; and whereby a portion of the light from the source will be directed upwardly to illuminate the ceiling adjacent to the fixture to avoid the formation of the shadow of the fixture thereon. Further objects and advantages of my invention will appear from the following more detailed description.
In the accompanying drawings, Fig. 1 is a view partly in cross'section and partly in elevation of a fixture embodying my inven-. ti'on'and .Fig. 2 is a bottom plan view of one half of the prism plate forming the lower part of the fixture. 1 represents a reflector positioned around the light source 2, said reflector being opaque and preferably parabolic. In the form shown the reflector is supported from the lamp socket but it may of course be supported in any other suitable manner. Suspended beneath this'reflector by means of hangers 3 is a curved glass lens or plate 4 which is of 40 greater diameter than the reflector opening and the lower surface of which is in the form of a plurality of concentric prisms. The plate is' suspended a short distance beneath the lower edge of thereflector but in such position that all direct rays of light from the source not impinging on the reflector will be intercepted by the plate. The peripheral portion of the plate isso ositioned that a certain amount of light wi 1 be reflected upward-by it' and-toward the portion of the ceiling adjacent to the, fixture supporting means thus preventing the forming of shadows of the fixture itself upon the ceiling.
- to reflect downwardly FIXTURE.
1920. Serial No. 392,747.
The reflector is preferably parabolic whereby reflected light rays issuing from it are parallel and these rays upon passing area.
My improved fixture herein described, combines the advantageous features'of directing the greater portion of the light from.
the source downward and distributing it outward and over the working plane in an eflicient manner together with the feature of illumination of the ceiling around the fixture support. It can be very easily dis'as sembled for cleaning.
Having fully described my invention, what I claim and desire to secure by Letters Patent of the United States is:
1. In a lighting fixture, the combination with a source of light of a reflector adapted the rays impinging thereon, and a light-dflfusing plate'of larger diameter than therefiector, positioned beneath, and spaced from, the reflector, so as toprovide an open spacebetween the 'reflector and the periphery of the plate,
through which light rays will be redirected upwardly by-the plate,
2. In a lighting fixture the combination with a source of light of a reflector adapted. I
to reflect downwardl the rays impinging thereon,and a light dlfi'using plate of larger diameter than t e reflector, and partially spherical in conformation positioned beneath, and spaced from, the reflector.
3aIn' a lighting fixture the combination with a source of light of a reflector adapted to reflect downwardly-the rays of light imp nging thereon, and a light diffusing plate partially" spherical in conformation, positloned beneath, and spaced from, the reflector, said plate having concentric prisms.
tor, said plate having concentric prisms -of larger' diameter than the reflector, and
Q eee ee formed on the lower surface thereof, the ed from, and spaced from, the reflector, said prisms being formed with substantially right plate being partially spherical in conforma- 10 angular surfaces. tion, and provided with concentric prisms 5. In a lighting fixture, the combination formed on its lower surface.
I 5 with a source of light of a reflector adapted In" testimony whereof, I have hereunto set to reflect downwardly the rays of light immy hand and efiixed my seal. pinging thereon, emi e light difiusing plate of larger diameter than the reflector suspend- EDWIN F. GUTH. [11,. s.]