US1453349A - Lighting fixture - Google Patents

Description

E. F. GUTH LIGHTING FIXTURE Filed May 29. 1920 mvmow ATTORNEY ill) j Patented are a nnwrn r. eu'rrr, tours, Mrssouer.

LIGH'IING FIXTURE.

Application filed May 29, 1920. Elerial N0. $555,360.

To (ill echo-m may concern:

Be it known that I, .l'finwm F. (turn, a citizen of the United States oi America, re siding at the city of tilt. Louis, State 0t Mis souri, have invented a certain new and use- :ful Lighting ll iirture, ot which the following is such a full, clear, and exact description 5; will enable any one skilled in the art to which it apperuns to make and use the 1 represl-mts an opaque and preferably parabolic reflector enclosing the light source 52.. In the term shown the reflector is sup ported from the lamp socket but it may, of course be supported in any other suitable manner. 3 is a. plate of translucent material, nreterably dillusing; glass, suspended beneath the reflector opening and of larger diameter than said opening. The central portion ct this plate is cone shaped with the apex of the cone upward and the outer part is in i the form oi? an upwardly inclined flange, whereby a. portion oil the reflected light from the source is reflected oiuzwardly, a part of it passing; between the plate and the lower edge of the reflector and a part cl. such ofsaid reflected light as is interce .)ted

by the outer flange portion of the platelbeing reflected upwardly to light the ceiling in the vicinity of thefixture support and thus prevent the formation eta shadow of the upper part of the fixture on the ceiling. Another function of the cone shape ar- .rangement of the central portion oi the plate is that the most highly illuminated portion oi the plate, which of course is the central portion is not in view when the fixture is observed from the usual angles and the appearance of the fixture when used for lighting; is better than it some of the observable portions thereof were more brilliantly illun'iinated than others.

.lln my fixture all of the visible light is diffused and the brilliancy of the illuminated iioi'tions oi the fixture is low while at the same time the total light off the source is controlled and transmitted in an efiicient manner. The parabolic I'BllQCtOIfilTl'lltS R tlected rays in parallel lines and the distribution of these rays is to a large extent controlled by the inclmatlon of the conical suri'ace oi: the central portion oi the dii'l'usinp; plate.

by preferable construction the parts will be so assembled that the upwardly inclined flange of the diffusingmember will extend above a straight line passing through the light source and the lower edge of the retlector.

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 areflector enclosinnsaid source and opening downwardly, a

light reflecting and diffusing member positioned beneath and spaced from the reflector opening and of greater diameter than said opening, said diffusing member having its central portion coneshaped and its outer portion in the form of an upwardly inclined flange.

in a lighting fixture the combination with a source of light of a reflector enclosiiurjsaul source and open ng downward a l ght reflecting and diffusing: member positioned beneath and smced from the reflector opening and of greater diameter than said opening, said diffusing" member having 1 central. portion cone shaped and its outer portion in the form of an u 'iwardly inclined flange extending; above straight lines passing through the light source and the lower edge of the reflector.

in testimony whereof, Ihave hereunto set my hand and allixed my seal.

EDWIN F. GUTH; [n s]

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