US1620963A - Lighting fixture - Google Patents

Description

Marph 15, 1 E. F. GUTH LIGHTING FIX Filed July 5, 1921 WITNESSES: lNl/E/VTOR f V M 440; fkfaa" v BY ATTORA/EK -Patented 1 5, 1 927.

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menrme FIXTURE. a

Application filed July 5,

My invention relates to the art of illumination and has for its object to produce an etficient and practical enclosed lighting unit, adapted for controlling and varying the distribution and diffusion ,of the light rays within a certain determined radius on the working plane.

A further object is to producesuch a device in a simple and easily operated construction so that any user, although unskilled in the art, may adjust the reflector of my unit to secure the exact distribut on he desired. In other words, my improved lighting fixture is a unitary structure ready for installation in any place, and the ordinary'us er can adjust it to produce the exact lighting effect he may desire.

My invention consists of the arrangement and corelation of parts, as illustrated, de-

figure shows a view, largely in section, of my improved lighting unit.

*Referring to the accompanying drawings the reference numeral 10 is used to indicate the light source, orlamp, 11 the socket, 12

the shell surrounding the socket, 13 the bowl holder, which is securedto the shell, and 14 the bowl which surrounds the 1ight source and is removably secured to thebewl holder. A reflector 15, preferably of the conforma-- tion shown in the drawing, surrounds the light source, and is adjustably held in'position by rods 16,01 the like, extending upwardly therefrom and seated in the bowl holder. These rods arepreferably screw threaded 'on'one end and seated, in rotatingmountings secured in thebowl holder, This means of adjustably securing "the ,reflector 'may be varied without altering my invention, as the -only materiahfunction of th s part is to cause the reflector so mounted that it may easily and quickly adjusted by moving itlup. r down, at the desire of the user. 4 I My reflector is a very important element of my invention and is constructed with a scribed and claimed. In the drawing the A horizontal line. This makes it "me touse a very light density 0 glass in the bowl, and tests of my1u'nit, so constructed. performed to the highest degree in the efii- 1921. Serial No. 482,355.

narrow opening at the top, very little wider than the neck of the lamp to be used, and extends downwardly around the enlarged portion of the lamp and. flares outwardly to a limited extent, the preferable shape and construction being as shown in the drawing.

It is my purpose to have this reflector placed so that normally it will intercept all light rays above a 50 degree angle from the perpendicular though, of course, this can be, and will often be, varied at the desire of the user, for it is obvious the raising or lowering of the reflector will enlarge or diminish, as thecasemay be, the degree of light rays which will impinge thereon and cause the reflector to function to concentrate or more widely difluse the light as desired.

The reflector surrounding the lamp is of sufiicient depth to intercept all direct rays of light at an angle considerably below the racticalfor ciency of inclosed units.

Having thus described my invention, what I claim and desire to secure by Letters Pat-- ent of the United States, is:

a light source and -inclosing bowl and a reflector within the bowl, said reflector having an openingi'n itsfltop slightly larger than the neck of the light source and extenlflingdownwardly below the light sourceand flar- 80 ing outwardly so as to surround the light" source; said reflector being also mounted forfvgertical adjustment from the canopy oflthe xture.

2A lighting fixturecomprising-alight source and an enclosing bowl and a-reflectqrf within the bowl, said reflector surrounding; the flightsource and depending below the 5 same, "and-being alsoadjus'tably secured to. the fixture canopy, substantially as shown 0 and described.

1. A lighting fixture comprising a canopy,

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