US1476190A - Lamp shade - Google Patents

Description

Dec. 4 1923.

E. H. STRAUSS LAMP SHADE Filed March 18. 1920 6 INVENTOR. ama aifizfzws ZTT R A if.

Patented Dec, 4, 1923.

PATENT OFFICE.

ERNEST I-I. s'ranoss, or onrc'eeo, ILLINOIS.-

LAJEI? SHADE.

Application filed March 18, 1920; Serial No. 366,766.

2" 0 all whom it may concern:

Be it known that I, ERNns'r ii. STRAUss, a citizen of the United States of America.

residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Lamp- Shades, of which the following is a specification.

My invention relates to lamps generally, but particularly to lamps-at or in the direction of which it is sometimes necessary to look, and has for its objects the production of a shade and diffuser which will afford the maximum of light in a given direction, with a minimum of glare to the eyes upon looking at, or in the direction of the lamp, and at the same time be adequately ventilated.

I attain these objects by a device illustrated in the accompanying drawings, in which Fig. 1 is an elevation of the device in circular or square form, or of an end of the device in oblong form; Fig. 2, a cross-section of the same, showing several variants of the diffuser, and the source of the light in diagram; Fig. 3, a plan view of the diffuser in circular form; Fig. 4, a like view of an indefinite section in oblong or longitudinal form, Figs. 5 and 6, like views of termini of such forms, andFig. 7, a section of the device in one-piece form. The same reference characters refer to the same, similar or corresponding parts throughout the various views.

The device consists of a diffuser and a reflector, or reflector-shade, either separate or continuous, disposed on opposite sides of an electric bulb, or other source of light, the former comprising several ring or tubelike members of mat or frosted glass of varying length, but all relatively short, and so disposed about a plane, curved or angular middle member of the same material, and with reference to it, each other, and the source of the light, as to intercept all the rays emanating directly therefrom in the general direction thereof, said members being intersected and joined, preferably at right angles, and rigidly held in place by relatively slender links of clear glass, resulting, when viewed in plan, in a sash-like whole with relatively large interstices, openings or spaces between the intersections for the passage of reflected rays, and for ventilation, while the reflector or the reflectorsbade is a conventional canopy or inverted bowl or funnel of glass, metal or other suitable material, according to the effect'dcsired, with its inner surface silvered or otherwise treated so as to act as a reflector.

Referring to the drawings, A is the diffuser proper, A, A" and A being vari ants; B, the reflector and C, the shade. D, D and D represent the members of the diffuser that are mat or frosted, E, the connecting links, and F, the intervening spaces,

while Gr represents the source of the light.

It will be observed from a reference to the broken lines, my, (Figs. 2 and 7 ),that all rays of light emanating directly from the source, G, in the general direction of the diffuser, will be'intercepted by the frosted or mat members, D, D and D, and by them broken up and diffused, thus preventing all glare to the eyes upon looking at or in the direction of the said source; while most of the reflected rays, (the reflector being properly shaped and placedwith reference to said source), will pass unimpeded through the spaces and clear glass, E and F, affording the maximum of light in the general direction of the diffuser, as well as the desired ventilation.

If the source of the light, or the conditions of its use are such as to require its protection from the elements, or environment, or if desired for other reason, the interstices or openings, F, may be closed with clear glass, after the general manner of panes in a window-sash, as shown by the dotted lines, m, (Fig. 2), and at F, (Figs. 2 A, 4, 5, 6 and 7) and in such case, the links E, may be and generally are entirely omitted, and resort had to a form of diffuser such as is shown at A, (Figs. 2 and 7), in which F represents transparent or clear glass, serving both to connect and hold the frosted or mat parts in place and to closethe intervening spaces against wind and weather, and whatever foreign substances may be borne thereon or thereby.

If the reflector or reflector-shade is made of glass, it is preferably made continuous with the diffuser, or the outer member thereof, resulting in a one-piece unit or whole, as shown in Fig. 7.

Having thus described my invention, what i approximately parallel lines, and a diffuser sively larger but narrower vertical-walled surrounding members of translucent but not transparent material, concentricallymounted, and spaced from one another in approximately the same horizontal plane, to intercept and diffuse all rays emanating downward directly from said source, and afford relatively large and unimpeded passage for said reflected rays, andslender means spanning said spaces and firmly attached to said members to hold them in position, said spaces being otherwise'left open for such passage and for ventilation, substantially as described and shown.

2. In a lamp-shade, the combination with a reflector of such inner curvature as to reflect'the rays impinging thereagainst from an embraced source of the light in approximately parallel lines, of a diffuser comprising a central member, and aseries of vertical-walled surrounding members, of translucent but not transparent material, the latter being consecutively larger but of lower elevation, all said members being concentrically mounted and spaced from one another with their upper edges in approximately the same horizontal plane, to intercept and diffuse all rays'impinging thereupon directly from said source, and, at the same time, afford relatively large and unimpeded passage for said reflected rays, and slender -means of suitable material, spanning said ERNEST H. STRAUSS

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