US1141361A - Lamp-shade. - Google Patents

Description

w. SCHMIDT & P. MULLER.

LAMP SHADE. APPLICATION FILED rB.21. 1913.

Patented June 1, 1915.

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THE NQRRIQ PETE/ ,5 CO, PHOTO-LITHO, WASHINGTON. D. C.

UNETE sra ras Parana orrioa WILLY SCHMIDT, OF FRANKFORT-ON-THE-MAIN, AND PAUL MULLER, 01E DORTMUND, GERMANY, ASSIGNOR-S TO Gr. SCHANZENBACH & GO. G. M. B. H., OF FRANKFORT-ON THE-MAIN, GERMANY, A FIRM.

LAMP-SHADE.

iaison Application filed. February 21, 1913.

To all whom it may concern:

Be it known that we, WILLY SCHMIDT and PAUL Mi'iLLER, citizens of the German Empire, residing, respectively, at Braunheimerlandstrasse 16, Frankfort-on-the-Main, and at Unionstrasse N. 105, Dortmund, in the Kingdom of Prussia, Germany, have invented certain new and useful Improvements in Lamp-Shades; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap ertains to make and use the same.

ur invention relates to a lamp shade and has for its object to provide a lamp shade or reflector, which will utilize every ray of light, hide the source of light from the spectator, and which may be formed to suit the intensity of the light with which it is to be used.

Reflectors which hide from the spectator the source of light, formed after the fashion of a Venetian blind of triangular or trapezium-shaped prisms are well known, and we are aware that it has been proposed to cover the outside of a glass globe or reflector having a smooth interior, with prisms adapted to distribute the light in given directions, and having the prism surfaces so arranged that the surface from which the light last leaves is approximately at right angles to the rays from the reflecting surface and we make no claim to such constructions. Such reflectors are of such a kind that besides the direct light reflected, indirect light is sent outward between the prisms because of the mutual reflection, and some of the direct light is lost or absorbed. These reflectors have'not been laced much on the market, because of the difliculty in cleaning, the danger of breakage which accompanies the cleaning, and because of the loss of light by absorption.

The invention will now be described with reference to the accompanying drawings, in which- Figure 1 represents the new lamp-covering seen from below. Fig. 2, the lower half of a lamp-covering seen from one side. Fig. 3, a cross-section of thelamp:cover1 ng. Fig. 4, the lamp-covering wlth twlsted r bs.

The lamp shade embodying our lnventlon Specification of Letters Patent.

Patented June 1, 1915.

Serial No. 749,955.

consists of a shade formed with a series of corrugations radiating longitudinally from a common center, said center being preferably 1n line with the axis of the source" of llght. Each corrugation or rib consists of two plane sections arranged at an angle to each other, one section a, being made of translucent material, such as frosted glass, while the other section b, is made of transparent material, such as clear glass, the corresponding sections of each rib being translucent or opaque.

The translucent sections are arranged at an angle to the light rays of less than 90,

the size of said angle depending upon the degree of intensity it is desired to transmit the light to the outside of the globe; the transparent sections Z), are set at such an angle to the translucent sections that all light reflected back from the translucent sections will fall vertically upon the transparent sections and pass directly therethrough to the outside of the globe. If it is desired to greatly decrease the intensity of the light the flutes or ribs may be curved or twisted, thus still further deflecting the angle to the light rays. (Fig. 4).

It will thus be seen that by the use of this shade, no direct rays of light will pass to the outside of the globe, some of the light rays being reflected back and passing through the clear glass, while any rays which are not reflected will pass through the translucent glass but will be scattered thereby before they pass through.

Having thus described our invention what we claim as new and desire to secure by Letters Patent of the United States is:

1. A lamp shade consisting of a series of ribs, each rib comprising two connected sections arranged at an angle to each other, one of said sections being composed of translucent material and being arranged at an angle to the light rays, and the second section being arranged at such an angle to the first mentioned section, that all light rays reflected back from the first section will fall vertically upon the second section, substantially as and for the purpose described.

2. A lamp shade consisting of a series of connected ribs radiating longitudinally from a common center, each rib consisting of two posed of translucent material and the other to 'vertically upon the said second section, sub- 10 stantially as and for the purpose described.

In testimony whereof We affix our signatures in the presence of two Witnesses. V

WILLY S OHMIDT. s] PAUL MULLER. [L. s] Witnesses: s V FRIEDRICH CARL WENVTZEL,

MAX HERMANN HoPPN m connected sections arranged at an angle each other, one of said sections being comof said sections being transparent; the said first mentioned section being arranged at an angle to the light rays and the said second section being arranged at such an angle to the first mentioned section that all light rays reflected back from the first section Will fall G'opies ofthis patent may be obtained for five cents each, by addressing the Commissioner .of fatents,

. Washington Difi'. r

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