US1484138A - Light diffuser - Google Patents

Description

Feb. 19 1924. 1,484,138

A. E. LEAVER LIGHT DIFFUSER Filed Oct. 17. 1921 Patented Feb. 19, 1924.

PATENT OFFICE.

ALBERT E. LEAVER, OF CHICAGO, ILLINOIS.

LIGHT DIFFUSER.

Application filed October 17, 1921. Serial Io. 508,188.

To all whom it may concern:

Be it known that I, ALBERT E. LEAVER, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Light Difi'user, of which the following is a specification.

.My invention relates to'difi'users or dimmers for automobile headlights and particularly to a simple device which may be applied to headlights commonly in use.

One of the objects of my invention is to provide a dimming device adapted to col lect the rays from'an electric lamp and distribute the rays in Such manner as to eliminate glare and at the same time so as to prevent the loss or dissipation of the light. The desired result is secured by providing a surrounding series of vanes flaring outwardly from a point near the rear of the globe, the vanes being spaced apart and overlapping and preferably being composed of reflecting material; that is, material having a polished or silvered surface. The light rays projected against the angularly disposed vanes are reflected onto the back of an adjacent vane thence on to the parabolic reflector at such an angle of incidence as to prevent concentration of the rays at the usual focal point. Thus all the light is conserved and the lare is eliminated.

The invention Wlll be more readily understood by reference to the accompanying drawings, wherein,

Fig. 1 is a front view of a dimmer constructed in accordance with my invention, the same being shown in its proper relation to a headlight reflector;

Fig. 2 is a side view thereof, and,

Fig. 3 is a view of the blank from which the device is preferably constructed.

In the drawings it will be seen that the device comprises a circular sheet of material which is slitted along the lines 10 of Fig.3. It is then spun or otherwise shaped to provide a socket 11, which may be slitted as at 12, to provide for slight expansion in passing over the shank of a bulb or socket within which the shank is retained' The socket 11 is in the construction shown, integral with a concave portion 13, the inner surace of-which may form a reflector for collecting rays thrown backwardly from the globe indicated at 14, such rays being thrown directly forward. Integral with the reflector portion 13, are the vanes, which as best shown in Fig. 1, are spaced apart and.

are overlapping relative to a radial line from the center of the globe. The vanes are preferably in the form of planes and are flared from the inner to the outer ends thereof, the extent of the flare being controlled by the desire of the user for a small or large area of difl'used light. The inner surface of the device will preferably be polished or silvered and the light rays will be properl reflected in accordance with the laws of re ection. It will be understood, however, that the exterior surface of the vanes will likewise be polished in order that the rays thrown from the front face of the vanes shall be caught on the rear face and thrown onto the parabolic reflector indicated at 16.

Obviously the exact form of the dimming device is immaterial and modifications may be made therein without departure from the spirit of my invention.

I claim: 1. A dimmer for headlights composed of a section of metal providing means for attachment to a bulb socket, and vanes, saidvanes being in the form of planes arranged in overlapping relation, both the inner and outer surfaces of said vanes being polished for the reflection of light.

2. In alight diffuser, the combination of a shank adapted to engage with the socket of a light bulb, a reflector, and angularly disposed overlappin light reflecting spacedapart vanes, both t e inner and outer surfaces of said vanes being polished to reflect light.

- Signed at Chicago, Illinois, this 14th day of October, 1921.

' ALBERT E. LEAVER.

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