US1394319A - Headlight-reflector - Google Patents

Description

C. A. McNEAL.

lHEADLIGHT REFLECTOR. APPLIcAnoN FILED 1AN.15.|920.

11,394,319, Patented Oct. 18, 1921.

UNITED STATES PATENT OFFICE.

CHARLES A. MCNEAL, OF COLUMBUS, OHIO, ASSIGNOR OF ONE-HALF TO FREI) EARL FULLER, OF COLUMBUS, OHIO. v

HEADLIGHT-REFLEGTOR.

Specification of Letters Ilatent.Y

Patented Oct. 18, 1921.

l Application led January 15, 1920. Serial No. 351,551.

State of Ohio, have made a certain new and useful Invention in Headlight-Reflectors; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the mvention, reference being had to the accompanying drawings, and to letters or fi ures of reference marked thereon, whic form a part of this specification.

Figure 1 is a central cross Section of the invention.

Fig. 2 is a face view of the same.

Fig. 3 shows a detail edge view and a detail perspective view of one of the reflector sections.

The invention -has relation to' headlight reflectors, for automobiles, or for use whereever a headlight would be needed, and has for its object to provide an improved reflector wherein glare will be eliminated and the field or cone of reflected light will be made up of elements or rays equally distributed or appearing as equalized throughout the same, or whereb the field of reflected light thrown upon tlsie roadway will appear equally illuminated throughout.

The invention consists in the novel construction and combinations of parts, as hereinafter set forth.

In the accompanying drawings illustrating an embodiment of the invention, the numeral 2 designates the reflector of concavoconvex form, and whereon are set, fixed or molded, or wherein are stamped a plurality of or multiplicity of plane- surface reflector sections 3, 3, covering the entire surface of the reflector and forming the reflecting surface thereof by suitable adaptation. These reflector sections are res ectively of comparatively small size and) are arranged in annular series. The sections as shown are polygonal in form and interfitting.

The sections 3, 3, are arranged respectively or individually at the proper an le to reflect the rays of light from a lig t Source or bulb 4, located at the focal point approximately of the reflector, to form a field of reflected light or a cone of light, the upper limit of which will lie below the eyes of an approaching driver and the lower limit of which will lie upon the roadway sufficiently close to the headlight to properly illuminate the road, this being accomplished by giving each individual reflector section 3 an inclination with respect to the axis of vthe reflector which will differ from that of the remainder of the reflector sections or any one of said remainder. Thus the angle of incidence of a ray of light made with each unit will be different from that made with any other one in a section taken in a plane perpendicular with the axis of the reflector.

The reflector sections 3, being arranged as stated, will diffuse the rays of light reflected therefrom, whereby the field or cone of reflected light will have the elements or rays thereof appearing as equally distributed or substantially equalized throughout the same, thereby avoiding the formation of a central bright spot of reflected light and alternate light and dark rings surrounding said spot, upon the roadway, andV which are unavoidable in the concave or parabolic reflector as adapted for use as a headlight. In practice the concave or parabolic reflector so adapted for headlight use, throws out a cone of reflected light, which is so positioned as to throw a glare into the eyes of an approaching driver, and into the eyes of a driver of a passing car going in the opposite direction, and applicant by the use of the reflector sections arranged as stated, avoids this glare, Owing to the comparatively small area of each reflector section, the diffusion of the reflected light rays incident thereto, will be limited, but will be sufficient to break up the aforesaid central bright spot and the light and dark rings surrounding said spot, and equalize the illumination.

. I claim:

A headlight reflector of concave form, made` up of a multiplicity of plane units angularly related to each other, said units being individually of comparatively small size and each having an inclination with respect to the axis of the reector differing In testmon whereof I ax'my signature froml thathof aly other unit, sad unilts disin presence o two witnesses. ose in t e re ector so as'to re ect t e ra s Ef light from a Acommon source located t CHARLES A' MQNEAL 5 the focus of the reflector downwardly and Witnesses:

forwardly in a substantially definite cone of J. L.l BACHMAN, equally distributed light rays. LEE F. JOHNSTON.

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