US1583768A - Headlight - Google Patents

Description

I M. ALBRECHT May 11 ,1926.

HEADLIGHT Filed Oct. 12, 1925 lNl/E/VTOR Patented May 11, 1926.

v MATHIAS ALBRECHT, F HOMESTEAD, PENNSYLVANIA.

HEADLIGHT.

Application filed October 12, 1925. Serial No. 61,918.

My invention relates to reflectors for head- I lights. I have made practical application of it to headlights for automobiles, and in that application I shall show and describe it.

a Fig. 1 is a view in plan from above of a reflector for an automobile headlight, embodying my invention. Fig. II is a view of the same reflector in front elevation, And Figs, III, IV, and V are views in axial section, on the planes indicated. at III--III,

IV-IV, and V-V, Fig. II.

The reflector is made of metal casting, ordinarily of sheet steel. It is essentially paraboloid in shape, and, when finished,

the inner surface throughout all its extent is rendered in highest degree light reflect- Ihe general paraboloid shape is modified, to the end that there shall be minimum dispersion of light vertically, and restricted dispersion laterally. On vertical plane (Fig. III) the spread of the parabola is at a minimum; on horizontal plane (Fig. IV) the spread though somewhat greater is still relatively narrow; and on oblique plane (Fig. V) the spread is widest. Viewed in front elevation (Fig. II) the reflector accordingly assumes the shape of a rectangle with rounded corners, Wider than it is high.

Additionally, the paraboloid, modified in shape as-already indicated, is further modified by the truncationat 1, adjacent the margin and on the upper side, by a plane which extends parallel With the axis.

As is usual the source of light, ordinarily an incandescent electric lamp, is placed. approximately at the focus of the paraboloid, or, stated more accurately, the light-emitting element is so placed that the focal point the paraboloid lies within its extent,

of It will be understood that any preferred source of light may be employed.

Employ ing a reflector so shaped, the shaft of emitted light may be directed to illuminate brill iantly a clearly defined area of roadway in front of the car, but an area I so limited that there is no blinding effect upon wayfarers passing by nor upon drivers of approaching cars,

is need th at the time when there at-their vision be unhindered.

The reflector may be used elsewhere than on automobiles,on railroad locomotives, for example, and on street cars, etc.

I claim as my invention:

A headlight reflector of essentially paraboloid form which on axial and vertical plane is parabola, shaped to bola,- and shaped to a narrowly spreading on axial and horizontal plane is a more widely spreading paraon axial and oblique plane is shaped to a still more widely spreading arabola, upper p'or the reflector being provided in its tion with a horizontal surface extending from the edge rearwardly.

In testimony whereof I have hereunto set my hand.

MATHIAS ALBRECHT.

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