US1651984A - Headlight - Google Patents

Description

Dec. 6, 1927.

c. H. ALLEN ET AL HEADLIGHT Original Filed Nov. 15, 1924 v E c155 G'HA r) as 1% A llen6lenn 380mm):

' non glaring illumination is requiredwith a combination of near and far lighting effects.

Patented Dent), 1927. v f

h u h .s I 7 1,651,984- U E TIES; P N T" OF FIICE.

CHARLES HfALLEu Ann ennu s. sosnimmor 'onroaeo, ILLINOIS, Assmnons TO THEALLENLI'DEQOMEANY,OF-CHIGAGQ, innnvoisn' oonronnrriolv or ILLINOIS.

i 1 Application filed November 15, 1924, Serial No. 750,048. Renewed May 9, 1927.

Thisinvention relates to headlights for a front-surface of somewhat less radius automotive Vehicles and the like wherein --This invention is an improvement of that shown in Charles H. Allens application for source 7 comprises an electric bulb facing U. S. Letters Patent, Serial No. 655,169, filed August 2nd,1923. I

' It is an mportant object of this invention toprovide the combination of diffused rays of light for near illumination and'sconcentrated nearly parallel rays of light" for distant illumination with the entire absence of objectionable glare or stray rays of light in,

'porarily blinding him.

the eyes of approaching drivers or pedestrians. 7 r 1 Other and further important objects of thisinvention will be apparent from the dis-- closures in the drawings and accompanying specification. f s

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described. t

On the drawings: 1

Figure 1 is a vertical section of a reflector and lamp mounting embodying the features of this invention.

' Figure 2 is a frontelevation thereof.

As shown on the drawings:

The reference numeral 5 refers to a cylindrical shell supporting a lamp bracket 6 with a light source 7 located well below the center of the shell. As shown, the light rearwardly to obtain the full reflecting power of the lamp with the minimum' amount of direct projected rays of light. Preferably integral with the cylindrical shell is a spherical segment forming a back or closure 8 whose center '9 falls on a horizontal line through the light source. The low position of the light source gives the V 5 chord of the spherical segment a forward inclination. A polished reflector 1O is. arranged in the upper half of the spherical back, and due to the inclination of the back and the position of the light source inside the center of the reflector, the light rays reflected thereby will be downwardly directed and widely dispersed for. the purpose of illuminating the immediate surroundings below the level of the headlight.

A reflector 11 of the well known Mangin type. having a silvered rear surface of a curvature corresponding to the shell 8 has thereby forming a concentrating reflector adaptedto project nearly parallel horizontal rays ofjlight to illuminate distant objects. The Mangin reflector extends upwards only to .the: horizontal line through the light source, leaving a blank or nonreflect-ing surface 12 on the rear wallorgshell 8 extending from the edge of the lower reflector to the edge of the upper reflector,-in the zone that in an ordinary headlight produces most of the objectionable reflected rays of light, that would rise to'the height of an approaching drivers: or pedestrians eyes, thereby tem- .We claim as our invention: 1

'1. In alight projector, a casing, a light source facing toward said casing, a spherisource with respect to the foci and axes of said segments being such that the rays from the upper segment are projected downward while the rays from the Mangin segment are projected horizontally. w

2. Ina light projector, a casing embody ing a spherical back, a light source mounted along the horizontal axis of said back-and facing toward'it, a spherical reflector seg ment inthe upper portion ofsaid casing and fitting said spherical back with its lowerboundary edge above the horizontal plane passing through said light source, anda Mangin reflector segment in the lower portion of. said casing with its rear face fitting said back and having its-upper boundary edge in line horizontally with said light source, 110 portion of either segment extenddownward while the rays from'the Mangin 1 segment are projected horizontally.

3. In a light projector, a casing embody- 7 ing a spherical back, a light source mounted alongthe horizontal axis of said back and facmg toward it, a spherical reflector seg-' ment in the upper portion of said casing with its lower boundary edge above the horizontal plane passing through said light source. and a hflangin reflector segment mounted in the lower portion of said casing and having its upper boundary edge in line horizontally with 'said light source, the front edge of the upper reflector segment being in a plane at an angle to the transverse vertical plane paesing through the light source, the

front e of the Menp'in reflector segment Lmng s i antially parallel with said plane,

and the position of the light source with reepcrt to said reflector SOQEIIQHtS being such that the rays from the upper segment are projected downward while the rays troin the hilangin segment are projectedhorizontally.

=1. In a light projector. 21 casing comprising a cylindrical shell disposed horizontally and a spherical segmental back united to said shell at an upward and forward angle to the vertical, a lightsource supported by said shell substantially below the center of thelatter and in the horizontal line of the tion of said casing and having its; upper boundary edge in line horizontally with said light source the trout edge of the upper retleetor segment being in a plane at an angle to the tra lSVtil'SQ vertical plane passing through the light source, the front edge of the Mangin reflector segment being nubstantially parallel with said plane, andthe p0- sit-ion of the light source with respect to said reflector segments being such that the rays from the upper segment, are rejected downward while the rays from t .10 went are projected horizontally.

in testimony whereof, We have hereunto subscribed our names.

CHARLES H; ALLFN GLENN S. SOSEMA Ma ngin neg-

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