US1691662A - Automobile headlight - Google Patents

Description

Ndv. 13, 1928.

C. A. MICHEL AUTOMOBILE HEADLIGHT 1 Filed Feb. 13, 1925 4o ification I have shown one embodiment of my I 45 the reflector Fig. 2 is a face view of the reflec- PatentedNov. 13,1928. Ltflhfln entree stares onion i.

CLARENCE A. MICHEL, or CLEVELAND, onro,- assrenoiaro urn-n Moron time iirnnur ncrunrne COMPANY, or crnvntnnnyoi-zra-a conronerroi-i or" onro.

AUTOMOBILE "HEADLIGHTJ Appiica tion filed February 13, 1925. Serial .No; 8,881.

- This invention relates generally to 'autoapart, the focal point of the upper'half being moblle headlights and more particularly to arrangedjat the rear and the focal point of-the certain improvements pertaining to the lampv 1 lower half being arranged "forward of the and reflector whereby the driving conditions filaments,that is to say, the filaments are arare im ro d, ranged substantially between the two focal 60 In most automobile headlights as at present points. constructed a single filament lamp is arranged The upper half of the reflector is indicated centrally of the reflector and a single filament at F and the focal point'thereof at F" and the lamp usually of less candle power isarranged focal point of the section G is located at G.

10 near the top of the reflector. The central The lower portion of the lower half is of the 65 lamp is used for road driving while the upper Same curvature of revolution as the portion Gr 3 lamp is used for city drivingand when pass- 7 but is tilted downwardly approximately twov ing other automobiles upon the road. degrees as indicated by the dotted line H. Furthermore, in automobile headlights as This insures the downward reflection of the at present constructed it is common to emrays from either filament.

ploy a modified form of reflector or a modified In order to avoid formation of sharp angles 7 form of lens with the idea of preventing the by the intersection of curvatures of revoludisagreeable glare when meeting other autotions of different focal lengths and also to mobiles or pedestrians. Theseimprovements facilitate the manufacture of the one-piece re.- are serviceable at times and there are other flector, I provide transition surfaces between .75 times due either to the unevenness of the road I the sections F and as most clearly indicated or the movement of the automobile that they at M. v I are not serviceable. The lower filament C is the filament em- T he object of my invention is to add an eleployed for ordinary road driving and the top ment of safety to the present devices by emof the beam isv projected a considerable disploying a double filament lamp which is centancein advance of the automobile. When, trally arranged and in combination with a rehowever, the lower filament is extinguished flector so constructed that the top ofthe beam and the; upper one lighted the rays of light is projected forwardly within the legal limita will be perceptibly lowered, it being under- 30 considerable distance in advance of the autostood,'however, that when the lower filament mobile for road driving and for city driving is employedall of the rays of light are director while passing. other automobiles the top of ed either horizontally or below the horizontal the beam can be materially deflected or drawn but when the upper filament is employed all of downwardly so as to avoid all possibility of the rays are perceptibly depressed. p v 35 glare. In order to further safeguard the In order to give lateral distribution I pro- I matter I may use one of several types of repose to employ a lens L having vertical flutes fracting lenses in combination with the dou- L of uniform size and completely covering ble filament lampand modified reflector. the face of the lens. This form of lens is In the drawings forming a part of this specshown in Fig. 3. Other types of lenses can be employedin case further lateral distribution invention and in which Fig. 1 is a vertical sec or additional vertical deflection of the rays of tional view of a reflector andlamp constructed light should be desired. i I i and arranged in accordance withmyinvention It will thus be seen that'I provide a novel together with the lens arranged in advance of construction of reflector in combination with a double filament lamp with the filaments artor; Fig. 3 is a face view of one formof lens 'rangedto produce theresults desired. which can be used in connection therewith. I Having thus described my invention what In carrying out my invention I employ a I claim is V lamp Ahaving two independentlylighted fila- 1. In a light projector, the combmatlon 50 ments B and C, the filament B being arranged with a reflector, of alamp having two 1ndesubstantially on the axis D of the reflector E pendently lighted filaments one of said filaand the filament C is arranged a very short ments beinglocated on the axis of the'reflector distance below the filament B. The upper andthe other'one' below said axis, the upper and lower halves of the'reflector are of diiferand lower halves of said reflector having dif- 55 ent focal lengths,the focal points being spaced ferent focal lengths, the focus of the upper 7 half of the reflector beingiat the rear of the filaments and the focus of the lower half of the reflector in .front of said filaments, the

filaments being located intermediate the focal points, the lower portion of the lower half;

of said reflector being tilted downwardly whereby rays of light from either filament will be reflected downwardly.

'2. In a light projector, the combination of a reflector and a lamp having two independent- 'ly lighted'filaments one ofsaid filaments bemg located on the axis of the reflector and the v other filament below thesaid axis, the upper and lower halves of said reflector having dif ferent focal lengths the focal point of the lower half being in advance of the focal point of the upper half, the filaments being located intermediate the focal points, the lower portion of the lower half of the reflector being tilted downwardly whereby rays of light from either filament will be reflected downwardly,

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