US1471710A - Nonglare reflector for headlights - Google Patents

Description

Oct. 23,, 1923.

I "r. B. SHANAHAN .NONGLARE REFLECTCR FOR HEADLIGHTS Filed Jan. is; 1921 I gy mfroxi @1247 ATTORNE YfiL Patented on. 2a, was.

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NONGLARE REFLECTOR FOR HEADLIGHTS.

Application filed January 15, 1921. Serial No. 437,547.

resident of-Rochester, in the county of Monroe and State of New York, have invented a certain new anduseful Nonglarc Reflector for Headlights, of which the following is a specification.

This invention has for its object the pro duction of a non-glare reflector for headlights of motor vehicles which is particularly simple in constructiomeconomical in manufacture and highly eflicient and durable in use and it consists in the novel fea: tures hereinafter described and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a face view of this reflector.

Figures 2 and 3 are sectional views taken respectively on lines 22, and 33, Fig.1.

Figure at is a rear elevation of this attachment, the same. being shown as applied to the lamp.

Figure 5 is atransverse sectional View through a headlight provided with my invention.

This non-glare reflector for headlights comprises a member which is concave and spherically curved in two directions, the arcs of the concavity being of different radii in lengthwise and transverse directions whereby the reflector is longer than it is wide and the are of the longest lengthwise curve is greater than the are of the longest transverse curve so that the reflector is composed of. substantially upper and lower spherical sections of like curvature and an intermediate zone of a different spherical curvature in a direction lengthwise and /,(h'oss\vise of the reflector.

1 designates the reflector which is longer from its upper to its lower end than' between its sides as shown in Fig. 1.'

As seen in Figs. 2 and 3, the arcof the greatest lengthwise curve midway between the sides of the reflectoris greaterthan the arc of the transverse curve, Fig. 3, midway between the ends of the reflector although the edge 2 of the reflector is in a plane. The differences in these curves provide a reflector which has upper and lower sections 3. 4; and aninterinediate zone 5 defined in Fig. l by dotted parallel lines, this zone also being bounded/at its ends by the parallel edges 6 of the reflector.

The upper section 3 is formed with an opening 7 therein for receiving the plug 8 f an incandescent electric lamp 9.

When the lamp is in position-the parallel portions 6 of theedges come close to the sides of the lamp and hence do notcutoff therays of light from the greater portions of the main parabolic reflector 10 of the headlight while the section 4 extends comparatively far under the lamp 9 and increases in distance away from the lamp or .filament between the parallel portions 6 of the edges and the lower end of the reflector and'hence cuts off the greater portion of the lower section 10 of the parabolic reflector of the headlight so that rays of light are not reflected upwardly by this section 10 into the eyes of pedestrians. I am aware that there are other non-glare attachments which in some respects are similar to this but I have found that a reflees tor f the form here shown and described produces the best results and at the same time gives a maximum light where the light intermediate zone of different spherical curvature thamt-he end zones and the upward forward edge'of. the spoon being inclined downwardly and forwardl on opposite sides of the bulb in a plane intersecting the axis of the reflector, the spoon being provided with an opening near one end for receiving the lamp base, substantially as and for the purpose described.

In testimony"whereof,

I have hereunto signed my name at Rochester, in the county of Monroe, and State of New York, this 12 day of September, 1920.

THOMAS BURTON SHANAHAN.

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