US1647613A - Headlight antiglare shield - Google Patents

Description

Nov. 1, 1927. 1,647,613

F. H. FREDETTE HEADLIGHT ANTIGLARE SHIELD Filed Dec. 30. 1926 INVENTOR ATTORN EY Patented Nov.l 1, 1927.

UNITED STATES Lauria PATENT OFFICE.

HEADLIGHT ANTIGLARE SHIELD.

Application led December 30, 1926. Serial No. 157,926.

This invention relates to devices for intercepting a definite portion of light rays as issuing from a head light to avoid a glaring effect at the front ofthe lamp and distribute such rays where more desirable.

The difficulty encountered in the use of ordinary head lightsis ofl common knowledge and many expedients have been devised to avoid the blinding effects of such lamps, none of which have proven wholly satisfactory, due to failure in actual operation, heavy initial expense in installation and other causes incidental to their construction.

It is therefore one of the objects of the present invention to provide a shield in the form of' an attachment to any of the ordinary types of head lights whereby the light rays are positively prevented from emanating through the central front portion of the lens thus precluding a blinding effect.

It is a further feature to produce a shield arranged to vreflect such rays back against the parabolic reflector .usually employed whereby their eventual emanation is directed mainly downward to illumine the path of a vehicle in a desirable manner.

Another object is in the provision of a shield capable of cheap construction and ready installation, and held at a predetermined angle within the'lamp.

These objects are accomplished by the novel construction and practical arrangement of few and simple parts as hereinafter described and shown in the accompanying drawing, forming a material part of this disclosure and in which z*- i Figure 1 is a central vertical sectional view of a conventional head light showing the application of an embodiment ofthe invention.

Figure 2 is a perspective view of the shield and its support looking from the rear thereof.

Figure 3 is a top plan view of a modified form of support and shield engaged therewith.

A parabolic reflector 5 as seen in Figure 1 is to be considered only as representative of an ordinary type, having secured at its mouth a transparent lens 6 and at its apex a flanged opening 7 to receive a socket 8 in which may he engaged a lighting means as, an electrical light bulb 9.

A highly flexible and elastic annulus, as a band of rubber of considerable thickness,

is stretched to pass over the socket 8 to produce a flange 10 disposed'against the inner surface of the reflector 5, its opposite sidev portion 11 partially enveloping the base of the lamp bulb 9, thus generating a substantially V shaped channel 12 circumjacent the bulb socket closely adjacent the reflector as seen in Figure 1.

Tightly fitting the channel 12 ,is an opening 13 in a washer-like flat metal plate 14 provided with ears 15 perforated to receive and have riveted therein the ends of a wire 16 angularlyl bent to form humps 17 and spread to produce parallel elements connected by a bar member 18. f

Before bending the ends of the wire inwardly and riveting to the washer lll, the

outer surfaces to reflect the Vlight rays back and at some distance in advance of it.

The shape-of the shield 20 is that of a section of a sphere, its curved surface being outward and its open side disposed at a fixed angle of fifteen 'degrees with the plane 'of the lens 6 which is at a right angle with the axis of the head light. v

At the center of the shield 2O is a-cone 21 directed inwardly towards the axis of the sphere, the apex of the cone protruding slightly beyond the edge of the shield and presenting a polished outer surface.

In the modified form shown in Figure 3, the shield is in all respects as previously described but the wire support is simplified by dispensing with the washer, a coil 22 made directfrom the wire being substituted.

Extending from the ends of the coil are opposed elements 23 bent at right angles to extend in parallel as at 24, to humps .25 and thence at 26 at an angle to pass through the shield opening- 19 to be curved slightly outward and provided with teeth 27 to engage the edges of the openings in the guide, thus permitting it to be adjusted but maintained at the predetermined angles vof fifteen degrecs when installed within the head light.

From the foregoing it will be seen that the shield 20 is supported in a manner to avoid vibration, due to the elasticity of the element 11-12 and held at an angle proven by lengthy experiment to be productive of the best attainable results.

It is further noted that the entireshield structure is capable of being applied to any co'mmon form of head light, being in fact an attachment that is easy to apply and productive of the objects mentioned.

From the foregoing it will be seen that a simple device for this purpose has been disclosed in the preferred form of its embodiment, but it is not desired to restrict the details to the exact instruction shown, it being obvious that changes, not involving the exercise of invention, may be made without conflicting with the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A head light comprising in combination with a parabolic reflector, a lens and a lamp, of a spherical segmental reflecting shield disposed at an angle from the plane of said lens midway between the lens and lamp an inreaching axial cone on said shield, and a wire support for said shield carried by the socket of said lamp.

2. A head light comprising in combination with a parabolic reflector, a lens and a lamp, of a spherical segmental reflecting shield disposed 'at an angle of fifteen degrees from the plane of said lens midway between the lens and lamp, a pliable plate annulus disposed Iadjacent the inner Wall of said reflector and having a flanged portion circumjacent.. the base of said lamp, a wire support carried by said annulus, and means on the ends of said support to adjustably engage in perforations in said shield.

3. In a head light, a spherical segmental reflecting shield, a spring fork having a series of notches in each of its outer end edges in which said shield is adjustably mounted, a lamp, and a cushion sleeve surrounding the base of said lamp, said sleeve constituting an elastic seat for said fork.

4;. In a head light, a spherical segmental reflecting shield having an inreaching central cone extending past the plane on its rim, a spring fork passing through perforations in said shield, means on the prongs of said fork permitting the shield to be adjusted thereon, and means to support said fork midway between the lamp and lens of the head light at a predetermined angle.

5. In a head light, a spherical segmental reflect-ing shield, a spring fork on which said shield is mounted, means for adjusting said shield on the fork towards and from the lighting means, an elastic annulus carried in the head light, and means to engage said fork on said annulus.

6. In a head light, a spherical reflecting segment having a central cone having its apex directed radially inward, and means to retain said segment at a definite angle between the lighting means and lens of the head light on the axis thereof.

This specification signed this 29th day of December, 1926.

FRANK H. FREDETTE.

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