US2045564A

US2045564A - Nonglare reflector

Info

Publication number: US2045564A
Application number: US677442A
Authority: US
Inventors: William L Bear; George R Walker
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-06-24
Filing date: 1933-06-24
Publication date: 1936-06-30
Anticipated expiration: 1953-06-30

Description

June so, 1936 L, EA ET AL 2,045,564

NONGLARE REFLECTOR F-iled June 24, 1953 Z4 M BY 7} 1 /7054...

ATTORNEY 11v VENTORJ A Patented June 30, 1936 umrso STATS NONGLARE REFLECTOR William L. Bear, Dayton, and George It. Walker,

Oakwood, Ohio Application June 24, 1933, SerialNo. 677,442

1 Claim. (01. 240-4s.s)

This invention relates to new and useful improvements in non-glare reflectors.

It is one of the principal objects of our invention toprovide a non-glare reflector for headlights, searchlights and other illuminating devices.

Another object of our invention is to provide an auxiliary reflector for attachment to electric lamp bulb sockets in an easy and firm manner and having spaced concave reflecting and. supporting shells integral at their peripheries.

It is another object of our invention to provide a non-glare reflector which is so constructed and arranged as to reclaim all waste rays for proper projection by the parabolic reflector behind it. No rays are wasted through ascension or descension.

It is another object of our invention to provide means for adjusting the position of the auxiliary reflector toward or away from the lamp bulb to protect its reflecting surface from the extremely high temperature of the lamp.

Another object of our invention is to provide means for ventilating the space between the reflecting and supporting shells by forming in the latter a ventilating hole, behind the reflecting surface.

Other important and incidental objects will be brought out in the following specification and particularly set forth in the subjoined claim.

In the accompanying drawing illustrating our invention, Figure 1 is a sectional View taken through an adjustable headlight, showing our auxiliary reflector in its normal mounted position. Figure 2 is a plan view of the auxiliary reflector and its supporting frame. Figure 3 is a front end view of the auxiliary reflector and its support. Figure 4 is a rear end view of the auxiliary reflector support. Figure 5 is an inside view of the urn-shaped auxiliary reflector shell. Figure 6 is a side view thereof. Figure 7 is a side view of a lamp bulb, the upper half of the end surface of which is silvered from the end of the filament to the outer extremity of the bulb. And. Figure 8 is a sectional view taken through the auxiliary reflector.

In the accompanying drawings illustrating different forms of embodiment of our invention, the numeral l designates a conventional vehicle headlight provided with an outer casing Z, a parabolic reflector 3, a socket 4, lens 5 and a retainer ring 6.

Adapted to be inserted in the socket 4 is a dual filament bulb 1, although any other form of bulb may be employed if desired. Adapted to be applied to the lamp base 1* is the semi-circular portion 8 of the inner end part of a U-shaped support 9 for an auxiliary reflector Ill. The inner end part of the U-shaped support passes through one apertured end of a curved clamping band I I. The other apertured end of this band receives the threaded extension l2 of an eye piece l3 through which the inner end part of the U-shaped support also passes. Applied to the threaded extension I2 is a nut M which, when screwed inwardly, draws the clamping band I I and the semicircular portion of the U-shaped support tightly around the lamp base 1*. (See Figures 1 and 4.)

The outer ends of the arms l4, M are threaded to receive inner nuts l5, l5 and outer shouldered nuts H5, H5. Between the shouldered ends of the nuts l6, and. the nuts [5, the sleeve ends of a cross band I! are fitted, to the threaded outer ends of the arms l4. By means of the nuts l5 and I6 the cross band I! may be held in an adjusted position on the U-shaped support 9.

At its middle portion the cross band I! is formed with a loop l8 which is drawn tightly around a concave axial boss or projection l9 on an auxiliary reflector shell 10. The cross band is tightly held at the neck portion of the loop by a U clamp 20. 4

Directly opposite the clamp 20 the cross band is formed with a lip 2| that is bent through a recess 22 in the flange portion 23 of the reflector projection l9.

The U-member 9 and cross band I! form a supporting frame for the auxiliary reflector l0, although any other suitable support may be provided if desired. This auxiliary reflector preferably comprises an inner glass semi-spherical member Ill which is supported at its periphery within a substantially concentric outer supporting shell Ill on which the projection I9 is formed and having therein a ventilating hole 24 that communicates with the space between the inner member I0 and the outer shell Ill as shown in Figure 8. The interior of the reflecting shell I0 is concaved as shown by the dotted lines in Figures 1, 2 and 6, so that it may be supported by the U frame in front of the bulb 1, with an air space of substantially uniform width between the outer surface of the bulb and the interior surface of the shell. In the position the auxiliary reflector occupies in Figure 1, the radius between the light source as a center and any point in inner surface 25 of the reflector, will be substantially the same, or that indicated by the arrow A in Figure 1. The heat insulation which the shell provides for the reflecting surface 25, permits a metallic silver coating to be applied, in this instance to the upper half of that surface, without fear of its deterioration as a result of exposure to the intense heat of the lamp bulb.

The reflecting surface is further protected from the extremely high temperatures of the lamp bulb by the provision which we have made, through the nuts l5 and I6, for the adjustment of the auxiliary reflector shell. These nuts are adapted to hold the reflector in a desired position away from, or close to, the lamp bulb 'l.

The glass reflector shell H), with its rounded rim portion, is supported in such a manner that the center of curvature of its inner surface 25 is substantially the center of the source of light. The latter is the filament 26 of the lamp bulb I, to which the inner end of the arrow A points in Figure 1. Being located a short distance from the periphery of the bulb, and having its upper half silvered as shown in Figure 5, the inner surface of the auxiliary reflector will reclaim the waste rays from the bulb and project them against the parabolic reflector 3, which in turn Will direct them outwardly below the upper half of the auxiliary reflector to prevent glare.

There are other means for reclaiming, and directing outwardly in a non-glare manner, the waste rays emitted by the lamp bulb. In Figure '7 we have also achieved this result by applying a silver coating 21 to a lamp bulb 28 adapted to be supported by the socket 4. This coating covers the upper half of the outer surface of the bulb, extending outwardly from the end of the double filament 29 to the extremity of the bulb.

Having described our invention, we claim:

The combination with a main reflector, a lamp socket and an electric lamp bulb in said socket in front of the main reflector, of a U-shaped member secured to the lamp base, the arms of said member projecting forwardly, one on each side of said lamp bulb, an auxiliary reflector comprising a semi-spherical shell having at its rear portion an axial boss containing a ventilating opening, a cross piece longitudinally adjustable along the outer ends of said arms, and a loop at the middle portion of said cross piece fitted to the axial boss on the auxiliary reflector to support the latter a desired distance in front of said bulb.