US1508530A

US1508530A - Glareshield

Info

Publication number: US1508530A
Authority: US
Inventors: George W Powell; Joseph L Smith; Howard E Dixon
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-12-08
Filing date: 1923-12-08
Publication date: 1924-09-16
Anticipated expiration: 1941-09-16

Description

Sept. 16 1924.

. 4 1,508,530- G. w. POWELL ET AL GLARESHIELD I Filed Dec. 8,1923 2 Sheets-Sheet. l

Sept. 16, 1924. 1,508,530

G. W. POWELL ET AL GLARESHIELD Filed Dec. s, 1923 2 Sheets-Sheet. 2

Patented Sept. 16, 1924.

UNITED STATES 1,508,530 PATENT OFFICE.

GEORGE -W. POWELL, JOSEPH L. SMITH, AND HOWARD E. DIXON, OF LA GRANDE,

. a OREGON.

GLARESHIELD.

Application filed December 8, 1923. Serial No, 679,484.

To all whom it concern:

Be it known that we, GEORGE W. POWELL,

JOSEPH L. SMITH, and HOWARD E. DIXON,-

citizens of the United States, residin at La Grande, in the county of Union an State of Oregon, have invented certain new and useful Improvements in Glareshields, of which the following is a specification, reference being had to the accompanying drawlngs.

This invention relates to improvements in glareshields for automobile headlights and more'particularly to a device of this character adapted to be arranged interiorly of the headlight.

An important object of the invention is to provide a device of this character which, while eliminating all direct rays from the lamp which pass upwardly or horizontally through the lens of the headlight, permits refracted rays of the parabolic reflector usually employed to pass from the lamp to illuminate the road.

' A further object of the invention is to provide a glare shield of this character of such construction that the shield does not form a dead spot at the upper surface of the lens, where such shields are usually provided, but is soconstructed that it actually permits filtration of rays therethrough for illumination of the road.

A further object of the invention is to provide a device of this character which may be very readily applied to standard constructions of headlights without in any manner interfering with the normal operation of the headlight;

These and other obg'ects we attain by theconstruction shown 11 the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment 0 our invention and wherein Figure 1 is a vertical sectional view through a headlight embodying a glare shield constructed in accordance with our invention Figure 2 is a perspective of the glare shield removed;

Figure 3 is a section on the line 3-3 of Figure 5, illustrating the fact that the shield permits the passage of refracted light;

Figure 4 is a view of the shield looking upwardly and forwardly from the point of location of the headlight filament this view illustrating the fact that the plates completely out ofi all direct rays of the filament from the lens; and

Figure 5 is a rear elevation of the headlight rim and lens removed, showing the shield applied thereto. Referring now more particularly to the drawings, the numeral 10"indicates the casing of a headlight, 11 "the usual parabolic reflector disposed therein, 12 the illuminating element bulb, 13 the lens attaching rim,

and 14 the lens shown in the present instance as consisting of asheet of clear glass although it will be readily understood that the device may be applied to those headlights whieh' depend upon their construction for the refraction of rays in such manner as to not provide a glaring light. .In the usual construction of the headlight. rim and lens, the internal diameter of the rim 1s slightly less than the external diameter of the headlight lens, so that the edges of the lens project beyond the inner edges of the rim and is held in position by means of clips 15'0r the like carried by the rim engaging the inner faces of the lens. .As w ll hereinafter appear, we employ these clips as a means for holding in position the glare shield constructed in accordance with our invention.

- The glare shield proper'consists of two plates16 and 17, hereinafter referred to as the upper and lower plates, these lates com- "bining when viewed from the point of location of thefilament of the lamp to rovide a triangle efi'ectually cutting off al view of the edges of the lens as inner edge of the lens run. 13. The n per and

lower plates

16 and 17 are 1ncl1 ne 1nwardly from the face of the lens, the lnclination being upwardly and outwardly from this lens, the plates being in substantially parallel planes. The uppenplate 16 1s rovided with a terminal portion 18 who is arcuately curved and overhangs the lower plate 17. This upper plate is substantially triangular in form. The lower plate is 1n the form of a triangle having an arcuate' segment removed from the u per angle thereof, this arcuate se ent aligning with the curved extension 0 the upper late. 16

and provided in the up er edge of t is lower efined by the [ill which extension lies at the approximate center of the lens when the device is in applied position and efiectually prevents direct rays from the illuminating element 12 from pass= ing from the casing. These plates are each provided at their ends with extensions 21 by means of which they are attached to an annulus 22 having an internal diameter substantially equal to the internal diameter of the lens, as defined by the lens rim, and an external diameter substantially equaling the true diameter of the lens. lhis annulus is placed against the inner face of the lens and is included in the clips 15 when the same are employed to fasten the lens in posi tion in the rim.

By comparative inspection of Figures 5 and at, which latter figure is a rear elevation of the lens taken from a point approximating the filament of the illuminating element, it will be seen that it is. impossible for direct rays from the lamp to pass through the lens ifsuch rays are at an angle which permit these rays to blind the operators of oncoming vehicles, it being understood that the lower edge of the lower plate 17 is arranged at a point upon the lens to intersect such blinding rays. This comparison will further show that the combination of the plates 16 and 1'? will permit refracted rays from the filament to pass from the headlight, this detail being more clearly shown in Figure 3. lit will. however. be obvious that since in order to pass these plates the rays must come into contact with the parabolic reflector, these rays will be corrected and will issue from the headlight in approximately straight line so that they will not cause discomfort to the operators of other vehicles.

Attention is now directed particularly to Figure 1. lln this figure we have illustrated a vertical sectional view through the headlight taken through the plates 16 and 1-? approximately centrally thereof. From this figure it will be obvious that while direct rays are etlectually cut off by the

plates

16 and 17, at the same time in the space between the point of attachment of the plate 16 and the point of attachment of the plate 1'? a space is left through which rays may be deflected. Rays are deflected through this opening by reason of the fact that the notching of the upper end of the plate 17 exposes a considerable portion of the plate 16 to view and by reason of the fact that the inner face of the plate 16 and outer face of the plate 17 are highly polished as is likewise the inner face of the plate 17. It will be seen. that forwardly directed rays reflected by the reflector 11 of the headlight striking against the plate 16 will be deflected downwardly against the outer face of the plate 17 and that from this plate they will be again thrown forwardly through the headlight lens.

neoaseo The curved terminal portion 18 of the plate 16 serves to deflect a ortcion of the direct rays from the bulb or il uminating element 12 against the outer face of the plate 17 so that they likewise pass through the opening. It will be noted that these rays in their deflection from the plate 17 are inclined downwardly toward the ground and accordingly will not be dazzling.

From the foregoing it is believed to be obvious that when provided with a glare shield constructed in accordance with our invention a headlight will be free from glaring direct rays which tend to confuse the drivers of oncoming vehicles. lt will turthermore be obvious that the construction of the device is capableof a considerable range of change and modification without materially departing from the spirit of our invention and we accordingly do not limit ourselves to such specific structure as hereinbefore set forth except as hereinafter claimed.

We claim 1. The combination with a headlight embodying the usual illuminating element, parabolic reflector and lens, of a glare preventer arranged within the headlight at the upper portion of the lens thereof intercepting upwardly inclining direct rays from the illuminatingelement to prevent their pas sage through the lens but permitting the passage of retracted rays about the edges thereof, said glare prevent/er comprising spaced upper and lower plates arranged above the horizontal plane of the headlight illuminating element, the ortions of the plates adjacent the lens being spaced, one of said plates being positioned to reflect light from the headlight illuminating element upon the other of the plates for refraction thereby through such space.

2. The combination with a headlight embodying the usual illuminating element parabolic reflector and lens, of a glare preventer arranged within the headlight at the upper portion of the lens thereof intercepting upwardly inclining direct rays from the illuminating element to prevent their passage through the lens but permitting the passage of refracted rays about the edges thereof, said glare preventer comprising spaced upper and lower plates arranged above the horizontal plane of the headlight illuminating element having their adjacent faces highly polished to form reflectors, one of said plates being positioned to reflect light from the headlight illuminating element upon the other of the plates for refraction thereby through such space.

3. The combination with a headlight embodying the usual illuminating element, parabolic reflector and lens, of a glare preventer arranged within the headlight at the till I upper portion of the lens thereof interceptclining upwardly ing upwardly inclining direct rays from the illuminatin element to prevent their passage throug the lens but permitting the passage of refracted rays about the edges thereof, said glare preventer comprising spaced upper and lower plates arranged above the horizontal plane of the headlight illuminating element affording a space therebetween at the lens for the passage of light through the lens, one of said plates being positioned to reflect direct light from the headlight -illuzninating element and light from the illuminating element refracted by the reflector upon the other of the plates for refraction thereby through such space.

4:. The combination with a headlight ems bodying the usual, illuminating element parabolic reflector and len's,'of a glare preventer arranged within the headlight at the upper portion of the lens thereof intercepting upwardlv inclining direct rays from the illuminating element to prevent their passage through the lens but. permitting the passage of refracted rays about the edges thereof, said glare preventer comprising spaced upper and lower plates affording therebetween a space permittin' passage of rays throughthe headlight, sa1d plates inand rearwardly and havingadjacentfaces thereof highly polished,

one of said lates having an angular portion reflectin the headlight illumithe other of the plates light from nating e ement upon for refraction thereby through such space.

5. The combination with a headlight embodying. the usual illuminating element, parabolicfreflector and lens, of a glare-preventer arranged within the headlight at the upper portion of the lens thereof intercepting upwardly inclining direct rays from the illuminating element to prevent their passage throu h the lens but permitting the passage of re racted rays about the edges thereof,

said glare preventercomprising spaced upper and lowerplates affording therebetween a space permitting passage of rays through the headlight, said plates inclining upwardly and rearwardly and having adjacent faces thereof highly polished, one of said plates having a portion reflectin light from the headlight illuminating e ement upon the other of thereby through such space, and other portions reflecting refracted light from the headlight reflector upon such other plate for refraction through such'space.

6. The combination with a headlight embodying the usual illuminating element, parabolic reflector and lens, of. a glare preventer arranged within the headlight at the upper portion of the lens thereof intercepting upwardly inclining direct rays from the illuminating element to prevent their passage through the lens but permitting the passage of refracted raysabout the edges thereof, said' lare preventer comprising spaced upper and lower plates affording In testimony v whereof we hereunto affix our signatures.

GEORGE W. POWELL. JOSEPH L. SMITH. HOWARD E. DIXON.

the plates for refraction 7 light