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Publication numberUS1292637 A
Publication typeGrant
Publication dateJan 28, 1919
Filing dateDec 29, 1917
Priority dateDec 29, 1917
Publication numberUS 1292637 A, US 1292637A, US-A-1292637, US1292637 A, US1292637A
InventorsHarry M Patch
Original AssigneeHarry M Patch
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1292637 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


1,292,637. Patented Jan. 28, 1919.




1,292,637. Patented Jan. 28, 1919.



' To all whom it may concern:

Be it known that I, HARRY M. PATCH, a citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Headlight-Reflectors, of which the following is a specification.

This invention relates to reflectors and, more particularly, to reflectors for the headlights of automobiles and the like. The obj ect of the invention is to provide a reflector of this character possessing advantages over others by directing the rays emanating from the light to better illuminate the roadway in front of a vehicle-with an absence of glare in the eyes of approaching drivers or pedestrians. 1 I

These objects are attained by the novel construction of a reflector formed of a plurality of paraboloid segments arranged and combined in a novel manner.

In the accompanying drawings, Figure 1 is a diagrammatic view in vertical longitudinal section of a reflector embodyin the preferred form of my invention. Fig. 2 is a diagrammatic view in horizontal section showing the segments of the lower half of the reflector illustrated in Fig. 1. Fig. 3 is a front elevation'of the reflector shown in the preceding views. Fig. 4 is a view similar to Fig. 1 illustrating a modified form of the invention. Fig. 5 is a diagrammatic view in horizontal section showing the parts of the lower half of the reflector illustrated in Fig. 4. Fig. 6 is a front elevational view of Fig. 4. r

In carrying out my invention I provide a reflector composed of a number of paraboloid segments. Referring first to Figs. 1, 2 and 3, A represents the upper half of a reflector which is of approximately a half of a paraboloid whose lower edge is in horizontal plane through the major axis X of a paraboloid. The lower half of the-reflector is, as shown in these views, formed of a lower se central lower segment B and side segments C, the latter being disposed in the spaces between the upperzand ower segmentsA and B atopposite sides of the reflector. The

ent B has-its major axis correspond w1th the axis Xof the segment A but is set forward in respect to the latter to have its focus, indicated by b in Fig. 1, in

Specification of Letters Patent.

Patented Jan. 28, 1919.

Application filed December 29,1917. Serial No. 209,418.

advance of the focus indicated by a of the segment A.

The side segments C are disposed to have their foci a substantially in a vertical plane extending transversely through the focus a and somewhat below the axis x in which the foci of the segments A and B are located, the same being effected by swinging segments C laterally outward about pivotal points corresponding to upper forward corners y of the respective side segments and axes indicated by lines 00 parallel with and in approximately a horizontal plane extending through the aforesaid major axis x.

The light source S for a reflector constructed as above described, is positioned in the axis a: between the foci a and b. The

light rays from the source S will accordingly be reflected-from any points, as P, upon the segment A indownwardly inclined lines R Reflected light rays from any points, as P, on the lower segment B, as indicated by R will be directed downwardly (see Fig. 1) and also, as represented in Fig. 2, in substantially parallel lines with respect to a vertical plane projected through the axis a'. The light rays reflected from points as P on the side segments C will be directed downwardly, as R (Fig. 1), and in converging lines in horizontal directions, as represented by R in Fig. 2.

In-the modified form of my invention as shown in Figs. 4, 5 and 6, to which reference is now had, the upper and side segments A and C are similar in shapes and relative positions to the correspondmg part of the above-described preferred embodiment of the invention. In this instance, however, I employ a divided lower se ent whose parts are designated by B an E, arranged one in front of the other and characterized by having the forward member B raised above, an the rear member B disposed below, a paraboloid surface indicated by dotted line W in Fig. 4, which would be produced by the rotation about the axis :12 of the parabola generating the upper segment A.

The li t rays emanating from the source of light 5 in the embodiment of the inventionshown in Fi 4, 5 and 6, are reflected in directions siml ar to the correspondingly designated li ht rays with respect to the embodiment own in Figs. 1, 2 and 3 -that is to say, the rays are directed downwardly from all of the reflector segments and those reflected by the side segments are furthermore caused to converge in front of the headlight.

By such regulation of the light, the roadway in advance of an automobile provided with my improved headlight reflectors, will be illuminated with an absence of glare and without the loss of light from rays diverging from the path of the vehicle.

What I claim, isv 1. A headlight reflector the upper half of which consists of a single parabolic part,

' and the lower half of side and lower parabolic segments, said segments being arranged to present the foci of the side segments below a horizontal plane extending through the focus of said upper part and in advance of said focus and the focus of said lower segment in the referred to plane and in front of the focus of said upper part.

2. A headlight reflector having a substantially half-parabolic upper segment, a lower parabolic segment positioned to have its focus in advance of the focus and in the major axis of said upper segment, and side parabolic segments located between the upper and lower segments, said side segments being inclined laterally so as to position their foci' in a plane subjacent to the foci of the first-named segments.

3. A headlight reflector having a substan- Gopiee of this patent may be obtained for racers? tially half-parabolic upper segment, lower parabolic segments disposed one in front of the other, and arranged to have the respective reflecting surfaces thereof outside and inside of a paraboloid surface generated about the axis of said upper segment and side parabolic segments having their reflecting surfaces in tangential relations to the referred-to paraboloid surface. 7

a. In a headlight reflector provided with upper and lower parabolicsegments having a common major axis, parabolic segments interposed between the aforesaid segments at opposite sides of the reflector and having their axes of paraboloidal generation located below the axis of said upper and lower segments.

5. In a lamp, a reflector comprising upper, lower, and side parabolic segments, the upper and lower 0 said segments having a common major axis and with their foci disposed one in advance ofthe other, said side parabolic segments being arranged to have their axes below the plane of the axis of the upper and lower segments, and a light source located substantially on the axis of both the upper and lower segments and between the foci thereof. 1

Signed at Seattle, Washington, this 22nd day of December, 1917.




five cents each; by addressing the "Gcmmiaeicncr or Esteem Washington, D. t.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3215829 *Apr 2, 1962Nov 2, 1965Gen ElectricIllumination device
US5931569 *Mar 4, 1997Aug 3, 1999Pittway CorporationReflector with strobe light extending therefrom
US6623143Jul 3, 2001Sep 23, 2003Honeywell International, Inc.Ceiling reflectors
US6793375Oct 17, 2002Sep 21, 2004Honeywell International, Inc.Reflector with complex parabolid surface for elongated light source
U.S. Classification362/297
Cooperative ClassificationF21V7/09