US1841917A - Headlight reflector - Google Patents
Headlight reflector Download PDFInfo
- Publication number
- US1841917A US1841917A US348700A US34870029A US1841917A US 1841917 A US1841917 A US 1841917A US 348700 A US348700 A US 348700A US 34870029 A US34870029 A US 34870029A US 1841917 A US1841917 A US 1841917A
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- US
- United States
- Prior art keywords
- reflector
- angles
- portions
- headlight reflector
- headlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
Definitions
- This invention relates particularly to a reflector for use on automobile headlights, and aims to provide an improved reflector in which the illuminating efficiency of the 5 beam will be maintained to the fullest extent,
- This object is attained by providing a parabolic reflector in which the lower half of the reflector is provided with a series of surfaces following a parabolic curve in the di rection of the axis of the beam and tilted at an angle away from the central axis of the beam.
- Fig. 1 is a front elevation of the reflector.
- Fig. 2 is a section on line 2-2, of Fig. 1.
- the reflector is of general parabolic shape and it will be clear from Fig. 1 that the upper half 11 of the reflector is in the form of a true and smooth parabola.
- the rays of light that cause the glare from a headlight are those reflected from the lower half of the ordinary parabolic reflector.
- the lower half of the reflector is formed with inner portions 12 extending a substantial distance from the center (preferably about halfway, or more) to the front, and outer portions 13, extending from the ends of the inner ones to the front, or front-flange 14.
- the inner portions have relatively large dihedral angles; that is, the angle of their r sides is preferably more than 90; they reflect light upward to the upper, smooth surface 11, by which it is reflected forward and downward without glare eifect.
- the outer portions 13 preferably have smaller dihedral angles, approximately or exactly 90, and when so proportioned they refleet light angularly forward and laterally, providing effective illumination of the side of the road, and areas adjacent the road-side signs, etc., Without necessity for use of a spot-light, and also without glare effect.
- a headlight reflector of generally parabolic form having its upper half smooth, and its lower half provided with inner and outer radial portions of generally parabolic contour corrugated to form arcuate series of dihedral angles, the angles of the inner portions being relatively large to reflect light generally forward and upward, and the angles of the outer portions being relatively smaller, to reflect light principally in lateral directions.
Description
Jan. 19, 1932. sc 1,841,917
HEADLIGHT REFLECTOR Original Filed March 21, 1929 Patented Jan. 19, 1 932 UNETED STATES PATENT OFFICE HEADLIGHT REFLECTOR Application filed March 21, 1929, Serial No. 348,700. Renewed June 10, 1931.
This invention relates particularly to a reflector for use on automobile headlights, and aims to provide an improved reflector in which the illuminating efficiency of the 5 beam will be maintained to the fullest extent,
but in which objectionable glare will be eliminated.
This object is attained by providing a parabolic reflector in which the lower half of the reflector is provided with a series of surfaces following a parabolic curve in the di rection of the axis of the beam and tilted at an angle away from the central axis of the beam.
While I have disclosed a preferred embodiment for purposes of illustration it should be understood that various changes in the structure may be made without departing from the spirit and scope of the invention as hereinafter described and claimed.
In the drawings:
Fig. 1 is a front elevation of the reflector.
Fig. 2 is a section on line 2-2, of Fig. 1.
M The reflector is of general parabolic shape and it will be clear from Fig. 1 that the upper half 11 of the reflector is in the form of a true and smooth parabola. The rays of light that cause the glare from a headlight are those reflected from the lower half of the ordinary parabolic reflector. In order to eliminate the glare in the present invention the lower half of the reflector is formed with inner portions 12 extending a substantial distance from the center (preferably about halfway, or more) to the front, and outer portions 13, extending from the ends of the inner ones to the front, or front-flange 14.
These portions form corrugations in which the sides of the corrugations meet each other in sharp angles so that such sides form a succession of dihedral angles.
The inner portions have relatively large dihedral angles; that is, the angle of their r sides is preferably more than 90; they reflect light upward to the upper, smooth surface 11, by which it is reflected forward and downward without glare eifect.
The outer portions 13 preferably have smaller dihedral angles, approximately or exactly 90, and when so proportioned they refleet light angularly forward and laterally, providing effective illumination of the side of the road, and areas adjacent the road-side signs, etc., Without necessity for use of a spot-light, and also without glare effect.
I claim:
1. A headlight reflector of generally parabolic form, having its upper half smooth, and its lower half provided with inner and outer radial portions of generally parabolic contour corrugated to form arcuate series of dihedral angles, the angles of the inner portions being relatively large to reflect light generally forward and upward, and the angles of the outer portions being relatively smaller, to reflect light principally in lateral directions.
2. The structure as defined in claim 1, with the addition that the angles of the inner portions are greater than 90, and the angles of the outer portions are approximately 90.
In testimony whereof I aflix my signature.
EUGENE SOHIMPFF.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US348700A US1841917A (en) | 1929-03-21 | 1929-03-21 | Headlight reflector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US348700A US1841917A (en) | 1929-03-21 | 1929-03-21 | Headlight reflector |
Publications (1)
Publication Number | Publication Date |
---|---|
US1841917A true US1841917A (en) | 1932-01-19 |
Family
ID=23369158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US348700A Expired - Lifetime US1841917A (en) | 1929-03-21 | 1929-03-21 | Headlight reflector |
Country Status (1)
Country | Link |
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US (1) | US1841917A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2714793A1 (en) * | 1977-04-02 | 1978-10-12 | Westfaelische Metall Industrie | Reflector for vehicle headlamps |
US4241393A (en) * | 1979-06-14 | 1980-12-23 | Olson Goodwin W | Auxiliary reflector |
US4761721A (en) * | 1986-05-26 | 1988-08-02 | Raak Licht B.V. | Reflector for an oblong light source |
US5130902A (en) * | 1989-02-24 | 1992-07-14 | Robert Bosch Gmbh | Light, in particular for motor vehicles |
USD744157S1 (en) * | 2014-03-18 | 2015-11-24 | Osram Gmbh | LED lamp lens |
-
1929
- 1929-03-21 US US348700A patent/US1841917A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2714793A1 (en) * | 1977-04-02 | 1978-10-12 | Westfaelische Metall Industrie | Reflector for vehicle headlamps |
US4241393A (en) * | 1979-06-14 | 1980-12-23 | Olson Goodwin W | Auxiliary reflector |
US4761721A (en) * | 1986-05-26 | 1988-08-02 | Raak Licht B.V. | Reflector for an oblong light source |
US5130902A (en) * | 1989-02-24 | 1992-07-14 | Robert Bosch Gmbh | Light, in particular for motor vehicles |
USD744157S1 (en) * | 2014-03-18 | 2015-11-24 | Osram Gmbh | LED lamp lens |
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