US1969714A - Headlight lens - Google Patents

Headlight lens Download PDF

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Publication number
US1969714A
US1969714A US69579533A US1969714A US 1969714 A US1969714 A US 1969714A US 69579533 A US69579533 A US 69579533A US 1969714 A US1969714 A US 1969714A
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US
United States
Prior art keywords
lens
glass
recess
light
clear
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
Application number
Inventor
Carl H J Burger
Original Assignee
Carl H J Burger
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Carl H J Burger filed Critical Carl H J Burger
Priority to US69579533 priority Critical patent/US1969714A/en
Application granted granted Critical
Publication of US1969714A publication Critical patent/US1969714A/en
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Application status is Expired - Lifetime legal-status Critical

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28Cover glass
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29Attachment thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10Use or application of lighting devices on or in particular types of vehicles for land vehicles

Description

Aug; 14, 1934. Q J BURGER 1,969,714

HEADLIGHT LENS Filed Oct; 30. 1955 INVENTOR.

BY I M6 4. 0" .w

ATTORNEYS.

' ARLHJ-B RGER.

Patented Aug. 14, 1934 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to automobile headlights and has for its object a specially devised, though simple and cheap, lens which will produce a beam free from objectionable glare to B motorists coming in the opposite direction yet yield a powerful and safe driving light to the driver of the car equipped therewith.

My invention is illustrated in the drawing accompanying this application and in which Fig. 1 is a perspective view of a vehicle headlight equipped with my improved lens.

Fig. 2 is an enlarged vertical central section of the lamp taken through the line 22 of Fig. 1.

Fig. 3 is an enlarged cross section of the lens and clamping rim of the lamp taken along the line 3-3 of Fig. 1

My improved lens glass is adapted to replace the glass in front of most vehicle headlights in use and is here shown applied to a conventional 20 headlight having a parabolic reflector 1, a source of light such as an incandescent filament 2 of bulb 3, an outer clamping ring or rim 4 cooperating with an inner fixed flange 5 to hold the lens 6 in place.

The lens 6 is preferably of white lens glass as generally used on headlights and it comprises a flat disk portion 6 with an oblong centrally disposed recess 7 in its front face. This recess is about 2/3rds the height or diameter of the glass 30 and a little more than half as wide as high, the best effect generally requiring a width about 3/5ths that of the height. The recess has flat side walls 8 extending inwardly at right angles to the plane of the glass, and a bottom wall 9 inwardly curved, as shown in Fig. 2 preferably on a simple circular arc struck from a point on the central horizontal axis X of the lamp. The inwardly curved wall is generally displaced about one-half inch at its greatest depth from the sur- 40 face of the flat portion and is of clear glass preferably of even thickness.

The remainder of the lens, flat portion 6, and both side walls 8 of the recess are frosted (preferably on the inner surface) as by grinding or otherwise to interrupt the rays and prevent the issuance of a clear beam of light except through the clear curved bottom wall 9 of the recess.

The width of the recess varies somewhat with the size of the electric globe and focus of the re- 5 flector used for the light, and the width generally found to give best results is one about equal to the diameter of the globe, though recess widths of about three inches give very good results with the average automobile headlight.

Lamps thus constructed have been found to give a well-lighted foreground on the highway while throwing out a powerful central beam without glare to approaching vehicles, and the effective distance handled by the central beam may be varied by focusing the light bulb 3 back and forth in the parabolic reflector 1.

The exact optical reasons for the unlooked for performance of this lens Icannot state, but it has largely to do with the inward cylindrical curving of the bottom clear wall 9 of the recess as the presentation of the convex rear surface of this clear portion to the source of light seems to turn back rays seeking to emerge at injurious angles for re-reflection at more appropriate angles through the more central portions, and the cutting of a window opening entirely through the frosted lens instead of using the inwardly curved clear wall will not yield the desired result.

Having thus described my new headlight lens, what I claim is:

In combination with a vehicle headlight having a light source and a reflector of substantially parabolic type extending from in back of the light source to a point forward of the light source, a disk of glass of a non-transparent light-diffusing character closing the forward end of the reflector provided with a vertically arranged elongated depression in its face having a bottom curved lengthwise only to substantially cylindrical form with its convex side presented to said light source and being of substantially even thickness of glass, the depression having side walls extending substantially at right angles from the plane of the disk rearwardly to the curved bottom and the curved bottom only of the depression being of clear glass.

CARL H. J. BURGER.

US69579533 1933-10-30 1933-10-30 Headlight lens Expired - Lifetime US1969714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US69579533 US1969714A (en) 1933-10-30 1933-10-30 Headlight lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69579533 US1969714A (en) 1933-10-30 1933-10-30 Headlight lens

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Publication Number Publication Date
US1969714A true US1969714A (en) 1934-08-14

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Family Applications (1)

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US69579533 Expired - Lifetime US1969714A (en) 1933-10-30 1933-10-30 Headlight lens

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209825A (en) * 1977-12-27 1980-06-24 Optronics, Inc. Lamp
US4607318A (en) * 1984-05-09 1986-08-19 Robert Bosch Gmbh Headlamp, particularly antidazzle headlamp for motor vehicles
US6575610B2 (en) * 2000-01-06 2003-06-10 Koito Manufacturing Co., Ltd. Vehicle indicator lamp
US6945675B2 (en) 2002-01-04 2005-09-20 Genlyte Thomas Group Llc Fascia wash luminaire
US20080219008A1 (en) * 2007-03-06 2008-09-11 Canlyte Inc. Lighting Device with Composite Reflector
US20080232111A1 (en) * 2007-02-28 2008-09-25 Canlyte Inc. Low Up-Light Cutoff Acorn Style Luminaire
US7494252B1 (en) 2006-06-29 2009-02-24 Genlyte Thomas Group Llc Compact luminaire enclosure
US7988327B1 (en) 2009-01-30 2011-08-02 Koninklijke Philips Electronics N.V. LED luminaire
FR3016684A1 (en) * 2014-01-21 2015-07-24 Peugeot Citroen Automobiles Sa A vehicle lighting, in particular daytime lighting, and the vehicle thus equipped

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209825A (en) * 1977-12-27 1980-06-24 Optronics, Inc. Lamp
US4607318A (en) * 1984-05-09 1986-08-19 Robert Bosch Gmbh Headlamp, particularly antidazzle headlamp for motor vehicles
US6575610B2 (en) * 2000-01-06 2003-06-10 Koito Manufacturing Co., Ltd. Vehicle indicator lamp
US6945675B2 (en) 2002-01-04 2005-09-20 Genlyte Thomas Group Llc Fascia wash luminaire
US7494252B1 (en) 2006-06-29 2009-02-24 Genlyte Thomas Group Llc Compact luminaire enclosure
US20080232111A1 (en) * 2007-02-28 2008-09-25 Canlyte Inc. Low Up-Light Cutoff Acorn Style Luminaire
US7946734B2 (en) 2007-02-28 2011-05-24 Philips Electronics Ltd Low up-light cutoff acorn style luminaire
US20080219008A1 (en) * 2007-03-06 2008-09-11 Canlyte Inc. Lighting Device with Composite Reflector
US7712929B2 (en) 2007-03-06 2010-05-11 Canlyte Inc. Lighting device with composite reflector
US7988327B1 (en) 2009-01-30 2011-08-02 Koninklijke Philips Electronics N.V. LED luminaire
FR3016684A1 (en) * 2014-01-21 2015-07-24 Peugeot Citroen Automobiles Sa A vehicle lighting, in particular daytime lighting, and the vehicle thus equipped
WO2015110736A1 (en) * 2014-01-21 2015-07-30 Peugeot Citroen Automobiles Sa Vehicle lighting device, in particular for daytime-running lights, and vehicle provided with same

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