US1525369A - Glare-preventing device for automobile headlights - Google Patents

Glare-preventing device for automobile headlights Download PDF

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Publication number
US1525369A
US1525369A US677486A US67748623A US1525369A US 1525369 A US1525369 A US 1525369A US 677486 A US677486 A US 677486A US 67748623 A US67748623 A US 67748623A US 1525369 A US1525369 A US 1525369A
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Prior art keywords
glare
lamp
reflector
light
preventing device
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Expired - Lifetime
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US677486A
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Edmund F Campbell
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof

Definitions

  • This invention relates to a means preventbeing reflected from the outer Zone shows 1 ing the glare from an automobile headlight a central dark space, but at a further range reflector. the light rays, converging slightly, prevent 'Many devices have been adopted for rethis dark central portion from being seen ducing the glare from a headlight reflector as such.
  • the bolic reflector in common use with such same may be a circular disc or the after lights, without lessening in any way the full part of the lamp bulb 2 may be coated with 25 outward projection of the light.
  • an opaque non-reflecting material the sub- The invention is particularly described in stance of the invention being the introducthe-following specification, reference being tion of a light obstructing screen between madeto the drawings by which it is accomthe back of the lamp bulb and the after so panied, in which: part of the parabolic reflector.
  • Fig. 1 is avertical section of the lamp
  • the device is exceedingly simple and has and its reflector in the casing protecting the the further advantage that it is readily same, showing the application of the shield applicable to all existing lamps without any which is the particular subject of this aprequirement of change in existing parts. 135 plication.
  • Fig. 2 is a sectional elevation of the shield vention, I hereby declare that what I claim to an enlarged scale, and as new and desire to be protected in by Fig. 3, a face view of the same. Letters Patent, is:
  • FIG. 2 represents the bulb A glare preventing means for a reflecting of the lamp, removably connected to its headlight which comprises the combination socket 3, and 4: is the parabolic reflector, with a lamp and its reflector and the lamp through the back end of which the lamp socket projecting through the reflector, of socket 3 is projected.
  • 5 is the casing in a symmetrical shield of opaque material which the lamp and its reflector are suitably having a non-reflecting surface exposed to supported and 6 is the glass through which the light of the lamp and comprising a cup- ,the light is projected forward from the like member apertured to permit passage of reflector.
  • a heat resisting washer Between the socket 3 and the lamp bulb 2 interposed between the shield and lamp bulb, is introduced a shield 8, preferably a segand a coil spring interposed between the mo mentof a sphere with non-reflecting surshield and reflector and encircling the socket, 50 faces.
  • This shield 8 is held up to the lamp substantially as shown and described.

Description

Feb. 3. 1925.
" E. F. CAMPBELL GLARE PREVENTING DEVICE FOR AUTOMOBILE HEADLIGHTS Filed NOV. 28, 1923 Emmi 'ampbell Patented Feb. s, 1925. 1,525,369
UNITED STATES PATENT OFFICE.
EDMUND F. CAMPBELL, OF VANCOUVER, BRITISH COLUMBIA, CANADA.
GLARE-PREVENTING DEVICE FOR AUTOMOBILE HEADLIGI-ITS. .Appiication filed November 28, 1923. Serial No. 677,486.
To all whom it may concern: bestos or the like heat resisting material Be it known that I, EDMUND F. CAMPBELL, between the shield and the lamp bulb.
citizen of the Dominion of Canada, residing The effect of this shield is to cut off the at Vancouver, in the Province of British light of the lamp 2 from the back end or 5 Columbia, Canada, have invented certain smaller curvature of the reflector 4, permitnew and useful Improvements in Glare-Preting the light to fall only on the outer zone venting Devices for Automobile Headlights, of the reflector. of which the following is a specification. At close range the light from the lamp This invention relates to a means preventbeing reflected from the outer Zone shows 1 ing the glare from an automobile headlight a central dark space, but at a further range reflector. the light rays, converging slightly, prevent 'Many devices have been adopted for rethis dark central portion from being seen ducing the glare from a headlight reflector as such.
or for dimming the light, but all such with The effect of this device in preventing 15 which I am acquainted are either ineffective glare is very marked, and the result is ator depend on a diminution of the light to tained without any sensible diminution of an extent as to render it practically useless the light as reflected forward. I attribute for illumination of the roadway. this result solely to the light not being The device, which is the subject of this allowed to fall on the inner end of the 0 application, is designed to prevent the light reflector.
of the lamp being reflected forward from I do not desire to be confined to the parthe back or smaller curvature of the paraticular form of shield here set forth as the bolic reflector in common use with such same may be a circular disc or the after lights, without lessening in any way the full part of the lamp bulb 2 may be coated with 25 outward projection of the light. an opaque non-reflecting material, the sub- The invention is particularly described in stance of the invention being the introducthe-following specification, reference being tion of a light obstructing screen between madeto the drawings by which it is accomthe back of the lamp bulb and the after so panied, in which: part of the parabolic reflector.
Fig. 1 is avertical section of the lamp The device is exceedingly simple and has and its reflector in the casing protecting the the further advantage that it is readily same, showing the application of the shield applicable to all existing lamps without any which is the particular subject of this aprequirement of change in existing parts. 135 plication. Having now particularly described my in- 55 Fig. 2 is a sectional elevation of the shield vention, I hereby declare that what I claim to an enlarged scale, and as new and desire to be protected in by Fig. 3, a face view of the same. Letters Patent, is:
In these drawings 2 represents the bulb A glare preventing means for a reflecting of the lamp, removably connected to its headlight which comprises the combination socket 3, and 4: is the parabolic reflector, with a lamp and its reflector and the lamp through the back end of which the lamp socket projecting through the reflector, of socket 3 is projected. 5 is the casing in a symmetrical shield of opaque material which the lamp and its reflector are suitably having a non-reflecting surface exposed to supported and 6 is the glass through which the light of the lamp and comprising a cup- ,the light is projected forward from the like member apertured to permit passage of reflector. the base of the lamp, a heat resisting washer Between the socket 3 and the lamp bulb 2 interposed between the shield and lamp bulb, is introduced a shield 8, preferably a segand a coil spring interposed between the mo mentof a sphere with non-reflecting surshield and reflector and encircling the socket, 50 faces. This shield 8 is held up to the lamp substantially as shown and described.
bulb 2 by a spring 10 between the reflector In testimony whereof I afliX my signature.
and the shield S with a washer 9 of as- EDMUND F. CAMPBELL.
US677486A 1923-11-28 1923-11-28 Glare-preventing device for automobile headlights Expired - Lifetime US1525369A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829412A (en) * 1986-09-10 1989-05-09 Thorn Emi Plc Spotlight arrangement
US5660462A (en) * 1994-09-13 1997-08-26 Osram Sylvania Inc. High efficiency vehicle headlights and reflector lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829412A (en) * 1986-09-10 1989-05-09 Thorn Emi Plc Spotlight arrangement
US4879638A (en) * 1986-09-10 1989-11-07 Thorn Emi Plc Spotlight arrangement
US5660462A (en) * 1994-09-13 1997-08-26 Osram Sylvania Inc. High efficiency vehicle headlights and reflector lamps

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