US1735209A - Lens - Google Patents

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Publication number
US1735209A
US1735209A US14007026A US1735209A US 1735209 A US1735209 A US 1735209A US 14007026 A US14007026 A US 14007026A US 1735209 A US1735209 A US 1735209A
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United States
Prior art keywords
lens
light
deflectors
ring
same
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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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Henry M Nelson
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GEORGE B SHAW
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GEORGE B SHAW
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Publication date
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Priority to US14007026 priority Critical patent/US1735209A/en
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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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • 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
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • My invention relates to lenses for use in conjunction with head lights, and particularly automobile head lights, and has for its object to provide a lens adapted to reduce the glare usually prevalent with automobile head lights, employing a parabolic or similar reflector. 7
  • Another object of the invention resides in providing a lens formed with a circular plate having issuing inwardly therefrom apair of concentric tubular deflectors, said deflectors being constructed with the upper portionsof the surfaces thereof as mirrors to deflect rays of light approaching the same from the interior thereof downwardly so as to prevent the undesirable glare now existing with the ordinary type of head light.
  • Another object of the invention resides in constructing the lens with a ring like portion protruding outwardly beyond the lens holder for bringing the deflectors away from the light source and for permitting the projection of the light raysupon the roadad acent the curb or gutter.”
  • FIG. 1 is a longitudinal sectional view of a headlight illustrating my improved lens attached thereto.
  • Fig. 2 is a rear elevational view of my 1mproved lens detached from the'headlight.
  • an ordinary head light A constructed with a shell like case 10 open at the forward end and provided with an internally extending flange 11.
  • the case 10 is mounted upon any suitable support 12 by means of which the head light may be supported on the chassis of the
  • a parabolic reflector 13 formed with a flange 14 adapted to overlie the flange 11 of said case.
  • This parabolic reflector has attached to it along the axis thereof a. light 3 socket 15 adapted to receive an electric light of the lens and hold the same in position in the front of the head light.
  • the lens proper indicated in its entirety at B is preferably constructed of glass or some other suitable transparent material and comprises primarily a body portion formed with a circular face 18. Along the margin of this face is constructed an inwardly extending ring like portion which terminates in an outwardly extending flange 21.
  • the ring like portion 20 is of such a size as to snugly pass through the opening through the rim 17 I of the lens holder 16, while the flange 21 is so proportioned as to overlie the flange 14 of the reflector 13.
  • a cushion: ing gasket 22 is employed which is positioned between flange 14 of the reflector 13 and the flange 21 of the lens proper.
  • the interior of the lens B are arranged two concentric tubular deflectors 23 and 24 preferably constructed integral with the face 18.
  • These deflectors are of such length that the deflector 24 which is the larger in diameter projects inwardly beyond the flange 21 of the lens and so that the deflector 23 which is of lesser diameter than the deflector 24 extends inwardly beyond the edge of said last named deflector.
  • These tubular deflectors are arranged concentricto one another as well as concentric to the ring like portion 20.
  • the outer surfaces of the upper halves of each of the tubular deflectors 23 and 24 are coated with some suitable silver preparation to provide mirrors on such surfaces adapted to reflect rays impinging upon the inner surfaces of the same.
  • the remaining surfaces of the tubular deflectors 23 and 24 are preferably frosted as indicated at 27 and 28, though the same may be constructed of clear glass, if desired.
  • the ring like portion 20 is preferably frosted, as indicated at 37 from a point 38 at the lowermost portion of the same and around the left hand side of the lens and above the upper portion, leaving the balance of the said ring like portion of clear glass.
  • the face B may be frosted for a portion of the upper parthereof as indicated at 30 betweenthe ring like portion 20 of the deflector 2%. Such frosting tends to reduce the glare from the reflector, though the same is not absolutely essential to the successful. operation of the invention. 7
  • the 01 oration of my, improved lens is as follows: Vlhcn the lens is mounted in a suit able head light, as indicated at Fig. l, the ra s of light from the bulb 19, w ich extend outwardly and rearwardly from the same, are r flocked by meansof the reflector 13 to project from said reflector in parallel relation to the axis thereof passing freely through the annular portions of the face 18 of lens B between the respective tubular deflectors 23 and 24and the ring like portion 20.
  • the central portion of the rays wnich pro ect forwardly from the bulb 19 are caused to project directly through the circular space 31 of the face 18 situated within the interior of the tubular deflector Since only a small proportion of such rays are allowed to pass directly through the lens, the upwardly directed portion thereof is very small and at the same time due to the diameter of the said deflector, the upward inclination of the same is so slight as. to prevent the same from reaching the. vision of approaching drivers and pedestrians.
  • the remaining portion of the ravs of light emanating in an outward direction and directed upwardly are intercepted by the mirrors 25 and 26 of the ,deflectors 23 and Q l and caused to be deflected downwardly and out of vision.
  • the invention provides a simple and efl'ecive head light lens adapted to minimize the glare from the reflector and source of. light wi hout appreciably diminishing the amount of light passing through the lens. This has the effect of increasing the ehiciency ofthe head light while at the same time permits a safe approach to'the vehicle.
  • sufiicient light may be cast to the side of the road as to illuminate the gutter or curb and inform the driver of the condition of the side of the road as well as of the road in front of him.
  • a head light lens comprising a flangefor attachment inv a lens holder, a. ring like port-i n connected witlr said flange and issu ing outwardly beyond the lens holder, a circular plate connectedwith.
  • said ring. like portion and pair of concentric tubular deflectors centrally situatedwith respect to said plate and ring like portion, said deflectors isaway from said plate and toward the source of light, the larger of said deflectors being longer than said ring like portion, and the smaller of said. deflectors being longer than the larger deflector, both of said deflectors being. formed with mirrors upon the urfaces of the upper halves. thereof for causlight rays approaching the same to-be delected downwardly.
  • 1119115 comprising a circular plate and a tubular deflector concentrically positioned relative thereto and issuing away from said plate tOVcl'd the source of light, said tubular deflector being. formed with a mirror upon t 1e surface of the upper half thereof for defleeting rays of light approaching the same along the interior thereof in a downward direction, the lower half of said deflector'being formed translucent.

Description

Nov. 12, 1929. H. M. NELSON LENS ' Filed Oct.
gwuent'o'o flenry PEI son abtozmgs Patented Nov. 12, 1929 UNITED STATES PATENT OFFICE HENRY M. NELSON, F MINNEAPOLIS, MINNESOTA, ASSIGNOR TO GEORGE B. SHAW, I on EAU CLAIRE, WISCONSIN motor vehicle.
LENS
Application filed October 7, 1926. Serial No. 140,070.
My invention relates to lenses for use in conjunction with head lights, and particularly automobile head lights, and has for its object to provide a lens adapted to reduce the glare usually prevalent with automobile head lights, employing a parabolic or similar reflector. 7
Another object of the invention resides in providing a lens formed with a circular plate having issuing inwardly therefrom apair of concentric tubular deflectors, said deflectors being constructed with the upper portionsof the surfaces thereof as mirrors to deflect rays of light approaching the same from the interior thereof downwardly so as to prevent the undesirable glare now existing with the ordinary type of head light.
Another object of the invention resides in constructing the lens with a ring like portion protruding outwardly beyond the lens holder for bringing the deflectors away from the light source and for permitting the projection of the light raysupon the roadad acent the curb or gutter."
lVith the foregoing and other objects in view, which will appear in the following description, the invention resides in the novel combination and arrangement of parts and in the details of construction hereinafter described and claimed.
In the. drawings illustrating my invention Fig. 1 is a longitudinal sectional view of a headlight illustrating my improved lens attached thereto. I
Fig. 2 is a rear elevational view of my 1mproved lens detached from the'headlight.
For the purpose'of illustrating the application of the invention, I have shown an ordinary head light A constructed with a shell like case 10 open at the forward end and provided with an internally extending flange 11. The case 10 is mounted upon any suitable support 12 by means of which the head light may be supported on the chassis of the Within the case 10 is positioned a parabolic reflector 13 formed with a flange 14 adapted to overlie the flange 11 of said case. This parabolic reflector has attached to it along the axis thereof a. light 3 socket 15 adapted to receive an electric light of the lens and hold the same in position in the front of the head light.
The lens proper indicated in its entirety at B is preferably constructed of glass or some other suitable transparent material and comprises primarily a body portion formed with a circular face 18. Along the margin of this face is constructed an inwardly extending ring like portion which terminates in an outwardly extending flange 21. The ring like portion 20 is of such a size as to snugly pass through the opening through the rim 17 I of the lens holder 16, while the flange 21 is so proportioned as to overlie the flange 14 of the reflector 13. In mounting the lens a cushion: ing gasket 22 is employed which is positioned between flange 14 of the reflector 13 and the flange 21 of the lens proper. I I
lVithin the interior of the lens B are arranged two concentric tubular deflectors 23 and 24 preferably constructed integral with the face 18. These deflectors are of such length that the deflector 24 which is the larger in diameter projects inwardly beyond the flange 21 of the lens and so that the deflector 23 which is of lesser diameter than the deflector 24 extends inwardly beyond the edge of said last named deflector. These tubular deflectors are arranged concentricto one another as well as concentric to the ring like portion 20. The outer surfaces of the upper halves of each of the tubular deflectors 23 and 24 are coated with some suitable silver preparation to provide mirrors on such surfaces adapted to reflect rays impinging upon the inner surfaces of the same. These mirrors are indicated at 25 and 26 in the drawings. The remaining surfaces of the tubular deflectors 23 and 24 are preferably frosted as indicated at 27 and 28, though the same may be constructed of clear glass, if desired. In adoition to the frosting of the said deflectors, the ring like portion 20 is preferably frosted, as indicated at 37 from a point 38 at the lowermost portion of the same and around the left hand side of the lens and above the upper portion, leaving the balance of the said ring like portion of clear glass. In addition the face B may be frosted for a portion of the upper parthereof as indicated at 30 betweenthe ring like portion 20 of the deflector 2%. Such frosting tends to reduce the glare from the reflector, though the same is not absolutely essential to the successful. operation of the invention. 7
The 01 oration of my, improved lens is as follows: Vlhcn the lens is mounted in a suit able head light, as indicated at Fig. l, the ra s of light from the bulb 19, w ich extend outwardly and rearwardly from the same, are r flocked by meansof the reflector 13 to proiect from said reflector in parallel relation to the axis thereof passing freely through the annular portions of the face 18 of lens B between the respective tubular deflectors 23 and 24and the ring like portion 20. The central portion of the rays wnich pro ect forwardly from the bulb 19 are caused to project directly through the circular space 31 of the face 18 situated within the interior of the tubular deflector Since only a small proportion of such rays are allowed to pass directly through the lens, the upwardly directed portion thereof is very small and at the same time due to the diameter of the said deflector, the upward inclination of the same is so slight as. to prevent the same from reaching the. vision of approaching drivers and pedestrians. The remaining portion of the ravs of light emanating in an outward direction and directed upwardly are intercepted by the mirrors 25 and 26 of the ,deflectors 23 and Q l and caused to be deflected downwardly and out of vision. Due to the frosting of the ring like portion QO, the small percentage of direct rays reaching the same are caused to be diffused along the frosted surface 27 so as to eliminate the glare therefrom. The downwaroly exten from the bulb 19 pass through the lower halves of the tubular deflectors 23 and ll, where they strike the road and serve in the desired manner. In the particular form of the invention 1 have shown the lower surface of said deflectors as frosted so that rays pass ing therethrough are diffused. It can however, readily be comprehended that said lower halves may be made of clear glass so as to allow the free passage of the light therethrough, or the same may be entirely omitted, if found preferable. The portion of the rays passing through the clear part of the ring like portion 20 are directed to the side of the.
road wherethe sameilluminate the curb and the gutter, while the motor vehicle is travelling, so as to enable the operator to have a clear vision of the side of the road as well as the road ahead of him.
The invention provides a simple and efl'ecive head light lens adapted to minimize the glare from the reflector and source of. light wi hout appreciably diminishing the amount of light passing through the lens. This has the effect of increasing the ehiciency ofthe head light while at the same time permits a safe approach to'the vehicle. By means of the ring like portion formed on the lens, sufiicient light may be cast to the side of the road as to illuminate the gutter or curb and inform the driver of the condition of the side of the road as well as of the road in front of him.
Changes in the specific form of my inven tion, as herein disclosed, may be made within one scope of what is claimed without departing from the spirit of my invention.
Having described my invention, what I claim as new and desireto protect by Letters Patent is l. A head light lens comprising a flangefor attachment inv a lens holder, a. ring like port-i n connected witlr said flange and issu ing outwardly beyond the lens holder, a circular plate connectedwith. said ring. like portion and pair of concentric tubular deflectors centrally situatedwith respect to said plate and ring like portion, said deflectors isaway from said plate and toward the source of light, the larger of said deflectors being longer than said ring like portion, and the smaller of said. deflectors being longer than the larger deflector, both of said deflectors being. formed with mirrors upon the urfaces of the upper halves. thereof for causlight rays approaching the same to-be delected downwardly.
1119115 comprising a circular plate and a tubular deflector concentrically positioned relative thereto and issuing away from said plate tOVcl'd the source of light, said tubular deflector being. formed with a mirror upon t 1e surface of the upper half thereof for defleeting rays of light approaching the same along the interior thereof in a downward direction, the lower half of said deflector'being formed translucent.
In testimony whereof, I have signed my name to this specification.
HENRY M. NELSON.
US14007026 1926-10-07 1926-10-07 Lens Expired - Lifetime US1735209A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999924A (en) * 1957-09-10 1961-09-12 Mottier Felix Anti-fog lighting projector
US3052794A (en) * 1959-12-07 1962-09-04 Smitheraft Corp Illuminated ceiling
US4722023A (en) * 1984-05-15 1988-01-26 Koito Seisakusho Co., Ltd. Lamp assembly for emitting a beam of light at an angle to its optical axis
US5860735A (en) * 1994-07-22 1999-01-19 Keech; Charles A. Light glare reducing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999924A (en) * 1957-09-10 1961-09-12 Mottier Felix Anti-fog lighting projector
US3052794A (en) * 1959-12-07 1962-09-04 Smitheraft Corp Illuminated ceiling
US4722023A (en) * 1984-05-15 1988-01-26 Koito Seisakusho Co., Ltd. Lamp assembly for emitting a beam of light at an angle to its optical axis
US5860735A (en) * 1994-07-22 1999-01-19 Keech; Charles A. Light glare reducing device

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