US3622778A - Vehicle headlamp with two light sources - Google Patents

Vehicle headlamp with two light sources Download PDF

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Publication number
US3622778A
US3622778A US780978A US3622778DA US3622778A US 3622778 A US3622778 A US 3622778A US 780978 A US780978 A US 780978A US 3622778D A US3622778D A US 3622778DA US 3622778 A US3622778 A US 3622778A
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reflector
main
plane
auxiliary
lamp
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US780978A
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Pierre Cibie
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Cibie Projecteurs SA
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Cibie Projecteurs SA
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    • 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
    • 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
    • F21S41/321—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
    • F21S41/39—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
    • F21S41/40—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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources

Definitions

  • U.S. Cl 240/4135 240/4125, 240/44 R ABSTRACT A main parabolic reflector has an iodine lamp [5 l 1 Int. located in fyont of the reflector focal point A F21V 7/116 element below the lamp defines a plane below which no light of Search from the lamp trikes the reflector An auxiliary reflector hay. 44, 44-1, 41 41-35 ing an aperture substantially one halfthat ofthe main reflector has a second iodine lamp at its focal point.
  • references Cited the auxiliary reflector is spaced from the vertical axis of the UNTTED STATES PATENTS main reflector, and the aperture of the auxiliary reflector is 1,357,761 11 192 0 i 3 rown..
  • This invention relates to vehicle headlamps with two light sources, each source cooperating with a reflector to provide an individual light beam.
  • Headlamps of this type have long been known in principle, in particular in their French Pat. No. 1,499,176 the applicants described such a headlamp using a main reflector cooperating with a light source with two filaments providing at the same time dipped beam and main beam, and a secondary reflector of smaller aperture than the main reflector housed in the main reflector and cooperating with a light source to produce a main beam.
  • the present invention relates to a headlamp of this type which takes into account the following considerations:
  • a reflector constituted by a body of revolution advantageously having a diameter of aperture in the order of 160 to 180 mm., both for optimum illumination and for reduction of dazzle,
  • halogen lamps give an excellent distribution of light and are therefore to be preferred to standard lamps
  • the headlamp according to the invention makes it possible to achieve all these advantageous results.
  • a vehicle headlamp comprising a main reflector for providing a dipped beam and constituted by a paraboloid of revolution cooperating with an iodine lamp placed slightly in front of the reflector focal point, and with which a masking element is associated for defining the plane of cutout of the clipped beam, and an auxiliary reflector for providing a main beam and constituted by a paraboloid of revolution with an aperture equal to substantially half that of the main reflector and being disposed in the lower part of the main reflector so as to cooperate with an iodine lamp placed at its focal point, the axis of the auxiliary reflector being laterally displaced in relation to a vertical plane passing through the central axis of the main reflector so that the aperture of the auxiliary reflector is below the plane of cutout and substantially tangential to the plane or planes of cutout defined by the masking element.
  • the auxiliary reflector is mounted on the lower part of the main reflector so as to be adjustable in height.
  • FIG. 1 shows a headlamp according to the invention in diagrammatic, axial, vertical section
  • FIG. 2 is a diagrammatic front view of the head lamp.
  • the headlamp according to the invention comprises a main reflector l, traversed by the axis AA, which constitutes the main fore-and-aft axis of the headlamp.
  • An iodine lamp 2 is disposed slightly in front of the focal point F of the reflector 1,
  • a masking element 3 defining a plane of cutout CAC (FIG. 2).
  • plane of cutout is meant in the usual manner, the axial plane or the two axial planes passing through the lateral parts of the screen 3.
  • the light beam which is interrupted by the screen 3 and which is reflected by the upper part of the main reflector l is a dipped beam, the rays of which are directed downwards, and which is limited by the plane of cutout CAC'-
  • a reflector 4 constituted by a paraboloid of revolution the diameter of which is substantially equal to half that of the reflector l.
  • the axis BB of this reflector 4 is displaced laterally by distance d in relation to the vertical plane passing through AA in such a way that the shape of aperture 4a of the reflector 4 is substantially tangential to the plane of cutout CAC and is located below it. This ensures that no ray coming from the lamp 2 and reflected by the reflector l is intercepted by the auxiliary reflector 4.
  • An iodine lamp 5, the light source 5a of which is at the focal point of the reflector 4 provides a main beam.
  • the reflector 4 is mounted on the lower part of the reflector l, by means of an appliance 6 mounted on the reflector l by flexible screwing means 7 and a control screw 8, thus making possible tilting of the axis BB, and consequently a regulation of the height of the main beam.
  • the diameter of reflector 4 is limited, since at most its aperture 4a must be tangent to the plane of cutout CAC'. If the aperture were larger, so that it extended above plane CAC, rays from reflector 1 would be intercepted by reflector 4.
  • the screen 3 By arranging the screen 3 so that the plane of cutout CAC is oblique to a horizontal side-to-side axis of reflector l, as shown in FIG. 2, and spacing the vertical axis of reflector 4 laterally from a vertical plane passing through axis AA, it will be appreciated that aperture 4a of reflector can be made larger than if spacing d did not exist.
  • reflector 4 is large enough to produce a broad main beam without interfering with rays from reflector 1.
  • a vehicle headlamp comprising a. a main reflector for providing a dipped beam, said reflector having the shape of a paraboloid,
  • a masking element beneath said lamp and defining a plane of cutout below which no light is received from said main reflector, said masking element being arranged so that the plane of cutout is oblique to a horizontal side-toside axis of said main reflector which passes through the front-to-rear axis of said main reflector,
  • an auxiliary reflector for providing a main beam, said reflector having the shape of a paraboloid, the vertical axis of said auxiliary reflector being laterally spaced from a vertical plane containing the vertical axis of said main reflector, and the aperture of said auxiliary reflector being below and tangent to said plane of cutout and e. a lamp located at the focal point of said auxiliary reflector.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

A main parabolic reflector has an iodine lamp located slightly in front of the reflector focal point. A masking element below the lamp defines a plane below which no light from the lamp strikes the reflector. An auxiliary reflector having an aperture substantially one half that of the main reflector has a second iodine lamp at its focal point. The vertical axis of the auxiliary reflector is spaced from the vertical axis of the main reflector, and the aperture of the auxiliary reflector is tangent to the plane defined by the mask.

Description

United States Patent (111 3,622,778
[72] Inventor PlerreCibie l,798,l32 3/l93l Bredsvold 240/4135 Paris, France 2,020,130 [1/1935 Astor 240/4125 X [2]] Appl. No. 780,978 2,122,465 7/1938 Graves 240/4125 :iled d 2 23% FOREIGN PATENTS 1 i 580,397 8/l924 France 240/41 [731 Cibie 1,499,176 9/1967 France 240/4135 Boblgny, France [32] Priority Dec. 19, 1967 Primary Examiner-Samuel S. Matthews 33 France Assistant Examiner-Robert P. Greiner [31] 132,870 AnorneyBreitenfeld & Levine [54] VEHICLE HEADLAMP WITH TWO LIGHT SOURCES 2 Claims, 2 Drawing Figs.
[52] U.S. Cl 240/4135 240/4125, 240/44 R ABSTRACT: A main parabolic reflector has an iodine lamp [5 l 1 Int. located in fyont of the reflector focal point A F21V 7/116 element below the lamp defines a plane below which no light of Search from the lamp trikes the reflector An auxiliary reflector hay. 44, 44-1, 41 41-35 ing an aperture substantially one halfthat ofthe main reflector has a second iodine lamp at its focal point. The vertical axis of 156] References Cited the auxiliary reflector is spaced from the vertical axis of the UNTTED STATES PATENTS main reflector, and the aperture of the auxiliary reflector is 1,357,761 11 192 0 i 3 rown..
tangent to the plane defined by the mask.
This invention relates to vehicle headlamps with two light sources, each source cooperating with a reflector to provide an individual light beam.
Headlamps of this type have long been known in principle, in particular in their French Pat. No. 1,499,176 the applicants described such a headlamp using a main reflector cooperating with a light source with two filaments providing at the same time dipped beam and main beam, and a secondary reflector of smaller aperture than the main reflector housed in the main reflector and cooperating with a light source to produce a main beam.
The present invention relates to a headlamp of this type which takes into account the following considerations:
a. For producing a dipped beam, it is preferable to use a reflector constituted by a body of revolution advantageously having a diameter of aperture in the order of 160 to 180 mm., both for optimum illumination and for reduction of dazzle,
b. halogen lamps give an excellent distribution of light and are therefore to be preferred to standard lamps,
c. when main beam is changed to dipped beam, or vice versa, the surrounding illumination, close to the vehicle, should remain as constant as possible,
(I. it is advisable to avoid any stray rays which could be caused by interception by the auxiliary reflector of the beam reflected by the main reflector, while retaining as broad a beam as possible.
The headlamp according to the invention makes it possible to achieve all these advantageous results.
According to the present invention, there is provided a vehicle headlamp comprising a main reflector for providing a dipped beam and constituted by a paraboloid of revolution cooperating with an iodine lamp placed slightly in front of the reflector focal point, and with which a masking element is associated for defining the plane of cutout of the clipped beam, and an auxiliary reflector for providing a main beam and constituted by a paraboloid of revolution with an aperture equal to substantially half that of the main reflector and being disposed in the lower part of the main reflector so as to cooperate with an iodine lamp placed at its focal point, the axis of the auxiliary reflector being laterally displaced in relation to a vertical plane passing through the central axis of the main reflector so that the aperture of the auxiliary reflector is below the plane of cutout and substantially tangential to the plane or planes of cutout defined by the masking element.
Preferably, the auxiliary reflector is mounted on the lower part of the main reflector so as to be adjustable in height.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 shows a headlamp according to the invention in diagrammatic, axial, vertical section, and
FIG. 2 is a diagrammatic front view of the head lamp.
The headlamp according to the invention comprises a main reflector l, traversed by the axis AA, which constitutes the main fore-and-aft axis of the headlamp. An iodine lamp 2 is disposed slightly in front of the focal point F of the reflector 1,
and below the light source 2a of this lamp 2 there is arranged a masking element 3 defining a plane of cutout CAC (FIG. 2). By plane of cutout" is meant in the usual manner, the axial plane or the two axial planes passing through the lateral parts of the screen 3. The light beam which is interrupted by the screen 3 and which is reflected by the upper part of the main reflector l is a dipped beam, the rays of which are directed downwards, and which is limited by the plane of cutout CAC'- There is associated with the reflector I a reflector 4, constituted by a paraboloid of revolution the diameter of which is substantially equal to half that of the reflector l. The axis BB of this reflector 4 is displaced laterally by distance d in relation to the vertical plane passing through AA in such a way that the shape of aperture 4a of the reflector 4 is substantially tangential to the plane of cutout CAC and is located below it. This ensures that no ray coming from the lamp 2 and reflected by the reflector l is intercepted by the auxiliary reflector 4. An iodine lamp 5, the light source 5a of which is at the focal point of the reflector 4 provides a main beam.
Preferably the reflector 4 is mounted on the lower part of the reflector l, by means of an appliance 6 mounted on the reflector l by flexible screwing means 7 and a control screw 8, thus making possible tilting of the axis BB, and consequently a regulation of the height of the main beam.
The diameter of reflector 4 is limited, since at most its aperture 4a must be tangent to the plane of cutout CAC'. If the aperture were larger, so that it extended above plane CAC, rays from reflector 1 would be intercepted by reflector 4. By arranging the screen 3 so that the plane of cutout CAC is oblique to a horizontal side-to-side axis of reflector l, as shown in FIG. 2, and spacing the vertical axis of reflector 4 laterally from a vertical plane passing through axis AA, it will be appreciated that aperture 4a of reflector can be made larger than if spacing d did not exist. Thus, reflector 4 is large enough to produce a broad main beam without interfering with rays from reflector 1.
What is claimed is:
1. A vehicle headlamp comprising a. a main reflector for providing a dipped beam, said reflector having the shape of a paraboloid,
b. a lamp located in front of the focal point of said main reflector,
c. a masking element beneath said lamp and defining a plane of cutout below which no light is received from said main reflector, said masking element being arranged so that the plane of cutout is oblique to a horizontal side-toside axis of said main reflector which passes through the front-to-rear axis of said main reflector,
d. an auxiliary reflector for providing a main beam, said reflector having the shape of a paraboloid, the vertical axis of said auxiliary reflector being laterally spaced from a vertical plane containing the vertical axis of said main reflector, and the aperture of said auxiliary reflector being below and tangent to said plane of cutout and e. a lamp located at the focal point of said auxiliary reflector.
2. A vehicle headlamp as claimed in claim 1, in which the auxiliary reflector is adjustably mounted on the main reflector.

Claims (2)

1. A vehicle headlamp comprising a. a main reflector for providing a dipped beam, said reflector having the shape of a paraboloid, b. a lamp located in front of the focal point of said main reflector, c. a masking element beneath said lamp and defining a plane of cutout below which no light is received from said main reflector, said masking element being arranged so that the plane of cutout is oblique to a horizontal side-to-side axis of said main reflector which passes through the front-to-rear axis of said main reflector, d. an auxiliary reflector for providing a main beam, said reflector having the shape of a paraboloid, the vertical axis of said auxiliary reflector being laterally spaced from a vertical plane containing the vertical axis of said main reflector, and the aperture of said auxiliary reflector being below and tangent to said plane of cutout and e. a lamp located at the focal point of said auxiliary reflector.
2. A vehicle headlamp as claimed in claim 1, in which the auxiliary reflector is adjustably mounted on the main reflector.
US780978A 1967-12-19 1968-12-04 Vehicle headlamp with two light sources Expired - Lifetime US3622778A (en)

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FR132870 1967-12-19

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DE (2) DE6811823U (en)
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870876A (en) * 1972-10-25 1975-03-11 Cibie Projecteurs Motor vehicle headlamp
US3878389A (en) * 1973-04-11 1975-04-15 Cibie Projecteurs Twin illumination type headlight
US3892960A (en) * 1973-04-04 1975-07-01 Rotaflex Ltd Light projector fittings
US3908144A (en) * 1974-06-03 1975-09-23 Eugene D Rudd Headlight
US3931511A (en) * 1973-12-12 1976-01-06 Cibie Projecteurs Vehicle headlamps
US4502103A (en) * 1982-07-30 1985-02-26 Collins Dynamics Light with mount for plural lamp bulbs
US4587601A (en) * 1981-07-23 1986-05-06 Collins Dynamics, Inc. Combined flood and spot light incorporating a reflector member of circular and parabolic longitudinal cross section
US4755916A (en) * 1981-07-23 1988-07-05 Collins Dynamics Combined flood and spot light
US4895693A (en) * 1987-09-30 1990-01-23 Koito Seisakusho Co., Ltd. Headlight of motor vehicle
US5353203A (en) * 1992-11-13 1994-10-04 Robert Bosch Gmbh Headlight for a vehicle
EP1867914A1 (en) 2006-06-15 2007-12-19 Valeo Vision Headlight with dual light source for an automobile vehicle
US9964281B2 (en) 2014-08-01 2018-05-08 Coast Cutlery Co. Dual focus flashlight

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1357761A (en) * 1920-11-02 Headlight replacement
FR580397A (en) * 1924-11-05
US1798132A (en) * 1928-04-25 1931-03-31 Paul A Bredsvold Automobile head lamp
US2020130A (en) * 1931-05-04 1935-11-05 Gen Electric Vehicle headlight lamp
US2122465A (en) * 1934-03-20 1938-07-05 Graves Arnold Light-projection system particularly for vehicle lamps
FR1499176A (en) * 1966-06-06 1967-10-27 Cibie Projecteurs Dual Reflector Automotive Headlamps Improvements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1357761A (en) * 1920-11-02 Headlight replacement
FR580397A (en) * 1924-11-05
US1798132A (en) * 1928-04-25 1931-03-31 Paul A Bredsvold Automobile head lamp
US2020130A (en) * 1931-05-04 1935-11-05 Gen Electric Vehicle headlight lamp
US2122465A (en) * 1934-03-20 1938-07-05 Graves Arnold Light-projection system particularly for vehicle lamps
FR1499176A (en) * 1966-06-06 1967-10-27 Cibie Projecteurs Dual Reflector Automotive Headlamps Improvements

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870876A (en) * 1972-10-25 1975-03-11 Cibie Projecteurs Motor vehicle headlamp
US3892960A (en) * 1973-04-04 1975-07-01 Rotaflex Ltd Light projector fittings
US3878389A (en) * 1973-04-11 1975-04-15 Cibie Projecteurs Twin illumination type headlight
US3931511A (en) * 1973-12-12 1976-01-06 Cibie Projecteurs Vehicle headlamps
US3908144A (en) * 1974-06-03 1975-09-23 Eugene D Rudd Headlight
US4587601A (en) * 1981-07-23 1986-05-06 Collins Dynamics, Inc. Combined flood and spot light incorporating a reflector member of circular and parabolic longitudinal cross section
US4755916A (en) * 1981-07-23 1988-07-05 Collins Dynamics Combined flood and spot light
US4502103A (en) * 1982-07-30 1985-02-26 Collins Dynamics Light with mount for plural lamp bulbs
US4895693A (en) * 1987-09-30 1990-01-23 Koito Seisakusho Co., Ltd. Headlight of motor vehicle
US5353203A (en) * 1992-11-13 1994-10-04 Robert Bosch Gmbh Headlight for a vehicle
EP1867914A1 (en) 2006-06-15 2007-12-19 Valeo Vision Headlight with dual light source for an automobile vehicle
FR2902497A1 (en) 2006-06-15 2007-12-21 Valeo Vision Sa LIGHT SOURCE LIGHTING PROJECTOR FOR MOTOR VEHICLE
US9964281B2 (en) 2014-08-01 2018-05-08 Coast Cutlery Co. Dual focus flashlight

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Publication number Publication date
DE6811823U (en) 1970-10-15
FR1558996A (en) 1969-03-07
DE1815181A1 (en) 1969-11-20
GB1252145A (en) 1971-11-03

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