US3221200A - Plural reflector headlamp device - Google Patents

Plural reflector headlamp device Download PDF

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Publication number
US3221200A
US3221200A US169764A US16976462A US3221200A US 3221200 A US3221200 A US 3221200A US 169764 A US169764 A US 169764A US 16976462 A US16976462 A US 16976462A US 3221200 A US3221200 A US 3221200A
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US
United States
Prior art keywords
support
reflector
lamp
current supply
supply members
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
US169764A
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English (en)
Inventor
Verbeek Leo Henricus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
North American Philips Co Inc
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US Philips Corp
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Filing date
Publication date
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Publication of US3221200A publication Critical patent/US3221200A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • 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
    • 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
    • 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
    • F21S41/10—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
    • F21S41/164—Incandescent light sources, e.g. filament or halogen lamps having two or more filaments
    • 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
    • F21S41/166—Incandescent light sources, e.g. filament or halogen lamps characterised by the shape of the filament
    • 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
    • F21S41/168—Incandescent light sources, e.g. filament or halogen lamps having a filament arranged transversally to the optical axis of the illuminating device
    • 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
    • F21S41/29—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
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • 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
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • 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
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity at the junction between adjacent areas
    • 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
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • 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
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/40—Leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated

Definitions

  • the lamp body comprises a cover glass and a support for members passing through to supply current to the lamp elements emitting light the cover glass and the support being secured together along their edges.
  • the said support is partly in the form of a concave reflector.
  • This support which generally is made from moulded glass, has to be shaped in a prescribed form to enable it to perform its reflect-ing function satisfactorily. It has been found in practice that in these reflector lamps the reflecting parts of the support show local differences from the prescribed shape. These differences occur in particular at the edges of the reflecting part and at the points at which the current supply members pass through the relevant reflecting part of the support. Hence, a certain part of the surface of these reflectors provides substantially no contribution to the prescribed production of the light beams.
  • a reflector lamp of the above mentioned kind is characterized in that the current supply members are led in through the reflector body at points beside the support portions designed as reflectors.
  • the lead-in apertures for the current supply members are not made in portions of the support which are of essential importance for the required beam production.
  • these apertures may be located in zones of the support which need not satisfy special requirements with respect to lighting technology.
  • the resulting gain in useful reflecting surface proves to be such that, without increasing the outer diameter of the reflector lamp, a construction can be obtained which, instead of a single reflector comprises three reflectors arranged side by side, which obviously have smaller diameters and are adapted to co-operate each with its own light emitting element.
  • Comparative experiments have shown that a reflector lamp in accord ance with the invention having an outer diameter d and comprising three reflectors each co-operating with its own light emitting element, from a point of view of lighting technology is at least equivalent to three separate reflectors each having the same diameter d and co-operating each with its own light emitting element. Consequently, a lighting system of considerably improved quality can be obtained within the given dimensions of the relevant par-ts of the front of a motor-car.
  • transition zone between the reflecting portion of the lamp and the adjacent generally flat portion of the support is responsible "ice for additional inaccuracies in the practical shape of the support.
  • this may be elfectively overcome if in such a lamp comprising a number of portions designed as reflectors, which co-operate each with at least one light emitting element, the transitions in the form of parts of circles between at least two of the reflecting portions of the support and the remainder of the support together'form a single closed line, the points at which the current supply members are passed through the reflector body being located in the support outside this line.
  • projections provided on the support for orienting the lamp which may serve for correctly positioning the lamp when it is inserted in a suitable holder, are located near the points at which the current-supply members are led through the support.
  • Such orienting projections may give rise to non-reproducible discrepancies in the shape of adjacent parts of the moulded glass body owing to local discontinuities in the thickness of the glass.
  • the points at which the current supply members are sealed through the support are spaced by comparatively large distances from the centre.
  • the points at which the current supply members are sealed through the support are spaced by comparatively large distances from the centre.
  • the lightemitting elements may be designed in different manners.
  • the entire space formed by the support and the cover glass may be used as lamp space and hence may be evacuated and, if required, filled with gas. In this event, one or a number of filaments operate in one space.
  • the light-emitting elements may be small separate incandescent lamps, for example iodine lamps, or discharge tubes, so that each filament operates in a separate envelope.
  • the light-emitting elements may be attached to the current supply members so as to be capable of being exchanged, and in this case the cover glass has to be detachable.
  • the reflector lamp in accordance with the invention will be designed so that it comprises at least two surfaces arranged side by side in the support which act as reflectors and cooperate each with a light emitting element.
  • the cover glass and/or the reflector may be profiled so that the light is concentrated or dispersed to a certain extent.
  • FIGURES 1 and 2 are a longitudinal sectional view and a front elevation respectively of a known reflector lamp with detached cover glass.
  • FIGURES 3 and 4 are a longitudinal sectional view and a front elevation respectively of an embodiment of the reflector lamp in accordance with the invention with the cover glass removed.
  • the known reflector lamp shown in FIGURES 1 and 2 has an envelope comprising a support 10 and a cover glass 11.
  • the two par-ts are moulded from glass and are fused to one another along rims 12 and 13 of the facing surfaces.
  • Three current supply members 14, 15 and 16 are passed through the support.
  • the said members comprise contact points 14*, 15 and 16 respectively which within the lamp merge into filament supports 14 15 and 16 respectively.
  • a filament 17 is mounted on the filaments supports 14 and 15 and a filament 18 is supported by the supports 15 and 16'.
  • Each current supply member is passed through an aperture in the support these leads-ins being sealed in a gas-tight manner by metal caps 19, 2t) and 21, the sharp rims of which are sealed in a thickened part of the reflector body 10.
  • the main filament 18 extends along the axis XX of the lamp so that its central part lies in the focus F of the parabolic inner surface 22 of the support 10 which is provided with a reflecting layer.
  • the dimming filament 17 extends above the axis XX at right angles thereto.
  • the support 10 is not provided with the apertures for leading through the current supply members, but these apertures are subsequently made by punching, the metal caps 19, 20 and 21 being secured to the support when the current supply members have been passed through.
  • the marginal portion of the parabolic surface 22 does not entirely comply with the described dimensions owing to the transition between the parabolic portion 22 and the rim 12. This portion with reduced optical properties lies about between a circle 26 shown as broken line and a sharp transition 27 between the parabolic portion 22 of the support and its rim 12.
  • Orienting projections 28, 29 and 30 are provided on the rearside of the rim 12. As FIGURE 1 shows, these projections are thickened par-ts of the rim 12. These projections also adversely affect the shape of the inner surface 22 of the support 10; the reflector portions of reduced quality are shown in FIGURE 2 by more or less triangular zones 31, 32 and 33 shown by broken lines.
  • FIGURE 1 shows that a comparatively large part of the theoretically available reflector surface 22 is not shaped in the required form and consequently does not contribute to the beam production in the required manner.
  • the reflector lamp shown in these figures comprises a support 50 and a cover glass 51 fused to one another at the facing surfaces of rims 52 and 53.
  • the support and the cover are both moulded from glass.
  • the lamp shown contains three filaments, two filaments 54 and 55 extending horizontally and the third filament 56 extending obliquely. All three filaments are coiled.
  • sickle-shaped flat portions 61, 62 and 63 are left which lie beside the support portions acting as reflectors and in which according to the invention at points 64, 65, 66 and 67 currents supply members for the filaments are led through.
  • the sickle-shaped portions may be utilized as locations for orienting projections 68, 69 and 70.
  • a connection for the exhaust tube of the lamp is provided at the centre.
  • the external current supply pins are spaced from the axis Y-Y of the lamp. Either a holder may be used which is adapted to receive these pins or converging leads may be applied to the rear side of the support 50 which connect the current supply members passed through the support to contact pins nearer the centre.
  • FIGURE 4 clearly shows that the adverse effects produced in the shape of the support by the lead-ins of the current supply members are entirely eliminated. Similarly, the presence of the orienting projections does not adversely affect the shape of the support portions acting as reflectors. Only near the rim 52 each reflector 57, 58 and 59 has a narrow zone (72, 73 and 74 respectively) indicated by a broken line, in which the quality of the reflecting surface does not entirely correspond to the theoretical shape.
  • each filament may co-operate with a separate reflector without the need for making compromises in shaping the reflector in view of the presence of another filament having to co-operate with the same reflector.
  • the lamp shown in FIGURES 3 and 4 is intended to form, together with a similar reflector lamp, a motor car lighting system having a main beam and an asymmetrical dipped beam.
  • the main beam may be obtained by switching into circuit the filaments 54 and 55 in both lamps, the filament 54 producing the widely dispersed base portion of the beam pattern and the filament 55 producing a superimposed higher and less dispersed portion.
  • the filament 54 remains operative but on its beam is superimposed the oblique dipped beam produced by switching the filament 56 into circuit.
  • the invention may also be used if the number of reflectors in the reflector lamp diflers from the number three.
  • the invention may be of special importance for the construction of a reflector lamp comprising one filament co-opera-ting with one reflector.
  • a sealed reflector lamp comprising a cover glass, a plurality of light-emitting members in said reflector, a plurality of current supply members connected to lightemitting members, a support for said current-supply members, said support and said cover glass being sealed together at their peripheral rims, said support having at least two portions thereof in the form of concave reflectors, said current supply members being led through said support surface only between the reflector portions thereof and the peripheral rims of said cover glass and support.
  • a sealed reflector lamp comprising a cover glass, a plurality of light-emitting members in said reflector, a plurality of current supply members connected to lightemitting members, a support for said current-supply members, said support and said cover glass being sealed together at their peripheral rims, said support having at least two portions thereof in the form of discontinuous, circularly-shaped concave reflectors, each concave reflector having a light-emitting member coacting therewith, said concave reflectors together forming an Outline of a single closed line, and said current supply members being led through said support surface at points outside said single closed line.
  • a sealed lamp as claimed in claim 1 further comprising orienting projections on said support adjacent to the points where said current supply members are led through said support surface.
  • a sealed reflector lamp comprising a cover glass, a plurality of light-emitting members in said reflector, a plurality of current supply members connected to lightemitting members, a support for said current supply members, said support and said cover glass being sealed together at their peripheral rims, said support having three portions thereof in the form of discontinuous, circularlyshaped concave reflectors, said current supply members being led through said support surface only between the References Cited by the Examiner UNITED STATES PATENTS 2,543,093 2/1951 Braunsdorfl 313-115 JOHN W. HUCKERT, Primary Examiner.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
US169764A 1961-02-07 1962-01-30 Plural reflector headlamp device Expired - Lifetime US3221200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL260918 1961-02-07

Publications (1)

Publication Number Publication Date
US3221200A true US3221200A (en) 1965-11-30

Family

ID=19752861

Family Applications (1)

Application Number Title Priority Date Filing Date
US169764A Expired - Lifetime US3221200A (en) 1961-02-07 1962-01-30 Plural reflector headlamp device

Country Status (6)

Country Link
US (1) US3221200A (es)
CH (1) CH414012A (es)
DE (2) DE1154572B (es)
ES (1) ES274300A1 (es)
GB (1) GB961452A (es)
NL (1) NL260918A (es)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543093A (en) * 1948-12-28 1951-02-27 Tung Sol Lamp Works Inc Electric lamp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR929289A (fr) * 1941-05-10 1947-12-22 Pathe Cinema Lampe de projection à incandescence avec réflecteur

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543093A (en) * 1948-12-28 1951-02-27 Tung Sol Lamp Works Inc Electric lamp

Also Published As

Publication number Publication date
DE1154572B (de) 1963-09-19
DE1891863U (de) 1964-04-30
ES274300A1 (es) 1962-04-01
CH414012A (de) 1966-05-31
NL260918A (es)
GB961452A (en) 1964-06-24

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