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DE1084835B - Two-filament light bulb for headlights of motor vehicles - Google Patents

Two-filament light bulb for headlights of motor vehicles

Info

Publication number
DE1084835B
DE1084835B DEB47835A DEB0047835A DE1084835B DE 1084835 B DE1084835 B DE 1084835B DE B47835 A DEB47835 A DE B47835A DE B0047835 A DEB0047835 A DE B0047835A DE 1084835 B DE1084835 B DE 1084835B
Authority
DE
Germany
Prior art keywords
filament
dipped
incandescent lamp
screen
optical axis
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.)
Pending
Application number
DEB47835A
Other languages
German (de)
Inventor
Dipl-Ing Gerhard Lindae
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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.)
Filing date
Publication date
Priority to NL126154D priority Critical patent/NL126154C/xx
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DEB47835A priority patent/DE1084835B/en
Priority to CH6930959A priority patent/CH372104A/en
Priority to US792389A priority patent/US3083315A/en
Priority to GB4627/59A priority patent/GB898612A/en
Priority to FR786343A priority patent/FR1224989A/en
Publication of DE1084835B publication Critical patent/DE1084835B/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
    • 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
    • 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
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • 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
    • F21S41/30—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
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors 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
    • F21S41/36—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
    • 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
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

DEUTSCHESGERMAN

Die Erfindung bezieht sich auf eine für Kraftfahrzeugscheinwerfer geeignete Glühlampe mit einer ein Abblendlicht liefernden Lichtquelle, welche vor dem Brennpunkt eines Hohlspiegels anzuordnen ist, sich etwas seitlich und oberhalb der optischen Achse befindet und zum Teil gegen den Hohlspiegel hin durch einen Schirm abgedeckt ist. Dieser Schirm bewirkt, daß beim Einschalten des Abblendlichtes ein nach abwärts gerichtetes Lichtbündel mit einer mindestens nach der Seite des Gegenverkehrs hin waagerechten Helldunkelgrenze entsteht. Die bisher in derartigen Lampen verwendeten Schirme beeinträchtigen jedoch die Lichtausbeute empfindlich.The invention relates to one for motor vehicle headlights suitable incandescent lamp with a light source delivering a low beam, which is located in front of the The focal point of a concave mirror is to be arranged, is located slightly to the side and above the optical axis and is partially covered by a screen against the concave mirror. This screen causes that when switching on the low beam a downward light beam with at least one on the side of the oncoming traffic there is a horizontal light-dark border. So far in such However, the screens used in lamps have a negative impact on the light output.

Dieser Nachteil wird durch den Erfindungsgegenstand vermieden. Die Erfindung besteht darin, daß der Abblendschirm die Form eines schmalen, mindestens die Breite des Durchmessers der Abblendglühwendel aufweisenden Bandes hat, welches sich etwa senkrecht zu einer horizontalen Ebene durch die optische Achse im wesentlichen parallel zur Abblendglühwendel erstreckt und sich in Brennpunktnähe gegen die Achse der Abblendglühwendel hin und etwa parallel zum entsprechenden Teil der Reflektorwandung krümmt. Bandförmige Abschirmungen an der Außenwand der Lampe und trogförmige Abblendschirme am Abblendglühfaden im Innern der Lampe mit asymmetrischen Ausschnitten sind zwar bekannt, jedoch läßt sich mit solchen Lampen in dem vom Hohlspiegel reflektierten Abblendlichtbündel nicht eine nur auf einen kleinen Sektor, in dem die Blendung eines entgegenkommenden Fahrers hervorgerufen werden kann, begrenzte Schattenzone mit deutlich ausgeprägter Helldunkelgrenze abzeichnen. Durch diese Ausgestaltung des Abblendschirmes, welcher der oberhalb der optischen Mitte des Scheinwerfers und etwas seitlich verschoben angeordneten Abblendlichtquelle zugeordnet ist, wird erreicht, daß das von dieser Lichtquelle ausgestrahlte und vom Hohlspiegel reflektierte Licht besonders günstig verteilt wird. Der Bereich größter Lichtstärke erstreckt sich nämlich über die zu befahrende Fahrbahnseite und den äußeren Fahrbahnrand, während die dem Gegenverkehr zugewandte Fahrbahn wesentlich schwächeres Licht erhält, das keine Blendwirkungen hervorruft. Da von dem gesamten ausgestrahlten Lichtbündel nur ein kleiner Sektor durch den schmalen Schirm abgeschattet wird, läßt sich eine nahezu vollkommene Lichtausnutzung erreichen. Die durch den Erfindungsgegenstand bewirkte günstige Lichtverteilung ermöglicht auch beim Einschalten der Abblendlichtquelle eine hohe Fahrgeschwindigkeit, da hierbei störende Blendwirkungen auf der Gegenfahrbahn vermieden und die Sichtverhältnisse über die vor dem Fahrzeug befindliche Fahrbahnseite wesentlich verbessert werden.This disadvantage is avoided by the subject matter of the invention. The invention consists in that the dimming screen is in the form of a narrow, at least the width of the diameter of the dimming filament having band, which extends approximately perpendicular to a horizontal plane through the optical axis extends essentially parallel to the low-beam filament and near the focal point towards the axis of the low-beam filament and approximately parallel to the corresponding part of the reflector wall bends. Ribbon-shaped shields on the outer wall of the lamp and trough-shaped anti-glare shields on the dipped filament inside the lamp with asymmetrical cutouts are known however, with such lamps in the low beam reflected by the concave mirror, one cannot only on a small sector in which the dazzling of an oncoming driver caused can be drawn, a limited shadow zone with a clearly defined light-dark border. Through this Design of the dimming screen, which of the above the optical center of the headlight and something is assigned laterally displaced arranged low beam, it is achieved that this Light source emitted and reflected by the concave mirror light is distributed particularly favorably. The area The greatest light intensity extends over the side of the road to be driven on and the outer one The edge of the lane, while the lane facing the oncoming traffic receives much weaker light, that does not cause any glare. Since only one of the entire beam of light emitted If a small sector is shaded by the narrow screen, an almost perfect one can be achieved Achieve light utilization. The favorable light distribution brought about by the subject matter of the invention is made possible a high driving speed even when switching on the low beam source, as this is disruptive Glare effects on the opposite lane are avoided and the visibility of the one in front of the vehicle is avoided Road side can be significantly improved.

Zweifadenglühlampe für Scheinwerfer
von KraftfahrzeugenTwo-filament light bulb for headlights
of motor vehicles

Anmelder:Applicant:

Robert Bosch G. m. b. H.,
Stuttgart W, Breitscheidstr. 4Robert Bosch GMBH.,
Stuttgart W, Breitscheidstr. 4th

DipL-Ing. Gerhard Lindae, Fellbach (Württ.),
ist als Erfinder genannt wordenDipL-Ing. Gerhard Lindae, Fellbach (Württ.),
has been named as the inventor

Da die Anordnung des Abblendleuchtkörpers und seines Schirmes gemäß der Erfindung bereits diese günstige Verteilung des Abblendlichtes gewährleistet, kann auf die bisher zur Lichtverteilung benötigten optischen Linsenelemente, welche stets auch die Bündelung und damit die Reichweite des Fernlichtes beeinträchtigen, nunmehr verzichtet werden. Somit wird durch den Erfindungsgegenstand auch eine schärfere Bündelung und damit eine erheblich gesteigerte Reichweite des Fernlichtes ermöglicht. Die beim Einschalten der Abblendlichtquelle auf der Gegenfahrbahn entstehende Schattenzone schützt die Fahrer entgegenkommender Fahrzeuge vollkommen gegen jegliche Blendwirkung. Die größere Helligkeit des Abblendlichtes außerhalb dieser Zone kommt nicht nur dem Fahrer des mit der Scheinwerferglühlampe gemäß der Erfindung ausgestatteten Fahrzeuges zugute, sondern erleichtert auch auf der Seite des Gegenverkehrs die Orientierung und ergibt damit eine größere Fahrsicherheit beim Begegnen zweier Fahrzeuge.Since the arrangement of the low beam and its screen according to the invention already this Favorable distribution of the low beam ensured, can be based on the previously required for light distribution optical lens elements, which always impair the bundling and thus the range of the high beam, can now be waived. Thus, the subject matter of the invention also makes a sharper one Bundling and thus a considerably increased range of the high beam enables. The one when you turn it on The shadow zone created by the low-beam light source on the opposite lane protects the driver from oncoming traffic Vehicles completely against any glare. The greater brightness of the low beam outside this zone, not only does the driver get the headlight bulb according to the Invention equipped vehicle benefit, but also facilitates on the side of oncoming traffic Orientation and thus results in greater driving safety when two vehicles meet.

In der Zeichnung ist eine Ausfuhrungsform des Gegenstandes der Erfindung dargestellt, und zwar zeigtIn the drawing is an embodiment of the Subject of the invention shown, namely shows

Fig. 1 die Leuchtkörperanordnung undFig. 1 shows the filament arrangement and

Fig. 2 ein Schaubild, welches die Lichtverteilung darstellt.Fig. 2 is a graph showing the light distribution.

An zwei Stromzuführungen 3,4 ist eine bogenförmig gekrümmte Glühwendel 7 derart befestigt, daß sich ihr Schwerpunkt im Brennpunkt eines nicht gezeichneten Scheinwerferspiegels befindet, wenn die Lampe in diesem Spiegel eingesetzt ist. Infolge dieser Anordnung erzeugt diese Lichtquelle Fernlicht mit geringer Streuung, das auf freier Straße benutzbar ist, solange kein Gegenverkehr besteht. Die Fahrtrichtung ist in Fig. 1 durch den Pfeil I angedeutet.An arcuately curved incandescent filament 7 is attached to two power supply lines 3, 4 in such a way that its center of gravity is in the focal point of a headlight mirror, not shown, if the Lamp is used in this mirror. As a result of this arrangement, this light source generates high beam with less Dispersion that can be used on the open road as long as there is no oncoming traffic. The direction of travel is indicated in Fig. 1 by the arrow I.

009 549/191009 549/191

Das Abblendlicht wird von einer vor dem Brennpunkt in Richtung der optischen Achse angeordneten, ebenfalls als Wendel ausgebildeten Lichtquelle 8 ausgestrahlt, deren Enden mit den Stromzuführungen 3 bzw. 5 verbunden sind. Die Stromzuführung 3 dient zugleich auch als Träger eines schmalen Abdeckschirmes 9, welcher sich längs der Abblendlichtquelle erstreckt und dessen der Fernlichtquelle 7 benachbartes Ende gegen die optische Achse 0-0 hin abgebogen ist. ίοThe low beam is arranged in front of the focal point in the direction of the optical axis, light source 8, likewise embodied as a helix, is emitted, the ends of which are connected to the power supply lines 3 and 5 are connected. The power supply 3 also serves as a support for a narrow cover screen 9, which extends along the low beam source and which the high beam source 7 is adjacent The end is bent towards the optical axis 0-0. ίο

Das in Fig. 2 dargestellte Schaubild zeigt die Lichtverteilung, die sich beim Einschalten der Abblendlichtquelle der in Fig. 1 dargestellten Leuchtkörperanordnung auf einem Projektionsschirm ergibt, welcher quer zum Strahlengang eines mit einer Glühlampe gemäß der Erfindung ausgerüsteten Scheinwerfers aufgestellt ist. Die optische Achse 0-0 trifft die Schirmebene im Punkt 0. Die geraden ~L\moxiA-A und B-B sind die durch diesen Punkt gehenden horizontalen bzw. vertikalen Achsen des Schaubildes. Die Kurven α bis k verbinden die Punkte gleicher Beleuchtungsstärke, welche — ausgehend von dem durch die Kurve α umgrenzten hellsten Kernquerschnitt — gegen den äußeren Rand k hin ständig geringer wird. Der in Fig. 1 dargestellte bandförmige Schirm 9 erzeugt innerhalb des Lichtbündelquerschnittes eine sektorförmige Schattenzone; diese Schattenzone erstreckt sich zwischen einer waagerechten Helldunkelgrenze ra, die etwas unterhalb der horizontalen Achse A-A verläuft und einer um etwa 30° gegen diese Achse etwa vom 0-Punkt ausgehenden, schräg nach aufwärts geneigten Grenzlinie n. The diagram shown in Fig. 2 shows the light distribution that results when the low beam source of the luminous element arrangement shown in Fig. 1 is switched on on a projection screen which is set up transversely to the beam path of a headlight equipped with an incandescent lamp according to the invention. The optical axis 0-0 meets the screen plane at point 0. The straight lines ~ L \ moxiA-A and BB are the horizontal and vertical axes of the diagram that go through this point. The curves α to k connect the points of the same illuminance, which - starting from the brightest core cross section delimited by the curve α - becomes steadily smaller towards the outer edge k. The band-shaped screen 9 shown in FIG. 1 generates a sector-shaped shadow zone within the light beam cross-section; This shadow zone extends between a horizontal light-dark boundary ra, which runs slightly below the horizontal axis AA , and a boundary line n which is inclined upwards at an angle of about 30 ° towards this axis from about the 0 point.

Claims (3)

Patentansprüche:Patent claims: 1. Zweifadenglühlampe für Scheinwerfer von Kraftfahrzeugen, von denen die das Abblendlicht liefernde Glühwendel, die parallel zur optischen Achse vor dem Brennpunkt des Reflektors anzuordnen ist, sich außerdem seitlich auf der dem Gegenverkehr zugewandten Seite und etwas oberhalb der optischen Achse befindet und zum Teil gegen den Reflektor hin auf der dem Gegenverkehr abgewandten Seite durch einen im Innern der Lampe vorteilhafterweise an einer der Stromzuführungen für die Glühlampe befestigten Schirm abgedeckt ist, dadurch gekennzeichnet, daß der Abblendschirm die Form eines schmalen, mindestens die Breite des Durchmessers der Abblendglühwendel (8) aufweisenden Bandes (9) hat, welches sich etwa senkrecht zu einer horizontalen Ebene durch die optische Achse im wesentlichen parallel zur Abblendglühwendel (8) erstreckt und sich in Brennpunktnähe gegen die Achse der Abblendglühwendel (8) hin und etwa parallel zum entsprechenden Teil der Reflektorwandung krümmt.1. Two-filament incandescent lamp for headlights of motor vehicles, of which the dipped beam supplying filament, which is to be arranged parallel to the optical axis in front of the focal point of the reflector is, also laterally on the side facing the oncoming traffic and slightly above the optical axis and partly against the reflector on the oncoming traffic remote side by one in the interior of the lamp, advantageously on one of the power supply lines for the incandescent lamp attached screen is covered, characterized in that the anti-glare screen has the shape of a narrow, at least the width of the diameter of the dipped glow coil (8) having the band (9), which approximately perpendicular to a horizontal plane through the optical axis is substantially parallel to the dipped filament (8) and extends in the vicinity of the focal point against the axis of the dipped filament (8) curves towards and approximately parallel to the corresponding part of the reflector wall. 2. Glühlampe nach Anspruch 1, dadurch gekennzeichnet, daß der Schirm (9) in solchem Abstand von der Abblendlichtquelle (8) angeordnet und nur so breit bemessen ist, daß er innerhalb des Abblendlichtbündels eine von einer waagerechten Helldunkelgrenze (m) und von einer um 30° nach aufwärts geneigten Grenzlinie (n) begrenzte sektorartige Schattenzone erzeugt.2. Incandescent lamp according to claim 1, characterized in that the screen (9) is arranged at such a distance from the low beam source (8) and is only dimensioned so wide that it is one of a horizontal light-dark boundary (m) and of one around within the low beam 30 ° after upward sloping border line (s) limited sector-like shadow zone is generated. 3. Glühlampe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß außer der Abblendlichtquelle eine an deren Stelle wahlweise einschaltbare Fernlichtquelle in an sich bekannter Form und Anordnung vorgesehen ist.3. Incandescent lamp according to claim 1 or 2, characterized in that in addition to the low beam source a high beam source that can be optionally switched on in its place, in a form and arrangement known per se is provided. 35 In Betracht gezogene Druckschriften:
Deutsche Patentschrift Nr. 848 389;
deutsche Auslegeschrift Nr. 1 015 926;
österreichische Patentschrift Nr. 195 526;
französische Patentschriften Nr. 958 316, 1 131 455; USA.-Patentschrift Nr. 1 271 278. 35 Publications considered:
German Patent No. 848,389;
German Auslegeschrift No. 1 015 926;
Austrian Patent No. 195 526;
French Patent Nos. 958 316, 1131 455; U.S. Patent No. 1,271,278. Hierzu 1 Blatt Zeichnungen1 sheet of drawings © 009 549/191 6.© 009 549/191 6.
DEB47835A 1958-02-13 1958-02-13 Two-filament light bulb for headlights of motor vehicles Pending DE1084835B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL126154D NL126154C (en) 1958-02-13
DEB47835A DE1084835B (en) 1958-02-13 1958-02-13 Two-filament light bulb for headlights of motor vehicles
CH6930959A CH372104A (en) 1958-02-13 1959-02-09 Electric incandescent lamp used in a headlight of a motor vehicle
US792389A US3083315A (en) 1958-02-13 1959-02-10 Headlamps
GB4627/59A GB898612A (en) 1958-02-13 1959-02-10 Improvements in vehicle headlamp bulbs
FR786343A FR1224989A (en) 1958-02-13 1959-02-11 Incandescent lamp for automobile headlight

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB47835A DE1084835B (en) 1958-02-13 1958-02-13 Two-filament light bulb for headlights of motor vehicles

Publications (1)

Publication Number Publication Date
DE1084835B true DE1084835B (en) 1960-07-07

Family

ID=6968383

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB47835A Pending DE1084835B (en) 1958-02-13 1958-02-13 Two-filament light bulb for headlights of motor vehicles

Country Status (6)

Country Link
US (1) US3083315A (en)
CH (1) CH372104A (en)
DE (1) DE1084835B (en)
FR (1) FR1224989A (en)
GB (1) GB898612A (en)
NL (1) NL126154C (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1271278A (en) * 1917-06-18 1918-07-02 Charles J Mcdonald Light-dimmer.
FR958316A (en) * 1950-03-07
DE848389C (en) * 1949-04-13 1952-09-04 Philips Nv Bundle light with an electric incandescent lamp, in particular for use in vehicles
FR1131455A (en) * 1954-02-13 1957-02-21 Philips Nv Incandescent lamp for automotive lighting
DE1015926B (en) * 1954-03-02 1957-09-19 Philips Nv Electric two-filament light bulb for vehicle lighting
AT195526B (en) * 1956-01-24 1958-02-10 Egyesuelt Izzolampa Light bulb for automobile headlights

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1716048A (en) * 1921-07-29 1929-06-04 Safety Anti Dazzle Bulb Syndic Vehicle lamp
US1793398A (en) * 1928-01-11 1931-02-17 Hamberger John Electric lamp
NL35337C (en) * 1930-07-22
US2006140A (en) * 1932-01-15 1935-06-25 Gen Electric Illumination
US2144438A (en) * 1937-10-06 1939-01-17 Birdseye Electric Company Tubular incandescent electric lamp
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FR1224989A (en) 1960-06-28
US3083315A (en) 1963-03-26
NL126154C (en)
CH372104A (en) 1963-09-30
GB898612A (en) 1962-06-14

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