EP0170326B1 - Electrical incandescent lamp having a reflector screen - Google Patents

Electrical incandescent lamp having a reflector screen Download PDF

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Publication number
EP0170326B1
EP0170326B1 EP85201178A EP85201178A EP0170326B1 EP 0170326 B1 EP0170326 B1 EP 0170326B1 EP 85201178 A EP85201178 A EP 85201178A EP 85201178 A EP85201178 A EP 85201178A EP 0170326 B1 EP0170326 B1 EP 0170326B1
Authority
EP
European Patent Office
Prior art keywords
screen
filament
tongue
envelope
incandescent lamp
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
Application number
EP85201178A
Other languages
German (de)
French (fr)
Other versions
EP0170326A1 (en
Inventor
Michel Jacrot
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.)
FABRIQUES REUNIES DE LAMPES ELECTRIQUES
Koninklijke Philips NV
Original Assignee
FABRIQUES REUNIES DE LAMPES ELECTRIQUES
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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
Application filed by FABRIQUES REUNIES DE LAMPES ELECTRIQUES, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical FABRIQUES REUNIES DE LAMPES ELECTRIQUES
Publication of EP0170326A1 publication Critical patent/EP0170326A1/en
Application granted granted Critical
Publication of EP0170326B1 publication Critical patent/EP0170326B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting
    • H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Definitions

  • Such a lamp is known inter alia from application EP-A-0 098 905.
  • the lamp can be used in vehicles as a projector lamp, said filament providing a passing beam.
  • a second filament not cooperating with the concave screen is arranged in the bulb, it is possible to obtain a driving beam.
  • Such a lamp having two longitudinal filaments, as well as a gas filling containing halogen, is called an H4 lamp.
  • Vehicles are generally equipped with projectors fitted with a flattened paraboloid reflector.
  • the reflective screen sends a significant amount of light onto a flattened part of the reflector so that this light hardly contributes to the beam of crossing emitted by the projector.
  • the invention described in said European patent application uses a reflective screen, the end of which is distant from the seal and is spherically curved. Thus, a greater quantity of the light supplied by the filament arrives in the beam emitted by the projector.
  • a screen has the drawback of not being provided with a longitudinal tongue.
  • Another drawback lies in the need to use a screen of a shape other than in use.
  • the invention aims to provide a lamp of the type described in the preamble making it possible, using a conventional screen, to produce a more intense passing beam from a flattened parabolic reflector than with the lamp described in the preamble.
  • this object is achieved due to the fact that in the screen there is a reflective tab which regularly deviates from the flattened base part of said screen and extends, vis- towards the filament over its entire length, towards the end of the latter away from the sealing of the bulb.
  • the reflecting tab can be a separate part of the screen and be fixed for example to its base part by one or more welds, or it can constitute an integral part of the screen and be formed by stamping and be bent then inward. Because in the latter case, the tongue is located closer to the filament than the opening of the screen from which the tongue is stamped and curved, this tongue can easily mask this opening with respect to the light emitted by the filament . Thanks to its positioning, the reflective tongue sends at least part of the light which, in the absence of said tongue, had to leave the bulb in a practically radial way, more in the longitudinal direction towards the sealing of the bulb . Thus, in the case of using a flattened paraboloid reflector, this light arrives for the most part on the curved surface of the reflector and contributes to the beam formed by this surface.
  • the shape of the reflective tab can be chosen from several shapes. It has proven advantageous to choose a concave shape, for example a cylindrical curved tongue, the cylinder axis being perpendicular to the axis of the tubular bulb.
  • a concave tongue is a spherically curved tongue, the concave face being directed towards the filament.
  • the object of the invention is achieved while maintaining the tab of the end of the screen opposite to the bulb seal and while maintaining the contours of a conventional screen. It is for this reason that, if necessary, the screen tab can be used to fix one of the arms of the filament. Thus, the filament reaches a position suitably fixed relative to the screen. If the screen is supported by a current input, which is most often the case, this arm is thus connected to this current input.
  • the tongue of the screen can be used to support the interior of the lamp against the wall of the bulb.
  • the tongue of the screen has for this purpose a lateral projection resting against the wall of the bulb. Particularly in the case where the current inputs have a leaf-shaped part in the sealing of the bulb, the tongue of the screen resting against the wall of the bulb prevents the interior parts of the bulb from occupying a position tilted during the realization of this sealing.
  • the lamp according to FIG. 1 has a tubular bulb 1 made of gas-tight glass, for example made of quartz glass, a first end of which has a seal 2.
  • Current inputs 3, 4, just like a third current input 5, pass through the seal and enter the bulb 1.
  • a helical filament 6 is provided in the bulb 1 and each of its ends 7, 8 has an arm 9, 10 respectively connected to a current input 4 , 3.
  • the end 7 is the far end of the seal 2 of the bulb.
  • An elongated concave reflective screen 11 extends in the bulb 1 along the filament 6, its concave face being directed towards the latter.
  • the screen is curved in an essentially spherical manner at its end situated opposite the seal 2, present at the opposite end, a tongue 12 which extends longitudinally in the bulb, screen provided with a flattened base part 13.
  • the screen 11 is supported by the current input 4.
  • To its tongue 12 is fixed the arm 9, so that the latter is connected to the current input 4.
  • the filament 6 emits a passing beam using the screen 11, a flat reflector paraboloid flattened projector, shown schematically, in which is arranged the bulb and a lens not shown of this projector.
  • the lamp is provided with a second longitudinal filament 14, which is connected to the current inputs 3, 5 and which provides, in concert with a reflector and a projector lens, a driving beam, during operation.
  • On seal 2, the lamp is fitted with a base 15.
  • FIG. 2 is seen the arrangement taken in the lamp according to the invention.
  • a reflective tab 16 which regularly deviates from the flattened base part and extends, with respect to the filament over its entire length, towards the end 7 of the latter, which is the far end of the seal 2 of the bulb 1 ( Figure 1).
  • the tab shown 16 has a concave cylindrical surface, which is located opposite the filament 6.
  • the tab 16 has a sealing tab 17 on which is welded with the flattened base part 13, so that the tab 16 is fixed to said base part.
  • the tongue 12 has a rib 18 on which a weld is made with the arm 9.
  • the filament 6 is that of FIG. 2.
  • the tongue 26 is an integral part of the screen 21 and is obtained by stamping in the material of screen 21 and is curved inward. The tongue is curved spherically from the concave side towards the filament 6.
  • 29 designates the window formed by stamping the tongue 26.
  • the window 29 is masked from the filament by the tongue 26 curved towards the filament 6.

Description

L'invention concerne une lampe à incandescence électrique munie

  • - d'une ampoule en verre tubulaire étanche au gaz, dont une première extrémité présente un scellement ;
  • - des entrées de courant traversant le scellement pour entrer dans l'ampoule ;
  • - un filament hélicoïdal, qui est disposé longitudinalement dans l'ampoule et dont chaque extrémité présente un bras, chacun des deux bras étant relié à une entrée de courant respective ;
  • - un écran réflecteur concave allongé disposé dans l'ampoule, s'étendant le long du filament avec sa face concave dirigée vers ce dernier, écran dont l'extrémité située vis-à-vis dudit scellement est essentiellement sphérique, et dont l'extrémité opposée présente une languette s'étendant longitudinalement dans l'ampoule, écran qui est muni en outre d'une partie de base aplatie.
The invention relates to an electric incandescent lamp provided
  • - a gas-tight tubular glass bulb, a first end of which has a seal;
  • - current inputs passing through the seal to enter the bulb;
  • - a helical filament, which is arranged longitudinally in the bulb and each end of which has an arm, each of the two arms being connected to a respective current input;
  • - an elongated concave reflective screen disposed in the bulb, extending along the filament with its concave face directed towards the latter, screen whose end located opposite said seal is essentially spherical, and whose end opposite has a tongue extending longitudinally in the bulb, screen which is further provided with a flattened base portion.

Une telle lampe est connue entre autres de la demande EP-A-0 098 905. La lampe peut être utilisée dans des véhicules comme lampe pour projecteur, ledit filament fournissant un faisceau de croisement. Dans le cas où un deuxième filament ne coopérant pas avec l'écran concave est disposé dans l'ampoule, il est possible d'obtenir un faisceau de route. Une telle lampe présentant deux filaments longitudinaux, ainsi qu'un remplissage gazeux contenant de l'halogène, est appelée lampe H4.Such a lamp is known inter alia from application EP-A-0 098 905. The lamp can be used in vehicles as a projector lamp, said filament providing a passing beam. In the case where a second filament not cooperating with the concave screen is arranged in the bulb, it is possible to obtain a driving beam. Such a lamp having two longitudinal filaments, as well as a gas filling containing halogen, is called an H4 lamp.

Les véhicules sont en général équipés de projecteurs munis d'un réflecteur paraboloïdal aplati. Dans le cas d'utilisation d'une lampe à incandescence du genre mentionné dans le préambule dans un réflecteur aplati, l'écran réflecteur envoie une quantité notable de lumière sur une partie aplatie du réflecteur de façon que cette lumière ne contribue guère au faisceau de croisement émis par le projecteur.Vehicles are generally equipped with projectors fitted with a flattened paraboloid reflector. When using an incandescent lamp of the kind mentioned in the preamble in a flattened reflector, the reflective screen sends a significant amount of light onto a flattened part of the reflector so that this light hardly contributes to the beam of crossing emitted by the projector.

L'invention décrite dans ladite demande de brevet européen utilise un écran réflecteur, dont l'extrémité éloignée du scellement est courbée de façon sphérique. Ainsi, une plus grande quantité de la lumière fournie par le filament parvient dans le faisceau émis par le projecteur. Toutefois, un tel écran présente l'inconvénient de ne pas être muni d'une languette longitudinale. Un autre inconvénient réside dans le nécessité d'utiliser un écran d'une autre forme qu'en usage.The invention described in said European patent application uses a reflective screen, the end of which is distant from the seal and is spherically curved. Thus, a greater quantity of the light supplied by the filament arrives in the beam emitted by the projector. However, such a screen has the drawback of not being provided with a longitudinal tongue. Another drawback lies in the need to use a screen of a shape other than in use.

L'invention vise à fournir une lampe du genre décrit dans le préambule permettant de réaliser, à l'aide d'un écran conventionnel, un faisceau de croisement plus intense à partir d'un réflecteur paraboloïdal aplati qu'avec la lampe décrite dans le préambule.The invention aims to provide a lamp of the type described in the preamble making it possible, using a conventional screen, to produce a more intense passing beam from a flattened parabolic reflector than with the lamp described in the preamble.

Conformément à l'invention, dans la lampe décrite dans le préambule, ce but est atteint du fait que dans l'écran est présente une languette réflectrice qui s'écarte régulièrement de la partie de base aplatie dudit écran et s'étend, vis-à-vis du filament sur toute sa longueur, vers l'extrémité de ce dernier éloignée du scellement de l'ampoule.According to the invention, in the lamp described in the preamble, this object is achieved due to the fact that in the screen there is a reflective tab which regularly deviates from the flattened base part of said screen and extends, vis- towards the filament over its entire length, towards the end of the latter away from the sealing of the bulb.

La languette réflectrice peut être une pièce séparée de l'écran et être fixée par exemple à sa partie de base par une ou plusieurs soudures, ou bien, elle peut constituer une partie intégrale de l'écran et en être formée par estampage et être courbée ensuite vers l'intérieur. Du fait que dans ce dernier cas, la languette se situe plus près du filament que l'ouverture de l'écran à partir duquel est estampée et courbée la languette, cette languette peut facilement masquer cette ouverture par rapport à la lumière émise par le filament. Grâce à son positionnement, la languette réflectrice envoie au moins une partie de la lumière qui, en l'absence de ladite languette, devait quitter l'ampoule d'une façon pratiquement radiale, plus dans la direction longitudinale vers le scellement de l'ampoule. Ainsi, dans le cas d'utilisation d'un réflecteur paraboloïdal aplati, cette lumière parvient en majeure partie sur la surface courbée du réflecteur et contribue au faisceau formé par cette surface.The reflecting tab can be a separate part of the screen and be fixed for example to its base part by one or more welds, or it can constitute an integral part of the screen and be formed by stamping and be bent then inward. Because in the latter case, the tongue is located closer to the filament than the opening of the screen from which the tongue is stamped and curved, this tongue can easily mask this opening with respect to the light emitted by the filament . Thanks to its positioning, the reflective tongue sends at least part of the light which, in the absence of said tongue, had to leave the bulb in a practically radial way, more in the longitudinal direction towards the sealing of the bulb . Thus, in the case of using a flattened paraboloid reflector, this light arrives for the most part on the curved surface of the reflector and contributes to the beam formed by this surface.

La forme de la languette réflectrice peut être choisie entre plusieurs formes. Il s'est avéré avantageux de choisir une forme concave, par exemple une languette courbée de façon cylindrique, l'axe de cylindre étant perpendiculaire à l'axe de l'ampoule tubulaire. Un autre exemple d'une languette concave est une languette courbée de façon sphérique, la face concave étant dirigée vers le filament.The shape of the reflective tab can be chosen from several shapes. It has proven advantageous to choose a concave shape, for example a cylindrical curved tongue, the cylinder axis being perpendicular to the axis of the tubular bulb. Another example of a concave tongue is a spherically curved tongue, the concave face being directed towards the filament.

Le but de l'invention est atteint tout en maintenant la languette de l'extrémité de l'écran opposée au scellement d'ampoule et tout en maintenant les contours d'un écran conventionnel. C'est pour cette raison, qu'au besoin, la languette de l'écran peut être utilisée pour y fixer l'un des bras du filament. Ainsi, le filament parvient dans une position convenablement fixée par rapport à l'écran. Si l'écran est supporté par une entrée de courant, ce qui est le plus souvent le cas, ce bras est ainsi relié à cette entrée de courant. Ainsi, au besoin, la languette de l'écran peut être utilisée pour supporter l'intérieur de la lampe contre la paroi de l'ampoule. Dans de nombreux cas, la languette de l'écran présente à cet effet, une saillie latérale reposant contre la paroi de l'ampoule. Notamment dans le cas où les entrées de courant présentent une partie en forme de feuille dans le scellement de l'ampoule, la languette de l'écran reposant contre la paroi de l'ampoule empêche que les parties intérieures de l'ampoule occupent une position inclinée pendant la réalisation de ce scellement.The object of the invention is achieved while maintaining the tab of the end of the screen opposite to the bulb seal and while maintaining the contours of a conventional screen. It is for this reason that, if necessary, the screen tab can be used to fix one of the arms of the filament. Thus, the filament reaches a position suitably fixed relative to the screen. If the screen is supported by a current input, which is most often the case, this arm is thus connected to this current input. Thus, if necessary, the tongue of the screen can be used to support the interior of the lamp against the wall of the bulb. In many cases, the tongue of the screen has for this purpose a lateral projection resting against the wall of the bulb. Particularly in the case where the current inputs have a leaf-shaped part in the sealing of the bulb, the tongue of the screen resting against the wall of the bulb prevents the interior parts of the bulb from occupying a position tilted during the realization of this sealing.

La description ci-après, en se référant aux dessins annexés, le tout donné à titre d'exemple non limitatif, fera bien comprendre comment l'invention peut être réalisée.

  • La figure 1 est une vue latérale d'une lampe munie de l'écran.
  • La figure 2 représente un détail de la figure 1 à plus grande échelle.
  • La figure 3 est une vue latérale d'une autre forme de réalisation d'un écran.
  • La figure 4 est une vue en plan de l'écran de la figure 3.
The description below, with reference to the accompanying drawings, all given by way of non-limiting example, will make it clear how the invention can be implemented.
  • Figure 1 is a side view of a lamp with the screen.
  • Figure 2 shows a detail of Figure 1 on a larger scale.
  • Figure 3 is a side view of another embodiment of a screen.
  • FIG. 4 is a plan view of the screen of FIG. 3.

La lampe selon la figure 1 présente une ampoule 1 tubulaire en verre étanche au gaz, par exemple en verre de quartz, dont une première extrémité présente un scellement 2. Des entrées de courant 3, 4, tout comme une troisième entrée de courant 5, traversent le scellement et entrent dans l'ampoule 1. D'une façon longitudinale, un filament hélicoïdal 6 est prévu dans l'ampoule 1 et chacune de ses extrémités 7, 8 présente un bras 9, 10 respectivement relié à une entrée de courant 4, 3. L'extrémité 7 est l'extrémité éloignée du scellement 2 de l'ampoule. Un écran réflecteur concave allongé 11 s'étend dans l'ampoule 1 le long du filament 6, sa face concave étant dirigée vers ce dernier. L'écran est courbé d'une façon essentiellement sphérique à son extrémité située vis-à-vis du scellement 2, présente à l'extrémité opposée, une languette 12 qui s'étend de façon longitudinale dans l'ampoule, écran muni d'une partie de base aplatie 13. L'écran 11 est supporté par l'entrée de courant 4. A sa languette 12 est fixé le bras 9, de sorte que ce dernier est relié à l'entrée de courant 4. Lors du fonctionnement, le filament 6 émet un faisceau de croisement à l'aide de l'écran 11, d'un réflecteur 19 aplati paraboloïdal de projecteur, représenté schématiquement, dans lequel est disposée l'ampoule et une lentille non représentée de ce projecteur. La lampe est munie d'un deuxième filament longitudinal 14, qui est relié aux entrées de courant 3, 5 et qui fournit, de concert avec un réflecteur et une lentille d'un projecteur, un faisceau de route, lors du fonctionnement. Sur le scellement 2, la lampe est équipée d'un culot 15.The lamp according to FIG. 1 has a tubular bulb 1 made of gas-tight glass, for example made of quartz glass, a first end of which has a seal 2. Current inputs 3, 4, just like a third current input 5, pass through the seal and enter the bulb 1. In a longitudinal manner, a helical filament 6 is provided in the bulb 1 and each of its ends 7, 8 has an arm 9, 10 respectively connected to a current input 4 , 3. The end 7 is the far end of the seal 2 of the bulb. An elongated concave reflective screen 11 extends in the bulb 1 along the filament 6, its concave face being directed towards the latter. The screen is curved in an essentially spherical manner at its end situated opposite the seal 2, present at the opposite end, a tongue 12 which extends longitudinally in the bulb, screen provided with a flattened base part 13. The screen 11 is supported by the current input 4. To its tongue 12 is fixed the arm 9, so that the latter is connected to the current input 4. During operation, the filament 6 emits a passing beam using the screen 11, a flat reflector paraboloid flattened projector, shown schematically, in which is arranged the bulb and a lens not shown of this projector. The lamp is provided with a second longitudinal filament 14, which is connected to the current inputs 3, 5 and which provides, in concert with a reflector and a projector lens, a driving beam, during operation. On seal 2, the lamp is fitted with a base 15.

Sur la figure 2 se perçoit la disposition prise dans la lampe conforme à l'invention. Dans l'écran 11 est présente une languette réflectrice 16, qui s'écarte régulièrement de la partie de base aplatie et s'étend, vis-à-vis du filament sur toute sa longueur, vers l'extrémité 7 de ce dernier, qui est l'extrémité éloignée du scellement 2 de l'ampoule 1 (figure 1). La languette représentée 16 présente une surface cylindrique concave, qui se situe vis-à-vis du filament 6. La languette 16 présente une patte de scellement 17 sur laquelle est réalisée la soudure avec la partie de base aplatie 13, de sorte que la languette 16 est fixée à ladite partie de base. La languette 12 présente une nervure 18 sur laquelle est réalisée une soudure avec le bras 9.In Figure 2 is seen the arrangement taken in the lamp according to the invention. In the screen 11 there is a reflective tab 16, which regularly deviates from the flattened base part and extends, with respect to the filament over its entire length, towards the end 7 of the latter, which is the far end of the seal 2 of the bulb 1 (Figure 1). The tab shown 16 has a concave cylindrical surface, which is located opposite the filament 6. The tab 16 has a sealing tab 17 on which is welded with the flattened base part 13, so that the tab 16 is fixed to said base part. The tongue 12 has a rib 18 on which a weld is made with the arm 9.

Sur la figure 3 les parties de l'écran 21 correspondant aux parties de la figure 2 sont munies d'un chiffre de référence supérieur de 10. Le filament 6 est celui de la figure 2. La languette 26 est une partie intégrale de l'écran 21 et est obtenue par estampage dans le matériau de l'écran 21 et est courbée vers l'intérieur. La languette est courbée de façon sphérique du côté concave vers le filament 6.In FIG. 3, the parts of the screen 21 corresponding to the parts of FIG. 2 are provided with a higher reference number of 10. The filament 6 is that of FIG. 2. The tongue 26 is an integral part of the screen 21 and is obtained by stamping in the material of screen 21 and is curved inward. The tongue is curved spherically from the concave side towards the filament 6.

Sur la figure 4, 29 désigne la fenêtre formée par estampage de la languette 26. La fenêtre 29 est masquée du filament par la languette 26 courbée vers le filament 6.In FIG. 4, 29 designates the window formed by stamping the tongue 26. The window 29 is masked from the filament by the tongue 26 curved towards the filament 6.

Claims (5)

1. An electrical incandescent lamp provided with
- a tubular glass envelope (1) sealed in a gas- tight manner, of which a first end has a seal (2) ;
- current inputs (3, 4) traversing the seal to enter the envelope ;
- a helical filament (6), which is arranged longitudinally in the envelope and of which each end (7, 8) has a leg (9, 10), each of the two legs being connected to a current input (4, 3 respectively) ;
- a concave elongate reflector screen (11) arranged in the envelope and extending along the filament with its concave surface directed towards the latter, the end of the screen situated opposite to the said seal being substantially spherical and the other end of said screen having a tongue (12, 22) extending longitudinally in the envelope, which screen is moreover provided with a flattened base part (13, 23), characterized in that the screen a reflecting tongue (16, 26) is present, which regularly moves away from the flattened base part of the said screen and extends opposite to the filament throughout its length to the end of the filament remote from the seal of the envelope.
2. An electrical incandescent lamp as claimed in Claim 1, characterized in that the reflecting tongue has a concave surface turned towards the filament.
3. An electrical incandescent lamp as claimed in Claim 2, characterized in that the reflecting tongue is curved cylindrically around an axis perpendicular to the tubular envelope.
4. An electrical incandescent lamp as claimed in Claim 2, characterized in that the reflecting tongue is curved spherically.
5. An electrical incandescent lamp as claimed in one or more of the preceding Claims, characterized in that the reflecting tongue is formed by stamping in the screen and is curved inwards in the said screen whilst screening the window thus formed from the filament.
EP85201178A 1984-08-03 1985-07-12 Electrical incandescent lamp having a reflector screen Expired EP0170326B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8412310 1984-08-03
FR8412310A FR2568721B1 (en) 1984-08-03 1984-08-03 ELECTRIC INCANDESCENT LAMP FOR MOTOR VEHICLE

Publications (2)

Publication Number Publication Date
EP0170326A1 EP0170326A1 (en) 1986-02-05
EP0170326B1 true EP0170326B1 (en) 1988-09-28

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Application Number Title Priority Date Filing Date
EP85201178A Expired EP0170326B1 (en) 1984-08-03 1985-07-12 Electrical incandescent lamp having a reflector screen

Country Status (6)

Country Link
US (1) US4686410A (en)
EP (1) EP0170326B1 (en)
JP (1) JPS6142853A (en)
DE (1) DE3565338D1 (en)
FR (1) FR2568721B1 (en)
HU (1) HU191798B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4057090B2 (en) * 1996-06-06 2008-03-05 本田技研工業株式会社 Light bulb for vehicle
DE19946297A1 (en) * 1999-09-28 2001-04-12 Philips Corp Intellectual Pty Light bulb
DE10219729A1 (en) * 2002-05-02 2003-11-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Light bulb for automotive headlights
US9613793B2 (en) * 2013-05-07 2017-04-04 Koninklijke Philips N.V. Automotive front lighting lamp with baffle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1901179A1 (en) * 1969-01-10 1970-08-06 Patra Patent Treuhand Two-filament halogen light bulb for motor vehicle headlights
GB1477138A (en) * 1973-11-14 1977-06-22 British Sealed Beams Ltd Filament shields
NL184397C (en) * 1979-06-29 1989-07-03 Philips Nv HALOGEN LIGHT.
DE3277341D1 (en) * 1982-07-06 1987-10-22 Cibie Projecteurs Halogen incandescent lamps and associated projectors

Also Published As

Publication number Publication date
US4686410A (en) 1987-08-11
FR2568721A1 (en) 1986-02-07
JPH0531269B2 (en) 1993-05-12
HUT38468A (en) 1986-05-28
HU191798B (en) 1987-04-28
FR2568721B1 (en) 1986-12-05
DE3565338D1 (en) 1988-11-03
JPS6142853A (en) 1986-03-01
EP0170326A1 (en) 1986-02-05

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