EP0170326A1 - Electrical incandescent lamp having a reflector screen - Google Patents

Electrical incandescent lamp having a reflector screen Download PDF

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Publication number
EP0170326A1
EP0170326A1 EP85201178A EP85201178A EP0170326A1 EP 0170326 A1 EP0170326 A1 EP 0170326A1 EP 85201178 A EP85201178 A EP 85201178A EP 85201178 A EP85201178 A EP 85201178A EP 0170326 A1 EP0170326 A1 EP 0170326A1
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EP
European Patent Office
Prior art keywords
screen
filament
bulb
tongue
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.)
Granted
Application number
EP85201178A
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German (de)
French (fr)
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EP0170326B1 (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
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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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    • 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 European patent application 0 098 905 (Cibie Projectors, January 25, 1984).
  • 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. If an incandescent lamp of the kind mentioned in the preamble is used in a flat reflector, the reflective screen tor sends a significant amount of light onto a flat part of the reflector so that this light does little to contribute to the passing beam emitted by the headlamp.
  • 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 disadvantage 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 paraboloid 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 reflective 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 the ampoule. Thus, in the case of the use of 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.
  • screen 11 is pre feels a reflective tongue 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 end remote from the sealing 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.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Une lampe à incandescence électrique munie d'un filament longitudinal (6) et d'un écran concave allongé (11) coopérant avec ledit filament présente, conformément à l'invention, une languette réflectrice (16) formée dans l'écran (11) et s'écartant régulièrement d'une partie de base aplatie (13) de l'écran, vis-à-vis du filament (6) sur toute sa longueur, et s'étendant vers l'extrémité (7) du filament éloignée du scellement (2) de l'ampoule (1). Utilisée comme lampe dans un projecteur muni d'un réflecteur paraboloîdal aplati, la lampe fournit un faisceau de croisement plus intense.An electric incandescent lamp provided with a longitudinal filament (6) and an elongated concave screen (11) cooperating with said filament has, in accordance with the invention, a reflective tongue (16) formed in the screen (11) and deviating regularly from a flattened base part (13) of the screen, facing the filament (6) over its entire length, and extending towards the end (7) of the filament remote from the sealing (2) of the bulb (1). Used as a lamp in a projector with a flattened paraboloid reflector, the lamp provides a more intense passing beam.

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, les deux bras étant respectivement reliés à une entrée de courant ;
  • - un écran réflecteur concave allongé disposé dans l'ampoule et s'étendant, le long du filament, par sa face concave vers ce dernier, écran dont l'extrémité située vis-à-vis dudit scellement est courbée d'une façon 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, the two arms being respectively connected to a current input;
  • - an elongated concave reflective screen disposed in the bulb and extending, along the filament, by its concave face towards the latter, screen whose end located opposite said seal is curved in an essentially spherical manner , and whose opposite end has a tongue extending longitudinally in the bulb, screen which is further provided with a flattened base part.

Une telle lampe est connue entre autres de la demande de brevet européen 0 098 905 (Cibie Projecteurs, 25 janvier 1984). 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 European patent application 0 098 905 (Cibie Projectors, January 25, 1984). 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 paraboloidal 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 aplati 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. If an incandescent lamp of the kind mentioned in the preamble is used in a flat reflector, the reflective screen tor sends a significant amount of light onto a flat part of the reflector so that this light does little to contribute to the passing beam emitted by the headlamp.

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 la 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 disadvantage 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 paraboloidal 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 paraboloid 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'étent, 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 reflective 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 the ampoule. Thus, in the case of the use of 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.
  • FIG. 1 is a side view of a lamp fitted with the screen,
  • FIG. 2 represents a detail of FIG. 1 on a larger scale,
  • FIG. 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 screen 11 is pre feels a reflective tongue 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 end remote from the sealing 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. 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, les deux bras étant respectivement reliés à une entrée de courant ; - un écran réflecteur concave allongé disposé dans l'ampoule et s'étendant le long du filament, par sa face concave vers ce dernier, écran dont l'extrémité située vis-à-vis dudit scellement est courbée d'une façon 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,
caractérisée en ce que dans l'écran est présente une languette réflectrice, qui s'éloigne régulièrement de la partie de base aplatie dudit écran et s'étend, vis-à-vis du filament sur toute sa longueur vers l'extrémité du filament éloignée du scellement de l'ampoule.1. 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, the two arms being respectively connected to a current input; - an elongated concave reflective screen disposed in the bulb and extending along the filament, by its concave face towards the latter, a screen whose end located opposite said seal is curved in an essentially spherical manner, and the opposite end of which has a tongue extending longitudinally in the bulb, a screen which is further provided with a flattened base part,
characterized in that in the screen there is a reflective tab, which regularly moves away from the flattened base part of said screen and extends, vis-à-vis the filament over its entire length towards the end of the filament remote sealing the ampoule. 2. Lampe à incandescence électrique selon la revendication 1, caractérisée en ce que la languette présente une surface concave vis-à-vis du filament.2. Electric incandescent lamp according to claim 1, characterized in that the tongue has a concave surface vis-à-vis the filament. 3. Lampe à incandescence électrique selon la revendication 2, caractérisée en ce que la languette est courbée de façon cylindrique autour d'un axe perpendiculaire à l'ampoule tubulaire.3. Electric incandescent lamp according to claim 2, characterized in that the tongue is curved in a cylindrical fashion around an axis perpendicular to the tubular bulb. 4. Lampe à incandescence électrique selon la revendication 2, caractérisée en ce que la languette est courbée de façon sphérique.4. Electric incandescent lamp according to claim 2, characterized in that the tongue is curved spherically. 5. Lampe à incandescence électrique selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que la languette est formée par estampage dans l'écran et courbée vers l'intérieur dans ledit écran tout en masquant la fenêtre ainsi formée du filament.5. Electric incandescent lamp according to one or more of the preceding claims, characterized in that the tongue is formed by stamping in the screen and curved inward in said screen while masking 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
FR8412310A FR2568721B1 (en) 1984-08-03 1984-08-03 ELECTRIC INCANDESCENT LAMP FOR MOTOR VEHICLE
FR8412310 1984-08-03

Publications (2)

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

Family

ID=9306773

Family Applications (1)

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)

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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
EP2994932B1 (en) * 2013-05-07 2016-09-14 Koninklijke Philips N.V. Automotive front lighting lamp with baffle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2250955A1 (en) * 1973-11-14 1975-06-06 British Sealed Beams Ltd
EP0098905A1 (en) * 1982-07-06 1984-01-25 Cibie Projecteurs Halogen incandescent lamps and associated projectors

Family Cites Families (2)

* 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
NL184397C (en) * 1979-06-29 1989-07-03 Philips Nv HALOGEN LIGHT.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2250955A1 (en) * 1973-11-14 1975-06-06 British Sealed Beams Ltd
EP0098905A1 (en) * 1982-07-06 1984-01-25 Cibie Projecteurs Halogen incandescent lamps and associated projectors

Also Published As

Publication number Publication date
EP0170326B1 (en) 1988-09-28
HU191798B (en) 1987-04-28
US4686410A (en) 1987-08-11
JPS6142853A (en) 1986-03-01
HUT38468A (en) 1986-05-28
FR2568721A1 (en) 1986-02-07
DE3565338D1 (en) 1988-11-03
JPH0531269B2 (en) 1993-05-12
FR2568721B1 (en) 1986-12-05

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