EP1308988B1 - System for hooking a filament to an inlead - Google Patents

System for hooking a filament to an inlead Download PDF

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Publication number
EP1308988B1
EP1308988B1 EP02079268.5A EP02079268A EP1308988B1 EP 1308988 B1 EP1308988 B1 EP 1308988B1 EP 02079268 A EP02079268 A EP 02079268A EP 1308988 B1 EP1308988 B1 EP 1308988B1
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EP
European Patent Office
Prior art keywords
spacer
filament
hook
revolution
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 - Lifetime
Application number
EP02079268.5A
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German (de)
French (fr)
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EP1308988A1 (en
Inventor
Jean-Paul Société Civile S.P.I.D. Charlier
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Signify Holding BV
Original Assignee
Koninklijke Philips NV
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Publication of EP1308988A1 publication Critical patent/EP1308988A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/16—Electric connection thereto
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape

Definitions

  • Such a lamp finds application, for example, in a stage lighting system.
  • Such a lamp is marketed by the applicant under the reference 6995Z.
  • the filament is composed of several sections arranged in two planes.
  • Two metal rods electrically connected to two of the filament sections and an external electrical circuit allow power supply of the lamp.
  • These two metal rods have at one end a hook oriented around an axis of revolution and are electrically connected to the two sections by two spacers that are inserted into the hooks of the metal rods. Each spacer is thus in contact with the hook of a metal supply rod at an attachment point depending on a curvature of the spacer.
  • Such a spacer is obtained by momentary interruption of a spiraling to obtain the windings of the filament during manufacture of the filament.
  • This interruption of the spiraling is a delicate operation which leads to a curvature of the random spacer, that is to say that the point of attachment can be located to the left or right of the axis of revolution of the hook of the metal rod.
  • the Applicant has found that during an assembly operation of the filament and the metal rods of power supply, an insertion of the spacer in the hook of a metal rod is particularly difficult when the point of attachment is located on one side of the axis of revolution of the hook, and easier when the point of attachment is on the other side, this side depending on an orientation of the hook.
  • the two metal supply rods are symmetrical. Therefore, when the point of attachment of a spacer is located on one side of the axis of revolution of the hook to which it is connected and that the point of attachment of the other spacer is located on the other side of the axis of revolution of the hook to which it is connected, the assembly of the filament in the lamp is difficult.
  • An incandescent electric lamp as defined in the opening paragraph is also known from the patent document EP0358061 .
  • This document describes in particular a lamp with a power supply rod and a filament.
  • the rod is attached to the filament by threading the rod into the space formed by the windings of a portion of the filament.
  • An object of the invention is to facilitate the assembly of a filament in an incandescent lamp.
  • the invention aims to provide a lamp having another, and preferably an improved bond between the rod and the filament.
  • an incandescent electric lamp as defined in the opening paragraph is characterized in that the spacer comprises at least two windings stretched in a direction parallel to the axis of revolution of the section, and that the rod metal includes a hook to which the spacer is connected.
  • the windings of the spacer have between them a spacing greater than a spacing of the windings of the section or the secondary part.
  • the spacing between two windings of the section may be 0.2 millimeters and the spacing between two windings of the spacer of 2 millimeters.
  • the spacer comprising at least two windings has at least two possible attachment points on the metal power supply rod. At least one of these attachment points is located on one side of the axis of revolution of the hook to which the spacer is connected, such that the insertion of the spacer into the hook is easy. Thus, the assembly of the filament in the lamp is facilitated.
  • the invention also facilitates the assembly of a filament in a lamp of the type marketed by the applicant under the reference 6995Z and described in the state of the prior art. Indeed, if only one of the two spacers comprises at least two windings, a placement step allows to place the other spacer, during the assembly operation of the lamp, so that its point of attachment is on one side of the axis of revolution of the hook to which it is connected, such that the insertion of the spacer into the hook is easy.
  • the spacer comprising at least two windings will then necessarily have at least one attachment point located on the side of the axis of revolution of the hook to which it is connected, such that the insertion of the spacer into the hook is easy. Therefore, the assembly of the filament in the lamp is facilitated.
  • the two spacers comprise at least two windings, they necessarily each have at least one attachment point located on the side of the axis of revolution of the hook to which it is connected, such that the insertion of the spacer into the hook is easy . Therefore, the assembly of the filament in the lamp is, in such a case, facilitated and does not require the necessary placement step when a single spacer comprises at least two windings. Such reasoning is valid for both symmetrical and asymmetric feed rods.
  • FIGS. 1a and 1b illustrate a lamp of the prior art. A description of such a lamp makes it possible to understand a problem solved by the invention.
  • Such a lamp comprises a first filament section 100, a second filament section 101, a first secondary portion 102, a second secondary portion 103, a first spacer 104, a second spacer 105, a first metal supply rod 106 comprising a first hook 106a, a second metal supply rod 107 comprising a second hook 107a, bridges 120 and 121 connected by metal bars 122 and 123, supports 124 and filament loops 125.
  • the first section 100 has a first axis of revolution 110
  • the second section 101 has a second axis of revolution 111.
  • the axes of revolution of the hooks 106a and 107a are substantially merged with the first axis of revolution 110 and the second axis of revolution 111.
  • the filament comprises four sections situated in front of a plane formed by the supports 124.
  • the first section 100 is one of these four sections.
  • the filament includes also four sections located behind a plane formed by the supports 124.
  • the second section 101 is one of these four sections.
  • a tungsten wire is coiled to obtain the first secondary portion 102.
  • the spiral is then interrupted to obtain the first spacer 104, then resumed to obtain a long spiral portion, then again interrupted to obtain the second spacer 105 and finally taken to obtain the second secondary portion 103.
  • the long spiral portion is then folded into eight sections separated by the loops 125, and the filament thus obtained undergoes a heat treatment for stabilizing such a configuration in sections.
  • To electrically connect the first section 100 and the first metal rod 106 one could simply insert one of the windings of the first section 100 in the first hook 106a. But the heat treatment tends to weaken the filament, so that such an operation could break the filament. This is why the first spacer 104 is necessary. It is the same for the second spacer 105.
  • first and second struts 104 and 105 are made such that they have a random curvature.
  • this curvature is to the left relative to the axis of revolution of the hook to which the spacer is connected, as is the case for the first spacer 104, the insertion of the first spacer 104 into the first hook 106a is easy. Indeed, it is sufficient to place the first spacer 104 and the first secondary portion 102 to the right of the first hook 106a, to shift the first spacer 104 forwards, then to the left and finally to the rear so that it inserts into the first hook 106a.
  • the first secondary portion 102 does not strike the first metal rod 106.
  • the curvature of a spacer is to the right with respect to the axis of revolution of the hook to which the spacer is connected, as this is the case for the second spacer 105, the insertion of the second spacer 105 in the second hook 107a is difficult.
  • the second secondary part 103 strikes the second metal rod 107.
  • the Figures 2a and 2b illustrate a lamp according to a first embodiment of the invention.
  • a lamp comprises elements identical to those described in the description of the Figures 1a and 1b .
  • one of the two spacers comprises at least two windings stretched in a direction parallel to the axis of revolution of the section to which it is connected.
  • the second spacer 105 comprises two windings stretched along the second axis of revolution 111.
  • Such stretching can be obtained by applying a traction force directed along the second axis of revolution 111 to the long spiral part obtained by spiraling the tungsten wire. This force is applied before the heat treatment so as to obtain the second spacer 105 composed of two filament windings, one on the left, the other on the right of the second axis of revolution 111. It can be applied before or after folding the long spiral part.
  • Such stretching can also be obtained by modifying the spiraling at the level of the second spacer 105. Indeed, during the spiraling, it is possible to adjust a spacing between two successive windings of the filament. It is therefore possible to define a larger gap for the two windings constituting the second spacer 105.
  • the insertion of the filament into the lamp is carried out as follows.
  • a placement step first allows to insert the first spacer 104 in the hook for which insertion is easy.
  • the point of attachment of the spacer 104 lying to the left of the axis of revolution of the first hook 106a and to the right of the axis of revolution of the second hook 107a, the first spacer 104 is inserted into the first hook 106a since this insertion is easy, as explained in the description of the Figures 1a and 1b .
  • the second spacer 105 now necessarily having a point of attachment to the left of the axis of revolution of the second hook 107a, its insertion into the second hook 107a is also easy.
  • the Figures 3a and 3b illustrate a lamp according to a second embodiment of the invention.
  • a lamp comprises elements identical to those described in the description of the Figures 1a and 1b .
  • the two spacers comprise at least two windings stretched in a direction parallel to the axis of revolution of the section to which it is connected. Such stretching is achieved as described in the description of Figures 2a and 2b .
  • the two spacers 104 and 105 each comprise two windings stretched along the axes of revolution 110 and 111.
  • Each of the spacers 104 and 105 comprises a point of attachment located on one side of the axis of revolution of the hook to which it is connected. , such that the insertion of the spacer into the hook is easy.
  • the insertion of the filament into the lamp is easy, and the necessary placement step in the lamp illustrated on the Figures 2a and 2b is useless.
  • the filament used is a tungsten filament obtained by spiraling a tungsten wire.
  • other materials can be used to manufacture such a filament, since these materials can emit light when traversed by an electric current.
  • the filament shown has several sections of substantially equivalent lengths, arranged in two planes.
  • filaments having different configurations for example filaments comprising a number of different sections, for example a single section, or lengths of sections differing from one section to another.
  • the Figures 1a to 3c illustrate a lamp having two metal feed rods including a hook.
  • the invention also applies to a lamp having a different number of metal feed rods including a hook, including a lamp comprising a filament whose one end is welded to a metal rod and another end is attached to another rod metallic feed through a fastening system as described in the invention.

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  • Resistance Heating (AREA)
  • Discharge Lamp (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

DOMAINE TECHNIQUETECHNICAL AREA

L'invention concerne une lampe électrique incandescente comprenant au moins :

  • un filament comprenant au moins un tronçon comprenant des enroulements disposés en spirale autour d'un axe de révolution, et une partie secondaire reliée au tronçon grâce à une entretoise ; et
  • une tige métallique d'alimentation de courant, la partie secondaire étant attachée à la tige métallique grâce à l'entretoise.
The invention relates to an incandescent electric lamp comprising at least:
  • a filament comprising at least one section comprising windings arranged in a spiral around an axis of revolution, and a secondary part connected to the section by means of a spacer; and
  • a metal current supply rod, the secondary part being attached to the metal rod through the spacer.

Une telle lampe trouve son application, par exemple, dans un système d'éclairage de scène.Such a lamp finds application, for example, in a stage lighting system.

ETAT DE LA TECHNIQUE ANTERIEURESTATE OF THE PRIOR ART

Une telle lampe est commercialisée par la demanderesse sous la référence 6995Z. Dans une telle lampe, le filament est composé de plusieurs tronçons disposés dans deux plans. Deux tiges métalliques reliées électriquement à deux des tronçons de filament ainsi qu'à un circuit électrique externe permettent une alimentation en courant de la lampe. Ces deux tiges métalliques, possèdent à une extrémité un crochet orienté autour d'un axe de révolution et sont reliées électriquement aux deux tronçons grâce à deux entretoises qui viennent s'insérer dans les crochets des tiges métalliques. Chaque entretoise est ainsi en contact avec le crochet d'une tige métallique d'alimentation en un point d'attache dépendant d'une courbure de l'entretoise.Such a lamp is marketed by the applicant under the reference 6995Z. In such a lamp, the filament is composed of several sections arranged in two planes. Two metal rods electrically connected to two of the filament sections and an external electrical circuit allow power supply of the lamp. These two metal rods, have at one end a hook oriented around an axis of revolution and are electrically connected to the two sections by two spacers that are inserted into the hooks of the metal rods. Each spacer is thus in contact with the hook of a metal supply rod at an attachment point depending on a curvature of the spacer.

Une telle entretoise est obtenue par interruption momentanée d'un spiralage permettant d'obtenir les enroulements du filament, lors d'une fabrication du filament. Cette interruption du spiralage est une opération délicate qui conduit à une courbure de l'entretoise aléatoire, c'est à dire que le point d'attache peut aussi bien se situer à gauche qu'à droite de l'axe de révolution du crochet de la tige métallique. Or, la demanderesse a constaté que, lors d'une opération d'assemblage du filament et des tiges métalliques d'alimentation en courant, une insertion de l'entretoise dans le crochet d'une tige métallique est particulièrement difficile lorsque le point d'attache se situe d'un certain côté de l'axe de révolution du crochet, et plus aisée lorsque le point d'attache se situe de l'autre côté, ce côté dépendant d'une orientation du crochet.Such a spacer is obtained by momentary interruption of a spiraling to obtain the windings of the filament during manufacture of the filament. This interruption of the spiraling is a delicate operation which leads to a curvature of the random spacer, that is to say that the point of attachment can be located to the left or right of the axis of revolution of the hook of the metal rod. However, the Applicant has found that during an assembly operation of the filament and the metal rods of power supply, an insertion of the spacer in the hook of a metal rod is particularly difficult when the point of attachment is located on one side of the axis of revolution of the hook, and easier when the point of attachment is on the other side, this side depending on an orientation of the hook.

Or, dans une lampe de type de celle commercialisée sous la référence 6995Z, les deux tiges métalliques d'alimentation sont symétriques. Par conséquent, lorsque le point d'attache d'une entretoise se situe d'un côté de l'axe de révolution du crochet auquel elle est reliée et que le point d'attache de l'autre entretoise se situe de l'autre côté de l'axe de révolution du crochet auquel elle est reliée, l'assemblage du filament dans la lampe est difficile.However, in a lamp of the type marketed under the reference 6995Z, the two metal supply rods are symmetrical. Therefore, when the the point of attachment of a spacer is located on one side of the axis of revolution of the hook to which it is connected and that the point of attachment of the other spacer is located on the other side of the axis of revolution of the hook to which it is connected, the assembly of the filament in the lamp is difficult.

Cependant, même dans un cas où les deux tiges d'alimentation sont asymétriques, un problème semblable survient lorsque les deux points d'attache se situent d'un même coté des deux axes de révolution des crochets des tiges métalliques d'alimentation.However, even in a case where the two feed rods are asymmetrical, a similar problem occurs when the two attachment points are located on the same side of the two axes of revolution of the hooks of the metal supply rods.

Une telle situation entraîne un temps d'assemblage relativement élevé ainsi que des risques de rupture du filament.Such a situation leads to a relatively high assembly time as well as to the risk of filament failure.

Une lampe électrique incandescente telle que définie dans le paragraphe d'ouverture est également connu d'après le document de brevet EP0358061 . Ce document décrit en particulier une lampe avec une tige d'alimentation en courant et un filament. La tige est fixée sur le filament au moyen d'enfilage de la tige dans l'espace formé par les enroulements d'une partie du filament.An incandescent electric lamp as defined in the opening paragraph is also known from the patent document EP0358061 . This document describes in particular a lamp with a power supply rod and a filament. The rod is attached to the filament by threading the rod into the space formed by the windings of a portion of the filament.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

Un but de l'invention est de faciliter l'assemblage d'un filament dans une lampe incandescente. En particulier, l'invention a pour but de fournir une lampe ayant une autre, et de préférence une liaison améliorée entre la tige et le filament.An object of the invention is to facilitate the assembly of a filament in an incandescent lamp. In particular, the invention aims to provide a lamp having another, and preferably an improved bond between the rod and the filament.

Selon l'invention, une lampe électrique incandescente telle que définie dans le paragraphe d'ouverture est caractérisée en ce que l'entretoise comprend au moins deux enroulements étirés suivant une direction parallèle à l'axe de révolution du tronçon, et ce que la tige métallique comprend un crochet auquel l'entretoise est reliée.According to the invention, an incandescent electric lamp as defined in the opening paragraph is characterized in that the spacer comprises at least two windings stretched in a direction parallel to the axis of revolution of the section, and that the rod metal includes a hook to which the spacer is connected.

Par le terme « étirés », on entend que les enroulements de l'entretoise présentent entre eux un espacement plus important qu'un espacement des enroulements du tronçon ou de la partie secondaire. Par exemple, l'espacement entre deux enroulements du tronçon peut être de 0.2 millimètres et l'espacement entre deux enroulements de l'entretoise de 2 millimètres.By the term "drawn" is meant that the windings of the spacer have between them a spacing greater than a spacing of the windings of the section or the secondary part. For example, the spacing between two windings of the section may be 0.2 millimeters and the spacing between two windings of the spacer of 2 millimeters.

L'entretoise comprenant au moins deux enroulements possède au moins deux points d'attache possibles sur la tige métallique d'alimentation en courant. Au moins un de ces points d'attache se situe d'un côté de l'axe de révolution du crochet auquel l'entretoise est reliée, tel que l'insertion de l'entretoise dans le crochet est aisée. Ainsi, l'assemblage du filament dans la lampe est facilité.The spacer comprising at least two windings has at least two possible attachment points on the metal power supply rod. At least one of these attachment points is located on one side of the axis of revolution of the hook to which the spacer is connected, such that the insertion of the spacer into the hook is easy. Thus, the assembly of the filament in the lamp is facilitated.

L'invention permet également de faciliter l'assemblage d'un filament dans une lampe du type de celle commercialisée par la demanderesse sous la référence 6995Z et décrite dans l'état de la technique antérieure. En effet, si une seule des deux entretoises comprend au moins deux enroulements, une étape de placement permet de placer l'autre entretoise, lors de l'opération d'assemblage de la lampe, de telle sorte que son point d'attache se situe d'un côté de l'axe de révolution du crochet auquel elle est reliée, tel que l'insertion de l'entretoise dans le crochet est aisée. L'entretoise comprenant au moins deux enroulements aura alors nécessairement au moins un point d'attache se situant du côté de l'axe de révolution du crochet auquel elle est reliée, tel que l'insertion de l'entretoise dans le crochet est aisée. Par conséquent, l'assemblage du filament dans la lampe est facilité. Si les deux entretoises comprennent au moins deux enroulements, elles ont nécessairement chacune au moins un point d'attache se situant du côté de l'axe de révolution du crochet auquel elle sont reliées, tel que l'insertion de l'entretoise dans le crochet est aisée. Par conséquent, l'assemblage du filament dans la lampe est, dans un tel cas, facilité et ne nécessite pas l'étape de placement nécessaire lorsqu'une seule entretoise comprend au moins deux enroulements. Un tel raisonnement est valable aussi bien pour des tiges métalliques d'alimentation symétriques qu'asymétriques.The invention also facilitates the assembly of a filament in a lamp of the type marketed by the applicant under the reference 6995Z and described in the state of the prior art. Indeed, if only one of the two spacers comprises at least two windings, a placement step allows to place the other spacer, during the assembly operation of the lamp, so that its point of attachment is on one side of the axis of revolution of the hook to which it is connected, such that the insertion of the spacer into the hook is easy. The spacer comprising at least two windings will then necessarily have at least one attachment point located on the side of the axis of revolution of the hook to which it is connected, such that the insertion of the spacer into the hook is easy. Therefore, the assembly of the filament in the lamp is facilitated. If the two spacers comprise at least two windings, they necessarily each have at least one attachment point located on the side of the axis of revolution of the hook to which it is connected, such that the insertion of the spacer into the hook is easy . Therefore, the assembly of the filament in the lamp is, in such a case, facilitated and does not require the necessary placement step when a single spacer comprises at least two windings. Such reasoning is valid for both symmetrical and asymmetric feed rods.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

L'invention sera mieux comprise et d'autres détails apparaîtront dans la description qui va suivre en regard des dessins annexés qui sont donnés à titre d'exemples non limitatifs et dans lesquels :

  • les figures 1a et 1b sont respectivement une vue de face et une vue de gauche d'une lampe selon l'art antérieur ;
  • les figures 2a et 2b sont respectivement une vue de face et une vue de gauche d'une lampe selon un premier mode de réalisation de l'invention;
  • les figures 3a et 3b sont respectivement une vue de face et une vue de gauche d'une lampe selon un deuxième mode de réalisation de l'invention;
The invention will be better understood and other details will appear in the description which follows with reference to the accompanying drawings which are given by way of non-limiting examples and in which:
  • the Figures 1a and 1b are respectively a front view and a left view of a lamp according to the prior art;
  • the Figures 2a and 2b are respectively a front view and a left view of a lamp according to a first embodiment of the invention;
  • the Figures 3a and 3b are respectively a front view and a left view of a lamp according to a second embodiment of the invention;

EXPOSE DETAILLE D'AU MOINS UN MODE DE REALISATION DE L'INVENTIONDETAILED DESCRIPTION OF AT LEAST ONE EMBODIMENT OF THE INVENTION

Les figures 1a et 1b illustrent une lampe de l'art antérieur. Une description d'une telle lampe permet de comprendre un problème résolu par l'invention.The Figures 1a and 1b illustrate a lamp of the prior art. A description of such a lamp makes it possible to understand a problem solved by the invention.

Une telle lampe comprend un premier tronçon de filament 100, un deuxième tronçon de filament 101, une première partie secondaire 102, une deuxième partie secondaire 103, une première entretoise 104, une deuxième entretoise 105, une première tige métallique d'alimentation 106 comprenant un premier crochet 106a, une deuxième tige métallique d'alimentation 107 comprenant un deuxième crochet 107a, des ponts 120 et 121 reliés par des barres métalliques 122 et 123, des supports 124 et des boucles de filament 125. Le premier tronçon 100 possède un premier axe de révolution 110, le deuxième tronçon 101 possède un deuxième axe de révolution 111. Les axes de révolution des crochets 106a et 107a sont sensiblement confondus avec le premier axe de révolution 110 et le deuxième axe de révolution 111. Par la suite, on considèrera que l'axe de révolution du premier crochet 106a est le premier axe de révolution 110 et que l'axe de révolution du deuxième crochet 107a est le deuxième axe de révolution 111. Le filament comprend quatre tronçons situés en avant d'un plan formé par les supports 124. Le premier tronçon 100 est un des ces quatre tronçons. Le filament comprend également quatre tronçons situés en arrière d'un plan formé par les supports 124. Le deuxième tronçon 101 est un des ces quatre tronçons.Such a lamp comprises a first filament section 100, a second filament section 101, a first secondary portion 102, a second secondary portion 103, a first spacer 104, a second spacer 105, a first metal supply rod 106 comprising a first hook 106a, a second metal supply rod 107 comprising a second hook 107a, bridges 120 and 121 connected by metal bars 122 and 123, supports 124 and filament loops 125. The first section 100 has a first axis of revolution 110, the second section 101 has a second axis of revolution 111. The axes of revolution of the hooks 106a and 107a are substantially merged with the first axis of revolution 110 and the second axis of revolution 111. Thereafter, it will be considered that the axis of revolution of the first hook 106a is the first axis of revolution 110 and that the axis of revolution of the second hook 107a is e second axis of revolution 111. The filament comprises four sections situated in front of a plane formed by the supports 124. The first section 100 is one of these four sections. The filament includes also four sections located behind a plane formed by the supports 124. The second section 101 is one of these four sections.

Pour fabriquer un tel filament, un fil de tungstène est spiralé pour obtenir la première partie secondaire 102. Le spiralage est ensuite interrompu pour obtenir la première entretoise 104, puis repris pour obtenir une longue partie spiralée, puis de nouveau interrompu pour obtenir la deuxième entretoise 105 et enfin repris pour obtenir la deuxième partie secondaire 103. La longue partie spiralée est ensuite pliée en huit tronçons séparés par les boucles 125, et le filament ainsi obtenu subit un traitement thermique destiné à stabiliser une telle configuration en tronçons. Pour relier électriquement le premier tronçon 100 et la première tige métallique 106, on pourrait se contenter d'insérer un des enroulements du premier tronçon 100 dans le premier crochet 106a. Mais le traitement thermique a tendance à fragiliser le filament, de sorte qu'une telle opération risquerait de casser le filament. C'est pourquoi la première entretoise 104 est nécessaire. Il en est de même pour la deuxième entretoise 105.To manufacture such a filament, a tungsten wire is coiled to obtain the first secondary portion 102. The spiral is then interrupted to obtain the first spacer 104, then resumed to obtain a long spiral portion, then again interrupted to obtain the second spacer 105 and finally taken to obtain the second secondary portion 103. The long spiral portion is then folded into eight sections separated by the loops 125, and the filament thus obtained undergoes a heat treatment for stabilizing such a configuration in sections. To electrically connect the first section 100 and the first metal rod 106, one could simply insert one of the windings of the first section 100 in the first hook 106a. But the heat treatment tends to weaken the filament, so that such an operation could break the filament. This is why the first spacer 104 is necessary. It is the same for the second spacer 105.

Cependant, les première et deuxième entretoises 104 et 105 sont réalisées de telle sorte qu'elles présentent une courbure aléatoire. Lorsque cette courbure est vers la gauche par rapport à l'axe de révolution du crochet auquel l'entretoise est reliée, comme c'est le cas pour la première entretoise 104, l'insertion de la première entretoise 104 dans le premier crochet 106a est aisée. En effet, il suffit de placer la première entretoise 104 et la première partie secondaire 102 à droite du premier crochet 106a, de décaler la première entretoise 104 vers l'avant, puis vers la gauche et enfin vers l'arrière afin qu'elle s'insère dans le premier crochet 106a.However, the first and second struts 104 and 105 are made such that they have a random curvature. When this curvature is to the left relative to the axis of revolution of the hook to which the spacer is connected, as is the case for the first spacer 104, the insertion of the first spacer 104 into the first hook 106a is easy. Indeed, it is sufficient to place the first spacer 104 and the first secondary portion 102 to the right of the first hook 106a, to shift the first spacer 104 forwards, then to the left and finally to the rear so that it inserts into the first hook 106a.

Durant une telle opération, la première partie secondaire 102 ne vient pas percuter la première tige métallique 106. Mais lorsque la courbure d'une entretoise est vers la droite par rapport à l'axe de révolution du crochet auquel l'entretoise est reliée, comme c'est le cas pour la deuxième entretoise 105, l'insertion de la deuxième entretoise 105 dans le deuxième crochet 107a est difficile. En effet, lorsque l'on décale la deuxième entretoise vers la gauche, c'est à dire vers la droite sur la figure 1a ou vers l'arrière sur la figure 1b, la deuxième partie secondaire 103 vient percuter la deuxième tige métallique 107. Ainsi, pour insérer la deuxième entretoise 105 dans le deuxième crochet 107a, il est nécessaire d'appliquer une force supplémentaire à la deuxième entretoise 105, ce qui risque de casser cette deuxième entretoise 105.During such an operation, the first secondary portion 102 does not strike the first metal rod 106. But when the curvature of a spacer is to the right with respect to the axis of revolution of the hook to which the spacer is connected, as this is the case for the second spacer 105, the insertion of the second spacer 105 in the second hook 107a is difficult. Indeed, when we shift the second spacer to the left, ie to the right on the figure 1a or backwards on the figure 1b the second secondary part 103 strikes the second metal rod 107. Thus, in order to insert the second spacer 105 into the second hook 107a, it is necessary to apply an additional force to the second spacer 105, which risks breaking this second spacer 105.

Les figures 2a et 2b illustrent une lampe selon un premier mode de réalisation de l'invention. Une telle lampe comprend des éléments identiques à ceux décrits dans la description des figures 1a et 1b. Cependant, dans ce premier mode de réalisation, une des deux entretoises comprend au moins deux enroulements étirés suivant une direction parallèle à l'axe de révolution du tronçon auquel elle est reliée. Dans l'exemple représenté sur les figures 2a et 2b, la deuxième entretoise 105 comprend deux enroulements étirés suivant le deuxième axe de révolution 111. Un tel étirement peut être obtenu en appliquant une force de traction dirigée suivant le deuxième axe de révolution 111 à la longue partie spiralée obtenue par spiralage du fil de tungstène. Cette force est appliquée avant le traitement thermique de façon à obtenir la deuxième entretoise 105 composée de deux enroulements de filament, un à gauche, l'autre à droite du deuxième axe de révolution 111. Elle peut être appliquée avant ou après pliage de la longue partie spiralée.The Figures 2a and 2b illustrate a lamp according to a first embodiment of the invention. Such a lamp comprises elements identical to those described in the description of the Figures 1a and 1b . However, in this first embodiment, one of the two spacers comprises at least two windings stretched in a direction parallel to the axis of revolution of the section to which it is connected. In the example shown on the Figures 2a and 2b , the second spacer 105 comprises two windings stretched along the second axis of revolution 111. Such stretching can be obtained by applying a traction force directed along the second axis of revolution 111 to the long spiral part obtained by spiraling the tungsten wire. This force is applied before the heat treatment so as to obtain the second spacer 105 composed of two filament windings, one on the left, the other on the right of the second axis of revolution 111. It can be applied before or after folding the long spiral part.

Un tel étirement peut également être obtenu par modification du spiralage au niveau de la deuxième entretoise 105. En effet, lors du spiralage, on peut régler un écartement entre deux enroulements successifs du filament. Il est donc possible de définir un écartement plus important pour les deux enroulements constituant la deuxième entretoise 105.Such stretching can also be obtained by modifying the spiraling at the level of the second spacer 105. Indeed, during the spiraling, it is possible to adjust a spacing between two successive windings of the filament. It is therefore possible to define a larger gap for the two windings constituting the second spacer 105.

Dans l'exemple illustré sur les figures 2a et 2b, l'insertion du filament dans la lampe s'effectue de la manière suivante. Une étape de placement permet tout d'abord d'insérer la première entretoise 104 dans le crochet pour lequel l'insertion est aisée. Dans cet exemple, le point d'attache de l'entretoise 104 se situant à gauche de l'axe de révolution du premier crochet 106a et à droite de l'axe de révolution du deuxième crochet 107a, la première entretoise 104 est insérée dans le premier crochet 106a puisque cette insertion est aisée, comme il a été expliqué dans la description des figures 1a et 1b. La deuxième entretoise 105 possédant maintenant nécessairement un point d'attache situé à gauche de l'axe de révolution du deuxième crochet 107a, son insertion dans ce deuxième crochet 107a est également aisée.In the example shown on the Figures 2a and 2b , the insertion of the filament into the lamp is carried out as follows. A placement step first allows to insert the first spacer 104 in the hook for which insertion is easy. In this example, the point of attachment of the spacer 104 lying to the left of the axis of revolution of the first hook 106a and to the right of the axis of revolution of the second hook 107a, the first spacer 104 is inserted into the first hook 106a since this insertion is easy, as explained in the description of the Figures 1a and 1b . The second spacer 105 now necessarily having a point of attachment to the left of the axis of revolution of the second hook 107a, its insertion into the second hook 107a is also easy.

Les figures 3a et 3b illustrent une lampe selon un deuxième mode de réalisation de l'invention. Une telle lampe comprend des éléments identiques à ceux décrits dans la description des figures 1a et 1b. Cependant, dans ce deuxième mode de réalisation, les deux entretoises comprennent au moins deux enroulements étirés suivant une direction parallèle à l'axe de révolution du tronçon auquel elle sont reliées. Un tel étirement est obtenu comme il a été décrit dans la description des figures 2a et 2b.The Figures 3a and 3b illustrate a lamp according to a second embodiment of the invention. Such a lamp comprises elements identical to those described in the description of the Figures 1a and 1b . However, in this second embodiment, the two spacers comprise at least two windings stretched in a direction parallel to the axis of revolution of the section to which it is connected. Such stretching is achieved as described in the description of Figures 2a and 2b .

Dans l'exemple représenté sur les figures 3a et 3b, les deux entretoises 104 et 105 comprennent chacune deux enroulements étirés suivant les axes de révolution 110 et 111. Chacune des entretoises 104 et 105 comprend un point d'attache situé d'un côté de l'axe de révolution du crochet auquel elle est reliée, tel que l'insertion de l'entretoise dans le crochet est aisée. Ainsi, l'insertion du filament dans la lampe est aisée, et l'étape de placement nécessaire dans la lampe illustrée sur les figures 2a et 2b est inutile.In the example shown on the Figures 3a and 3b , the two spacers 104 and 105 each comprise two windings stretched along the axes of revolution 110 and 111. Each of the spacers 104 and 105 comprises a point of attachment located on one side of the axis of revolution of the hook to which it is connected. , such that the insertion of the spacer into the hook is easy. Thus, the insertion of the filament into the lamp is easy, and the necessary placement step in the lamp illustrated on the Figures 2a and 2b is useless.

La description ci-dessus en référence aux figures illustre l'invention plutôt qu'elle ne la limite. A cet égard, quelques remarques sont faites ci-dessous. Les figures 2a à 3b illustrent des exemples de mise en oeuvre de l'invention. Le filament utilisé est un filament de tungstène obtenu par spiralage d'un fil de tungstène. Bien entendu, d'autres matériaux peuvent être utilisés pour fabriquer un tel filament, dès lors que ces matériaux permettent d'émettre de la lumière lorsqu'ils sont traversés par un courant électrique.The above description with reference to the figures illustrates the invention rather than limiting it. In this regard, some remarks are made below. The Figures 2a to 3b illustrate examples of implementation of the invention. The filament used is a tungsten filament obtained by spiraling a tungsten wire. Of course, other materials can be used to manufacture such a filament, since these materials can emit light when traversed by an electric current.

Sur les figures 2a et 2b, le filament représenté possède plusieurs tronçons de longueurs sensiblement équivalentes, disposé dans deux plans. Bien entendu, on peut, sans s'éloigner de l'invention comme définie dans la revendication 1, utiliser des filaments possédant des configurations différentes, par exemple des filaments comprenant un nombre de tronçons différent, par exemple un seul tronçon, ou des longueurs de tronçons différant d'un tronçon à un autre.On the Figures 2a and 2b , the filament shown has several sections of substantially equivalent lengths, arranged in two planes. Of course, it is possible, without departing from the invention as defined in claim 1, to use filaments having different configurations, for example filaments comprising a number of different sections, for example a single section, or lengths of sections differing from one section to another.

Les figures 1a à 3c illustrent une lampe possédant deux tiges d'alimentation métalliques d'alimentation comprenant un crochet. L'invention s'applique également à une lampe possédant un nombre différents de tiges métalliques d'alimentation comprenant un crochet, notamment à une lampe comprenant un filament dont une extrémité est soudée à une tige métallique et une autre extrémité est accrochée à une autre tige métallique d'alimentation grâce à un système d'accrochage tel que celui décrit dans l'invention.The Figures 1a to 3c illustrate a lamp having two metal feed rods including a hook. The invention also applies to a lamp having a different number of metal feed rods including a hook, including a lamp comprising a filament whose one end is welded to a metal rod and another end is attached to another rod metallic feed through a fastening system as described in the invention.

Claims (1)

  1. Incandescent electric lamp at least comprising:
    - a filament having at least one portion (100) comprising coils arranged in a spiral pattern around an axis of revolution (110), and a secondary part (102) connected to the portion by a spacer (104); and
    - a metal current supply rod (106), the second part being secured to the metal rod by the spacer;
    said lamp being characterised in that the spacer comprises at least two coils stretched in a direction parallel to the axis of revolution of the portion, and in that the metal rod comprises a hook (106a) to which the spacer is connected.
EP02079268.5A 2001-10-23 2002-10-16 System for hooking a filament to an inlead Expired - Lifetime EP1308988B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0113671 2001-10-23
FR0113671 2001-10-23

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US20050102638A1 (en) * 2003-11-10 2005-05-12 Jiang Zhaowei C. Navigate, click and drag images in mobile applications

Citations (1)

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EP0358061A2 (en) * 1988-09-06 1990-03-14 General Electric Company Electric incandescent lamp and method of manufacture therefor

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US7012369B2 (en) 2006-03-14
EP1308988A1 (en) 2003-05-07
CN1309012C (en) 2007-04-04
JP2003162982A (en) 2003-06-06
CN1414601A (en) 2003-04-30
US20030076036A1 (en) 2003-04-24

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