EP1745501B1 - Spiral-wound filament for an incandescent lamp and incandescent lamp - Google Patents

Spiral-wound filament for an incandescent lamp and incandescent lamp Download PDF

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Publication number
EP1745501B1
EP1745501B1 EP05748161A EP05748161A EP1745501B1 EP 1745501 B1 EP1745501 B1 EP 1745501B1 EP 05748161 A EP05748161 A EP 05748161A EP 05748161 A EP05748161 A EP 05748161A EP 1745501 B1 EP1745501 B1 EP 1745501B1
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EP
European Patent Office
Prior art keywords
incandescent
filament
lamp
lamp vessel
incandescent lamp
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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
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EP05748161A
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German (de)
French (fr)
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EP1745501A1 (en
Inventor
Frank Glöckler
Christoph Krieglmeyer
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Osram GmbH
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Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H01K1/325—Reflecting coating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/38—Seals for leading-in conductors

Definitions

  • the invention relates to an incandescent lamp according to the preamble of patent claim 1.
  • the publication EP 1 255 279 A2 describes a halogen incandescent lamp whose dimension transverse to its longitudinal extent is only a maximum of 6 mm. This lamp is intended for use in a torch.
  • the incandescent filament of this halogen incandescent lamp has two filament outlets, each welded to a power supply wire.
  • JP-A-50-038975 discloses an incandescent filament for an incandescent lamp with L-shaped spiral outlets, which are arranged in a common plane, offset parallel to the winding axis.
  • the publication GAB 1,092,405 describes a manufacturing method for an incandescent filament, which has two angled Wendelab réelle extending in an axis outside the winding axis.
  • the patent US 5,187,405 discloses an incandescent lamp with two incandescent filaments whose spiral outlets formed angled and arranged in a plane parallel offset from the winding axis of the incandescent filaments.
  • the two spiral outlets of the filament of the incandescent lamp according to the invention each have an angled leg, which are arranged in a common, parallel to the winding axis of the filament extending plane.
  • the two filament outlets of the incandescent filament of the incandescent lamp according to the invention are each preferably L-shaped. That is, each spiral outlet is only once, and at right angles angled.
  • a first L-leg of each helical departure is connected to the responsible for the light emission portion of the filament, while a second L-leg thereof is bent at right angles, so that these second L-legs of the two Wendelab réelle in a common, offset parallel to the winding axis the filament extending plane are arranged.
  • the invention is particularly well suited for use in halogen incandescent lamps which, for the purpose of a directed light emission, have an axially symmetrical lamp vessel provided with a light-reflecting coating and an axially aligned filament arranged parallel to the lamp vessel axis.
  • the incandescent lamp according to the invention has an axisymmetric, translucent lamp vessel which is sealed at one end and provided with current feedthroughs, as well as an axially aligned in the lamp vessel, offset parallel to the Lamp filament axis disposed filament, wherein the filament two Wendelab sau each with an angled leg, which are arranged in a common plane parallel to the winding axis of the filament extending plane, and wherein the angled legs each with a embedded in the sealed end of the lamp vessel power supply part are connected.
  • This ensures a reliable, off-center mounting of the filament in the lamp vessel without additional measures.
  • no complex frame structure for spiral holder is necessary
  • the power supply parts embedded in the sealed end of the lamp vessel, with which the angled legs are connected are each advantageously a metal foil, in particular a molybdenum foil, which on the one hand serve as a current supply for the incandescent filament and on the other hand are suitable for sealing the lamp vessel, since they can be sealed gastight in the sealed end of the lamp vessel.
  • the lamp vessel of the incandescent lamp according to the invention is provided with a light-reflecting coating which extends over a part of the circumference of the lamp vessel, and the incandescent filament is arranged offset parallel to the lamp vessel axis in the direction of the light-reflecting coating in order to achieve a directed light emission in a preferred solid angle.
  • Illustrated incandescent filaments 110 and 110 ' are simply coiled incandescent filaments made of tungsten wire, which are suitable for a low-voltage halogen incandescent lamp with an electrical power consumption of about 20 watts are provided.
  • These incandescent filaments 110 and 110 ' have a wound region 1101 or 1101', which is responsible for the light emission, and two uncoiled filament outlets 1102, 1103 or 1102 ', 1103' connected thereto.
  • These spiral outlets 1102, 1103 and 1102 ', 1103' each have an angled leg 11021, 11031 and 11021 ', 11031'.
  • the angled legs 11021, 11031 of the two spiral outlets 1102, 11, 03 are arranged in a common plane, which is offset parallel to the winding axis of the incandescent filament 110.
  • the two legs 11021, 11031 also run parallel to one another.
  • An analogous statement also applies to the angled legs 11021 ', 11031' of the two helical outlets 1102 ', 1103' of the incandescent filament 110 'according to the second exemplary embodiment.
  • the helical outlets 1102, 1103 and 1102 ', 1103' of the filament 110 and 110 ' are L-shaped, that is, they are angled only once at right angles.
  • a first L-leg 11022, 11032 or 11022 ', 11032' is directly connected to the area 1101 or 1101 'of the incandescent filament 110 or 110' responsible for the light emission, while the second L-leg 11021, 11031 or 11021 ', 11031' is angled at right angles from the respective first L-leg.
  • the second L-limbs 11021, 11031 of the two helical outlets of the incandescent filament 110 are each provided with a molybdenum foil 123, 124 embedded in the sealed end 101 of the lamp vessel 100 in the FIGS. 3 and 4 welded halogen bulb.
  • An analogous statement also applies to the L-limbs 11021 ', 11031' of the helical outlets of the incandescent filament 110 'according to the second exemplary embodiment, if this is used instead of the incandescent filament 110 in the lamp.
  • the incandescent filaments 110, 110 'each have an outer diameter of 2.27 mm and their responsible for the light emission Gewickel has a length of 4.19 mm. These filaments are designed for a nominal voltage of 12 volts and an electrical output of 20 watts.
  • the light bulb according to the invention is a halogen incandescent lamp with an electrical power consumption of about 20 watts.
  • This lamp has a lamp vessel 100 made of quartz glass, which is closed gas-tight at one end by means of a pinch seal 101.
  • the lamp vessel 100 further has a circular-cylindrical vessel section 102 and a pump stalk extension 103 arranged diametrically to the pinch seal 101.
  • Within the lamp vessel 100 is an incandescent filament 110 according to FIG. 1 arranged.
  • the angled limbs 11021, 11031 of their two spiral outlets are each connected to a molybdenum foil 123, 124 embedded in the pinch seal 101 gas-tight.
  • the molybdenum foils 123, 124 are each connected to a protruding from the pinch seal 101 pin 125, 126 of the halogen incandescent lamp.
  • the circular-cylindrical vessel section 102 is provided with a light-reflecting coating 104 on its outer surface.
  • the coating 104 extends over 50 percent of the circumference of the circular-cylindrical vessel portion 102 and extends to the exhaust nozzle extension 103. In other words, the coating 104 covers a half-shell of the cylindrical lamp vessel portion 102 and is continued up to the exhaust nozzle extension 103.
  • the coating 104 consists of a first light-reflecting silver layer applied directly on the surface of the lamp vessel, a second opaque chromium layer applied thereto and a third SiO 2 protective layer arranged on the chromium layer.
  • the filament 110 is axially aligned and arranged offset parallel to the cylinder axis AA of the circular cylindrical vessel portion 102.
  • the outer diameter of the lamp vessel 100 is 9.5 mm and its wall thickness 1 mm.
  • the axis 1104 of the incandescent filament 110 which is identical to its winding axis, is displaced in parallel by 2 mm relative to the cylinder axis AA in the direction of the coating 104.
  • the two angled legs 11021 and 11031 of the spiral outlets of the incandescent filament 110 are welded to the molybdenum foil 123 or 124.
  • the two are angled Leg 11021 and 11031 in a common plane, ie in the plane of the molybdenum foils 123, 124, which also contains the cylinder axis AA, arranged and parallel to each other.
  • the axis, that is, the winding axis 1104 of the filament 110 is outside the aforementioned plane, arranged offset by 2 mm parallel to the cylinder axis AA.
  • the winding axis 1104 of the incandescent filament 110 extends approximately 2 mm below the plane defined by the angled legs 11021 and 11031.
  • the pinch seal 101 is disposed in a G4 socket (not shown).
  • the invention is not limited to the above-described embodiments of the invention.
  • a so-called cold-light mirror which is transparent to infrared radiation and reflects electromagnetic radiation from the visible spectral range.
  • the two angled L-legs 11021, 11031 arranged in a common plane do not necessarily have to run parallel to one another, but their spacing may increase, for example, in the direction of the molybdenum foils 123, 124.
  • the invention can also be applied to incandescent lamps and filaments of power levels other than 20 watts.

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Abstract

A spiral-wound filament ( 110 ) for an incandescent lamp, includes two lead-in wires ( 1102, 1103 ), the lead-in wires ( 1102, 1103 ) having one bent limb ( 11021, 11031 ) each which are arranged in a joint plane that extends off-set in parallel to the winding axis ( 1104 ) of the spiral-wound filament ( 110 ). An incandescent lamp that has an axially symmetric lamp base ( 100 ) and a spiral-wound filament ( 110 ) that is off-set in parallel to the lamp base axis (A-A) is also disclosed.

Description

Die Erfindung betrifft eine Glühlampe gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an incandescent lamp according to the preamble of patent claim 1.

1. Stand der Technik 1. State of the art

Die Offenlegungsschrift EP 1 255 279 A2 beschreibt eine Halogenglühlampe, deren Abmessung quer zu ihrer Längserstreckung maximal nur 6 mm beträgt. Diese Lampe ist zum Einsatz in einer Taschenleuchte vorgesehen. Die Glühwendel dieser Halogenglühlampe besitzt zwei Wendelabgänge, die jeweils mit einem Stromzuführungsdraht verschweißt sind.The publication EP 1 255 279 A2 describes a halogen incandescent lamp whose dimension transverse to its longitudinal extent is only a maximum of 6 mm. This lamp is intended for use in a torch. The incandescent filament of this halogen incandescent lamp has two filament outlets, each welded to a power supply wire.

Die Offenlegungsschrift JP-A-50-038975 offenbart eine Glühwendel für eine Glühlampe mit L-formig ausgebildeten Wendelabgängen, die in einer gemeinsamen Ebene, parallel versetzt zur Wickelachse angeordnet sind.The publication JP-A-50-038975 discloses an incandescent filament for an incandescent lamp with L-shaped spiral outlets, which are arranged in a common plane, offset parallel to the winding axis.

Die Offenlegungsschrift GAB 1,092,405 beschreibt ein Herstellungsverfahren für eine Glühwendel, die zwei abgewinkelte, in einer Achse außerhalb der Wickelachse verlaufende Wendelabgänge besitzt.The publication GAB 1,092,405 describes a manufacturing method for an incandescent filament, which has two angled Wendelabgänge extending in an axis outside the winding axis.

Die Patentschrift US 5,187,405 offenbart eine Glühlampe mit zwei Glühwendeln, deren Wendelabgänge abgewinkelt ausgebildet und in einer Ebene parallel versetzt zur Wickelachse der Glühwendeln angeordnet sind.The patent US 5,187,405 discloses an incandescent lamp with two incandescent filaments whose spiral outlets formed angled and arranged in a plane parallel offset from the winding axis of the incandescent filaments.

Die Patentschrift US 4,174,487 beschreibt eine Glühlampe, deren Lampengefäß einen als Reflektor und einen als optische Linse ausgebildeten Abschnitt besitzt.The patent US 4,174,487 describes an incandescent lamp whose lamp vessel has a designed as a reflector and an optical lens section.

II. Darstellung der Erfindung II. Presentation of the invention

Es ist die Aufgabe der Erfindung, eine Glühlampe mit einer innerhalb eines axialsymmetrischen Lampengefäßes angeordneten Glühwendel und einer in einen bevorzugten Raumwinkel gerichteten Lichtabstrahlung bereitzustellen.It is the object of the invention to provide an incandescent lamp with an incandescent filament arranged within an axisymmetric lamp vessel and a light emission directed in a preferred solid angle.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den abhängigen Patentansprüchen beschrieben.This object is achieved by the features of claim 1. Particularly advantageous embodiments of the invention are described in the dependent claims.

Die beiden Wendelabgänge der Glühwendel der erfindungsgemäßen Glühlampe weisen jeweils einen abgewinkelten Schenkel auf, die in einer gemeinsamen, parallel versetzt zur Wickelachse der Glühwendel verlaufenden Ebene angeordnet sind. Dadurch kann in einem axialsymmetrischen Lampengefäß, das an einem Ende abgedichtet ist, ohne zusätzliche Maßnahmen eine axiale Ausrichtung der Glühwendel, parallel versetzt zur Symmetrieachse des Lampengefäßes realisiert werden. Zu diesem Zweck genügt es, dass die abgewinkelten Wendelabgänge jeweils mit einem in dem abgedichteten Ende des Lampengefäßes eingebetteten Stromzuführungsteil verbunden sind. Insbesondere kann daher auf ein Gestell zur Halterung der Glühwendel in dem Lampengefäß verzichtet werden.The two spiral outlets of the filament of the incandescent lamp according to the invention each have an angled leg, which are arranged in a common, parallel to the winding axis of the filament extending plane. As a result, in an axially symmetrical lamp vessel, which is sealed at one end, without additional measures, an axial alignment of the incandescent filament can be realized parallel to the symmetry axis of the lamp vessel. For this purpose, it is sufficient that the angled coil outlets are each connected to an embedded in the sealed end of the lamp vessel power supply part. In particular, therefore, can be dispensed with a frame for holding the filament in the lamp vessel.

Vorzugsweise sind die beiden Wendelabgänge der Glühwendel der erfindungsgemäßen Glühlampe jeweils L-förmig ausgebildet. Das heißt, jeder Wendelabgang ist nur einmal und zwar rechtwinklig abgewinkelt. Ein erster L-Schenkel jedes Wendelabgangs ist mit dem für die Lichtemission verantwortlichen Bereich der Glühwendel verbunden, während ein zweiter L-Schenkel davon im rechten Winkel abgewinkelt ist, so dass diese zweiten L-Schenkel der beiden Wendelabgänge in einer gemeinsamen, parallel versetzt zur Wickelachse der Glühwendel verlaufenden Ebene angeordnet sind.The two filament outlets of the incandescent filament of the incandescent lamp according to the invention are each preferably L-shaped. That is, each spiral outlet is only once, and at right angles angled. A first L-leg of each helical departure is connected to the responsible for the light emission portion of the filament, while a second L-leg thereof is bent at right angles, so that these second L-legs of the two Wendelabgänge in a common, offset parallel to the winding axis the filament extending plane are arranged.

Die Erfindung eignet sich besonders gut zum Einsatz in Halogenglühlampen, die zum Zweck einer gerichteten Lichtabstrahlung ein mit einer lichtreflektierenden Beschichtung versehenes, axialsymmetrisches Lampengefäß und eine axial ausgerichtete, parallel versetzt zur Lampengefäßachse angeordnete Glühwendel aufweisen.The invention is particularly well suited for use in halogen incandescent lamps which, for the purpose of a directed light emission, have an axially symmetrical lamp vessel provided with a light-reflecting coating and an axially aligned filament arranged parallel to the lamp vessel axis.

Die erfindungsgemäße Glühlampe weist ein axialsymmetrisches, lichtdurchlässiges Lampengefäß, das an einem Ende abgedichtet und mit Stromdurchführungen versehen ist, sowie eine axial in dem Lampengefäß ausgerichtete, parallel versetzt zur Lampengefäßachse angeordnete Glühwendel auf, wobei die Glühwendel zwei Wendelabgänge mit jeweils einem abgewinkelten Schenkel, die in einer gemeinsamen, parallel versetzt zur Wickelachse der Glühwendel verlaufenden Ebene angeordnet sind, besitzt, und wobei die abgewinkelten Schenkel jeweils mit einem in dem abgedichteten Ende des Lampengefäßes eingebetteten Stromzuführungsteil verbunden sind. Dadurch wird ohne zusätzliche Maßnahmen eine zuverlässige, außermittige Halterung der Glühwendel in dem Lampengefäß gewährleistet. Insbesondere ist kein aufwändiger Gestellaufbau zur Wendelhalterung nötigThe incandescent lamp according to the invention has an axisymmetric, translucent lamp vessel which is sealed at one end and provided with current feedthroughs, as well as an axially aligned in the lamp vessel, offset parallel to the Lamp filament axis disposed filament, wherein the filament two Wendelabgänge each with an angled leg, which are arranged in a common plane parallel to the winding axis of the filament extending plane, and wherein the angled legs each with a embedded in the sealed end of the lamp vessel power supply part are connected. This ensures a reliable, off-center mounting of the filament in the lamp vessel without additional measures. In particular, no complex frame structure for spiral holder is necessary

Bei den in dem abgedichteten Ende des Lampengefäßes eingebetteten Stromzuführungsteilen, mit denen die abgewinkelten Schenkel verbunden sind, handelt es sich vorteilhafter Weise jeweils um eine Metallfolie, insbesondere eine Molybdänfolie, die einerseits als Stromzuführung für die Glühwendel dienen und sich andererseits zur Abdichtung des Lampengefäßes eignen, da sie gasdicht in dem abgedichteten Ende des Lampengefäßes eingeschmolzen werden können.The power supply parts embedded in the sealed end of the lamp vessel, with which the angled legs are connected, are each advantageously a metal foil, in particular a molybdenum foil, which on the one hand serve as a current supply for the incandescent filament and on the other hand are suitable for sealing the lamp vessel, since they can be sealed gastight in the sealed end of the lamp vessel.

Das Lampengefäß der erfindungsgemäßen Glühlampe ist mit einer lichtreflektierenden Beschichtung versehen, die sich über einen Teil des Umfangs des Lampengefäßes erstreckt, und die Glühwendel ist in Richtung der lichtreflektierenden Beschichtung parallel versetzt zur Lampengefäßachse angeordnet, um eine gerichtete Lichtabstrahlung in einen bevorzugten Raumwinkel zu erreichen.The lamp vessel of the incandescent lamp according to the invention is provided with a light-reflecting coating which extends over a part of the circumference of the lamp vessel, and the incandescent filament is arranged offset parallel to the lamp vessel axis in the direction of the light-reflecting coating in order to achieve a directed light emission in a preferred solid angle.

III. Beschreibung des bevorzugten Ausführungsbeispiels III. Description of the Preferred Embodiment

Nachstehend wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels näher erläutert. Es zeigen:

Figur 1
Eine Glühwendel für eine Glühlampe gemäß des ersten Ausführungsbeispiels der Erfindung
Figur 2
Eine Glühwendel für eine Glühlampe gemäß des zweiten Ausführungsbeispiels der Erfindung
Figur 3
Eine Seitenansicht einer Glühlampe gemäß des bevorzugten Ausführungsbeispiels der Erfindung in schematischer Darstellung
Figur 4
Eine schematische Darstellung der in Figur 3 abgebildeten Glühlampe in einer gegenüber der Figur 3 um einen Winkel von 90 Grad um die Längsachse gedrehten Seitenansicht
The invention will be explained in more detail below with reference to a preferred embodiment. Show it:
FIG. 1
An incandescent filament for an incandescent lamp according to the first embodiment of the invention
FIG. 2
An incandescent filament for an incandescent lamp according to the second embodiment of the invention
FIG. 3
A side view of an incandescent lamp according to the preferred embodiment of the invention in a schematic representation
FIG. 4
A schematic representation of the in FIG. 3 Pictured light bulb in a opposite of the FIG. 3 Side view rotated by 90 degrees about the longitudinal axis

Bei den in den Figuren 1 und 2 abgebildeten Glühwendeln 110 bzw. 110' handelt es sich um einfach gewendelte Glühwendeln aus Wolframdraht, die für eine Niedervolt-Halogenglühlampe mit einer elektrischen Leistungsaufnahme von ungefähr 20 Watt vorgesehen sind. Diese Glühwendeln 110 bzw. 110' besitzen ein für die Lichtemission verantwortlichen gewickelten Bereich 1101 bzw. 1101' sowie zwei damit verbundene ungewendelte Wendelabgänge 1102, 1103 bzw. 1102', 1103'. Diese Wendelabgänge 1102, 1103 bzw. 1102', 1103' besitzen jeweils einen abgewinkelten Schenkel 11021, 11031 bzw. 11021', 11031'. Die abgewinkelten Schenkel 11021, 11031 der beiden Wendelabgänge 1102, 11,03 sind in einer gemeinsamen, parallel versetzt zur Wickelachse der Glühwendel 110 verlaufenden Ebene angeordnet. Außerdem verlaufen die beiden Schenkel 11021, 11031 auch parallel zueinander. Eine analoge Aussage gilt auch für die abgewinkelten Schenkel 11021', 11031' der beiden Wendelabgänge 1102', 1103' der Glühwendel 110' gemäß des zweiten Ausführungsbeispiels. Die Wendelabgänge 1102, 1103 bzw. 1102', 1103' der Glühwendel 110 bzw. 110' sind L-förmig ausgebildet, das heißt, sie sind nur einmal rechtwinklig abgewinkelt. Ein erster L-Schenkel 11022, 11032 bzw. 11022', 11032' ist unmittelbar mit dem für die Lichtemission verantwortlichen Bereich 1101 bzw. 1101' der Glühwendel 110 bzw. 110' verbunden, während der zweite L-Schenkel 11021, 11031 bzw. 11021', 11031' im rechten Winkel von dem jeweiligen ersten L-Schenkel abgewinkelt ist.In the in the Figures 1 and 2 Illustrated incandescent filaments 110 and 110 'are simply coiled incandescent filaments made of tungsten wire, which are suitable for a low-voltage halogen incandescent lamp with an electrical power consumption of about 20 watts are provided. These incandescent filaments 110 and 110 'have a wound region 1101 or 1101', which is responsible for the light emission, and two uncoiled filament outlets 1102, 1103 or 1102 ', 1103' connected thereto. These spiral outlets 1102, 1103 and 1102 ', 1103' each have an angled leg 11021, 11031 and 11021 ', 11031'. The angled legs 11021, 11031 of the two spiral outlets 1102, 11, 03 are arranged in a common plane, which is offset parallel to the winding axis of the incandescent filament 110. In addition, the two legs 11021, 11031 also run parallel to one another. An analogous statement also applies to the angled legs 11021 ', 11031' of the two helical outlets 1102 ', 1103' of the incandescent filament 110 'according to the second exemplary embodiment. The helical outlets 1102, 1103 and 1102 ', 1103' of the filament 110 and 110 'are L-shaped, that is, they are angled only once at right angles. A first L-leg 11022, 11032 or 11022 ', 11032' is directly connected to the area 1101 or 1101 'of the incandescent filament 110 or 110' responsible for the light emission, while the second L-leg 11021, 11031 or 11021 ', 11031' is angled at right angles from the respective first L-leg.

Die zweiten L-Schenkel 11021, 11031 der beiden Wendelabgänge der Glühwendel 110 sind jeweils mit einer in dem abgedichteten Ende 101 des Lampengefäßes 100 eingebetteten Molybdänfolie 123, 124 der in den Figuren 3 und 4 abgebildeten Halogenglühlampe verschweißt. Eine analoge Aussage gilt auch für die L-Schenkel 11021', 11031' der Wendelabgänge der Glühwendel 110' gemäß des zweiten Ausführungsbeispiels, wenn diese statt der Glühwendel 110 in der Lampe verwendet wird.The second L-limbs 11021, 11031 of the two helical outlets of the incandescent filament 110 are each provided with a molybdenum foil 123, 124 embedded in the sealed end 101 of the lamp vessel 100 in the FIGS. 3 and 4 welded halogen bulb. An analogous statement also applies to the L-limbs 11021 ', 11031' of the helical outlets of the incandescent filament 110 'according to the second exemplary embodiment, if this is used instead of the incandescent filament 110 in the lamp.

Die Glühwendeln 110, 110' besitzen jeweils einen Außendurchmesser von 2,27 mm und ihr für die Lichtemission verantwortliches Gewickel besitzt eine Länge von 4,19 mm. Diese Glühwendeln sind für eine Nennspannung von 12 Volt und eine elektrische Leistung von 20 Watt konstruiert.The incandescent filaments 110, 110 'each have an outer diameter of 2.27 mm and their responsible for the light emission Gewickel has a length of 4.19 mm. These filaments are designed for a nominal voltage of 12 volts and an electrical output of 20 watts.

Die beiden Glühwendeln 110, 110' unterscheiden sich nur durch den Winkel, den die ersten L-Schenkel 11022, 11032 bzw. 11022', 11032' der beiden Wendelabgänge der jeweiligen Glühwendel miteinander einschließen.The two incandescent filaments 110, 110 'differ only by the angle which the first L-legs 11022, 11032 or 11022', 11032 'of the two filament outlets of the respective incandescent filament form with one another.

Bei dem in den Figuren 3 und 4 abgebildeten Ausführungsbeispiel der erfindungsgemäßen Glühlampe handelt es sich um eine Halogenglühlampe mit einer elektrischen Leistungsaufnahme von ungefähr 20 Watt. Diese Lampe besitzt ein Lampengefäß 100 aus Quarzglas, das an einem Ende mittels einer Quetschdichtung 101 gasdicht verschlossen ist. Das Lampengefäß 100 weist ferner einen kreiszylindrischen Gefäßabschnitt 102 und einen diametral zur Quetschdichtung 101 angeordneten Pumpstängelansatz 103 auf. Innerhalb des Lampengefäßes 100 ist eine Glühwendel 110 gemäß Figur 1 angeordnet. Die abgewinkelten Schenkel 11021, 11031 ihrer beiden Wendelabgänge sind jeweils mit einer gasdicht in der Quetschdichtung 101 eingebetteten Molybdänfolie 123, 124 verbunden. Die Molybdänfolien 123, 124 sind jeweils mit einem aus der Quetschdichtung 101 herausragenden Kontaktstift 125, 126 der Halogenglühlampe verbunden. Der kreiszylindrische Gefäßabschnitt 102 ist auf seiner äußeren Oberfläche mit einer lichtreflektierenden Beschichtung 104 versehen. Die Beschichtung 104 erstreckt sich über 50 Prozent des Umfangs des kreiszylindrischen Gefäßabschnitts 102 und reicht bis zum Pumpstängelansatz 103. Mit anderen Worten ausgedrückt, die Beschichtung 104 bedeckt eine Halbschale des zylindrischen Lampengefäßabschnitts 102 und ist bis zum Pumpstängelansatz 103 fortgesetzt. Die Beschichtung 104 besteht aus einer ersten, unmittelbar auf der Oberfläche des Lampengefäßes aufgebrachten lichtreflektierenden Silberschicht, einer zweiten, darauf aufgebrachten lichtundurchlässigen Chromschicht und einer dritten, auf der Chromschicht angeordneten SiO2-Schutzschicht. Die Glühwendel 110 ist axial ausgerichtet und parallel versetzt gegenüber der Zylinderachse A-A des kreiszylindrischen Gefäßabschnitts 102 angeordnet. Der Außendurchmesser des Lampengefäßes 100 beträgt 9,5 mm und seine Wandstärke 1 mm. Die Achse 1104 der Glühwendel 110, die identisch mit ihrer Wickelachse ist, ist um 2 mm gegenüber der Zylinderachse A-A in Richtung der Beschichtung 104 parallel verschoben. Die beiden abgewinkelten Schenkel 11021 bzw. 11031 der Wendelabgänge der Glühwendel 110 sind mit der Molybdänfolie 123 bzw. 124 verschweißt. Außerdem sind die beiden abgewinkelten Schenkel 11021 und 11031 in einer gemeinsamen Ebene, d.h. in der Ebene der Molybdänfolien 123, 124, die auch die Zylinderachse A-A enthält, angeordnet und verlaufen parallel zueinander. Die Achse, das heißt, die Wickelachse 1104 der Glühwendel 110 ist außerhalb der vorgenannten Ebene, um 2 mm parallel versetzt zur Zylinderachse A-A angeordnet. In der Orientierung der Figur 3 verläuft die Wickelachse 1104 der Glühwendel 110 ungefähr 2 mm unterhalb der durch die abgewinkelten Schenkel 11021 und 11031 definierten Ebene. Die Quetschdichtung 101 ist in einem G4-Sockel (nicht abgebildet) angeordnet.In the in the FIGS. 3 and 4 illustrated embodiment of the light bulb according to the invention is a halogen incandescent lamp with an electrical power consumption of about 20 watts. This lamp has a lamp vessel 100 made of quartz glass, which is closed gas-tight at one end by means of a pinch seal 101. The lamp vessel 100 further has a circular-cylindrical vessel section 102 and a pump stalk extension 103 arranged diametrically to the pinch seal 101. Within the lamp vessel 100 is an incandescent filament 110 according to FIG. 1 arranged. The angled limbs 11021, 11031 of their two spiral outlets are each connected to a molybdenum foil 123, 124 embedded in the pinch seal 101 gas-tight. The molybdenum foils 123, 124 are each connected to a protruding from the pinch seal 101 pin 125, 126 of the halogen incandescent lamp. The circular-cylindrical vessel section 102 is provided with a light-reflecting coating 104 on its outer surface. The coating 104 extends over 50 percent of the circumference of the circular-cylindrical vessel portion 102 and extends to the exhaust nozzle extension 103. In other words, the coating 104 covers a half-shell of the cylindrical lamp vessel portion 102 and is continued up to the exhaust nozzle extension 103. The coating 104 consists of a first light-reflecting silver layer applied directly on the surface of the lamp vessel, a second opaque chromium layer applied thereto and a third SiO 2 protective layer arranged on the chromium layer. The filament 110 is axially aligned and arranged offset parallel to the cylinder axis AA of the circular cylindrical vessel portion 102. The outer diameter of the lamp vessel 100 is 9.5 mm and its wall thickness 1 mm. The axis 1104 of the incandescent filament 110, which is identical to its winding axis, is displaced in parallel by 2 mm relative to the cylinder axis AA in the direction of the coating 104. The two angled legs 11021 and 11031 of the spiral outlets of the incandescent filament 110 are welded to the molybdenum foil 123 or 124. Besides, the two are angled Leg 11021 and 11031 in a common plane, ie in the plane of the molybdenum foils 123, 124, which also contains the cylinder axis AA, arranged and parallel to each other. The axis, that is, the winding axis 1104 of the filament 110 is outside the aforementioned plane, arranged offset by 2 mm parallel to the cylinder axis AA. In the orientation of FIG. 3 The winding axis 1104 of the incandescent filament 110 extends approximately 2 mm below the plane defined by the angled legs 11021 and 11031. The pinch seal 101 is disposed in a G4 socket (not shown).

Die Erfindung beschränkt sich nicht auf die oben näher erläuterten Ausführungsbeispiele der Erfindung. Beispielsweise kann anstelle der oben beschriebenen Beschichtung 104 auch ein sogenannter Kaltlichtspiegel verwendet werden, der für Infrarotstrahlung transparent ist und elektromagnetische Strahlung aus dem sichtbaren Spektralbereich reflektiert. Die beiden abgewinkelten, in einer gemeinsamen Ebene angeordneten L-Schenkel 11021, 11031 müssen nicht unbedingt parallel zueinander verlaufen, sondern ihr Abstand kann beispielsweise in Richtung der Molybdänfolien 123, 124 zunehmen. Ferner kann die Erfindung auch auf Glühlampen und Glühwendeln anderer Leistungsstufen als 20 Watt angewendet werden.The invention is not limited to the above-described embodiments of the invention. For example, instead of the above-described coating 104, it is also possible to use a so-called cold-light mirror, which is transparent to infrared radiation and reflects electromagnetic radiation from the visible spectral range. The two angled L-legs 11021, 11031 arranged in a common plane do not necessarily have to run parallel to one another, but their spacing may increase, for example, in the direction of the molybdenum foils 123, 124. Furthermore, the invention can also be applied to incandescent lamps and filaments of power levels other than 20 watts.

Claims (2)

  1. Incandescent lamp having a transparent, axially symmetrical lamp vessel (100), which is sealed off at one end (101) and is provided with current leadthroughs (123, 124, 125, 126), and an incandescent filament (110) which is arranged within the lamp vessel (100), is aligned axially in the lamp vessel (100) and is arranged with a parallel offset with respect to the lamp vessel axis (A-A), the two outgoing filament sections (1102, 1103) of the incandescent filament (110) each having a bent-back limb (11021, 11031), which are arranged in a common plane which runs with a parallel offset with respect to the winding axis (1104) of the incandescent filament (110) and are each connected to a power supply part (123, 124) embedded in the sealed end (101) of the lamp vessel (100), characterized in that the lamp vessel (100) is provided with a light-reflecting coating (104), which extends over part of the circumference of the lamp vessel (100), the incandescent filament (110) being arranged with a parallel offset with respect to the lamp vessel axis (A-A) in the direction of the light-reflecting coating (104).
  2. Incandescent lamp according to Claim 1, characterized in that the power supply part (123, 124) is in each case a metal foil embedded in a gas-tight manner in the sealed lamp vessel end (101).
EP05748161A 2004-05-12 2005-05-02 Spiral-wound filament for an incandescent lamp and incandescent lamp Expired - Lifetime EP1745501B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004023935A DE102004023935A1 (en) 2004-05-12 2004-05-12 Filament for an incandescent lamp and incandescent lamp
PCT/DE2005/000808 WO2005112075A1 (en) 2004-05-12 2005-05-02 Spiral-wound filament for an incandescent lamp and incandescent lamp

Publications (2)

Publication Number Publication Date
EP1745501A1 EP1745501A1 (en) 2007-01-24
EP1745501B1 true EP1745501B1 (en) 2008-09-10

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EP05748161A Expired - Lifetime EP1745501B1 (en) 2004-05-12 2005-05-02 Spiral-wound filament for an incandescent lamp and incandescent lamp

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US (1) US20080001522A1 (en)
EP (1) EP1745501B1 (en)
JP (1) JP2007536716A (en)
CN (1) CN1954405B (en)
AT (1) ATE408239T1 (en)
CA (1) CA2562854A1 (en)
DE (2) DE102004023935A1 (en)
WO (1) WO2005112075A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008026369A1 (en) 2008-06-02 2009-12-03 Osram Gesellschaft mit beschränkter Haftung Filament lamp for motor vehicle headlight, has glow filament comprising spiral outlet, and connection line extending through axis of current supply and through spiral axis, which lies in region of spiral outlet, of glow filament
CN102089854B (en) * 2008-07-07 2014-06-25 皇家飞利浦电子股份有限公司 Lamp
DE102008054287A1 (en) * 2008-11-03 2010-05-06 Osram Gesellschaft mit beschränkter Haftung Halogen bulb for operation on mains voltage

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048200A (en) * 1958-03-12 1962-08-07 Westinghouse Electric Corp Process of treating coiled articles
NL6404941A (en) * 1964-05-05 1965-11-08
GB1092405A (en) * 1964-10-01 1967-11-22 Gen Telephone And Electronic L Method of making lamp filaments
DE1589151A1 (en) * 1966-12-19 1970-03-19 Egyesuelt Izzolampa Mirrored incandescent lamp with double bulb and halogen gas filling
US3548244A (en) * 1968-07-01 1970-12-15 British Lighting Ind Ltd Lamp having twin filaments and integral filament legs mounted in a bridge
JPS5038975A (en) * 1973-08-14 1975-04-10
NL7602483A (en) * 1976-03-10 1977-09-13 Philips Nv MIRROR CONDENSOR LAMP.
US4227113A (en) * 1978-10-18 1980-10-07 Duro-Test Corporation Incandescent electric lamp with partial light transmitting coating
JPS58112241A (en) * 1981-12-25 1983-07-04 株式会社東芝 Method of producing mount
US5187405A (en) * 1991-02-21 1993-02-16 General Electric Company Double filament incandescent lamp
DE4420607A1 (en) * 1994-06-13 1995-12-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric incandescent lamp and filament for incandescent lamps
DE19707245A1 (en) * 1997-02-25 1998-08-27 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Method of making an electric light bulb

Also Published As

Publication number Publication date
DE102004023935A1 (en) 2005-12-08
CN1954405A (en) 2007-04-25
ATE408239T1 (en) 2008-09-15
EP1745501A1 (en) 2007-01-24
DE502005005335D1 (en) 2008-10-23
CA2562854A1 (en) 2005-11-24
WO2005112075A1 (en) 2005-11-24
US20080001522A1 (en) 2008-01-03
CN1954405B (en) 2010-05-05
JP2007536716A (en) 2007-12-13

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