EP0742610B1 - Double-based electric lamp having preferable operation position and associated socket holder - Google Patents

Double-based electric lamp having preferable operation position and associated socket holder Download PDF

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Publication number
EP0742610B1
EP0742610B1 EP96106461A EP96106461A EP0742610B1 EP 0742610 B1 EP0742610 B1 EP 0742610B1 EP 96106461 A EP96106461 A EP 96106461A EP 96106461 A EP96106461 A EP 96106461A EP 0742610 B1 EP0742610 B1 EP 0742610B1
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EP
European Patent Office
Prior art keywords
lamp
capped
holder
lamp bulb
longitudinal axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96106461A
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German (de)
French (fr)
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EP0742610A2 (en
EP0742610A3 (en
Inventor
Wolfgang Greiler
Michael Pleuser
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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Publication of EP0742610A2 publication Critical patent/EP0742610A2/en
Publication of EP0742610A3 publication Critical patent/EP0742610A3/en
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Publication of EP0742610B1 publication Critical patent/EP0742610B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/02—Single-pole devices, e.g. holder for supporting one end of a tubular incandescent or neon lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling

Definitions

  • the invention relates to a double-ended electric lamp with a preferred Operating situation and a socket for such a lamp according to the preamble of Claims 1 or 5.
  • a combination of a bilateral corresponding to the preamble of claim 1 socketed electric lamp and a socket for such a lamp for double-ended high-pressure discharge lamps in the photo-optics sector are used, and common for their versions. They have been around for a long time Time available in stores.
  • These sockets are usually in a projection device or integrated a reflector lamp, and the aforementioned double-sided High-pressure discharge lamps have a lamp bulb with two pedestals Ends that extend diametrically along the longitudinal axis of the lamp envelope.
  • the lamp bulb ends are essentially, especially in the base area rotationally symmetrical with respect to the longitudinal axis of the lamp bulb, while the lamp itself is not rotationally symmetrical and a well-defined one preferred operating position.
  • the preamble of the claim 5 corresponding lamp is for example in the German patent application DE 29 17 745 or in the published patent application EP 0 477 668 A1.
  • the rotational symmetry of the lamp with respect to the longitudinal axis of the lamp bulb is destroyed, for example, by a pump stem attachment that is centered on the lamp bulb wall is arranged.
  • a pump stem attachment that is centered on the lamp bulb wall is arranged.
  • the user When installing the lamp in a projector or a reflector lamp, the user must make sure that the pump stem attachment does not affect the optical imaging. To do this, it must be in the version inserted lamp in a certain position, their preferred operating position, rotated be, so that the pump stem approach to one for optical imaging is not used location.
  • a serious disadvantage of the previously common two-sided socketed electric lamps with preferred operating position and their associated Versions are that they are not equipped with a positioning aid are guaranteed that the lamp only in the preferred operating position can be installed.
  • the rotationally symmetrical structure in the base area of the Lamp bulb ends, in particular the base sleeves on the lamp bulb ends, as well as the matching versions allow almost any Installation position of the lamp, so that the user with the aforementioned lamps and Versions only with the help of an instruction manual about the professional installation inform and pay attention to the correct position of the pump stem attachment. If the user does not exercise sufficient care, this will result in cheap Case only for poor optical imaging and in the worst case even destroying the lamp.
  • the published patent application DE 29 17 745 describes one with an orientation aid provided gas discharge lamp.
  • the orientation guide ensures that the lamp can only be used in an orientated version.
  • the lamp bulb ends have a lamp and a holder for such a lamp a stop surface arranged perpendicular to the lamp's longitudinal axis, with steps are provided, the rotational symmetry of the lamp bulb ends in the base area cancel, while the socket contacts belonging to the socket, the clamping lie against the stop surfaces, with web-shaped ones that are matched to the steps Projections are equipped.
  • the steps in the stop surface and the web-shaped Projections on the socket contacts form a positioning aid for the lamp. They ensure that the lamp is only inserted in the correct position in the socket can be.
  • the steps are advantageously milled to a shallow depth in the stop surface or in the base of the base sleeve. These cutouts are easy to install and do not change the diameter of the lamp bulb ends in the mounting area of the lamp the length of the lamp, the means the distance between the stop surfaces, so that the lamp with the invention Socket can also be installed in devices that are still compatible with conventional ones Lamp holders without positioning aid are equipped.
  • the positioning aids are such on the stop surfaces and on the socket contacts attached that the lamp bulb ends and the socket contacts with respect of the lamp center are arranged point-symmetrically, that is, with a 180 ° rotation of the lamp and the socket around a suitable axis of rotation, which is arranged perpendicular to the longitudinal axis and the middle between the socket contacts or runs centrally between the lamp bulb ends, the first with the second capped lamp bulb end and the first with the second pressure spring to be brought to cover.
  • This arrangement of the positioning aids Advantage that the two capped lamp bulb ends when installing the lamp in the version is equivalent, that is, interchangeable. Finally, must for lamps that are supplied with alternating current, not pay attention to the polarity of the electrical connections.
  • This arrangement of the positioning aids is advantageous in the case of alternating current operated lamps, the lamp bulb ends directly, without use of connecting cables between the lamp and the socket, as electrical connections are formed. On the other hand, it prevents Above arrangement of positioning aids, for example, that the Lamp with the top facing down is inserted into the socket.
  • the stop surface and the positioning aids on it are advantageously part of the applied to the lamp bulb ends metallic base sleeves.
  • the socket sleeves and the socket contacts serve not only to hold the lamp, but also to electrical connection of the double-ended electric lamp.
  • FIG. 1 shows a high-pressure discharge lamp 1 with a base on both sides with a socket according to a preferred embodiment of the invention pictured.
  • the lamp is in particular a AC powered metal halide high pressure discharge lamp with an electrical power consumption of approx. 575 W.
  • Socket contacts 2a, 2b of the socket are, for example, in a video projector or integrated into an overhead projector.
  • the lamp 1 has a lamp bulb 3 made of quartz glass with two diametrically arranged on both sides of the discharge space 3c, sealed gas-tight Ends 3a, 3b, which extend along the longitudinal axis A-A of the lamp 1 extend.
  • the lamp bulb 3 is identical to the discharge vessel here the lamp 1.
  • the lamp bulb ends or discharge vessel ends 3a, 3b are piston shafts with gas-tight molybdenum sealing foils executed.
  • the molybdenum sealing foils are used for power supply the lamp electrodes protruding into the discharge space 3c, between which there is a gas discharge during lamp operation trains.
  • the piston shafts 3a, 3b each carry at their free ends a metallic base sleeve 4a, 4b, which with the or the molybdenum sealing films of the corresponding piston skirt electrically connected is.
  • the lamp bulb 3 is rotationally symmetrical in the area of the bulb shafts 3a, 3b with respect to the lamp longitudinal axis A-A.
  • Discharge space 3c becomes the rotational symmetry of the lamp bulb 3 through a pump stem attachment 5, which is from a melted pump stem stems from, destroyed.
  • the high-pressure discharge lamp 1 becomes horizontal Location, that is operated with a horizontally running discharge path. During lamp operation, the lamp bulb 3 must be such be aligned so that the pump stem attachment 5 points upwards.
  • the metallic in essentially rotationally symmetrical with respect to the lamp longitudinal axis A-A executed socket sleeves 4a, 4b on the free ends of the piston shafts 3a, 3ab, and the socket contacts 2a, 2b of the lamp holder coordinated positioning aids.
  • the metallic Base sleeves 4a, 4b have two adjacent sections 6a, 7a and 6b, 7b of different diameters.
  • the two tubular ones Sections 6a, 6b and 7a, 7b of each base sleeve 4a, 4b form a perpendicular annular disk-shaped arranged to the lamp longitudinal axis A-A Stop surface 8a or 8b.
  • the first tubular section 6a or 6b of the Base sleeve 4a or 4b has a larger diameter than its second tubular section 7a or 7b.
  • the free end of the piston skirt 3a or 3b is fixed in the first section 6a or 6b of the base sleeve 4a or 4b.
  • the stop faces 8a, 8b of the base sleeves 4a, 4b are each approximately 1.5 mm deep Milled 10a, 10b provided.
  • These cutouts 10a, 10b each define a step in the stop surfaces 8a, 8b with a straight, vertical to the edge of the lamp longitudinal axis A-A.
  • the depth of these cutouts 10a, 10b is less than the wall thickness of the base sleeves 4a, 4b in the area of the stop surfaces 8a, 8b.
  • Both base sleeves 4a, 4b are identical shaped.
  • the socket contacts 2a, 2b are also shaped identically. They exist made of metal and have essentially the shape of an angle.
  • the socket contacts 2a, 2b have a contact surface 11a and 11b and a bent at right angles from the lower edge of the contact surface 11a or 11b Base 12a or 12b. At the upper edge of the contact surface 12a or A slope 13a or 13b is formed on 12b.
  • In the area of the contact surfaces 12a, 12b each have socket contacts 2a, 2b a slot-like Breakthrough 14a, 14b, which extends into the slope 13a or 13b.
  • the socket contacts 2a, 2b each have a web-shaped projection 15a or 15b, which in addition to the slot-like opening 14a or 14b protrudes from the contact surface 11a or 11b and parallel to the Breakthrough 14a or 14b runs.
  • the width of the slot-like openings 14a, 14b is based on the diameter of the second tubular sections 7a, 7b of the base sleeves 4a, 4b matched.
  • the socket contacts 2a, 2b serve also for the electrical power supply of the lamp 1.
  • the electrical contact is over the contact surfaces 11a, 11b of the socket contacts 2a, 2b and the stop surfaces 8a, 8b of the base sleeves 4a, 4b.
  • the base sleeves 4a, 4b serve here directly, without using feed lines or Connection cables between lamp and socket, as electrical connections the lamp 1.
  • the second sections engage 7a, 7b of the base sleeves 4a, 4b into the openings 14a, 14b of the socket contacts 2a, 2b, so that the contact surfaces 11a, 11b of the socket contacts 2a, 2b abut against the stop surfaces 8a, 8b of the base sleeves 4a, 4b.
  • the millings 10a, 10b and the web-shaped projections 15a, 15b ensure in combination with the as a receptacle for the base of the lamp bulb 7a, 7b serving openings 14a, 14b that the lamp 1 only with Pump stem attachment 5 pointing upwards into the socket contacts 2a, 2b the lamp holder can be used.
  • the pump stem approach shows 5 when installing the lamp 1 down, for example, prevent the web-shaped Projections 15a, 15b that the base sleeve sections 7a, 7b in the Recordings 14a, 14b of the socket contacts 2a, 2b can be inserted.
  • the capped lamp bulb ends 3a, 3b and the socket contacts 2a, 2b with the positioning aids 10a, 10b, 15a, 15b are point symmetrical with respect the center of the lamp, the center of the lamp between the lamp bulb ends 3a, 3b or in the middle between the socket contacts 2a, 2b lies on the lamp longitudinal axis A-A.
  • the point symmetry described above causes both Lamp bulb ends 3a, 3b are completely equivalent.
  • the lamp 1 can be so oriented during installation that the lamp bulb end 4a either in the receptacle 14a of the pressure spring 2a or in the receptacle 14b engages the pressure spring 2b.
  • the positioning aids 10a, 10b, 15a, 15b ensure that the lamp 1 only with the upward pointing Pump stem approach 5 can be used in the socket.
  • the Positioning aids 10a, 10b, 15a, 15b according to the invention neither the distance of the stop surfaces 8a, 8b from each other the diameter of the Base sleeves 4a, 4b in the mounting area of the lamp 1 - this is the second tubular section 7a, 7b of the base sleeves 4a, 4b, which in the receptacle 14a, 14b of the socket contacts 2a, 2b engages - can change, the invention Lamp 1 can also be installed in optical devices that still are equipped with the conventional lamp holders.
  • the lamp can also be a high-pressure discharge lamp with a double-ended base, which is the Discharge vessel of the lamp encloses.
  • the lamp bulb identical to the outer bulb.
  • the pump stem approach also a different orientation than in the preferred embodiment exhibit.
  • the preferred operating position of the lamp does not have to be must be defined by a pump stem approach.
  • a sickle-like discharge vessel curved upwards can also be the preferred operating position the lamp.
  • the preferred operating position of the lamp can but also essentially by the non-coaxial arrangement of one rod-shaped discharge vessel determined within the outer bulb become.
  • the lamp can also be an incandescent lamp with a festoon-like Be the lamp bulb, the one on the lamp bulb has the translucency irregularity of the lamp bulb, such as Example has a pump stem approach.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Connecting Device With Holders (AREA)

Description

Die Erfindung betrifft eine zweiseitig gesockelte elektrische Lampe mit bevorzugter Betriebslage und eine Fassung für eine derartige Lampe gemäß dem Oberbegriff der Patentansprüche 1 oder 5.The invention relates to a double-ended electric lamp with a preferred Operating situation and a socket for such a lamp according to the preamble of Claims 1 or 5.

Eine dem Oberbegriff des Patentanspruchs 1 entsprechende Kombination einer zweiseitig gesockelten elektrische Lampe und einer Fassung für eine derartige Lampe ist für zweiseitig gesockelte Hochdruckentladungslampen, die im Foto-Optik-Bereich verwendet werden, und für deren Fassungen gebräuchlich. Sie sind bereits seit langer Zeit im Handel erhältlich. Diese Fassungen sind üblicherweise in einen Projektions-apparat oder eine Reflektorleuchte integriert, und die vorgenannten zweiseitig gesokkelten Hochdruckentladungslampen besitzen einen Lampenkolben mit zwei gesokkelten Enden, die sich diametral entlang der Längsachse des Lampenkolbens erstrekken. Die Lampenkolbenenden sind, insbesondere im Sockelbereich, im wesentlichen rotationssymmetrisch bezüglich der Längsachse des Lampenkolbens ausgebildet, während die Lampe selbst nicht rotationssymmetrisch ist und eine wohldefinierte bevorzugte Betrieblage besitzt. Eine derartige, dem Oberbegriff des Patentanspruchs 5 entsprechende Lampe ist beispielsweise in der deutschen Offenlegungsschrift DE 29 17 745 oder in der Offenlegungsschrift EP 0 477 668 A1 offenbart.A combination of a bilateral corresponding to the preamble of claim 1 socketed electric lamp and a socket for such a lamp for double-ended high-pressure discharge lamps in the photo-optics sector are used, and common for their versions. They have been around for a long time Time available in stores. These sockets are usually in a projection device or integrated a reflector lamp, and the aforementioned double-sided High-pressure discharge lamps have a lamp bulb with two pedestals Ends that extend diametrically along the longitudinal axis of the lamp envelope. The lamp bulb ends are essentially, especially in the base area rotationally symmetrical with respect to the longitudinal axis of the lamp bulb, while the lamp itself is not rotationally symmetrical and a well-defined one preferred operating position. Such, the preamble of the claim 5 corresponding lamp is for example in the German patent application DE 29 17 745 or in the published patent application EP 0 477 668 A1.

Die Rotationssymmetrie der Lampe bezüglich der Längsachse des Lampenkolbens wird beispielsweise durch einen Pumpstengelansatz zerstört, der mittig auf der Lampenkolbenwandung angeordnet ist. Beim Einbau der Lampe in einen Projektionsapparat oder eine Reflektorleuchte muß der Benutzer darauf achten, daß der Pumpstengelansatz nicht die optische Abbildung beeinträchtigt. Dazu muß die in die Fassung eingesetzte Lampe in eine bestimmte Lage, ihre bevorzugte Betriebslage, gedreht werden, so daß sich der Pumpstengelansatz an einer für die optische Abbildung nicht genutzten Stelle befindet. Ein gravierender Nachteil der bisher üblichen zweiseitig gesockelten elektrischen Lampen mit bevorzugter Betriebslage und ihrer zugehörigen Fassungen besteht darin, daß sie nicht mit einer Positionierungshilfe ausgestattet sind, die gewährleistet, daß die Lampe ausschließlich in der bevorzugten Betriebslage eingebaut werden kann. Der rotationssymmetrische Aufbau im Sockelbereich der Lampenkolbenenden, insbesondere der Sockelhülsen an den Lampenkolbenenden, sowie der darauf abgestimmten Fassungen erlaubt vielmehr eine nahezu beliebige Einbaulage der Lampe, so daß der Benutzer sich bei den vorgenannten Lampen und Fassungen erst mit Hilfe einer Bedienungsanleitung über den fachgerechten Einbau informieren und selbst auf die richtige Lage des Pumpstengelansatzes achten muß. Läßt der Benutzer hierbei keine ausreichende Sorgfalt walten, so führt das im günstigen Fall nur zu einer schlechten optischen Abbildung und im ungünstigen Fall aber sogar zu einer Zerstörung der Lampe.The rotational symmetry of the lamp with respect to the longitudinal axis of the lamp bulb is destroyed, for example, by a pump stem attachment that is centered on the lamp bulb wall is arranged. When installing the lamp in a projector or a reflector lamp, the user must make sure that the pump stem attachment does not affect the optical imaging. To do this, it must be in the version inserted lamp in a certain position, their preferred operating position, rotated be, so that the pump stem approach to one for optical imaging is not used location. A serious disadvantage of the previously common two-sided socketed electric lamps with preferred operating position and their associated Versions are that they are not equipped with a positioning aid are guaranteed that the lamp only in the preferred operating position can be installed. The rotationally symmetrical structure in the base area of the Lamp bulb ends, in particular the base sleeves on the lamp bulb ends, as well as the matching versions allow almost any Installation position of the lamp, so that the user with the aforementioned lamps and Versions only with the help of an instruction manual about the professional installation inform and pay attention to the correct position of the pump stem attachment. If the user does not exercise sufficient care, this will result in cheap Case only for poor optical imaging and in the worst case even destroying the lamp.

Die Offenlegungsschrift DE 29 17 745 beschreibt eine mit einer Orientierungshilfe versehene Gasentladungslampe. Die Orientierungshilfe gewährleistet, daß die Lampe nur orientiert in eine Fassung einsetzbar ist.The published patent application DE 29 17 745 describes one with an orientation aid provided gas discharge lamp. The orientation guide ensures that the lamp can only be used in an orientated version.

Es ist die Aufgabe der Erfindung, eine zweiseitig gesockelte elektrische Lampe mit bevorzugter Betriebslage und eine Fassung für eine derartige Lampe bereitzustellen, die eine im Vergleich zum Stand der Technik einfach anzubringende Positionierungshilfe besitzen und die gewährleistet, daß einerseits die mit dem Sockel beziehungsweise mit der Sockelhülse versehene Lampe nur nach korrekter Ausrichtung, das heißt in der bevorzugten Betriebslage, in das mit der Fassung ausgerüstete optische Gerät eingesetzt werden kann, und andererseits diese Lampe aber auch in optische Geräte eingebaut werden kann, die noch mit den bisher gebräuchlichen Lampenfassungen ausgerüstet sind.It is the object of the invention to have a double-ended electric lamp to provide a preferred operating position and a socket for such a lamp, the one positioning aid that is easy to install compared to the prior art own and which ensures that on the one hand with the base or lamp provided with the base sleeve only after correct alignment, that is, in the preferred operating position, in the optical equipped with the socket Device can be used, and on the other hand this lamp but also in optical Devices can be installed that still with the lamp sockets previously used are equipped.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 bzw. des Patentanspruchs 5 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den abhängigen Ansprüchen beschrieben.This object is achieved by the characterizing features of Claim 1 and claim 5 solved. Particularly advantageous designs the invention are described in the dependent claims.

Bei der erfindungsgemäßen Kombination einer zweiseitig gesockelten elektrischen Lampe und einer Fassung für eine derartige Lampe besitzen die Lampenkolbenenden eine senkrecht zur Lampenlängsachse angeordnete Anschlagfläche, die mit Stufen versehen sind, die die Rotationssymmetrie der Lampenkolbenenden im Sockelbereich aufheben, während die zur Fassung gehörenden Fassungskontakte, die klemmend an den Anschlagflächen anliegen, mit auf die Stufen abgestimmten stegförmigen Vorsprüngen ausgestattet sind. Die Stufen in der Anschlagfläche und die stegförmigen Vorsprünge an den Fassungskontakten bilden eine Positionierungshilfe für die Lampe. Sie gewährleisten, daß die Lampe nur lagerichtig in die Fassung eingesetzt werden kann. Beim Einsetzen der Lampenkolbenenden in die dafür vorgesehene Aufnahme der Fassungskontakte wirken die Stufen in der Anschlagfläche und die stegförmigen Vorsprünge an den Fassungskontakten als Führungselemente.In the case of the combination according to the invention of a double-ended electrical The lamp bulb ends have a lamp and a holder for such a lamp a stop surface arranged perpendicular to the lamp's longitudinal axis, with steps are provided, the rotational symmetry of the lamp bulb ends in the base area cancel, while the socket contacts belonging to the socket, the clamping lie against the stop surfaces, with web-shaped ones that are matched to the steps Projections are equipped. The steps in the stop surface and the web-shaped Projections on the socket contacts form a positioning aid for the lamp. They ensure that the lamp is only inserted in the correct position in the socket can be. When inserting the lamp bulb ends into the designated one The steps in the stop surface and the effect of the socket contacts Web-shaped projections on the socket contacts as guide elements.

Bei den Stufen handelt es sich vorteilhafterweise um Ausfräsungen von geringer Tiefe in der Anschlagfläche bzw. im Boden der Sockelhülse. Diese Ausfräsungen sind auf einfache Weise anzubringen und verändern weder den Durchmesser der Lampenkolbenenden im Halterungsbereich der Lampe noch die Länge der Lampe, das heißt, den Abstand der Anschlagflächen, so daß die Lampe mit dem erfindungsgemäßen Sockel auch in Geräte eingebaut werden kann, die noch mit den herkömmlichen Lampenfassungen ohne Positionierungshilfe, ausgestattet sind.The steps are advantageously milled to a shallow depth in the stop surface or in the base of the base sleeve. These cutouts are easy to install and do not change the diameter of the lamp bulb ends in the mounting area of the lamp the length of the lamp, the means the distance between the stop surfaces, so that the lamp with the invention Socket can also be installed in devices that are still compatible with conventional ones Lamp holders without positioning aid are equipped.

Die Positionierungshilfen sind derart auf den Anschlagflächen und an den Fassungskontakten angebracht, daß die Lampenkolbenenden und die Fassungskontakte bezüglich des Lampenmittelpunktes punktsymmetrisch angeordnet sind, das heißt, daß bei einer 180°-Drehung der Lampe und der Fassung um eine geeignete Drehachse, die senkrecht zur Längsachse angeordnet ist und die mittig zwischen den Fassungskontakten bzw. mittig zwischen den Lampenkolbenenden verläuft, das erste mit dem zweiten gesockelten Lampenkolbenende und die erste mit der zweiten Andruckfeder zur Deckung gebracht werden. Diese Anordnung der Positionierungshilfen hat den Vorteil, daß die beiden gesockelten Lampenkolbenenden beim Einbau der Lampe in die Fassung gleichwertig, das heißt, miteinander vertauschbar sind. Schließlich muß bei Lampen, die mit Wechselstrom gespeist werden, nicht auf die Polung der elektrischen Anschlüsse geachtet werden. Besonders vorteilhaft ist diese Anordnung der Positionierungshilfen bei mit Wechselstrom betriebenen Lampen, deren Lampenkolbenenden direkt, ohne Verwendung von Anschlußkabeln zwischen der Lampe und der Fassung, als elektrische Anschlüsse ausgebildet sind. Andererseits verhindert aber die obengenannte Anordnung der Positionierungshilfen beispielsweise, daß die Lampe mit nach unten weisender Oberseite in die Fassung eingesetzt wird.The positioning aids are such on the stop surfaces and on the socket contacts attached that the lamp bulb ends and the socket contacts with respect of the lamp center are arranged point-symmetrically, that is, with a 180 ° rotation of the lamp and the socket around a suitable axis of rotation, which is arranged perpendicular to the longitudinal axis and the middle between the socket contacts or runs centrally between the lamp bulb ends, the first with the second capped lamp bulb end and the first with the second pressure spring to be brought to cover. This arrangement of the positioning aids Advantage that the two capped lamp bulb ends when installing the lamp in the version is equivalent, that is, interchangeable. Finally, must for lamps that are supplied with alternating current, not pay attention to the polarity of the electrical connections. Especially This arrangement of the positioning aids is advantageous in the case of alternating current operated lamps, the lamp bulb ends directly, without use of connecting cables between the lamp and the socket, as electrical connections are formed. On the other hand, it prevents Above arrangement of positioning aids, for example, that the Lamp with the top facing down is inserted into the socket.

Die Anschlagfläche und die darauf befindlichen Positionierungshilfen sind vorteilhafterweise Bestandteil der auf die Lampenkolbenenden aufgebrachten metallischen Sockelhülsen. Die Sockelhülsen und die Fassungskontakte dienen nicht nur zur Halterung der Lampe, sondern außerdem auch zum elektrischen Anschluß der zweiseitig gesockelten elektrischen Lampe.The stop surface and the positioning aids on it are advantageously part of the applied to the lamp bulb ends metallic base sleeves. The socket sleeves and the socket contacts serve not only to hold the lamp, but also to electrical connection of the double-ended electric lamp.

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

Figur 1
eine Seitenansicht (schematisch) einer erfindungsgemäßen zweiseitig gesockelten elektrischen Lampe einschließlich Fassung gemäß eines bevorzugten Ausführungsbeispiels
Figur 2
eine Oberansicht (schematisch) einer erfindungsgemäßen zweiseitig gesockelten elektrischen Lampe einschließlich Fassung gemäß des bevorzugten Ausführungsbeispiels in teilweise geschnittener Darstellung
Figur 3
eine Seitenansicht (schematisch) einer Sockelhülse der Lampe gemäß des bevorzugten Ausführungsbeispiels
Figur 4
eine Draufsicht (schematisch) auf die mit der Positionierungshilfe versehene Anschlagfläche der Sockelhülse gemäß Figur 3
Figur 5
eine Draufsicht (schematisch) auf die mit der Positionierungshilfe versehene Auflage- bzw. Kontaktfläche der Andruckfeder der Lampenfassung gemäß des Ausführungsbeispiels aus Figur 1
The invention is explained in more detail below on the basis of a preferred exemplary embodiment. Show it:
Figure 1
a side view (schematic) of an inventive double-ended electric lamp including socket according to a preferred embodiment
Figure 2
a top view (schematic) of a double-ended electric lamp according to the invention including the holder according to the preferred embodiment in a partially sectioned representation
Figure 3
a side view (schematic) of a base sleeve of the lamp according to the preferred embodiment
Figure 4
3 shows a plan view (schematically) of the stop surface of the base sleeve according to FIG
Figure 5
a plan view (schematic) of the support or contact surface of the pressure spring of the lamp socket provided with the positioning aid according to the exemplary embodiment from FIG. 1

In der Figur 1 ist eine zweiseitig gesockelte Hochdruckentladungslampe 1 mit einer Fassung gemäß eines bevorzugten Ausführungsbeispiels der Erfindung abgebildet. Bei der Lampe handelt es sich insbesondere um eine mit Wechselstrom gespeiste Metallhalogenidhochdruckentladungslampe mit einer elektrischen Leistungsaufnahme von ca. 575 W. Die ebenfalls abgebildeten Fassungskontakte 2a, 2b der Fassung sind beispielsweise in einen Videoprojektor oder in einen Overheadprojektor integriert. Die Lampe 1 besitzt einen aus Quarzglas bestehenden Lampenkolben 3 mit zwei diametral zu beiden Seiten des Entladungsraumes 3c angeordneten, gasdicht verschlossenen Enden 3a, 3b, die sich entlang der Längsachse A-A der Lampe 1 erstrecken. Der Lampenkolben 3 ist hier identisch mit dem Entladungsgefäß der Lampe 1. Die Lampenkolbenenden bzw. Entladungsgefäßenden 3a, 3b sind als Kolbenschäfte mit darin gasdicht eingeschmolzenen Molybdändichtungsfolien ausgeführt. Die Molybdändichtungsfolien dienen zur Spannungsversorgung der in den Entladungsraum 3c hineinragenden Lampenelektroden, zwischen denen sich während des Lampenbetriebes eine Gasentladung ausbildet. Die Kolbenschäfte 3a, 3b tragen an ihren freien Enden jeweils eine metallische Sockelhülse 4a, 4b, die mit der bzw. den Molybdändichtungsfolien des entsprechenden Kolbenschaftes elektrisch leitend verbunden ist. Der Lampenkolben 3 ist im Bereich der Kolbenschäfte 3a, 3b rotationssymmetrisch bezüglich der Lampenlängsachse A-A. Im Bereich des Entladungsraumes 3c wird die Rotationssymmetrie des Lampenkolbens 3 durch einen Pumpstengelansatz 5, der von einem abgeschmolzenen Pumpstengel herrührt, zerstört. Die Hochdruckentladungslampe 1 wird in horizontaler Lage, das heißt mit horizontal verlaufender Entladungsstrecke betrieben. Während des Lampenbetriebes muß der Lampenkolben 3 derart ausgerichtet sein, daß der Pumpstengelansatz 5 nach oben weist. Um die richtige Einbaulage der Lampe 1 zu gewährleisten, sind die metallischen, im wesentlichen rotationssymmetrisch bezüglich der Lampenlängsachse A-A ausgeführten Sockelhülsen 4a, 4b, die auf den freien Enden der Kolbenschäfte 3a, 3ab stecken, und die Fassungskontakte 2a, 2b der Lampenfassung mit aufeinander abgestimmten Positionierungshilfen ausgestattet. Die metallischen Sockelhülsen 4a, 4b besitzen zwei aneinander grenzende Abschnitte 6a, 7a bzw. 6b, 7b unterschiedlichen Durchmessers. Die beiden rohrartigen Abschnitte 6a, 6b bzw. 7a, 7b einer jeden Sockelhülse 4a, 4b bilden eine senkrecht zur Lampenlängsachse A-A angeordnete kreisringscheibenförmige Anschlagfläche 8a bzw. 8b. Der erste rohrförmige Abschnitt 6a bzw. 6b der Sockelhülse 4a bzw. 4b besitzt einen größeren Durchmesser als ihr zweiter rohrförmige Abschnitt 7a bzw. 7b. Das freie Ende des Kolbenschaftes 3a bzw. 3b ist im ersten Abschnitt 6a bzw. 6b der Sockelhülse 4a bzw. 4b fixiert. Das offene Ende des zweiten rohrförmigen Abschnittes 7a bzw. 7b wird durch einen metallischen Sockelstift 9a bzw. 9b verschlossen. Die Anschlagflächen 8a, 8b der Sockelhülsen 4a, 4b sind jeweils mit einer ca. 1,5 mm tiefen Ausfräsung 10a, 10b versehen. Diese Ausfräsungen 10a, 10b definieren jeweils eine Stufe in den Anschlagflächen 8a, 8b mit einer geradlinig, senkrecht zur Lampenlängsachse A-A verlaufenden Kante. Die Tiefe dieser Ausfräsungen 10a, 10b ist geringer als die Wandstärke der Sockelhülsen 4a, 4b im Bereich der Anschlagflächen 8a, 8b. Beide Sockelhülsen 4a, 4b sind identisch geformt.FIG. 1 shows a high-pressure discharge lamp 1 with a base on both sides with a socket according to a preferred embodiment of the invention pictured. The lamp is in particular a AC powered metal halide high pressure discharge lamp with an electrical power consumption of approx. 575 W. The also shown Socket contacts 2a, 2b of the socket are, for example, in a video projector or integrated into an overhead projector. The lamp 1 has a lamp bulb 3 made of quartz glass with two diametrically arranged on both sides of the discharge space 3c, sealed gas-tight Ends 3a, 3b, which extend along the longitudinal axis A-A of the lamp 1 extend. The lamp bulb 3 is identical to the discharge vessel here the lamp 1. The lamp bulb ends or discharge vessel ends 3a, 3b are piston shafts with gas-tight molybdenum sealing foils executed. The molybdenum sealing foils are used for power supply the lamp electrodes protruding into the discharge space 3c, between which there is a gas discharge during lamp operation trains. The piston shafts 3a, 3b each carry at their free ends a metallic base sleeve 4a, 4b, which with the or the molybdenum sealing films of the corresponding piston skirt electrically connected is. The lamp bulb 3 is rotationally symmetrical in the area of the bulb shafts 3a, 3b with respect to the lamp longitudinal axis A-A. In the area of Discharge space 3c becomes the rotational symmetry of the lamp bulb 3 through a pump stem attachment 5, which is from a melted pump stem stems from, destroyed. The high-pressure discharge lamp 1 becomes horizontal Location, that is operated with a horizontally running discharge path. During lamp operation, the lamp bulb 3 must be such be aligned so that the pump stem attachment 5 points upwards. To the To ensure correct installation position of the lamp 1, the metallic, in essentially rotationally symmetrical with respect to the lamp longitudinal axis A-A executed socket sleeves 4a, 4b on the free ends of the piston shafts 3a, 3ab, and the socket contacts 2a, 2b of the lamp holder coordinated positioning aids. The metallic Base sleeves 4a, 4b have two adjacent sections 6a, 7a and 6b, 7b of different diameters. The two tubular ones Sections 6a, 6b and 7a, 7b of each base sleeve 4a, 4b form a perpendicular annular disk-shaped arranged to the lamp longitudinal axis A-A Stop surface 8a or 8b. The first tubular section 6a or 6b of the Base sleeve 4a or 4b has a larger diameter than its second tubular section 7a or 7b. The free end of the piston skirt 3a or 3b is fixed in the first section 6a or 6b of the base sleeve 4a or 4b. The open end of the second tubular portion 7a or 7b closed by a metal base pin 9a or 9b. The stop faces 8a, 8b of the base sleeves 4a, 4b are each approximately 1.5 mm deep Milled 10a, 10b provided. These cutouts 10a, 10b each define a step in the stop surfaces 8a, 8b with a straight, vertical to the edge of the lamp longitudinal axis A-A. The depth of these cutouts 10a, 10b is less than the wall thickness of the base sleeves 4a, 4b in the area of the stop surfaces 8a, 8b. Both base sleeves 4a, 4b are identical shaped.

Die Fassungskontakte 2a, 2b sind ebenfalls identisch geformt. Sie bestehen aus Metall und besitzen im wesentlichen die Gestalt eines Winkels. Die Fassungskontakte 2a, 2b weisen eine Kontaktfläche 11a bzw. 11b sowie einen rechtwinklig von der unteren Kante der Kontaktfläche 11a bzw. 11b abgebogenen Fuß 12a bzw. 12b auf. An die obere Kante der Kontaktfläche 12a bzw. 12b ist eine Schräge 13a bzw.13b angeformt. Im Bereich der Kontaktflächen 12a, 12b besitzen die Fassungskontakte 2a, 2b jeweils einen schlitzartigen Durchbruch 14a, 14b, der sich bis in die Schräge 13a bzw. 13b erstreckt. Außerdem weisen die Fassungskontakte 2a, 2b jeweils einen stegförmigen Vorsprung 15a bzw. 15b auf, der neben dem schlitzartigen Durchbruch 14a bzw. 14b aus der Kontaktfläche 11a bzw. 11b emporragt und parallel zu dem Durchbruch 14a bzw. 14b verläuft. Die Breite der schlitzartigen Durchbrüche 14a, 14b ist auf den Durchmesser der zweiten rohrförmigen Abschnitte 7a, 7b der Sockelhülsen 4a, 4b abgestimmt. Die Fassungskontakte 2a, 2b dienen auch zur elektrischen Stromversorgung der Lampe 1. Der elektrische Kontakt wird über die Kontaktflächen 11a, 11b der Fassungskontakte 2a, 2b und die Anschlagflächen 8a, 8b der Sockelhülsen 4a, 4b hergestellt. Die Sockelhülsen 4a, 4b dienen hier direkt, ohne Verwendung von Zuleitungs- oder Anschlußkabeln zwischen Lampe und Fassung, als elektrische Anschlüsse der Lampe 1. The socket contacts 2a, 2b are also shaped identically. They exist made of metal and have essentially the shape of an angle. The socket contacts 2a, 2b have a contact surface 11a and 11b and a bent at right angles from the lower edge of the contact surface 11a or 11b Base 12a or 12b. At the upper edge of the contact surface 12a or A slope 13a or 13b is formed on 12b. In the area of the contact surfaces 12a, 12b each have socket contacts 2a, 2b a slot-like Breakthrough 14a, 14b, which extends into the slope 13a or 13b. Moreover the socket contacts 2a, 2b each have a web-shaped projection 15a or 15b, which in addition to the slot-like opening 14a or 14b protrudes from the contact surface 11a or 11b and parallel to the Breakthrough 14a or 14b runs. The width of the slot-like openings 14a, 14b is based on the diameter of the second tubular sections 7a, 7b of the base sleeves 4a, 4b matched. The socket contacts 2a, 2b serve also for the electrical power supply of the lamp 1. The electrical contact is over the contact surfaces 11a, 11b of the socket contacts 2a, 2b and the stop surfaces 8a, 8b of the base sleeves 4a, 4b. The base sleeves 4a, 4b serve here directly, without using feed lines or Connection cables between lamp and socket, as electrical connections the lamp 1.

Beim Einsetzen der Lampe 1 in die Fassung greifen die zweiten Abschnitte 7a, 7b der Sockelhülsen 4a, 4b in die Durchbrüche 14a, 14b der Fassungskontakte 2a, 2b ein, so daß die Kontaktflächen 11a, 11b der Fassungskontakte 2a, 2b an den Anschlagflächen 8a, 8b der Sockelhülsen 4a, 4b klemmend anliegen. Dabei greifen die stegförmigen Vorsprünge 15a, 15b der Fassungskontakte 2a, 2b in die Ausfräsungen 10a, 10b der Sockelhülsen 4a, 4b. Die Ausfräsungen 10a, 10b und die stegförmigen Vorsprünge 15a, 15b gewährleisten in Kombination mit den als Aufnahme für die gesockelten Lampenkolbenenden 7a, 7b dienenden Durchbrüchen 14a, 14b, daß die Lampe 1 nur mit nach oben weisendem Pumpstengelansatz 5 in die Fassungskontakte 2a, 2b der Lampenfassung eingesetzt werden kann. Zeigt der Pumpstengelansatz 5 beim Einbau der Lampe 1 beispielsweise nach unten, so verhindern die stegförmigen Vorsprünge 15a, 15b, daß die Sockelhülsenabschnitte 7a, 7b in die Aufnahmen 14a, 14b der Fassungskontakte 2a, 2b eingeführt werden können.When the lamp 1 is inserted into the socket, the second sections engage 7a, 7b of the base sleeves 4a, 4b into the openings 14a, 14b of the socket contacts 2a, 2b, so that the contact surfaces 11a, 11b of the socket contacts 2a, 2b abut against the stop surfaces 8a, 8b of the base sleeves 4a, 4b. The web-shaped projections 15a, 15b of the socket contacts grip 2a, 2b into the cutouts 10a, 10b of the base sleeves 4a, 4b. The millings 10a, 10b and the web-shaped projections 15a, 15b ensure in combination with the as a receptacle for the base of the lamp bulb 7a, 7b serving openings 14a, 14b that the lamp 1 only with Pump stem attachment 5 pointing upwards into the socket contacts 2a, 2b the lamp holder can be used. The pump stem approach shows 5 when installing the lamp 1 down, for example, prevent the web-shaped Projections 15a, 15b that the base sleeve sections 7a, 7b in the Recordings 14a, 14b of the socket contacts 2a, 2b can be inserted.

Die gesockelten Lampenkolbenenden 3a, 3b und die Fassungskontakte 2a, 2b mit den Positionierungshilfen 10a, 10b, 15a, 15b sind punktsymmetrisch bezüglich des Lampenmittelpunktes, wobei der Lampenmittelpunkt mittig zwischen den Lampenkolbenenden 3a, 3b bzw. mittig zwischen den Fassungskontakten 2a, 2b auf der Lampenlängsachse A-A liegt. Das heißt, daß die gesockelten Lampenkolbenenden 3a, 3b und die Fassungskontakte 2a, 2b bei einer 180 °-Drehung der Lampe 1 und der Fassung um eine geeignete Drehachse, die senkrecht zur Längsachse und mittig zwischen den Fassungskontakten 2a, 2b verläuft, das erste 4a mit dem zweiten gesockelten Lampenkolbenende 4b und die erste 2a mit der zweiten Andruckfeder 2b und insbesondere die Positionierungshilfe 15a der ersten 2a mit der 15b der zweiten Andruckfeder 2b sowie die Positionierungshilfe 10a des ersten 4a mit der 10b des zweiten Lampenkolbenendes 4b zur Deckung gebracht werden. Insbesondere bewirkt die oben beschriebene Punktsymmetrie, daß beide Lampenkolbenenden 3a, 3b vollkommen gleichwertig sind. Die Lampe 1 kann also beim Einbau so orientiert sein, daß das Lampenkolbenende 4a entweder in die Aufnahme 14a der Andruckfeder 2a oder in die Aufnahme 14b der Andruckfeder 2b eingreift. Die Positionierungshilfen 10a, 10b, 15a, 15b gewährleisten, daß die Lampe 1 ausschließlich mit nach oben weisendem Pumpstengelansatz 5 in die Fassung eingesetzt werden kann. Da die erfindungsgemäßen Positionierungshilfen 10a, 10b, 15a, 15b weder den Abstand der Anschlagsflächen 8a, 8b voneinander noch den Durchmesser der Sockelhülsen 4a, 4b im Halterungsbereich der Lampe 1 ― das ist der zweite rohrförmige Abschnitt 7a, 7b der Sockelhülsen 4a, 4b, der in die Aufnahme 14a, 14b der Fassungskontakte 2a, 2b eingreift ― verändern, kann die erfindungsgemäße Lampe 1 auch in optische Geräte eingebaut werden, die noch mit den herkömmlichen Lampenfassungen ausgestattet sind.The capped lamp bulb ends 3a, 3b and the socket contacts 2a, 2b with the positioning aids 10a, 10b, 15a, 15b are point symmetrical with respect the center of the lamp, the center of the lamp between the lamp bulb ends 3a, 3b or in the middle between the socket contacts 2a, 2b lies on the lamp longitudinal axis A-A. It means that the capped lamp bulb ends 3a, 3b and the socket contacts 2a, 2b with a 180 ° rotation of the lamp 1 and the holder by a suitable one Rotation axis that is perpendicular to the longitudinal axis and centrally between the socket contacts 2a, 2b runs, the first 4a with the second socket Lamp bulb end 4b and the first 2a with the second pressure spring 2b and in particular the positioning aid 15a of the first 2a with the 15b of the second pressure spring 2b and the positioning aid 10a of the first 4a are brought into congruence with the 10b of the second lamp bulb end 4b. In particular, the point symmetry described above causes both Lamp bulb ends 3a, 3b are completely equivalent. The lamp 1 can be so oriented during installation that the lamp bulb end 4a either in the receptacle 14a of the pressure spring 2a or in the receptacle 14b engages the pressure spring 2b. The positioning aids 10a, 10b, 15a, 15b ensure that the lamp 1 only with the upward pointing Pump stem approach 5 can be used in the socket. Since the Positioning aids 10a, 10b, 15a, 15b according to the invention neither the distance of the stop surfaces 8a, 8b from each other the diameter of the Base sleeves 4a, 4b in the mounting area of the lamp 1 - this is the second tubular section 7a, 7b of the base sleeves 4a, 4b, which in the receptacle 14a, 14b of the socket contacts 2a, 2b engages - can change, the invention Lamp 1 can also be installed in optical devices that still are equipped with the conventional lamp holders.

Die Erfindung beschränkt sich nicht auf das oben näher erläuterte Ausführungsbeispiel. Beispielsweise kann die Lampe auch eine Hochdruckentladungslampe mit einem zweiseitig gesockelten Außenkolben sein, der das Entladungsgefäß der Lampe umschließt. In diesem Fall ist der Lampenkolben identisch mit dem Außenkolben. Außerdem kann der Pumpstengelansatz auch eine andere Orientierung als bei dem bevorzugten Ausführungsbeispiel aufweisen. Ferner muß die bevorzugte Betriebslage der Lampe nicht unbedingt durch einen Pumpstengelansatz definiert sein. Ein sichelartig nach oben gekrümmtes Entladungsgefäß kann ebenfalls die bevorzugte Betriebslage der Lampe festlegen. Die bevorzugte Betriebslage der Lampe kann aber auch durch die nicht-koaxiale Anordnung eines im wesentlichen stabförmigen Entladungsgefäßes innerhalb des Außenkolbens bestimmt werden. Ferner kann die Lampe aber auch eine Glühlampe mit einem soffittenartigen Lampenkolben sein, der auf dem Lampenkolben eine die Lichtdurchlässigkeit des Lampenkolbens störende Unregelmäßigkeit, wie zum Beispiel einen Pumpstengelansatz, aufweist.The invention is not limited to the exemplary embodiment explained in more detail above. For example, the lamp can also be a high-pressure discharge lamp with a double-ended base, which is the Discharge vessel of the lamp encloses. In this case, the lamp bulb identical to the outer bulb. In addition, the pump stem approach also a different orientation than in the preferred embodiment exhibit. Furthermore, the preferred operating position of the lamp does not have to be must be defined by a pump stem approach. A sickle-like discharge vessel curved upwards can also be the preferred operating position the lamp. The preferred operating position of the lamp can but also essentially by the non-coaxial arrangement of one rod-shaped discharge vessel determined within the outer bulb become. Furthermore, the lamp can also be an incandescent lamp with a festoon-like Be the lamp bulb, the one on the lamp bulb has the translucency irregularity of the lamp bulb, such as Example has a pump stem approach.

Claims (6)

  1. Electric lamp capped at both ends and having a preferred operating position, and a holder for such a lamp, wherein
    the lamp (1) has a lamp bulb (3) with two capped lamp bulb ends (3a, 3b) extending diametrically along a common axis (A-A), termed the longitudinal axis of the lamp,
    the capped lamp bulb ends (3a, 3b) are provided in each case with an essentially rotationally symmetrical cap shell (4a, 4b), and the cap shells (4a, 4b) in each case have a stop surface (8a, 8b) orientated perpendicular to the longitudinal axis (A-A),
    the holder has two holder contacts (2a, 2b) which are each fitted with a receptacle (14a, 14b) for a capped end (3a, 3b) of the lamp bulb (3),
    the respective receptacle (14a, 14b) is co-ordinated with the diameter of the capped lamp bulb end (3a, 3b) in the retaining region (7a, 7b),
    the holder contacts (2a, 2b) bear against the stop surfaces (8a, 8b) orientated perpendicular to the longitudinal axis (A-A), such that the lamp (1) is held in a clamped fashion between the holder contacts (2a, 2b) in the receptacle (14a, 14b) of the latter,
    characterized in that the two cap shells (4a, 4b) in each case have in their stop surface (8a, 8b) a step (10a, 10b) negating the rotational symmetry of the relevant cap shell (4a, 4b), and the two holder contacts (2a, 2b) of the holder in each case have a web-shaped projection (15a, 15b) co-ordinated with the corresponding step (10a, 10b), the web-shaped projections (15a, 15b) engaging, when the lamp (1) is inserted into the receptacles (14a, 14b) of the holder contacts (2a, 2b), in the corresponding steps (10a, 10b) of the stop surfaces (8a, 8b), and thereby forming a positioning aid for the lamp (1) such that, upon insertion of the lamp bulb ends (3a, 3b) into the receptacles (14a, 14b) of the holder contacts (2a, 2b), the lamp (1) is guided with the aid of the steps (10a, 10b) and the web-shaped projections (15a, 15b).
  2. Electric lamp capped at both ends and a holder according to Claim 1, characterized in that the lamp bulb ends (3a, 3b) and the holder contacts (2a, 2b) exhibit point symmetry, that is to say given a 180° rotation of the lamp and holder about a suitable rotation axis which runs perpendicular to the longitudinal axis (A-A) and centrally between the holder contacts (2a, 2b), the first lamp bulb end (3a) is brought into coincidence with the second capped lamp bulb end (3b), and the first pressure spring (2a) is brought into coincidence with the second pressure spring (2b) and, in particular, the positioning aid (15a) of the first pressure spring (2a) is brought into coincidence with the positioning aid (15b) of the second pressure spring (2b), and the positioning aid (10a) of the first lamp bulb end is brought into coincidence with the positioning aid (10b) of the second lamp bulb end (3b).
  3. Electric lamp capped at both ends and a holder according to Claim 1, characterized in that the steps (10a, 10b) are cut-outs whose thickness is less than the wall thickness of the cap shell (4a, 4b) in the relevant region of the respective stop surface (8a, 8b).
  4. Electric lamp capped at both ends and a holder according to Claim 1, characterized in that the cap shells (4a, 4b) and the holder contacts (2a, 2b) consist of metal.
  5. Electric lamp capped at both ends and having a preferred operating position, wherein
    the lamp (1) has a lamp bulb (3) with two capped ends (3a, 3b) extending diametrically along a common axis (A-A), termed the longitudinal axis of the lamp, and
    the two ends (3a, 3b) of the lamp bulb (3) are provided in each case with a metallic cap shell (4a, 4b) which are of essentially rotationally symmetrical design and in each case have a stop surface (8a, 8b) orientated perpendicular to the longitudinal axis (A-A),
    characterized in that the stop surfaces (8a, 8b) are provided in each case with a step (10a, 10b) in the form of a cut-out, which negate the rotational symmetry of the cap shells (4a, 4b), the steps (10a, 10b) being arranged in such a way that the two cap shells (4a, 4b) are brought into coincidence with their steps (10a, 10b) in the case of a 180° rotation of the lamp (1) about a suitable rotation axis which runs perpendicular to the longitudinal axis (A-A) and centrally between the two cap shells (4a, 4b).
  6. Electric lamp capped at both ends according to Claim 5, characterized in that the lamp (1) is fed with alternating current and the capped lamp bulb ends (3a, 3b) are designed as electric terminals.
EP96106461A 1995-05-12 1996-04-24 Double-based electric lamp having preferable operation position and associated socket holder Expired - Lifetime EP0742610B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19517516A DE19517516A1 (en) 1995-05-12 1995-05-12 Electric lamp with two bases and preferred operating position and socket as well as base and base sleeve for such a lamp
DE19517516 1995-05-12

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EP0742610A2 EP0742610A2 (en) 1996-11-13
EP0742610A3 EP0742610A3 (en) 1997-07-16
EP0742610B1 true EP0742610B1 (en) 2001-09-05

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EP (1) EP0742610B1 (en)
JP (1) JP3542870B2 (en)
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Publication number Publication date
NO961917L (en) 1996-11-13
JP3542870B2 (en) 2004-07-14
EP0742610A2 (en) 1996-11-13
NO319677B1 (en) 2005-09-05
EP0742610A3 (en) 1997-07-16
DK0742610T3 (en) 2001-12-10
US5731656A (en) 1998-03-24
DE59607611D1 (en) 2001-10-11
CA2176399C (en) 2006-08-29
CA2176399A1 (en) 1996-11-13
DE19517516A1 (en) 1996-11-14
NO961917D0 (en) 1996-05-10
JPH08315725A (en) 1996-11-29

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