EP0533250A1 - Gesockelte elektrische Lampe - Google Patents

Gesockelte elektrische Lampe Download PDF

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Publication number
EP0533250A1
EP0533250A1 EP92202752A EP92202752A EP0533250A1 EP 0533250 A1 EP0533250 A1 EP 0533250A1 EP 92202752 A EP92202752 A EP 92202752A EP 92202752 A EP92202752 A EP 92202752A EP 0533250 A1 EP0533250 A1 EP 0533250A1
Authority
EP
European Patent Office
Prior art keywords
electric
lamp
insulator part
insulator
contact
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.)
Ceased
Application number
EP92202752A
Other languages
English (en)
French (fr)
Inventor
Nicasius Gerardus Tielemanius Van Gennip
Winand Hendrik Anna Maria Friederichs
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of EP0533250A1 publication Critical patent/EP0533250A1/de
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap

Definitions

  • the invention relates to a capped electric lamp, comprising: a lamp vessel which is sealed in a vacuumtight manner and in which an electric element is arranged; a lamp cap provided with electric contacts, connected to the lamp vessel, comprising a metal shell part with an inwardly projecting portion, and comprising an insulator part fastened in the shell part in contact with the inwardly projecting portion thereof, which insulator part carries at least one of the electric contacts; current supply conductors extending to the electric element and connected to a respective electric contact(s).
  • Such a lamp is known from inter alia DE GM 89 07 108.
  • the insulator part of the lamp cap is fastened in the shell part in that the inwardly projecting portion thereof, i.e. tags which grip around an end face of the insulator part, cooperates with projections in the shell part which grip into the insulator part at a distance from the end face.
  • a disadvantage of the known lamp is that it is difficult to connect the insulator part immovably to the shell part, especially when the lamp cap assumes a higher temperature, for example, during lamp operation.
  • the movability of the insulator part is a result of the partial spring-back into its original shape in the case in which projections and/or an inwardly projecting portion were made through deformation of the shell part in the presence of the insulator part in order to fix the insulator part. Differences in thermal coefficient of expansion between the metal of the shell part and the material of the insulator part increase this movability further.
  • the movable insulator part involves the risk that mechanical forces are exerted on the current supply conductor connected to the electric contact which is supported by the insulator body. This may lead to fracture of this current supply conductor and to a premature failure of the lamp.
  • the lamp cap of the electric lamp according to the invention is sturdy, simple and reliable.
  • the lamp cap is readily obtained by starting from a metal shell part with an inwardly projecting portion, for example a flanged rim, bent tags, dents, etc.
  • the metal ring is provided and pressed home so as to pre-tension the tongues and cause them to press with clamping fit, after which the ring is fixed.
  • the ring may be fastened to the shell part by means of soldered or welded joints, for example, laser or resistance welds.
  • an open ring This may be easily manufactured from plating, for example, from spring steel, while said ring also readily adapts itself to variations in dimensions of the shell part.
  • Such a ring easily allows itself to be pressed home against the shell part, as a result of which, for example, laser and resistance welds can be readily made.
  • the ring may in addition have bulges in the locations where the connections are to be made for an increased assurance of a defined contact between the ring and the shell part in these locations.
  • the inwardly projecting portion of the shell part is a continuous flanged rim in a favourable embodiment.
  • a rim is strong and visually attractive.
  • the insulator part may be made of synthetic resin, but alternatively of ceramic material.
  • the latter material has the advantage that it does not contain volatile organic components which are capable of polluting an optical system in which the lamp is used.
  • the insulator part has seats into each of which a respective free end portion of a tongue presses with an end face.
  • the tongues find an abutment during pressing home of the ring so that they cannot be shifted over the relevant surface of the insulator part, and pressing home do lead to the tags becoming curved. This results in a high pre-tension and thus in a strong clamping fit against the insulator part.
  • a favourable effect of the seats is that together with the tongues they lock the insulator part in the shell part, if the latter is cylindrical, against relative rotation.
  • the shell part of the lamp cap may be, for example, rectangular, circular, or oval in cross-section.
  • the electric contacts may comprise one or several contact elements supported by the insulator part plus the shell part itself, or consist exclusively of elements supported by the shell part.
  • the electric contacts may be pins, for example, round or flat studs. They may be present at the insulator part during the creation thereof, or they may be fastened to the insulator part after the creation thereof, for example, in that a portion projecting through said part is twisted or flanged.
  • the insulator part comprises a first and a second body, the first body having a cavity from which an electric contact having a longitudinal direction issues from the lamp cap to the exterior in said longitudinal direction.
  • the electric contact in that case has a lateral portion, transverse to the longitudinal direction, which is clamped in by the first and the second body.
  • the electric contact may, for example, have an outwardly projecting collar as the lateral portion.
  • the electric contact may be a metal strip having a bent portion as the lateral portion. It is favourable when the electric contact comprises a tongue which encloses an acute angle with the longitudinal direction, and the second body has a cavity in which said tongue is enclosed with lateral clamping fit against the second body.
  • the electric contact may have several, for example, two such tongues situated at a distance from one another.
  • the tongue(s) provide(s) an additional fixation transverse to the longitudinal direction. It is favourable when the tongue urges the bend between the contact and its bent portion to become cleared from the first body. A flat position of the bent portion between the two bodies is promoted by this.
  • the first body may bevelled near the bend, at the entrance of the cavity.
  • the electric element may be, for example, an incandescent body, possibly in a gas comprising a halogen, or a discharge path in an ionizable gas.
  • the capped electric lamp has a lamp vessel 1 which is sealed in a vacuumtight manner and in which an electric element 2, an incandescent body in the Figure, is arranged.
  • a lamp cap 3 provided with electric contacts 4 is connected to the lamp vessel.
  • the lamp cap has a metal shell part 5 with an inwardly projecting portion 6, a flanged rim in the Figure, and an insulator part 7 fastened in the shell part and in contact with the inwardly projecting portion 6 thereof.
  • the insulator part 7 supports at least one of the electric contacts 4, in the Figure two contacts.
  • a clamping plate 9 forms part of the lamp cap 3. The plate keeps the lamp vessel fixed in an usual manner by means of resilient tags (not visible) and is fastened to the shell part.
  • Current supply conductors 8 extending to the electric element 2 are connected to respective electric contacts 4.
  • a metal ring 10 is present in the lamp cap 3, fastened against the shell part 5. Tongues 11 project from this ring, pressing with their free end portions 12 against the insulator part 7 with clamping fit.
  • the insulator part 7 has seats 13, in the Figure obtained by means of elevations, into which respective free end portions 12 press each with an end face 14 (see also Fig. 1b).
  • the tongues 11 were able to curve so as to obtain a strong pre-tension before fastening the ring 10 in the lamp cap 5. Connections with the shell part were subsequently effected by spot-welding.
  • the insulator part 7 has a first 16 and a second body 17, the first body having a cavity 18 from which an electric contact 4 having a longitudinal direction 19 issues from the lamp cap 3 to the exterior in said longitudinal direction.
  • the electric contact 4 has a lateral portion 20 which is clamped in by the first 16 and the second body 17.
  • the lateral portion in the Figure is a collar at the hollow pin which constitutes the electric contact. Owing to the pressure of the tongues of the metal ring, the two bodies clamp the electric contact in between them, whereby not only a fixed connection between the shell part and the insulator part is achieved, but also between the insulator part and, in the Figure, both electric contacts.
  • the metal ring 10' of Fig. 1b is open owing to a slot 21, so that the ring cannot only be readily inserted into the lamp cap, but will also lie against the shell part with its bulges 15 when pressed home, so that it can be readily connected to this part.
  • the electric contact 34 is a metal strip having a bent portion by way of lateral portion 50.
  • the electric contact 34 comprises a tongue 52 which encloses an acute angle with the longitudinal direction 49.
  • the second body 47 has a cavity 53 in which said tongue 52 is accommodated, with lateral clamping fit against the second body 47.
  • the electric contacts are immovably fixed. Since the second body 47 presses laterally against the tongue 52, the bend between the contact 34 and the lateral portion 50 thereof clears the first body 46.
  • the contact 34 as a result has a flat, well-defined position in the insulator part 37.
  • a funnel 54 in the second body 47 is capable of guiding a current supply conductor towards a contact 34, so that this conductor can be fastened to said contact within the opening 55 in the first body 46.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
EP92202752A 1991-09-17 1992-09-10 Gesockelte elektrische Lampe Ceased EP0533250A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP91202385 1991-09-17
EP91202385 1991-09-17

Publications (1)

Publication Number Publication Date
EP0533250A1 true EP0533250A1 (de) 1993-03-24

Family

ID=8207884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92202752A Ceased EP0533250A1 (de) 1991-09-17 1992-09-10 Gesockelte elektrische Lampe

Country Status (2)

Country Link
EP (1) EP0533250A1 (de)
JP (1) JPH05205707A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0786791A1 (de) * 1996-01-25 1997-07-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe
EP0991096A1 (de) * 1998-09-30 2000-04-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe
WO2005017945A3 (en) * 2003-08-15 2005-07-07 Philips Intellectual Property Vehicle lamp with increased thermal stability
WO2008051378A2 (en) 2006-10-19 2008-05-02 Osram Sylvania Inc. Reversible lamp

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8907108U1 (de) * 1989-06-09 1989-08-10 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8907108U1 (de) * 1989-06-09 1989-08-10 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0786791A1 (de) * 1996-01-25 1997-07-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe
EP0991096A1 (de) * 1998-09-30 2000-04-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe
US6259192B1 (en) 1998-09-30 2001-07-10 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Electric lamp
WO2005017945A3 (en) * 2003-08-15 2005-07-07 Philips Intellectual Property Vehicle lamp with increased thermal stability
WO2008051378A2 (en) 2006-10-19 2008-05-02 Osram Sylvania Inc. Reversible lamp
EP2082410A2 (de) * 2006-10-19 2009-07-29 Osram Sylvania, Inc. Umkehrbare leuchte
EP2082410A4 (de) * 2006-10-19 2013-01-02 Osram Ag Umkehrbare leuchte

Also Published As

Publication number Publication date
JPH05205707A (ja) 1993-08-13

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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