EP0756311A1 - Hélice pour électrode pour des lampes à décharge et procédé de fabrication d'une telle hélice pour électrode - Google Patents

Hélice pour électrode pour des lampes à décharge et procédé de fabrication d'une telle hélice pour électrode Download PDF

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Publication number
EP0756311A1
EP0756311A1 EP96111382A EP96111382A EP0756311A1 EP 0756311 A1 EP0756311 A1 EP 0756311A1 EP 96111382 A EP96111382 A EP 96111382A EP 96111382 A EP96111382 A EP 96111382A EP 0756311 A1 EP0756311 A1 EP 0756311A1
Authority
EP
European Patent Office
Prior art keywords
wire
section
turns
electrode coil
electrode
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.)
Withdrawn
Application number
EP96111382A
Other languages
German (de)
English (en)
Inventor
Roland Hoffmann
Erolf Weinhardt
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
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0756311A1 publication Critical patent/EP0756311A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode

Definitions

  • the invention relates to an electrode filament for discharge lamps according to the preamble of patent claim 1 and a method for producing such an electrode filament according to the preamble of patent claim 7.
  • Such an electrode coil is disclosed, for example, in US Pat. No. 3,729,787.
  • This electrode coil has a coiled tungsten wire, which is loosely wrapped with a braided wire.
  • the wrapping wire is wound around the coiled tungsten wire and around a first core wire arranged parallel to the tungsten wire, and then the unit consisting of coiled tungsten wire, first core wire and wrapping wire is wound around a second core wire.
  • the turns of the electrode coil or of the coiled tungsten wire consistently have an essentially circular cross section.
  • the two core wires are removed from the coil in an acid bath.
  • the US Pat. No. 3,736,458 also describes an electrode coil with a coiled tungsten wire, which is loosely wrapped with a braiding wire.
  • the turns of the electrode coil or of the coiled tungsten wire do not have an essentially circular cross section, as in US Pat. No. 3,729,787, but an oval cross section throughout. This shape is intended to prevent the wire from unwinding.
  • the electrode coil according to the invention has a coiled wire which has both turns with an essentially circular cross section and turns with an oval cross section.
  • the winding wire is reliably fixed against unrolling by the coil sections in which the turns have an oval cross section, so that fusing of the coil ends is unnecessary.
  • only two core wires are required to produce the electrode coil according to the invention. This enables cost-effective helical production.
  • the coil sections, in which the turns of the coiled wire have an oval cross section are advantageously located at the coil ends, since here the risk of the wrapping wire unrolling is greatest. In the case of long helices, it is advantageous to provide further helix sections outside of the helix ends, which have turns with an oval cross section.
  • spiral sections are preferably arranged regularly or equidistantly along the spiral.
  • the spiral sections are advantageously produced with the aid of a second core wire, which is flattened at regular intervals.
  • the unit consisting of the helix wire, the first core wire arranged parallel to it and the wrapping wire is wound around this second core wire.
  • turns with an oval cross section are formed in the flattened sections of the second core wire, while turns with a substantially circular cross section are formed in the non-flattened regions of the core wire.
  • the initially uncoiled tungsten wire 1 is aligned parallel to a first core wire 3 made of iron. Then the tungsten wire 1 and the core wire 3 are wrapped with the wrapping wire 2. From the schematic FIG. 4 it can be seen that the first core wire 3 has a slightly smaller wire thickness than the helical wire 1.
  • the unit consisting of the coiled tungsten wire 1, the first core wire 3 and the wrapping wire 2 is in turn a second, also made of iron existing core wire 4, which has a diameter of about 1 mm, wound.
  • the second core wire 4 is flattened at equidistant intervals of approx. 10 mm, which means that its dimension in the squeezing direction is reduced to approx. 80% of the diameter.
  • FIG. 4 shows a partial side view of a non-flattened section of the second core wire of the electrode coil with the helical wire 1, the first core wire 3 and the wrapping wire 2.
  • FIG. 5 a cross section through this helical section shown in FIG. 4 is shown.
  • the turns of the coiled tungsten wire 1 with the surrounding wire 2 have a substantially circular cross section in this coil section. After the two core wires 3, 4 have been etched out, this helical section corresponds to the helical section II shown in FIG. 2 or in FIG. 1.
  • FIG. 6 shows a cross section through a flattened section of the second core wire 4 with the coiled wire 1 wound around it, which in turn is wrapped in the wrapping wire 2.
  • the turns of the coiled tungsten wire 1 with the surrounding wire 2 have an oval cross section in this coil section.
  • the wires 1, 2, 3, 4 are severed in the middle of the flattened sections of the core wire 4. This creates electrode coils with flattened coil ends. Finally, the two core wires 3, 4 are detached in an acid bath. As a result, about 0.5 mm long coil sections I, III (FIGS. 1, 3) remain at the coil ends, the windings of which have an oval cross section, while the central coil section II has windings with an approximately circular cross section.
  • the electrode coils are then mounted in an electrode frame in a known manner and immersed in an emitter paste. The further assembly of the electrode frames is carried out in a known manner and will therefore not be described further here.
  • the electrode filaments according to the invention can also have additional filament sections with an oval cross section outside the filament ends.
  • This version is particularly advantageous for comparatively long rod helices.
  • the distance between the flattened sections of the second core wire 4 can be shortened, for example, to approximately 4.5 mm.
  • the electrode coil according to the invention explained in more detail above contains exactly one additional coil section arranged in the coil center, in which the coil wire has turns with an oval cross section, the length of which is approximately 1 mm.
  • An approximately 4.5 mm long spiral section then extends on both sides of this section, in which the turns of the spiral wire are approximately circular in cross section.
  • the coil ends are still formed by two approximately 0.5 mm long sections in which the turns of the coil wire have an oval cross section, so that the overall length of the electrode coil remains unchanged.
  • the core wires 3, 4 do not necessarily have to be made of iron, but can also be made of molybdenum, for example.
  • the invention is also applicable to triple coils, for example by winding the core wire 4 with the wires 1, 2, 3 thereon around a further core wire.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamp (AREA)
  • Wire Processing (AREA)
EP96111382A 1995-07-28 1996-07-15 Hélice pour électrode pour des lampes à décharge et procédé de fabrication d'une telle hélice pour électrode Withdrawn EP0756311A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19527653 1995-07-28
DE19527653A DE19527653A1 (de) 1995-07-28 1995-07-28 Elektrodenwendel für Entladungslampen und Verfahren zur Herstellung einer derartigen Elektrodenwendel

Publications (1)

Publication Number Publication Date
EP0756311A1 true EP0756311A1 (fr) 1997-01-29

Family

ID=7768045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111382A Withdrawn EP0756311A1 (fr) 1995-07-28 1996-07-15 Hélice pour électrode pour des lampes à décharge et procédé de fabrication d'une telle hélice pour électrode

Country Status (7)

Country Link
US (1) US5729081A (fr)
EP (1) EP0756311A1 (fr)
JP (1) JPH0945279A (fr)
KR (1) KR970008298A (fr)
CA (1) CA2181494C (fr)
DE (1) DE19527653A1 (fr)
HU (1) HU217141B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0926705A1 (fr) * 1997-12-23 1999-06-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Radiateur plat à densité lumineuse de surface modulée localement
US6892521B2 (en) * 2001-12-10 2005-05-17 Avraham Moshe Rosenwasser Slalum chain
US6809477B2 (en) * 2002-02-21 2004-10-26 General Electric Company Fluorescent lamp electrode for instant start circuits
US7665213B2 (en) * 2006-12-14 2010-02-23 Illinois Tool Works Inc. Metal stamping process using a wire preform
JP5193736B2 (ja) * 2008-08-11 2013-05-08 株式会社偕揚社 白熱ランプの発光体及び放電灯の電極
JP2010225420A (ja) * 2009-03-24 2010-10-07 Stanley Electric Co Ltd 熱陰極蛍光ランプおよび蛍光ランプ用電極
DE102013221570A1 (de) * 2013-10-23 2015-05-07 Osram Gmbh Verfahren zum Herstellen einer Elektrodenwendel, Verfahren zum Herstellen einer Entladungslampe, Elektrodenwendel und Entladungslampe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1034080A (en) * 1964-02-17 1966-06-29 Gen Electric Co Ltd Improvements in or relating to high pressure metal vapour electric discharge lamps and electrodes therefor
US3736458A (en) * 1971-07-06 1973-05-29 Gen Electric Filamentary electrode and fabrication thereof
US4277714A (en) * 1979-07-02 1981-07-07 Gte Products Corporation Metal halide arc discharge lamp having coiled coil electrodes
JPS56106359A (en) * 1980-01-29 1981-08-24 Toshiba Corp Electrode of discharge lamp
EP0700070A2 (fr) * 1994-09-01 1996-03-06 Osram Sylvania Inc. Cathode pour lampe à décharge haute intensité

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218345A (en) * 1935-04-10 1940-10-15 Spaeth Charles Incandescent lamp
US2329118A (en) * 1941-07-12 1943-09-07 Gen Electric Electrode for electrical discharge devices
US2394474A (en) * 1944-12-28 1946-02-05 Gen Electric Coiled filament or cathode and its manufacture
US2479192A (en) * 1946-06-28 1949-08-16 Gen Electric Cathode
US3069581A (en) * 1959-05-11 1962-12-18 Gen Electric Low pressure discharge lamp
US3189778A (en) * 1962-01-29 1965-06-15 Westinghouse Electric Corp Lamp filament connection
US3294125A (en) * 1963-11-14 1966-12-27 Westinghouse Electric Corp Electrode coil and method
US3729787A (en) * 1971-09-22 1973-05-01 Westinghouse Electric Corp Method and apparatus for manufacturing beaded filament-coil components for electric lamps
US3725720A (en) * 1972-07-12 1973-04-03 Westinghouse Electric Corp Electric lamp mount having a beaded filament coil
US3908251A (en) * 1974-04-11 1975-09-30 Gte Sylvania Inc Method of making beaded filament coil
DE3123442A1 (de) * 1981-06-12 1982-12-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Gluehwendel fuer eine elektrische lampe und verfahren zur herstellung
US5258687A (en) * 1991-06-13 1993-11-02 Gte Products Corporation Mercury vapor discharge device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1034080A (en) * 1964-02-17 1966-06-29 Gen Electric Co Ltd Improvements in or relating to high pressure metal vapour electric discharge lamps and electrodes therefor
US3736458A (en) * 1971-07-06 1973-05-29 Gen Electric Filamentary electrode and fabrication thereof
US4277714A (en) * 1979-07-02 1981-07-07 Gte Products Corporation Metal halide arc discharge lamp having coiled coil electrodes
JPS56106359A (en) * 1980-01-29 1981-08-24 Toshiba Corp Electrode of discharge lamp
EP0700070A2 (fr) * 1994-09-01 1996-03-06 Osram Sylvania Inc. Cathode pour lampe à décharge haute intensité

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 005, no. 179 (E - 082) 17 November 1981 (1981-11-17) *

Also Published As

Publication number Publication date
HU217141B (hu) 1999-11-29
HU9602055D0 (en) 1996-09-30
HUP9602055A2 (en) 1997-05-28
KR970008298A (ko) 1997-02-24
CA2181494A1 (fr) 1997-01-29
JPH0945279A (ja) 1997-02-14
CA2181494C (fr) 2008-03-25
HUP9602055A3 (en) 1998-06-29
DE19527653A1 (de) 1997-01-30
US5729081A (en) 1998-03-17

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