EP0282739A1 - Blitzlampe - Google Patents

Blitzlampe Download PDF

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Publication number
EP0282739A1
EP0282739A1 EP88102116A EP88102116A EP0282739A1 EP 0282739 A1 EP0282739 A1 EP 0282739A1 EP 88102116 A EP88102116 A EP 88102116A EP 88102116 A EP88102116 A EP 88102116A EP 0282739 A1 EP0282739 A1 EP 0282739A1
Authority
EP
European Patent Office
Prior art keywords
sintered body
base body
flash lamp
sintered
lamp according
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Withdrawn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
EP88102116A
Other languages
German (de)
English (en)
French (fr)
Inventor
Michael Dipl-Phys. Lausch
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.)
Heimann GmbH
Original Assignee
Heimann GmbH
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 Heimann GmbH filed Critical Heimann GmbH
Publication of EP0282739A1 publication Critical patent/EP0282739A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/80—Lamps suitable only for intermittent operation, e.g. flash lamp

Definitions

  • the invention relates to a flash lamp which contains two electrodes in a gas-filled, translucent housing, the cathode being composed of a base body and a sintered body placed thereon, and the sintered body being provided with a bore in which the base body is inserted.
  • the invention has for its object to design a flash lamp of the type mentioned so that the blackening of the inner wall of the discharge tube is reduced due to evaporated material compared to the prior art with good heat transfer between the sintered body and the base body.
  • This object is achieved in that the sintered body is pressed onto the base body under high pressure and is sintered there. Due to the small shrinkage of the sintered body that occurs during the sintering process, there is an intimate connection between the sintered body and the base body and thus an optimal heat transfer.
  • An expedient embodiment of the invention is that the volume of the sintered body is significantly smaller than the volume of the main body. This results in a high stability of the cathode.
  • the figures show the cathode-side end of a flash lamp which has a glass tube 1.
  • a base body 2 on which a hollow cylindrical sintered body 3 is placed, is melted in the glass tube 1 as the cathode.
  • the base body 2 has a shoulder 4 which penetrates the bore of the sintered body 3 and projects somewhat beyond the sintered body 3.
  • the base body 5 is configured similarly to the base body 2. It has an extension 6 on which the sintered body 7 is pressed and sintered. In contrast to the example according to FIG. 1, however, the sintered body 7 is cup-shaped, so that the base body 5 does not protrude beyond it. The sintered body 7 sits as a cap on the neck 6.
  • the base body 2 or 5 can consist of thoriated tungsten.
  • the base body 2 is melted tightly in the glass tube 1. This is possible with a large diameter of the glass tube 1 compared to the diameter of the base body 2. With a small diameter of the glass tube 1, a thin electrode wire 8 can be melted into it, on which the base body 2 is placed in the interior of the glass tube 1 and then largely fills the clear width of the glass tube 1. This is shown in FIG. 3.
  • the structure of the base body 2 corresponds to that of the exemplary embodiment according to FIG. 1.
  • FIG. 3 shows the electrode wire 8, which is melted into the glass tube 1 and is electrically conductively connected to the base body 2 in the interior. Outside the glass tube 1, it is conductively connected to a connection 11.
  • FIG. 3 also shows the anode-side end of the flash lamp with an anode body 10 which is placed on a wire 9 in an electrically conductive manner, which is melted into the glass tube 1 and is electrically conductively connected to a terminal 12 outside the glass tube 1.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
EP88102116A 1987-02-27 1988-02-12 Blitzlampe Withdrawn EP0282739A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8703095 1987-02-27
DE8703095U 1987-02-27
DE8704316U 1987-03-23
DE8704316U DE8704316U1 (de) 1987-02-27 1987-03-23 Blitzlampe

Publications (1)

Publication Number Publication Date
EP0282739A1 true EP0282739A1 (de) 1988-09-21

Family

ID=25951572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102116A Withdrawn EP0282739A1 (de) 1987-02-27 1988-02-12 Blitzlampe

Country Status (4)

Country Link
US (1) US4853596A (enrdf_load_stackoverflow)
EP (1) EP0282739A1 (enrdf_load_stackoverflow)
JP (1) JPS63141552U (enrdf_load_stackoverflow)
DE (1) DE8704316U1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0371164A1 (de) * 1988-11-29 1990-06-06 Heimann Optoelectronics GmbH Blitzlampe
EP2428976A4 (en) * 2009-08-24 2013-01-16 Panasonic Corp FLASH DISCHARGE TUBE ELECTRODE AND FLASH DISCHARGE TUBES

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5606219A (en) * 1992-12-25 1997-02-25 Fuji Photo Film Co., Ltd. Cathode for electronic flash tube
US8255133B2 (en) * 2009-06-05 2012-08-28 Toyota Motor Engineering & Manufacturing North America, Inc. Shift timing indicator system for vehicular manual transmission

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031421B (de) * 1956-10-16 1958-06-04 Patra Patent Treuhand Nicht vorheizbare Oxydelektrode fuer Blitzlicht-Entladungslampen und Hochdruck-Entladungslampen
US3916241A (en) 1972-06-14 1975-10-28 Gte Sylvania Inc High pressure electric discharge lamp and electrode therefor
GB2171554A (en) 1985-02-22 1986-08-28 Heimann Gmbh Gas-discharge lamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886737A (en) * 1949-11-11 1959-05-12 Fruengel Frank Quick-responsive spark gap device
FR1328330A (fr) * 1961-01-02 1963-05-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh électrode frittée pour lampe à décharge dans un gaz ou dans une vapeur
US3849690A (en) * 1973-11-05 1974-11-19 Gte Sylvania Inc Flash tube having improved cathode
US4315187A (en) * 1979-11-13 1982-02-09 Nam Kwong Electric Co. Ltd. Stroboscopic dishcharge tube for photography
JPS5810676A (ja) * 1981-07-13 1983-01-21 株式会社東芝 核燃料被覆管の製造方法
DE3519066A1 (de) * 1985-05-28 1986-12-04 Heimann Gmbh, 6200 Wiesbaden Gasentladungslampe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031421B (de) * 1956-10-16 1958-06-04 Patra Patent Treuhand Nicht vorheizbare Oxydelektrode fuer Blitzlicht-Entladungslampen und Hochdruck-Entladungslampen
US3916241A (en) 1972-06-14 1975-10-28 Gte Sylvania Inc High pressure electric discharge lamp and electrode therefor
GB2171554A (en) 1985-02-22 1986-08-28 Heimann Gmbh Gas-discharge lamp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 81 (E-238)[1518], 13. April 1984; & JP-A-59 000 848 (USHIO DENKI K.K.) 06-01-1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0371164A1 (de) * 1988-11-29 1990-06-06 Heimann Optoelectronics GmbH Blitzlampe
EP2428976A4 (en) * 2009-08-24 2013-01-16 Panasonic Corp FLASH DISCHARGE TUBE ELECTRODE AND FLASH DISCHARGE TUBES

Also Published As

Publication number Publication date
DE8704316U1 (de) 1988-06-30
JPS63141552U (enrdf_load_stackoverflow) 1988-09-19
US4853596A (en) 1989-08-01

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