JPS56134465A - Cathode for short-arc electric-discharge lamp - Google Patents

Cathode for short-arc electric-discharge lamp

Info

Publication number
JPS56134465A
JPS56134465A JP3695980A JP3695980A JPS56134465A JP S56134465 A JPS56134465 A JP S56134465A JP 3695980 A JP3695980 A JP 3695980A JP 3695980 A JP3695980 A JP 3695980A JP S56134465 A JPS56134465 A JP S56134465A
Authority
JP
Japan
Prior art keywords
cathode
cone
chip
short
pointed
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.)
Pending
Application number
JP3695980A
Other languages
Japanese (ja)
Inventor
Yoshihiro Kasai
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.)
Ushio Denki KK
Ushio Inc
Original Assignee
Ushio Denki KK
Ushio Inc
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 Ushio Denki KK, Ushio Inc filed Critical Ushio Denki KK
Priority to JP3695980A priority Critical patent/JPS56134465A/en
Publication of JPS56134465A publication Critical patent/JPS56134465A/en
Pending legal-status Critical Current

Links

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
    • 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

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To prevent the fluctuation of the brilliant area of a cathode after a long use of the cathode, by fixing a chip, which protrudes from the center of the pointed surface of a cone, to the cone which is unified with the body of the cathode. CONSTITUTION:A flat poited-end surface 6, which is perpendicular to a center axis X, is formed at the end of a cone 2 which adjoins a columnar body 1. A chip 7, which protrudes outward from the pointed-end surface 6 along the center axis X, is fixed to the center of the surface 6. Since single crystal developing area is restricted to the chip 7 during the use of a cathode, the arc-producing area of the cathode is restricted to the chip 7 protruding from the pointed-end surface 6 of the cone 2.
JP3695980A 1980-03-25 1980-03-25 Cathode for short-arc electric-discharge lamp Pending JPS56134465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3695980A JPS56134465A (en) 1980-03-25 1980-03-25 Cathode for short-arc electric-discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3695980A JPS56134465A (en) 1980-03-25 1980-03-25 Cathode for short-arc electric-discharge lamp

Publications (1)

Publication Number Publication Date
JPS56134465A true JPS56134465A (en) 1981-10-21

Family

ID=12484276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3695980A Pending JPS56134465A (en) 1980-03-25 1980-03-25 Cathode for short-arc electric-discharge lamp

Country Status (1)

Country Link
JP (1) JPS56134465A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003257364A (en) * 2002-03-05 2003-09-12 Ushio Inc Short arc mercury lamp
US6720731B2 (en) 2001-08-30 2004-04-13 Ushiodenki Kabushiki Kaisha Mercury discharge lamp of the short arc type
US6768263B2 (en) 2001-10-30 2004-07-27 Ushio Denki Kabushiki Kaisya Short arc type mercury lamp

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146441A (en) * 1974-10-18 1976-04-20 Nichiden Kikai Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146441A (en) * 1974-10-18 1976-04-20 Nichiden Kikai Kk

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6720731B2 (en) 2001-08-30 2004-04-13 Ushiodenki Kabushiki Kaisha Mercury discharge lamp of the short arc type
US6768263B2 (en) 2001-10-30 2004-07-27 Ushio Denki Kabushiki Kaisya Short arc type mercury lamp
JP2003257364A (en) * 2002-03-05 2003-09-12 Ushio Inc Short arc mercury lamp

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