JPS5719955A - Metal vapor discharge lamp - Google Patents

Metal vapor discharge lamp

Info

Publication number
JPS5719955A
JPS5719955A JP9372280A JP9372280A JPS5719955A JP S5719955 A JPS5719955 A JP S5719955A JP 9372280 A JP9372280 A JP 9372280A JP 9372280 A JP9372280 A JP 9372280A JP S5719955 A JPS5719955 A JP S5719955A
Authority
JP
Japan
Prior art keywords
pipe
ceramic
electrode
luminous tube
metallic
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
JP9372280A
Other languages
Japanese (ja)
Inventor
Keiichi Baba
Kanji Soma
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9372280A priority Critical patent/JPS5719955A/en
Publication of JPS5719955A publication Critical patent/JPS5719955A/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
    • H01J61/50—Auxiliary parts or solid material within the envelope for reducing risk of explosion upon breakage of the envelope, e.g. for use in mines

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To prevent cracking of a luminous tube near the electrode by providing a melt-resisting metallic pipe near the electrode of the luminous tube. CONSTITUTION:A ceramic pipe 1 with a larger diameter on the end and ceramic cap 2, and an exhasting pipe 4 consisting of niobium and the ceramic cap 2 are welded in a high temperature vacuum atmosphere through a bonding agent 5. An electrode 3 is welded to the exhaust pipe 4, and the ceramic pipe 1 is degassed and sealed with sodium, mercury, and a rare gas such as xenon through the exhaust pipe 4. A melt-resisting metallic pipe 6 consisting of tungusten is provided closely around the electrode 3 in the luminous tube, the outside diameter of the metallic pipe 6 is larger than the inside diameter of a central small part of the ceramic pipe 1 and smaller than the outside diameter of an end large part of the ceramic pipe 1, thus the metallic pipe 6 is fixed to the end of the ceramic pipe 1 covering the electrode 3.
JP9372280A 1980-07-09 1980-07-09 Metal vapor discharge lamp Pending JPS5719955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9372280A JPS5719955A (en) 1980-07-09 1980-07-09 Metal vapor discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9372280A JPS5719955A (en) 1980-07-09 1980-07-09 Metal vapor discharge lamp

Publications (1)

Publication Number Publication Date
JPS5719955A true JPS5719955A (en) 1982-02-02

Family

ID=14090295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9372280A Pending JPS5719955A (en) 1980-07-09 1980-07-09 Metal vapor discharge lamp

Country Status (1)

Country Link
JP (1) JPS5719955A (en)

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