JPS54150870A - Metal vapor discharge lamp - Google Patents

Metal vapor discharge lamp

Info

Publication number
JPS54150870A
JPS54150870A JP5849978A JP5849978A JPS54150870A JP S54150870 A JPS54150870 A JP S54150870A JP 5849978 A JP5849978 A JP 5849978A JP 5849978 A JP5849978 A JP 5849978A JP S54150870 A JPS54150870 A JP S54150870A
Authority
JP
Japan
Prior art keywords
bulb
arc
electrodes
axis
center axis
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
JP5849978A
Other languages
Japanese (ja)
Inventor
Yujiro Ike
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5849978A priority Critical patent/JPS54150870A/en
Publication of JPS54150870A publication Critical patent/JPS54150870A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE: To provide a metal vapor discharge lamp, wherein the arc spot generating points of electrodes are located at least below the axis of a bulb thereby reducing the heat loss within the bulb to increase the efficiency of the lamp and to prevent the lowering of temperature of the coldest portion within the bulb which will otherwise be occurred.
CONSTITUTION: Electrodes 3a, 3b are opposed within a bulb 1, of quartz glass or the like, of a luminous tube housed in an outer tube (not shown) and are sealed in respective sealing portions 2, 2 at opposite ends of the bulb 1. Each axis 11 of the electrodes is slanted downward to be apart from a center axis Lv and a tip portion 10, so that arc spot generating points Pa, Pb which will be generated at tips of protruding ends of the electrodes will be displaced below the center axis Lv of the bulb. The arc will be forced upward by convention within the bulb 1 and the center of the arc will be convexed and therefore the arc as a whole is caused to approach the center axis Lv.
COPYRIGHT: (C)1979,JPO&Japio
JP5849978A 1978-05-17 1978-05-17 Metal vapor discharge lamp Pending JPS54150870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5849978A JPS54150870A (en) 1978-05-17 1978-05-17 Metal vapor discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5849978A JPS54150870A (en) 1978-05-17 1978-05-17 Metal vapor discharge lamp

Publications (1)

Publication Number Publication Date
JPS54150870A true JPS54150870A (en) 1979-11-27

Family

ID=13086104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5849978A Pending JPS54150870A (en) 1978-05-17 1978-05-17 Metal vapor discharge lamp

Country Status (1)

Country Link
JP (1) JPS54150870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031062U (en) * 1983-08-10 1985-03-02 東芝ライテック株式会社 small metal halide lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031062U (en) * 1983-08-10 1985-03-02 東芝ライテック株式会社 small metal halide lamp

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