JPS54150870A - Metal vapor discharge lamp - Google Patents
Metal vapor discharge lampInfo
- 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
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
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)
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 |
-
1978
- 1978-05-17 JP JP5849978A patent/JPS54150870A/en active Pending
Cited By (1)
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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