JPS5550568A - Metal vapor electric discharge lamp - Google Patents
Metal vapor electric discharge lampInfo
- Publication number
- JPS5550568A JPS5550568A JP12483778A JP12483778A JPS5550568A JP S5550568 A JPS5550568 A JP S5550568A JP 12483778 A JP12483778 A JP 12483778A JP 12483778 A JP12483778 A JP 12483778A JP S5550568 A JPS5550568 A JP S5550568A
- Authority
- JP
- Japan
- Prior art keywords
- bulb
- diameter
- metal vapor
- center
- efficiency
- 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
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
PURPOSE: To obtain desirable vapor pressure and to improve lamp efficiency and life property of flux maintaining efficiency of a metal vapor electric discharging lamp, by making the inside diameter of the top of the luminous tube bulb thin relatively to the center thereof to increase the temperature of the lowest temperature portion.
CONSTITUTION: Prescribed amount of mercury, sodium, and a starting rare gas such as xenon are charged in the luminous tube, where the tube 2 is connected to the base 10 and eyelet terminal 11 through the conductive holder 7, conductive supporter 8, and inside lead wire 9. The inside diameter d1 of the bulb 3 is formed smaller at the top than at the center d2, but the outside diameter is formed even throughout the bulb. The length 1 along the bulb direction of the smaller diameter d1 portion is formed shorter than that of the projection of the electrode 6 extending to the inside of the bulb. Thereby the lowest temperature portion is heated effectively, and the lamp efficiency and life are improved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12483778A JPS5550568A (en) | 1978-10-11 | 1978-10-11 | Metal vapor electric discharge lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12483778A JPS5550568A (en) | 1978-10-11 | 1978-10-11 | Metal vapor electric discharge lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5550568A true JPS5550568A (en) | 1980-04-12 |
Family
ID=14895309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12483778A Pending JPS5550568A (en) | 1978-10-11 | 1978-10-11 | Metal vapor electric discharge lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5550568A (en) |
-
1978
- 1978-10-11 JP JP12483778A patent/JPS5550568A/en active Pending
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