JPS5550568A - Metal vapor electric discharge lamp - Google Patents

Metal vapor electric discharge lamp

Info

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
Application number
JP12483778A
Other languages
Japanese (ja)
Inventor
Yuji Danno
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 JP12483778A priority Critical patent/JPS5550568A/en
Publication of JPS5550568A publication Critical patent/JPS5550568A/en
Pending legal-status Critical Current

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
JP12483778A 1978-10-11 1978-10-11 Metal vapor electric discharge lamp Pending JPS5550568A (en)

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)

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