JPS554858A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPS554858A
JPS554858A JP7834378A JP7834378A JPS554858A JP S554858 A JPS554858 A JP S554858A JP 7834378 A JP7834378 A JP 7834378A JP 7834378 A JP7834378 A JP 7834378A JP S554858 A JPS554858 A JP S554858A
Authority
JP
Japan
Prior art keywords
bulb
main electrodes
obviated
overheat
prevented
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
JP7834378A
Other languages
Japanese (ja)
Inventor
Satoru Kono
Akihiro Kamiya
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 JP7834378A priority Critical patent/JPS554858A/en
Publication of JPS554858A publication Critical patent/JPS554858A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

PURPOSE: To lengthen the life of this lamp, by preventing de-transparency due to the overheat of a bulb wall by regulating distances among the electrode coils of main electrodes and the bulb wall.
CONSTITUTION: When the both ends of a bulb 1 in quartz glass are oressurization- crush sealed and main electrodes 2, 2 are arranged to the internal both ends, the shortest distances l among the electrode coils 2b of the main electrodes 2, 2 and an inner surface of the bulb 1 are controlled so as to become not less than 2mm. Thus, the extreme overheat of a bulb wall is prevented, the de-transparency of the quartz glass is not produced, the vanishing of sodium is obviated while preventing the blackening of tube end portions and the undesirable temperature rise of the temoerature of the coldest portion is obviated. Consequently, the rise of lamp voltage is prevented, a going-out phenomenon is eliminated and the life can be lengthened.
COPYRIGHT: (C)1980,JPO&Japio
JP7834378A 1978-06-28 1978-06-28 Metal halide lamp Pending JPS554858A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7834378A JPS554858A (en) 1978-06-28 1978-06-28 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7834378A JPS554858A (en) 1978-06-28 1978-06-28 Metal halide lamp

Publications (1)

Publication Number Publication Date
JPS554858A true JPS554858A (en) 1980-01-14

Family

ID=13659333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7834378A Pending JPS554858A (en) 1978-06-28 1978-06-28 Metal halide lamp

Country Status (1)

Country Link
JP (1) JPS554858A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510948A (en) * 1978-07-11 1980-01-25 Brother Ind Ltd Photoelectric workpiece guide apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510948A (en) * 1978-07-11 1980-01-25 Brother Ind Ltd Photoelectric workpiece guide apparatus

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