JPS554860A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPS554860A
JPS554860A JP7834978A JP7834978A JPS554860A JP S554860 A JPS554860 A JP S554860A JP 7834978 A JP7834978 A JP 7834978A JP 7834978 A JP7834978 A JP 7834978A JP S554860 A JPS554860 A JP S554860A
Authority
JP
Japan
Prior art keywords
bulb
lamp
metal
luminous tube
tholium
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
JP7834978A
Other languages
Japanese (ja)
Inventor
Satoru Kono
Akihiro Kamiya
Bungo Nakahara
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 JP7834978A priority Critical patent/JPS554860A/en
Publication of JPS554860A publication Critical patent/JPS554860A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE: To lengthen the life of this lamp, by preventing the rise of lamp voltage by enclosing metal thorium in a luminous tube bulb.
CONSTITUTION: A luminous tube is produced in such a manner that the both ends of a bulb 1 in quartz glass are pressurization-crush sealed, a thorium oxide emitter is applied to the internal both ends and main electrodes 2, 2, which discharge is facilitated, are arranged. A fixed quantity of mercury, rare gases for starting and halides, such as, NaI, TlI, InI, etc. are enclosed in the luminous tube bulb 1 while metal tholium is enclosed. Consequently, metal tholium prevents the transmission of sodium through the quartz glass during lighting, and obviates the formation of free halogen in the bulb 1, and the rise of lamp voltage is checked, thus lengthening the life of this lamp.
COPYRIGHT: (C)1980,JPO&Japio
JP7834978A 1978-06-28 1978-06-28 Metal halide lamp Pending JPS554860A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7834978A JPS554860A (en) 1978-06-28 1978-06-28 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7834978A JPS554860A (en) 1978-06-28 1978-06-28 Metal halide lamp

Publications (1)

Publication Number Publication Date
JPS554860A true JPS554860A (en) 1980-01-14

Family

ID=13659503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7834978A Pending JPS554860A (en) 1978-06-28 1978-06-28 Metal halide lamp

Country Status (1)

Country Link
JP (1) JPS554860A (en)

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