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JPS57182958A - Low-pressure steam electric-discharge lamp - Google Patents

Low-pressure steam electric-discharge lamp

Info

Publication number
JPS57182958A
JPS57182958A JP5766982A JP5766982A JPS57182958A JP S57182958 A JPS57182958 A JP S57182958A JP 5766982 A JP5766982 A JP 5766982A JP 5766982 A JP5766982 A JP 5766982A JP S57182958 A JPS57182958 A JP S57182958A
Authority
JP
Japan
Prior art keywords
tube
bulb
discharge lamp
low
anodes
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
JP5766982A
Other languages
Japanese (ja)
Inventor
Yoshio Watanabe
Mikiya Yamane
Koichi Tomura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5766982A priority Critical patent/JPS57182958A/en
Publication of JPS57182958A publication Critical patent/JPS57182958A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To stabilize the arc of a low-pressure steam electric-discharge lamp by adjusting appropriately the relationship among the maximum distance, at a section perpendicular to the axis of an outer bulb, between the inner side of the outer glass bulb and the outer side of an inner glass tube, the length of the outer circumference of the inner glass tube, and the number of anodes. CONSTITUTION:A low pressure electric-discharge lamp consists of an outer glass bulb 1 and an inner glass tube 2. The base part of the inner tube 2 is fused to the outer bulb 1, and a space is provided around the extreme end of the inner tube 2. A cathode 6 is installed inside the base part of the inner tube 2, and a plural number of anodes are installed outside the base part of the tube 2. The maximum distance (a) mm. between the inner wall of the outer bulb 1 and the outer wall of the inner tube 2, the length (b) mm. of the outer circumference of the inner tube 2, and the number (n) of the anodes are adjusted so that they satisfy the relationship of adivided by (bdivided by n)>=0.35.
JP5766982A 1982-04-07 1982-04-07 Low-pressure steam electric-discharge lamp Pending JPS57182958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5766982A JPS57182958A (en) 1982-04-07 1982-04-07 Low-pressure steam electric-discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5766982A JPS57182958A (en) 1982-04-07 1982-04-07 Low-pressure steam electric-discharge lamp

Publications (1)

Publication Number Publication Date
JPS57182958A true JPS57182958A (en) 1982-11-11

Family

ID=13062310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5766982A Pending JPS57182958A (en) 1982-04-07 1982-04-07 Low-pressure steam electric-discharge lamp

Country Status (1)

Country Link
JP (1) JPS57182958A (en)

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