JPS5676155A - High-pressure sodium-vapor lamp - Google Patents

High-pressure sodium-vapor lamp

Info

Publication number
JPS5676155A
JPS5676155A JP15230879A JP15230879A JPS5676155A JP S5676155 A JPS5676155 A JP S5676155A JP 15230879 A JP15230879 A JP 15230879A JP 15230879 A JP15230879 A JP 15230879A JP S5676155 A JPS5676155 A JP S5676155A
Authority
JP
Japan
Prior art keywords
electrode
core rod
electrode core
coils
pressure sodium
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
JP15230879A
Other languages
Japanese (ja)
Inventor
Yoshiro Ogata
Haruo Yamazaki
Takashi Ikeda
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP15230879A priority Critical patent/JPS5676155A/en
Publication of JPS5676155A publication Critical patent/JPS5676155A/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
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To stabilize the luminous color of a lamp and improve its life, by adequately determining dimensions of length and diameter of an electrode core rod part protruding from the end of electrode coils. CONSTITUTION:An electrode 4 is formed by an electrode core rod 6, electrode coils 7, 8 provided in such a manner as to surround the electrode core rod 6 and an electron emitting material 9 provided in air gap parts, formed among the electrode core rod 6 and the electrode coils 7, 8, so as to avoid its exposure in the electric discharge space of a luminous tube. The end part of the electrode core rod 6 is protruded from the electrode coils 7, 8. Protruding length (h)mm. of said end part and diameter (d)mm. of the electrode core rod 6 are determined to satisfy the relation 1.9<=h/d<=5.4.
JP15230879A 1979-11-24 1979-11-24 High-pressure sodium-vapor lamp Pending JPS5676155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15230879A JPS5676155A (en) 1979-11-24 1979-11-24 High-pressure sodium-vapor lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15230879A JPS5676155A (en) 1979-11-24 1979-11-24 High-pressure sodium-vapor lamp

Publications (1)

Publication Number Publication Date
JPS5676155A true JPS5676155A (en) 1981-06-23

Family

ID=15537679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15230879A Pending JPS5676155A (en) 1979-11-24 1979-11-24 High-pressure sodium-vapor lamp

Country Status (1)

Country Link
JP (1) JPS5676155A (en)

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