JPS55144643A - Lamp electrode - Google Patents

Lamp electrode

Info

Publication number
JPS55144643A
JPS55144643A JP5387079A JP5387079A JPS55144643A JP S55144643 A JPS55144643 A JP S55144643A JP 5387079 A JP5387079 A JP 5387079A JP 5387079 A JP5387079 A JP 5387079A JP S55144643 A JPS55144643 A JP S55144643A
Authority
JP
Japan
Prior art keywords
narrowed
width
thin plate
plate
electrode
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.)
Granted
Application number
JP5387079A
Other languages
Japanese (ja)
Other versions
JPS6221220B2 (en
Inventor
Hiroshi Sugiyama
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 Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5387079A priority Critical patent/JPS55144643A/en
Publication of JPS55144643A publication Critical patent/JPS55144643A/en
Publication of JPS6221220B2 publication Critical patent/JPS6221220B2/ja
Granted 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

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To prolong the life of an electrode, simultaneously save its preheat current and shorten the length of its lighting time, by forming a layer of thermion emitting material on surfaces of a plate-shaped base material where a narrowed width portion is constructed. CONSTITUTION:A narrowed width portion 10 is constructed in the central part of a thin plate 11 made of tungsten on surfaces of which a thermion emitting material 12 is processed a sputtering. The width-narrowed portion 10 permits its resistance value to be higher than that of both end parts of said plate and its temperature to easily rise higher. Accordingly, if conditions at end parts of the thin plate 11 are made the same as those for a rectangular thin plate 8, the width-narrowed portion 10 can permit an electrode to reach the arcing voltage by a less preheat current.
JP5387079A 1979-04-28 1979-04-28 Lamp electrode Granted JPS55144643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5387079A JPS55144643A (en) 1979-04-28 1979-04-28 Lamp electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5387079A JPS55144643A (en) 1979-04-28 1979-04-28 Lamp electrode

Publications (2)

Publication Number Publication Date
JPS55144643A true JPS55144643A (en) 1980-11-11
JPS6221220B2 JPS6221220B2 (en) 1987-05-12

Family

ID=12954782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5387079A Granted JPS55144643A (en) 1979-04-28 1979-04-28 Lamp electrode

Country Status (1)

Country Link
JP (1) JPS55144643A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS632241A (en) * 1986-06-20 1988-01-07 Tadashi Hirotsune Fluorescent lamp device
JPH0668845A (en) * 1992-08-13 1994-03-11 Matsushita Electric Works Ltd Cathode for electron tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0281819U (en) * 1988-12-14 1990-06-25

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS494619U (en) * 1972-04-14 1974-01-16
JPS4924236U (en) * 1972-05-30 1974-03-01

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS494619U (en) * 1972-04-14 1974-01-16
JPS4924236U (en) * 1972-05-30 1974-03-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS632241A (en) * 1986-06-20 1988-01-07 Tadashi Hirotsune Fluorescent lamp device
JPH0668845A (en) * 1992-08-13 1994-03-11 Matsushita Electric Works Ltd Cathode for electron tube

Also Published As

Publication number Publication date
JPS6221220B2 (en) 1987-05-12

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