JPS55124926A - Directly-heated cathode - Google Patents

Directly-heated cathode

Info

Publication number
JPS55124926A
JPS55124926A JP3189579A JP3189579A JPS55124926A JP S55124926 A JPS55124926 A JP S55124926A JP 3189579 A JP3189579 A JP 3189579A JP 3189579 A JP3189579 A JP 3189579A JP S55124926 A JPS55124926 A JP S55124926A
Authority
JP
Japan
Prior art keywords
filament
base metal
sides
directly
surround
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
JP3189579A
Other languages
Japanese (ja)
Inventor
Yukio Takanashi
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 JP3189579A priority Critical patent/JPS55124926A/en
Publication of JPS55124926A publication Critical patent/JPS55124926A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To cause a dimension between electrodes of the cathode not to be changed when the temperature of a filament rises, by securing a base metal in such a manner as to surround both sides of the filament. CONSTITUTION:To an almost central part of a ribbon-shaped filament 7, a base metal 10 is secured. Here the base metal 10 is firmly attached in such a manner as to surround both sides of the filament 7. For instance, the base metal 10 is formed into a flatten cylindrical shape, in which the filament 7 is placed, eventually enclosing the both sides of the filament 7. In this way, a distortion of the filament 7 due to the on-off operation can be equalized not causing a warp to be generated in the filament, thus to eliminate a change of the distance between electrodes.
JP3189579A 1979-03-19 1979-03-19 Directly-heated cathode Pending JPS55124926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3189579A JPS55124926A (en) 1979-03-19 1979-03-19 Directly-heated cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3189579A JPS55124926A (en) 1979-03-19 1979-03-19 Directly-heated cathode

Publications (1)

Publication Number Publication Date
JPS55124926A true JPS55124926A (en) 1980-09-26

Family

ID=12343744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3189579A Pending JPS55124926A (en) 1979-03-19 1979-03-19 Directly-heated cathode

Country Status (1)

Country Link
JP (1) JPS55124926A (en)

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