JPS5641641A - Manufacture of directly heated type cathode element - Google Patents

Manufacture of directly heated type cathode element

Info

Publication number
JPS5641641A
JPS5641641A JP11613979A JP11613979A JPS5641641A JP S5641641 A JPS5641641 A JP S5641641A JP 11613979 A JP11613979 A JP 11613979A JP 11613979 A JP11613979 A JP 11613979A JP S5641641 A JPS5641641 A JP S5641641A
Authority
JP
Japan
Prior art keywords
metallic plates
metal strip
those
united
cathode element
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
JP11613979A
Other languages
Japanese (ja)
Other versions
JPS6257057B2 (en
Inventor
Takeo Tsunoda
Shigekazu Shibata
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 JP11613979A priority Critical patent/JPS5641641A/en
Publication of JPS5641641A publication Critical patent/JPS5641641A/en
Publication of JPS6257057B2 publication Critical patent/JPS6257057B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

PURPOSE:To obtain efficiently a directly heated type cathode element having good characteristics, by uniting two thin metallic plates, which serve as filaments, with a metal strip of a greater thcikness then those of the metallic plates and having an elongated rectangular shape which serves as a substrate metal plate, and puncling it into a desired shape. CONSTITUTION:Between two sheets of thin, rectangular metallic plates 21 made of a Ni-W alloy or the like, is held an elongated rectangular metal strip 22 with its longitudinal axis aligned with those of the metallic plates 21. The metal strip 22 has a thickness greater than those of the metallic plates 21 and a width approximately equal to the diameter of a substrate metal disc and is made of Ni and a trace amount of a ruducing agent for an electron-emitting substance, such as Mg or the like. The metal strip 22 and metallic plates 21 are continuously united by laser or the like. The thus-united metallic plate unit is punched in a direction perpendicular to the longitudinal direction of the elongated metal strip 22 as shown by the dotted lines in the drawing into a shape that consists of a disc-shaped substrate metal plate and a pair of filaments united integrally together. Each punched-out element is connected at both ends thereof with electrode terminals. In this manner, a cathode element of good characteristics can be obtained with extremely high efficiency.
JP11613979A 1979-09-12 1979-09-12 Manufacture of directly heated type cathode element Granted JPS5641641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11613979A JPS5641641A (en) 1979-09-12 1979-09-12 Manufacture of directly heated type cathode element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11613979A JPS5641641A (en) 1979-09-12 1979-09-12 Manufacture of directly heated type cathode element

Publications (2)

Publication Number Publication Date
JPS5641641A true JPS5641641A (en) 1981-04-18
JPS6257057B2 JPS6257057B2 (en) 1987-11-28

Family

ID=14679694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11613979A Granted JPS5641641A (en) 1979-09-12 1979-09-12 Manufacture of directly heated type cathode element

Country Status (1)

Country Link
JP (1) JPS5641641A (en)

Also Published As

Publication number Publication date
JPS6257057B2 (en) 1987-11-28

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