JPS57130334A - Oxide cathode - Google Patents

Oxide cathode

Info

Publication number
JPS57130334A
JPS57130334A JP1431481A JP1431481A JPS57130334A JP S57130334 A JPS57130334 A JP S57130334A JP 1431481 A JP1431481 A JP 1431481A JP 1431481 A JP1431481 A JP 1431481A JP S57130334 A JPS57130334 A JP S57130334A
Authority
JP
Japan
Prior art keywords
metal substrate
oxide layer
side part
making
acute angle
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
JP1431481A
Other languages
Japanese (ja)
Inventor
Takao Kawamura
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 JP1431481A priority Critical patent/JPS57130334A/en
Publication of JPS57130334A publication Critical patent/JPS57130334A/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
    • H01J1/18—Supports; Vibration-damping arrangements

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To prevent falling off of a oxide layer by providing a side part making an acute angle with its surface on a metal substrate surface on which the oxide layer is attached. CONSTITUTION:Both ends of a metal substrate 1 are fixed to a ceramic supporting plate 4 through supporting bars 3, and an alkaline earth metal oxide layer 2 is attached on a part of the surface of the metal substrate 1 as an electron radiation material. A hole 1a is formed in the part of the metal substrate 1 where the oxide layer 2 is attached, and the circumference of the hole 1 is set upright to form a side part 1b. This side part 1b is formed on the oxide layer 2 side of the metal substrate 1 while making an acute angle with the surface of the metal substrate 1. Other side part 1d making an acute angle with the surface is formed in the circumference of the metal substrate 1. Thus, the oxide layer is caught by the side part and its falling off from the metal substrate is prevented.
JP1431481A 1981-02-04 1981-02-04 Oxide cathode Pending JPS57130334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1431481A JPS57130334A (en) 1981-02-04 1981-02-04 Oxide cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1431481A JPS57130334A (en) 1981-02-04 1981-02-04 Oxide cathode

Publications (1)

Publication Number Publication Date
JPS57130334A true JPS57130334A (en) 1982-08-12

Family

ID=11857627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1431481A Pending JPS57130334A (en) 1981-02-04 1981-02-04 Oxide cathode

Country Status (1)

Country Link
JP (1) JPS57130334A (en)

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