JPS57138743A - Electronic tube cathode structure - Google Patents

Electronic tube cathode structure

Info

Publication number
JPS57138743A
JPS57138743A JP2427681A JP2427681A JPS57138743A JP S57138743 A JPS57138743 A JP S57138743A JP 2427681 A JP2427681 A JP 2427681A JP 2427681 A JP2427681 A JP 2427681A JP S57138743 A JPS57138743 A JP S57138743A
Authority
JP
Japan
Prior art keywords
spacer
electronic tube
tube cathode
center
lead
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
JP2427681A
Other languages
Japanese (ja)
Other versions
JPH0241858B2 (en
Inventor
Mamoru Kurokuzuhara
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 JP2427681A priority Critical patent/JPS57138743A/en
Publication of JPS57138743A publication Critical patent/JPS57138743A/en
Publication of JPH0241858B2 publication Critical patent/JPH0241858B2/ja
Granted 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

  • Microwave Tubes (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To obtain an electronic tube cathode having a simple structure without requirement of stopper fitting and with high vibration-resistance by providing a bent part of a center lead of the electronic tube cathode structure just under the position of a spacer at the time of the use thereof. CONSTITUTION:A helical filament 1 emitting hot electrons is put between upper and lower end shields 2, 3. And, the upper and lower end shields 2, 3 are fixed on the end parts of a center lead 4 and supported by the end of a side lead 5, respectively. A center lead bent part 4b is provided just under the piercing part of the center hold of a spacer 10 of a center lead 4 to prevent a movement of the spacer in the axial direction. And the filament 1 is brazed to the upper and lower end shields 2, 3 using a wax material having a melting point less than burning temperature of the spacer 10.
JP2427681A 1981-02-23 1981-02-23 Electronic tube cathode structure Granted JPS57138743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2427681A JPS57138743A (en) 1981-02-23 1981-02-23 Electronic tube cathode structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2427681A JPS57138743A (en) 1981-02-23 1981-02-23 Electronic tube cathode structure

Publications (2)

Publication Number Publication Date
JPS57138743A true JPS57138743A (en) 1982-08-27
JPH0241858B2 JPH0241858B2 (en) 1990-09-19

Family

ID=12133674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2427681A Granted JPS57138743A (en) 1981-02-23 1981-02-23 Electronic tube cathode structure

Country Status (1)

Country Link
JP (1) JPS57138743A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6255847A (en) * 1985-09-04 1987-03-11 Hitachi Ltd Cathode for magnetron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6255847A (en) * 1985-09-04 1987-03-11 Hitachi Ltd Cathode for magnetron

Also Published As

Publication number Publication date
JPH0241858B2 (en) 1990-09-19

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