JPS6477821A - Impregnated cathode - Google Patents

Impregnated cathode

Info

Publication number
JPS6477821A
JPS6477821A JP23216687A JP23216687A JPS6477821A JP S6477821 A JPS6477821 A JP S6477821A JP 23216687 A JP23216687 A JP 23216687A JP 23216687 A JP23216687 A JP 23216687A JP S6477821 A JPS6477821 A JP S6477821A
Authority
JP
Japan
Prior art keywords
cathode
cup
cathode body
sleeve
contacting
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
JP23216687A
Other languages
Japanese (ja)
Inventor
Yukio Suzuki
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 JP23216687A priority Critical patent/JPS6477821A/en
Publication of JPS6477821A publication Critical patent/JPS6477821A/en
Pending legal-status Critical Current

Links

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To prevent hole forming at welds due to fusion and gasification of an electron emitting substance by melting and fixing cathode sleeve to a cup in position not contacting a cathode body. CONSTITUTION:A cathode body 1 is formed by sintering a body made from tungsten powder pressed molded into convex shape in reductive atmosphere and impregnating electron emitting substance such as barium, calcium, and alminate, and a cup 2 is installed with an opening 2b at the bottom 2a of the cup 2 so that a columnar boss 1a of the convex cathode body 1 can be inserted. Further a cathode sleeve 3 is processed to a method capable of inserting from under the cup 2 and a leg 3a is arranged in contact with the other end 1b of the cathode body 1 for the purpose of supporting and shielding the cathode body 1. The cathode body 1, cup 2, and cathode sleeve 3 are assembled as shown in the attached illustration, and laser beam is irradiated to the side walls 2c, 3b of the cup 2 and cathode sleeve 3 in the position 4 not contacting the cathode body 1, to melt and fix them.
JP23216687A 1987-09-18 1987-09-18 Impregnated cathode Pending JPS6477821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23216687A JPS6477821A (en) 1987-09-18 1987-09-18 Impregnated cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23216687A JPS6477821A (en) 1987-09-18 1987-09-18 Impregnated cathode

Publications (1)

Publication Number Publication Date
JPS6477821A true JPS6477821A (en) 1989-03-23

Family

ID=16935028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23216687A Pending JPS6477821A (en) 1987-09-18 1987-09-18 Impregnated cathode

Country Status (1)

Country Link
JP (1) JPS6477821A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0511290U (en) * 1991-07-30 1993-02-12 関西日本電気株式会社 Impregnated cathode structure
JPH07176262A (en) * 1991-06-13 1995-07-14 Samsung Display Devices Co Ltd Impregnated cathode structure and preparation thereof
US5840245A (en) * 1992-04-15 1998-11-24 Johns Manville International, Inc. Air filter amd method for reducing the amount of microorganisms in contaminated air

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07176262A (en) * 1991-06-13 1995-07-14 Samsung Display Devices Co Ltd Impregnated cathode structure and preparation thereof
JPH0511290U (en) * 1991-07-30 1993-02-12 関西日本電気株式会社 Impregnated cathode structure
US5840245A (en) * 1992-04-15 1998-11-24 Johns Manville International, Inc. Air filter amd method for reducing the amount of microorganisms in contaminated air

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