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GB2188771B - Dispenser cathode and method of manufacture therefor - Google Patents

Dispenser cathode and method of manufacture therefor

Info

Publication number
GB2188771B
GB2188771B GB8705511A GB8705511A GB2188771B GB 2188771 B GB2188771 B GB 2188771B GB 8705511 A GB8705511 A GB 8705511A GB 8705511 A GB8705511 A GB 8705511A GB 2188771 B GB2188771 B GB 2188771B
Authority
GB
United Kingdom
Prior art keywords
dispenser cathode
manufacture therefor
therefor
manufacture
dispenser
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.)
Expired - Fee Related
Application number
GB8705511A
Other versions
GB8705511D0 (en
GB2188771A (en
Inventor
Louis Raymond Falce
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.)
Ceradyne Inc
Original Assignee
Ceradyne Inc
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 Ceradyne Inc filed Critical Ceradyne Inc
Publication of GB8705511D0 publication Critical patent/GB8705511D0/en
Publication of GB2188771A publication Critical patent/GB2188771A/en
Application granted granted Critical
Publication of GB2188771B publication Critical patent/GB2188771B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode
GB8705511A 1986-04-01 1987-03-09 Dispenser cathode and method of manufacture therefor Expired - Fee Related GB2188771B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84685986A 1986-04-01 1986-04-01

Publications (3)

Publication Number Publication Date
GB8705511D0 GB8705511D0 (en) 1987-04-15
GB2188771A GB2188771A (en) 1987-10-07
GB2188771B true GB2188771B (en) 1990-12-19

Family

ID=25299143

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8705511A Expired - Fee Related GB2188771B (en) 1986-04-01 1987-03-09 Dispenser cathode and method of manufacture therefor

Country Status (7)

Country Link
JP (1) JPS62237634A (en)
KR (1) KR950002566B1 (en)
DE (1) DE3708687A1 (en)
FR (1) FR2597660A1 (en)
GB (1) GB2188771B (en)
IT (1) IT1202706B (en)
NL (1) NL8700652A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0821310B2 (en) * 1986-09-03 1996-03-04 株式会社日立製作所 Impregnated type cathode and method for producing the same
US4837480A (en) * 1988-03-28 1989-06-06 Hughes Aircraft Company Simplified process for fabricating dispenser cathodes
KR920004900B1 (en) * 1990-03-13 1992-06-22 삼성전관 주식회사 Impregnated Cathode Structure and Manufacturing Method Thereof
DE4114856A1 (en) * 1991-05-07 1992-11-12 Licentia Gmbh STOCK CATHODE AND METHOD FOR THE PRODUCTION THEREOF
KR100281800B1 (en) * 1996-06-27 2001-02-15 윤종용 Microwave power cutoff device
CN102637566B (en) * 2012-03-30 2014-11-19 安徽华东光电技术研究所 Barium-tungsten cathode with high current density and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1264087A (en) * 1969-11-21 1972-02-16
GB2050045A (en) * 1979-05-29 1980-12-31 Emi Varian Ltd Thermionic cathode
GB2060246A (en) * 1979-10-01 1981-04-29 Hitachi Ltd Impregnated cathode
EP0156454A1 (en) * 1984-02-24 1985-10-02 Thorn Emi-Varian Limited Thermionic electron emitter
GB2170950A (en) * 1985-02-08 1986-08-13 Hitachi Ltd Impregnated cathode

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE507171A (en) * 1950-11-18
US2741717A (en) * 1951-06-14 1956-04-10 Siemens Ag Dispenser type cathode having gettercoated parts
NL96853C (en) * 1953-09-24
HU143979A (en) * 1953-11-05
DE1138870B (en) * 1960-09-21 1962-10-31 Siemens Ag Storage cathode for electrical discharge vessels
DE1132256B (en) * 1961-12-27 1962-06-28 Siemens Ag Cathode for electrical discharge vessels and process for their manufacture
US3373307A (en) * 1963-11-21 1968-03-12 Philips Corp Dispenser cathode
DE1223062B (en) * 1964-02-14 1966-08-18 Siemens Ag Storage cathode for electrical discharge vessels and process for their manufacture
JPS62133632A (en) * 1985-12-04 1987-06-16 Nec Corp Impregnated type cathode

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1264087A (en) * 1969-11-21 1972-02-16
GB2050045A (en) * 1979-05-29 1980-12-31 Emi Varian Ltd Thermionic cathode
GB2060246A (en) * 1979-10-01 1981-04-29 Hitachi Ltd Impregnated cathode
EP0156454A1 (en) * 1984-02-24 1985-10-02 Thorn Emi-Varian Limited Thermionic electron emitter
GB2170950A (en) * 1985-02-08 1986-08-13 Hitachi Ltd Impregnated cathode

Also Published As

Publication number Publication date
NL8700652A (en) 1987-11-02
GB8705511D0 (en) 1987-04-15
JPS62237634A (en) 1987-10-17
IT8719867A0 (en) 1987-03-26
FR2597660A1 (en) 1987-10-23
GB2188771A (en) 1987-10-07
KR870010593A (en) 1987-11-30
DE3708687A1 (en) 1987-10-08
IT1202706B (en) 1989-02-09
KR950002566B1 (en) 1995-03-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee