GB1470318A - Cathode for electronic tube - Google Patents

Cathode for electronic tube

Info

Publication number
GB1470318A
GB1470318A GB2440374A GB2440374A GB1470318A GB 1470318 A GB1470318 A GB 1470318A GB 2440374 A GB2440374 A GB 2440374A GB 2440374 A GB2440374 A GB 2440374A GB 1470318 A GB1470318 A GB 1470318A
Authority
GB
United Kingdom
Prior art keywords
cathode
emitting
pot
june
triple
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
Application number
GB2440374A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1470318A publication Critical patent/GB1470318A/en
Expired 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
    • H01J1/26—Supports for the emissive material

Abstract

1470318 Cathode materials and processing PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 3 June 1974 [6 June 1973] 24403/74 Heading H1D A high current-density electron-emitting cathode comprises known emitting triple oxide (Ba, Sr, Ce) layer 2 formed from 7 : 6 : 1 w./w. triple carbonate adhering to a Ni support 1, formed by known powder metallurgy method using Mg and C added to carbonyl nickel. To improve adhesion, levels of Si, Al, Ti in the Ni are kept below 50 p.p.m. w./w. The cathode may be tubular with helical heater 3 as shown, or of "pot" formation, emitting from the base of a cylindrical cavity. Applications suggested are CRT's, travelling wave tubes and klystrons, and for the "pot" cathode high power amplifying tubes.
GB2440374A 1973-06-06 1974-06-03 Cathode for electronic tube Expired GB1470318A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7307855.A NL158647B (en) 1973-06-06 1973-06-06 OXYD CATHOD FOR AN ELECTRIC DISCHARGE TUBE.

Publications (1)

Publication Number Publication Date
GB1470318A true GB1470318A (en) 1977-04-14

Family

ID=19819020

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2440374A Expired GB1470318A (en) 1973-06-06 1974-06-03 Cathode for electronic tube

Country Status (9)

Country Link
US (1) US3911312A (en)
JP (1) JPS5621212B2 (en)
CA (1) CA1008914A (en)
DE (1) DE2425337C3 (en)
ES (1) ES426956A1 (en)
FR (1) FR2232833B1 (en)
GB (1) GB1470318A (en)
IT (1) IT1014280B (en)
NL (1) NL158647B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51115765A (en) * 1975-04-03 1976-10-12 Sony Corp Electron tube cathode apparatus
JPS5351798U (en) * 1976-10-02 1978-05-02
US7208864B2 (en) * 2002-07-24 2007-04-24 Thomson Licensing Oxide cathode for electron gun with a differentially doped metallic substrate
EP1385190A1 (en) * 2002-07-24 2004-01-28 Thomson Licensing S.A. Oxide cathode for electron gun with a differentially doped metallic substrate

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2179110A (en) * 1938-08-27 1939-11-07 Rca Corp Cathode for electron discharge devices
US2192491A (en) * 1939-02-01 1940-03-05 Rca Corp Cathode for electron discharge devices
FR1107589A (en) * 1954-06-18 1956-01-03 Csf Improvements to oxide cathode supports
FR1152810A (en) * 1955-06-29 1958-02-26 Philips Nv Oxide cathode and process for preparing nickel alloys for their bottom coating
NL101694C (en) * 1959-03-06
US3099577A (en) * 1960-08-24 1963-07-30 Philips Corp Method of manufacturing oxide cathodes and cathodes manufactured by such methods
GB1076229A (en) * 1963-10-08 1967-07-19 Sylvania Electric Prod Cathodes
US3351486A (en) * 1966-11-23 1967-11-07 Sylvania Electric Prod Cathodes

Also Published As

Publication number Publication date
CA1008914A (en) 1977-04-19
AU6971174A (en) 1975-12-04
JPS5621212B2 (en) 1981-05-18
US3911312A (en) 1975-10-07
FR2232833B1 (en) 1978-12-29
DE2425337C3 (en) 1981-06-25
JPS5023554A (en) 1975-03-13
IT1014280B (en) 1977-04-20
DE2425337A1 (en) 1975-01-02
FR2232833A1 (en) 1975-01-03
NL158647B (en) 1978-11-15
DE2425337B2 (en) 1978-04-27
NL7307855A (en) 1974-12-10
ES426956A1 (en) 1976-08-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee