GB1263019A - Indirectly heated thermionic cathode - Google Patents

Indirectly heated thermionic cathode

Info

Publication number
GB1263019A
GB1263019A GB29391/70A GB2939170A GB1263019A GB 1263019 A GB1263019 A GB 1263019A GB 29391/70 A GB29391/70 A GB 29391/70A GB 2939170 A GB2939170 A GB 2939170A GB 1263019 A GB1263019 A GB 1263019A
Authority
GB
United Kingdom
Prior art keywords
cathode
indirectly heated
thermionic cathode
sleeve
cavity
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
GB29391/70A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1263019A publication Critical patent/GB1263019A/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
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode
    • 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
    • H01J1/24—Insulating layer or body located between heater and emissive material

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Spark Plugs (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

1,263,019. Thermionic cathode constructions. LICENTIA PATENT VERWALTUNGS G.m.b.H. 17 June, 1970 [1 July, 1969], No. 29391/70. Heading H1D. An indirectly heated cathode comprises a heating element 1 mounted in a cavity within the cathode 3 and a pink ruby sleeve 2 lining the cavity. In a dispenser cathode the sleeve may have an opening adjacent the emissive material 4 which is closed by a cover of sapphire, ruby or quartz. The heating element comprises a multiple coil with a coating of Al oxide.
GB29391/70A 1969-07-01 1970-06-17 Indirectly heated thermionic cathode Expired GB1263019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691933309 DE1933309B2 (en) 1969-07-01 1969-07-01 INDIRECTLY HEATED GLOW CATHODE

Publications (1)

Publication Number Publication Date
GB1263019A true GB1263019A (en) 1972-02-09

Family

ID=5738522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29391/70A Expired GB1263019A (en) 1969-07-01 1970-06-17 Indirectly heated thermionic cathode

Country Status (4)

Country Link
US (1) US3652894A (en)
DE (1) DE1933309B2 (en)
FR (1) FR2056453A5 (en)
GB (1) GB1263019A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5752100A (en) * 1996-01-26 1998-05-12 Eastman Kodak Company Driver circuit for a camera autofocus laser diode with provision for fault protection
JP2004221010A (en) * 2003-01-17 2004-08-05 Matsushita Electric Ind Co Ltd Cathode structure, electron gun, and cathode-ray tube
US20080196450A1 (en) * 2007-02-21 2008-08-21 Nippon Telegraph And Telephone Corporation Coated optical fiber endface preparation method and tool
WO2008157413A1 (en) * 2007-06-13 2008-12-24 Aerojet- General Corporation Cathode heater

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1878089A (en) * 1926-06-19 1932-09-20 Rca Corp Electron emitting device
US2227017A (en) * 1936-03-12 1940-12-31 Loewe Radio Inc Hot cathode for cathode ray tubes
US2817784A (en) * 1951-01-31 1957-12-24 Siemens Ag Cathode for use in electrical discharge devices
NL84125C (en) * 1951-10-13
DE1090774B (en) * 1959-03-20 1960-10-13 Siemens Ag Heating element for indirectly heated cathodes and process for the production of an insulating coating
US3160780A (en) * 1961-01-17 1964-12-08 Philips Corp Indirectly heated cathode

Also Published As

Publication number Publication date
DE1933309A1 (en) 1971-02-04
DE1933309B2 (en) 1971-05-06
US3652894A (en) 1972-03-28
FR2056453A5 (en) 1971-05-14

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