GB450865A - Improvements in or relating to cathode structures for use in cathode ray tubes - Google Patents

Improvements in or relating to cathode structures for use in cathode ray tubes

Info

Publication number
GB450865A
GB450865A GB2401/35A GB240135A GB450865A GB 450865 A GB450865 A GB 450865A GB 2401/35 A GB2401/35 A GB 2401/35A GB 240135 A GB240135 A GB 240135A GB 450865 A GB450865 A GB 450865A
Authority
GB
United Kingdom
Prior art keywords
cathode
ray tubes
relating
structures
cathode ray
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
GB2401/35A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB450865A publication Critical patent/GB450865A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • 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

  • Discharge Lamp (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

Electron-emissive bodies for cathodes of cathode-ray tubes are made by sintering a mixture of metal powder and emissive material, preferably 20 per cent of tungsten and 80 per cent of barium oxide, by heating in a discharge in neon at ,1-10 mm. pressure.
GB2401/35A 1934-01-27 1935-01-24 Improvements in or relating to cathode structures for use in cathode ray tubes Expired GB450865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE450865X 1934-01-27

Publications (1)

Publication Number Publication Date
GB450865A true GB450865A (en) 1936-07-24

Family

ID=6538452

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2401/35A Expired GB450865A (en) 1934-01-27 1935-01-24 Improvements in or relating to cathode structures for use in cathode ray tubes

Country Status (2)

Country Link
FR (1) FR785265A (en)
GB (1) GB450865A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2279495A (en) * 1993-06-22 1995-01-04 Thorn Microwave Devices Limite Thermionic cathode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2279495A (en) * 1993-06-22 1995-01-04 Thorn Microwave Devices Limite Thermionic cathode
US5507675A (en) * 1993-06-22 1996-04-16 Thorn Microwave Devices Limited Method of manufacturing a thermionic cathode structure

Also Published As

Publication number Publication date
FR785265A (en) 1935-08-06

Similar Documents

Publication Publication Date Title
GB648955A (en) Improvements in electron-emitting electrodes for electric discharge tubes
ES206484A1 (en) Cathode containing a supply of an electron-emissive material
GB450865A (en) Improvements in or relating to cathode structures for use in cathode ray tubes
GB484548A (en) Improvements in incandescent electrodes for electric discharge tubes
GB396514A (en) Improvements relating to electron emitters and to the manufacture of the same
GB611933A (en) Improved method of manufacturing indirectly heated cathodes
GB494651A (en) Improvements in electron discharge devices used as voltage indicators
GB539897A (en) Improvements in or relating to electron discharge devices
GB444775A (en) Improvements in and relating to cathode ray tubes
GB516455A (en) Improvements relating to cathode ray tubes
GB459163A (en) Improvements in and relating to electric discharge tubes
GB445820A (en) Improvements in the manufacture of cathode ray tubes
GB486502A (en) Improvements in and relating to metallic vapour discharge lamps
GB436712A (en) Improvements in or relating to indirectly heated cathode structures and electron discharge devices incorporating the same
GB441787A (en) Improvements in electrodes
AU107512B2 (en) Improvements in or relating tothe control of secondary emission fromthe scanned electrode in electron discharge tube arrangements
GB482168A (en) Improvement in secondary electron emission electrode
GB395660A (en) Improvements in and relating to electric discharge devices
GB479920A (en) Improvements in and relating to electric discharge devices
GB357632A (en) Low temperature emissive cathodes for electric discharge devices
AU215538A (en) Improvements in or relating tothe control of secondary emission fromthe scanned electrode in electron discharge tube arrangements
GB277997A (en)
GB389795A (en) Improvements in and relating to self-heating cathodes for electric discharge tubes
GB451989A (en) Improvements in thermionic electrodes
GB269032A (en) Improvements in or relating to thermionic valves