GB524240A - Improvements in or relating to cathodes for electron discharge devices - Google Patents

Improvements in or relating to cathodes for electron discharge devices

Info

Publication number
GB524240A
GB524240A GB2528/39A GB252839A GB524240A GB 524240 A GB524240 A GB 524240A GB 2528/39 A GB2528/39 A GB 2528/39A GB 252839 A GB252839 A GB 252839A GB 524240 A GB524240 A GB 524240A
Authority
GB
United Kingdom
Prior art keywords
disc
support
plate
sleeve
electron emitting
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
GB2528/39A
Other languages
English (en)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2528/39A priority Critical patent/GB524240A/en
Priority to US315375A priority patent/US2239416A/en
Priority to NL96951A priority patent/NL60423C/xx
Priority to FR864040D priority patent/FR864040A/fr
Publication of GB524240A publication Critical patent/GB524240A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/024—Electron guns using thermionic emission of cathode heated by electron or ion bombardment or by irradiation by other energetic beams, e.g. by laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Solid Thermionic Cathode (AREA)
  • X-Ray Techniques (AREA)
  • Electron Tubes For Measurement (AREA)
GB2528/39A 1939-01-25 1939-01-25 Improvements in or relating to cathodes for electron discharge devices Expired GB524240A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2528/39A GB524240A (en) 1939-01-25 1939-01-25 Improvements in or relating to cathodes for electron discharge devices
US315375A US2239416A (en) 1939-01-25 1940-01-24 Cathode for electron discharge devices
NL96951A NL60423C (zh) 1939-01-25 1940-02-16
FR864040D FR864040A (fr) 1939-01-25 1940-02-27 Perfectionnements apportés aux cathodes pour dispositifs à décharge électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2528/39A GB524240A (en) 1939-01-25 1939-01-25 Improvements in or relating to cathodes for electron discharge devices
GB1257939 1939-04-27

Publications (1)

Publication Number Publication Date
GB524240A true GB524240A (en) 1940-08-01

Family

ID=9741152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2528/39A Expired GB524240A (en) 1939-01-25 1939-01-25 Improvements in or relating to cathodes for electron discharge devices

Country Status (4)

Country Link
US (1) US2239416A (zh)
FR (1) FR864040A (zh)
GB (1) GB524240A (zh)
NL (1) NL60423C (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852685A (en) * 1945-01-26 1958-09-16 John R Tolmie Ion source for calutrons
US9251987B2 (en) 2012-09-14 2016-02-02 General Electric Company Emission surface for an X-ray device

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443324A (en) * 1942-11-07 1948-06-15 Charles Schiffman Electronic tube
US2423998A (en) * 1943-04-30 1947-07-15 Farnsworth Television & Radio Electron discharge device
GB624832A (en) * 1947-07-10 1949-06-16 Cinema Television Ltd Improvements in or relating to circuits for cathode ray tubes and methods of operating the same
US2552047A (en) * 1949-04-19 1951-05-08 Rca Corp Electron discharge device with temperature-stabilized cathode
US2635207A (en) * 1950-12-01 1953-04-14 Bell Telephone Labor Inc Electron discharge device of the cavity resonator type
US2928972A (en) * 1954-04-09 1960-03-15 Varian Associates Electron tube apparatus
US2815465A (en) * 1955-05-31 1957-12-03 Raytheon Mfg Co Heater assemblies for vacuum tubes
US2912616A (en) * 1956-02-07 1959-11-10 Itt Pulsed-cathode electron gun
US3441767A (en) * 1967-02-01 1969-04-29 Sylvania Electric Prod Tensioned directly heated cathode having improved temperature characteristics
US3777200A (en) * 1971-05-14 1973-12-04 Nasa High powered arc electrodes
WO2008047269A2 (en) * 2006-10-17 2008-04-24 Philips Intellectual Property & Standards Gmbh Emitter for x-ray tubes and heating method therefore
JP2010251718A (ja) * 2009-03-27 2010-11-04 Canon Anelva Corp 加熱装置の温度制御方法及び記憶媒体
CN211238153U (zh) 2020-03-20 2020-08-11 西门子爱克斯射线真空技术(无锡)有限公司 X射线管和x射线成像设备

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852685A (en) * 1945-01-26 1958-09-16 John R Tolmie Ion source for calutrons
US9251987B2 (en) 2012-09-14 2016-02-02 General Electric Company Emission surface for an X-ray device

Also Published As

Publication number Publication date
US2239416A (en) 1941-04-22
FR864040A (fr) 1941-04-22
NL60423C (zh) 1948-01-15

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