GB778796A - Improvements relating to cathode structures for electrical discharge devices - Google Patents

Improvements relating to cathode structures for electrical discharge devices

Info

Publication number
GB778796A
GB778796A GB30117/55A GB3011755A GB778796A GB 778796 A GB778796 A GB 778796A GB 30117/55 A GB30117/55 A GB 30117/55A GB 3011755 A GB3011755 A GB 3011755A GB 778796 A GB778796 A GB 778796A
Authority
GB
United Kingdom
Prior art keywords
disc
cathode
electrical discharge
filaments
improvements relating
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
GB30117/55A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB778796A publication Critical patent/GB778796A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Microwave Tubes (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

778,796. Thermionic cathode constructions. GENERAL ELECTRIC CO. Oct. 21, 1955 [Oct. 22, 1954], No. 30117/55. Class 39(1). A number of heated filaments 12 are stretched across an aperture 11 in a disc 10 and connection 13 is made to intermediate points of the filaments within the aperture. By applying heating voltage between the central lead 14 and the disc 10 a largely non-inductive current distribution is obtained. The disc 10 may be fitted into the end of a cylindrical support member. As shown, the filaments form a directly-heated cathode but they may be the heaters of an indirectlyheated cathode. Specification 755,985 is referred to.
GB30117/55A 1954-10-22 1955-10-21 Improvements relating to cathode structures for electrical discharge devices Expired GB778796A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US463849A US2892120A (en) 1954-10-22 1954-10-22 Cathode structure

Publications (1)

Publication Number Publication Date
GB778796A true GB778796A (en) 1957-07-10

Family

ID=23841560

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30117/55A Expired GB778796A (en) 1954-10-22 1955-10-21 Improvements relating to cathode structures for electrical discharge devices

Country Status (4)

Country Link
US (1) US2892120A (en)
DE (1) DE1034779B (en)
FR (1) FR1137650A (en)
GB (1) GB778796A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5686791A (en) * 1992-03-16 1997-11-11 Microelectronics And Computer Technology Corp. Amorphic diamond film flat field emission cathode

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US241366A (en) * 1881-05-10 hussey
US1353976A (en) * 1916-03-20 1920-09-28 Western Electric Co Vacuum-tube device
US1844319A (en) * 1929-09-25 1932-02-09 Hatt Emil Means for producing radio waves
US1969496A (en) * 1931-03-12 1934-08-07 Bell Telephone Labor Inc Electric discharge device
AT135875B (en) * 1932-05-17 1933-12-11 Kremenezky Ag Joh Device for the production of hot cathodes.
US2117709A (en) * 1936-12-30 1938-05-17 Bell Telephone Labor Inc Electron discharge device
BE473991A (en) * 1941-06-24
FR901727A (en) * 1942-05-19 1945-08-03 Gema Ges Fu R Elektroakustisch Incandescent cathode for electronic lamp
FR978463A (en) * 1942-09-14 1951-04-13 Csf Direct heated cathode for velocity modulated tube
US2458693A (en) * 1946-01-25 1949-01-11 Eitel Mccullough Inc Electron tube

Also Published As

Publication number Publication date
US2892120A (en) 1959-06-23
FR1137650A (en) 1957-05-31
DE1034779B (en) 1958-07-24

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