GB1141415A - Improvements in or relating to thermionic filaments - Google Patents

Improvements in or relating to thermionic filaments

Info

Publication number
GB1141415A
GB1141415A GB4133167A GB4133167A GB1141415A GB 1141415 A GB1141415 A GB 1141415A GB 4133167 A GB4133167 A GB 4133167A GB 4133167 A GB4133167 A GB 4133167A GB 1141415 A GB1141415 A GB 1141415A
Authority
GB
United Kingdom
Prior art keywords
emissive
lead
wire
filament
conductor
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
GB4133167A
Inventor
Geoffrey Maximillian Claridge
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.)
M E L EQUIPMENT CO Ltd
Original Assignee
M E L EQUIPMENT CO 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 M E L EQUIPMENT CO Ltd filed Critical M E L EQUIPMENT CO Ltd
Priority to GB4133167A priority Critical patent/GB1141415A/en
Priority to NL6812814A priority patent/NL6812814A/xx
Priority to BE720578D priority patent/BE720578A/xx
Priority to FR1597524D priority patent/FR1597524A/fr
Publication of GB1141415A publication Critical patent/GB1141415A/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

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Microwave Tubes (AREA)

Abstract

1,141,415. Thermionic cathode constructions. M.E.L. EQUIPMENT CO. Ltd. 11 Sept., 1967, No. 41331/67. Heading H1D. Cooling of the end of the emissive portion of a directly heated filament by heat conduction along a lead-in wire is prevented by providing a non-emissive filament portion between the emissive portion and the lead-in wire. In Fig. 1 the emissive portion 1 is a flat spiral which is joined at one end to a helical wire 3 connected to a lead-in conductor (not shown) and at the other end to a second helical wire 5 connected to a second lead-in conductor (not shown). The filament may be of tungsten wire coated at the emissive portions with alkaline earth oxides, and is suitable for use in an electron gun, e.g. for a linear accelerator.
GB4133167A 1967-09-11 1967-09-11 Improvements in or relating to thermionic filaments Expired GB1141415A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB4133167A GB1141415A (en) 1967-09-11 1967-09-11 Improvements in or relating to thermionic filaments
NL6812814A NL6812814A (en) 1967-09-11 1968-09-07
BE720578D BE720578A (en) 1967-09-11 1968-09-09
FR1597524D FR1597524A (en) 1967-09-11 1968-09-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4133167A GB1141415A (en) 1967-09-11 1967-09-11 Improvements in or relating to thermionic filaments

Publications (1)

Publication Number Publication Date
GB1141415A true GB1141415A (en) 1969-01-29

Family

ID=10419195

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4133167A Expired GB1141415A (en) 1967-09-11 1967-09-11 Improvements in or relating to thermionic filaments

Country Status (4)

Country Link
BE (1) BE720578A (en)
FR (1) FR1597524A (en)
GB (1) GB1141415A (en)
NL (1) NL6812814A (en)

Also Published As

Publication number Publication date
FR1597524A (en) 1970-06-29
BE720578A (en) 1969-03-10
NL6812814A (en) 1969-03-13

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