GB891913A - Thermionic valve cathode - Google Patents

Thermionic valve cathode

Info

Publication number
GB891913A
GB891913A GB3015559A GB3015559A GB891913A GB 891913 A GB891913 A GB 891913A GB 3015559 A GB3015559 A GB 3015559A GB 3015559 A GB3015559 A GB 3015559A GB 891913 A GB891913 A GB 891913A
Authority
GB
United Kingdom
Prior art keywords
wire
mandrel
cathode
round
thermionic valve
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
GB3015559A
Inventor
Frederick William Rodba Farrow
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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
Priority to NL255493D priority Critical patent/NL255493A/xx
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3015559A priority patent/GB891913A/en
Priority to FR837703A priority patent/FR1266434A/en
Publication of GB891913A publication Critical patent/GB891913A/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
    • H01J1/22—Heaters

Landscapes

  • Microwave Tubes (AREA)
  • Resistance Heating (AREA)

Abstract

891,913. Cathode heaters. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 25, 1960 [Sept. 3, 1959], No. 30155/59. Class 39(3) [Also in Group XL(a)] A cathode heated wire is wound helically round an insulated, tensioned wire 4. As shown, the heater wire 12 is in the form of a coiled coil, formed by winding wire helically round a molybdenum mandrel, which helix is then wound round the wire 4 or a further mandrel before dissolving out the first mandrel. An alumina coating on the tensioned wire 4 and on the heater wire 12 may be applied by cataphoresis.
GB3015559A 1959-09-03 1959-09-03 Thermionic valve cathode Expired GB891913A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL255493D NL255493A (en) 1959-09-03
GB3015559A GB891913A (en) 1959-09-03 1959-09-03 Thermionic valve cathode
FR837703A FR1266434A (en) 1959-09-03 1960-09-02 Thermionic tube cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3015559A GB891913A (en) 1959-09-03 1959-09-03 Thermionic valve cathode

Publications (1)

Publication Number Publication Date
GB891913A true GB891913A (en) 1962-03-21

Family

ID=10303184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3015559A Expired GB891913A (en) 1959-09-03 1959-09-03 Thermionic valve cathode

Country Status (2)

Country Link
GB (1) GB891913A (en)
NL (1) NL255493A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143949A (en) * 1983-07-26 1985-02-20 Boc Group Plc Filament support
GB2171247A (en) * 1984-12-26 1986-08-20 Hitachi Ltd Heater for indirect-heated cathode

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143949A (en) * 1983-07-26 1985-02-20 Boc Group Plc Filament support
GB2171247A (en) * 1984-12-26 1986-08-20 Hitachi Ltd Heater for indirect-heated cathode
US4745325A (en) * 1984-12-26 1988-05-17 Hitachi, Ltd. Heater for indirect-heated cathode

Also Published As

Publication number Publication date
NL255493A (en)

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