GB424912A - Improvements in and relating to thermionic cathodes - Google Patents

Improvements in and relating to thermionic cathodes

Info

Publication number
GB424912A
GB424912A GB3358333A GB3358333A GB424912A GB 424912 A GB424912 A GB 424912A GB 3358333 A GB3358333 A GB 3358333A GB 3358333 A GB3358333 A GB 3358333A GB 424912 A GB424912 A GB 424912A
Authority
GB
United Kingdom
Prior art keywords
cathode
helix
thermionic cathodes
relating
heater
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
GB3358333A
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.)
GUTHRIE PHILIP EASTEN
Ferranti International PLC
Original Assignee
GUTHRIE PHILIP EASTEN
Ferranti PLC
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 GUTHRIE PHILIP EASTEN, Ferranti PLC filed Critical GUTHRIE PHILIP EASTEN
Priority to GB3358333A priority Critical patent/GB424912A/en
Publication of GB424912A publication Critical patent/GB424912A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details 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
    • H01J1/02Main electrodes
    • H01J1/13Solid thermionic cathodes
    • H01J1/20Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/22Heaters

Landscapes

  • Microwave Tubes (AREA)

Abstract

424,912. Thermionic cathodes. FERRANTI, Ltd., and EASTON, G. P., Hollinwood, Lancashire. Nov. 30, 1933, No. 33583. [Class 39 (i)] In an indirectly-heated cathode of circular crosssection, the heater comprises a plurality of separately insulated conductor wire lengths f which are held against the inner wall of the cathode a by suitable means leaving the inner space substantially unoccupied. The means may be a helix c or a thinwalled, optionally perforated, tube of nickel &c. Alternatively, plugs or cones may be inserted at each end of the cathode. The helix may be connected to the cathode at d or may act as a return lead for the heating current. If the cathode is closed at the top the helix c may be suspended therefrom. The heater wire may be formed into a fine helix before use.
GB3358333A 1933-11-30 1933-11-30 Improvements in and relating to thermionic cathodes Expired GB424912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3358333A GB424912A (en) 1933-11-30 1933-11-30 Improvements in and relating to thermionic cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3358333A GB424912A (en) 1933-11-30 1933-11-30 Improvements in and relating to thermionic cathodes

Publications (1)

Publication Number Publication Date
GB424912A true GB424912A (en) 1935-03-04

Family

ID=10354801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3358333A Expired GB424912A (en) 1933-11-30 1933-11-30 Improvements in and relating to thermionic cathodes

Country Status (1)

Country Link
GB (1) GB424912A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436907A (en) * 1945-06-23 1948-03-02 Nasa Indirectly heated cathode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436907A (en) * 1945-06-23 1948-03-02 Nasa Indirectly heated cathode

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