GB731422A - Improvements in or relating to thermionic valves - Google Patents

Improvements in or relating to thermionic valves

Info

Publication number
GB731422A
GB731422A GB109651A GB109651A GB731422A GB 731422 A GB731422 A GB 731422A GB 109651 A GB109651 A GB 109651A GB 109651 A GB109651 A GB 109651A GB 731422 A GB731422 A GB 731422A
Authority
GB
United Kingdom
Prior art keywords
thorium
tungsten
cathode
carbide
magnetron
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
GB109651A
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.)
DONALD ARTHUR WRIGHT
MO Valve Co Ltd
Original Assignee
DONALD ARTHUR WRIGHT
MO Valve 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 DONALD ARTHUR WRIGHT, MO Valve Co Ltd filed Critical DONALD ARTHUR WRIGHT
Priority to GB109651A priority Critical patent/GB731422A/en
Publication of GB731422A publication Critical patent/GB731422A/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
    • H01J1/14—Solid thermionic cathodes characterised by the material

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

731,422. Cathode materials and processing. M-0 VALVE CO., Ltd., and WRIGHT, D. A. Jan. 2, 1952 [Jan. 15, 1951], No. 1096/51. Class 39 (1). Thorium carbide constitutes at least one half of the content of the electron -emissive substance. Tantalum, tungsten or molybdenum, which is roughened, carburized or coated with tungsten carbide or with a sintered layer of tungsten powder, is painted with a paste which consists of a specified mixture of thorium, carbon and a nitrocellulose binder and heated to 1900-2000‹ K. in vacuum or rare gas. The metal base can be coated by spraying or electrophoresis; the cathode can consist entirely of sintered thorium carbide and it is applicable to an amplifier, magnetron, modulator, rectifier, oscillator or demountable tube and can be heated directly or indirectly or by electron bombardment from an auxiliary cathode as in a magnetron. Operating temperatures and current emissions are specified. Specifications 240,560, [Class 39 (i)], and 731,421 are referred to.
GB109651A 1951-01-15 1951-01-15 Improvements in or relating to thermionic valves Expired GB731422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB109651A GB731422A (en) 1951-01-15 1951-01-15 Improvements in or relating to thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB109651A GB731422A (en) 1951-01-15 1951-01-15 Improvements in or relating to thermionic valves

Publications (1)

Publication Number Publication Date
GB731422A true GB731422A (en) 1955-06-08

Family

ID=9716081

Family Applications (1)

Application Number Title Priority Date Filing Date
GB109651A Expired GB731422A (en) 1951-01-15 1951-01-15 Improvements in or relating to thermionic valves

Country Status (1)

Country Link
GB (1) GB731422A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119565A (en) * 1982-04-23 1983-11-16 Raytheon Co Method of making a cathode electrode and product of such method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119565A (en) * 1982-04-23 1983-11-16 Raytheon Co Method of making a cathode electrode and product of such method

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