GB421848A - Improvements in or relating to electric discharge devices - Google Patents

Improvements in or relating to electric discharge devices

Info

Publication number
GB421848A
GB421848A GB2958933A GB2958933A GB421848A GB 421848 A GB421848 A GB 421848A GB 2958933 A GB2958933 A GB 2958933A GB 2958933 A GB2958933 A GB 2958933A GB 421848 A GB421848 A GB 421848A
Authority
GB
United Kingdom
Prior art keywords
envelope
alumina
rod
insulating refractory
discharge devices
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
GB2958933A
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 PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2958933A priority Critical patent/GB421848A/en
Publication of GB421848A publication Critical patent/GB421848A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/42—Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
    • H01J19/48—Mountings for individual electrodes

Landscapes

  • Microwave Tubes (AREA)

Abstract

421,848. Thermionic cathodes. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and LE ROSSIGNOL, R., c/o General Electric Co., Wembley, Middlesex. Oct. 25, 1933, No. 29589. [Class 39 (i)] In electric discharge devices of the type comprising a vitreous envelope and a thermionic cathode of which a body of insulating refractory material forms a structurally essential part, the insulating refractory body is supported within the vitreous envelope by sealing part of it into the envelope, or into a portion projecting therefrom. The example shows an indirectly heated cathode wherein the insulating refractory body consists of a rod 1 of alumina upon one end of which a tungsten resistance wire is wound, and then sprayed with a suspension of alumina. A nickel tube 4 placed over the rod is connected to a leading-in wire 5 and coated with a mixture of materials which, when heated, produce a mixture of barium and strontium oxide. The entire structure is supported within the envelope by sealing the other end of alumina rod into the pinch 6. Specification 244,196, [Class 39 (i)], is referred to.
GB2958933A 1933-10-25 1933-10-25 Improvements in or relating to electric discharge devices Expired GB421848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2958933A GB421848A (en) 1933-10-25 1933-10-25 Improvements in or relating to electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2958933A GB421848A (en) 1933-10-25 1933-10-25 Improvements in or relating to electric discharge devices

Publications (1)

Publication Number Publication Date
GB421848A true GB421848A (en) 1935-01-01

Family

ID=10293912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2958933A Expired GB421848A (en) 1933-10-25 1933-10-25 Improvements in or relating to electric discharge devices

Country Status (1)

Country Link
GB (1) GB421848A (en)

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