GB309549A - Improvements in or relating to thermionic electrodes - Google Patents

Improvements in or relating to thermionic electrodes

Info

Publication number
GB309549A
GB309549A GB11228/29A GB1122829A GB309549A GB 309549 A GB309549 A GB 309549A GB 11228/29 A GB11228/29 A GB 11228/29A GB 1122829 A GB1122829 A GB 1122829A GB 309549 A GB309549 A GB 309549A
Authority
GB
United Kingdom
Prior art keywords
conductors
cathode
core
nickel
iron
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
GB11228/29A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB309549A publication Critical patent/GB309549A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microwave Tubes (AREA)
  • Powder Metallurgy (AREA)

Abstract

309,549. British Thomson-Houston Co., Ltd., (Assignees of Fitzpatrick, J. J.). April 12, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Addition to 303,381. Vacuum tubes; ,lowpressure metallic-vapour apparatus.-Destruction of the cathode of the parent Specification due to fusion arising from local heating is avoided by forming the filament with a core of high refractory material, such as molybdenum or tungsten, and covering this with a metal of the iron group, for example nickel or iron, to which an emissive coating is applied. The nickel &c. 13, 14, Figs. 2 and 3, is applied to a slug 11, 12 of the refractory metal which is then swaged to reduce the diameter and consolidate the core and shell. Fig. 1 shows a rectifier containing argon or mercury vapour and having a cathode 2 which is constructed according to the invention and supported by conductors 3, 4, anodes 5, 6 being carried by conductors 7, 8; the conductors are connected to plugs 9 and a base 10.
GB11228/29A 1927-12-31 1929-04-11 Improvements in or relating to thermionic electrodes Expired GB309549A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36344XA 1927-12-31 1927-12-31
US36344X 1928-04-12

Publications (1)

Publication Number Publication Date
GB309549A true GB309549A (en) 1930-02-27

Family

ID=26671991

Family Applications (2)

Application Number Title Priority Date Filing Date
GB38561/28A Expired GB303381A (en) 1927-12-31 1928-12-31 Improvements relating to thermionic cathodes
GB11228/29A Expired GB309549A (en) 1927-12-31 1929-04-11 Improvements in or relating to thermionic electrodes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB38561/28A Expired GB303381A (en) 1927-12-31 1928-12-31 Improvements relating to thermionic cathodes

Country Status (1)

Country Link
GB (2) GB303381A (en)

Also Published As

Publication number Publication date
GB303381A (en) 1930-06-02

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