GB345949A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB345949A
GB345949A GB3974129A GB3974129A GB345949A GB 345949 A GB345949 A GB 345949A GB 3974129 A GB3974129 A GB 3974129A GB 3974129 A GB3974129 A GB 3974129A GB 345949 A GB345949 A GB 345949A
Authority
GB
United Kingdom
Prior art keywords
relating
discharge devices
electron discharge
bar
coveney
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
GB3974129A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3974129A priority Critical patent/GB345949A/en
Publication of GB345949A publication Critical patent/GB345949A/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
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/38—Control electrodes, e.g. grid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0015—Non-sealed electrodes

Landscapes

  • Electroplating Methods And Accessories (AREA)
  • Windings For Motors And Generators (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

345,949. Electrolysis. STANDARD TELEPHONES & CABLES, Ltd., COVENEY, D. G., and BENHAM, W. E., Columbia House, Aldwych, London. Dec. 30, 1929, No. 39741. Drawings to Specification. [Class 41.] A grid for a thermionic valve is formed by electroplating a bar of conducting material having sections of insulating material, the bar being removed subsequently.
GB3974129A 1929-12-30 1929-12-30 Improvements in or relating to electron discharge devices Expired GB345949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3974129A GB345949A (en) 1929-12-30 1929-12-30 Improvements in or relating to electron discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3974129A GB345949A (en) 1929-12-30 1929-12-30 Improvements in or relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB345949A true GB345949A (en) 1931-03-30

Family

ID=10411215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3974129A Expired GB345949A (en) 1929-12-30 1929-12-30 Improvements in or relating to electron discharge devices

Country Status (1)

Country Link
GB (1) GB345949A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416799A (en) * 1942-08-04 1947-03-04 Western Electric Co Electron discharge device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416799A (en) * 1942-08-04 1947-03-04 Western Electric Co Electron discharge device

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