GB517578A - Improvements in or relating to thermionic valves - Google Patents

Improvements in or relating to thermionic valves

Info

Publication number
GB517578A
GB517578A GB2268438A GB2268438A GB517578A GB 517578 A GB517578 A GB 517578A GB 2268438 A GB2268438 A GB 2268438A GB 2268438 A GB2268438 A GB 2268438A GB 517578 A GB517578 A GB 517578A
Authority
GB
United Kingdom
Prior art keywords
relating
valves
thermionic valves
cathode
thermionic
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
GB2268438A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB2268438A priority Critical patent/GB517578A/en
Publication of GB517578A publication Critical patent/GB517578A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • H01J21/06—Tubes with a single discharge path having electrostatic control means only
    • H01J21/10—Tubes with a single discharge path having electrostatic control means only with one or more immovable internal control electrodes, e.g. triode, pentode, octode
    • H01J21/14—Tubes with means for concentrating the electron stream, e.g. beam tetrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0029—Electron beam tubes

Landscapes

  • Electron Sources, Ion Sources (AREA)

Abstract

517,578. Thermionic valves. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and BRETT, G. F. July 29, 1938, No. 22684. [Class 39 (i)] In beam valves emission from the cathode C at X directly in line with the anode P is prevented either by removing the emissive surface or by arranging a negatively biassed mask at this area. The coating may be removed by providing during manufacture a filling of argon and causing ionic bombardment of the cathode during pumping.
GB2268438A 1938-07-29 1938-07-29 Improvements in or relating to thermionic valves Expired GB517578A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2268438A GB517578A (en) 1938-07-29 1938-07-29 Improvements in or relating to thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2268438A GB517578A (en) 1938-07-29 1938-07-29 Improvements in or relating to thermionic valves

Publications (1)

Publication Number Publication Date
GB517578A true GB517578A (en) 1940-02-02

Family

ID=10183433

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2268438A Expired GB517578A (en) 1938-07-29 1938-07-29 Improvements in or relating to thermionic valves

Country Status (1)

Country Link
GB (1) GB517578A (en)

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