GB276703A - Improvements in or relating to thermionic valves - Google Patents

Improvements in or relating to thermionic valves

Info

Publication number
GB276703A
GB276703A GB1122026A GB1122026A GB276703A GB 276703 A GB276703 A GB 276703A GB 1122026 A GB1122026 A GB 1122026A GB 1122026 A GB1122026 A GB 1122026A GB 276703 A GB276703 A GB 276703A
Authority
GB
United Kingdom
Prior art keywords
length
less
emitting surface
anode
potential drop
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
GB1122026A
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.)
THOMAS WILLIS PRICE
Edison Swan Electric Co Ltd
Original Assignee
THOMAS WILLIS PRICE
Edison Swan Electric 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 THOMAS WILLIS PRICE, Edison Swan Electric Co Ltd filed Critical THOMAS WILLIS PRICE
Priority to GB1122026A priority Critical patent/GB276703A/en
Publication of GB276703A publication Critical patent/GB276703A/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
    • H01J1/15—Cathodes heated directly by an electric current

Landscapes

  • Cold Cathode And The Manufacture (AREA)

Abstract

276,703. Edison Swan Electric Co., Ltd., Soundy, L. H., and Price, T. W. April 28, 1926. Drawings to Specification. Vacuum tubes.-The electron-emitting surface of a cathode is confined to a small area such that the potential drop across the surface is less than one tenth of a volt and less than 1/500 of the potential drop between the surface and the anode. For instance, a spot of calcium or strontium oxide may be applied to a platinum filament, the length of the emitting surface being less than one-tenth of the length of the filament. The anode is of cylindrical or flattened cylindrical form, and its length is many times greater than that of the emitting surface. One or more control electrodes are provided. The valve gives a characteristic with a sharp bend.
GB1122026A 1926-04-28 1926-04-28 Improvements in or relating to thermionic valves Expired GB276703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1122026A GB276703A (en) 1926-04-28 1926-04-28 Improvements in or relating to thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1122026A GB276703A (en) 1926-04-28 1926-04-28 Improvements in or relating to thermionic valves

Publications (1)

Publication Number Publication Date
GB276703A true GB276703A (en) 1927-08-29

Family

ID=9982207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1122026A Expired GB276703A (en) 1926-04-28 1926-04-28 Improvements in or relating to thermionic valves

Country Status (1)

Country Link
GB (1) GB276703A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE738936C (en) * 1931-08-20 1944-04-19 Aeg Incandescent cathode, especially for X-ray tubes, Braun tubes
US2707771A (en) * 1946-07-05 1955-05-03 Sylvania Electric Prod Electron discharge device of the dynatron oscillator type

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE738936C (en) * 1931-08-20 1944-04-19 Aeg Incandescent cathode, especially for X-ray tubes, Braun tubes
US2707771A (en) * 1946-07-05 1955-05-03 Sylvania Electric Prod Electron discharge device of the dynatron oscillator type

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