GB195440A - Improvements in electron discharge apparatus - Google Patents

Improvements in electron discharge apparatus

Info

Publication number
GB195440A
GB195440A GB3467221A GB3467221A GB195440A GB 195440 A GB195440 A GB 195440A GB 3467221 A GB3467221 A GB 3467221A GB 3467221 A GB3467221 A GB 3467221A GB 195440 A GB195440 A GB 195440A
Authority
GB
United Kingdom
Prior art keywords
cathode
electropositive
metal
discharge
anode
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
GB3467221A
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 GB3467221A priority Critical patent/GB195440A/en
Publication of GB195440A publication Critical patent/GB195440A/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
    • H01J1/14—Solid thermionic cathodes characterised by the material

Landscapes

  • Lasers (AREA)

Abstract

195,440. General Electric Co., Ltd., and Gossling, B. S. Dec. 23, 1921. Vacuum tubes. - In a device in which an electron discharge is obtained, independently of the presence of traces of gas, by means of a sufficiently steep potential gradient at the surface of the cathode, one or more cathodes are made of or coated with highly electropositive substances. Such a cathode may be produced by coating an anode of relatively electronegative material, for instance, nickel, with a salt of an electropositive metal, and passing a discharge between the anode and cathode in an exhausted container. The electropositive metal thereby liberated at the salt-vacuum surface can be released by evaporation, for instance, by means of a highvoltage discharge, the metal being deposited on the cathode. If a relatively volatile metal such as sodium is used, a rise in temperature of the cathode should be avoided. Thorium may 'be used as the electropositive substance. Specifications 155,554, 178,300, and 178,301 are referred to.
GB3467221A 1921-12-23 1921-12-23 Improvements in electron discharge apparatus Expired GB195440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3467221A GB195440A (en) 1921-12-23 1921-12-23 Improvements in electron discharge apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3467221A GB195440A (en) 1921-12-23 1921-12-23 Improvements in electron discharge apparatus

Publications (1)

Publication Number Publication Date
GB195440A true GB195440A (en) 1923-03-23

Family

ID=10368529

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3467221A Expired GB195440A (en) 1921-12-23 1921-12-23 Improvements in electron discharge apparatus

Country Status (1)

Country Link
GB (1) GB195440A (en)

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