GB351006A - Improvements in electron emitting cathodes - Google Patents

Improvements in electron emitting cathodes

Info

Publication number
GB351006A
GB351006A GB843830A GB843830A GB351006A GB 351006 A GB351006 A GB 351006A GB 843830 A GB843830 A GB 843830A GB 843830 A GB843830 A GB 843830A GB 351006 A GB351006 A GB 351006A
Authority
GB
United Kingdom
Prior art keywords
nickel
carbon
coatings
electron emitting
core
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
GB843830A
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.)
Q R S DE VRY CORP
Original Assignee
Q R S DE VRY CORP
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 Q R S DE VRY CORP filed Critical Q R S DE VRY CORP
Priority to GB843830A priority Critical patent/GB351006A/en
Publication of GB351006A publication Critical patent/GB351006A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Abstract

351,006. Thermionic cathodes. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Q. R. S.-De Vry Corporation; 333, North Michigan Avenue, Chicago, U.S.A.) March 15, 1930, No. 8438. [Class 39 (i).] Separate coatings of carbon and of an oxide or carbonate of an alkali or alkaline-earth metal are applied to the core which is heated to effect an appreciable conversion of the compound to a carbide. A nickel, platinum, or nickel-silicon core is coated first with graphite or soot and secondly with one or more of the oxides or carbonates of barium, strontium, or calcium. A further coating of carbon may be added. The coatings may be applied to the interior only of a hollow cathode.
GB843830A 1930-03-15 1930-03-15 Improvements in electron emitting cathodes Expired GB351006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB843830A GB351006A (en) 1930-03-15 1930-03-15 Improvements in electron emitting cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB843830A GB351006A (en) 1930-03-15 1930-03-15 Improvements in electron emitting cathodes

Publications (1)

Publication Number Publication Date
GB351006A true GB351006A (en) 1931-06-15

Family

ID=9852486

Family Applications (1)

Application Number Title Priority Date Filing Date
GB843830A Expired GB351006A (en) 1930-03-15 1930-03-15 Improvements in electron emitting cathodes

Country Status (1)

Country Link
GB (1) GB351006A (en)

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