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GB236615A - Improvements in cathodes for vacuum electric devices - Google Patents

Improvements in cathodes for vacuum electric devices

Info

Publication number
GB236615A
GB236615A GB775824A GB775824A GB236615A GB 236615 A GB236615 A GB 236615A GB 775824 A GB775824 A GB 775824A GB 775824 A GB775824 A GB 775824A GB 236615 A GB236615 A GB 236615A
Authority
GB
United Kingdom
Prior art keywords
platinum
coating
deposited
nickel
solution
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
GB775824A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB775824A priority Critical patent/GB236615A/en
Publication of GB236615A publication Critical patent/GB236615A/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

  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

236,615. Robinson, E. Y. March 26, 1924. Electrodes; treating after deposition; metals and alloys, depositing.-Platinum, an alloy, or nickel is deposited by electrolysis on tubular or sheet tungsten or molybdenum as a coating to which an electron emitting coating may be applied subsequently. A solution of platinum chloride containing citric acid may be used; or platinum black may be deposited from a 3 per cent solution of platinum chloride with 0.02 per cent of lead acetate. The core is dried and heated to the melting point of platinum to produce an adherent coating. Nickel may be deposited from a solution of nickel sulphate containing magnesium sulphate and boric acid. An oxide coating is applied subsequently to the composite core. According to the Provisional Specification a filament may be coated by similar processes.
GB775824A 1924-03-26 1924-03-26 Improvements in cathodes for vacuum electric devices Expired GB236615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB775824A GB236615A (en) 1924-03-26 1924-03-26 Improvements in cathodes for vacuum electric devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB775824A GB236615A (en) 1924-03-26 1924-03-26 Improvements in cathodes for vacuum electric devices

Publications (1)

Publication Number Publication Date
GB236615A true GB236615A (en) 1925-06-26

Family

ID=9839147

Family Applications (1)

Application Number Title Priority Date Filing Date
GB775824A Expired GB236615A (en) 1924-03-26 1924-03-26 Improvements in cathodes for vacuum electric devices

Country Status (1)

Country Link
GB (1) GB236615A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE751158C (en) * 1936-12-31 1952-10-06 Rca Corp Directly heated band-shaped cathode for discharge tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE751158C (en) * 1936-12-31 1952-10-06 Rca Corp Directly heated band-shaped cathode for discharge tubes

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