GB450788A - Process for coating articles such as electrodes and other parts of electric discharge tubes - Google Patents

Process for coating articles such as electrodes and other parts of electric discharge tubes

Info

Publication number
GB450788A
GB450788A GB16806/35A GB1680635A GB450788A GB 450788 A GB450788 A GB 450788A GB 16806/35 A GB16806/35 A GB 16806/35A GB 1680635 A GB1680635 A GB 1680635A GB 450788 A GB450788 A GB 450788A
Authority
GB
United Kingdom
Prior art keywords
electrodes
parts
discharge tubes
electric discharge
coating articles
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
GB16806/35A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB450788A publication Critical patent/GB450788A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/0022—Manufacture
    • H01J2893/0023—Manufacture carbonising and other surface treatments

Abstract

Electrodes and other parts of discharge tubes and other radiating bodies are blackened by electrophoretic deposition from a colloidal solution of graphite, active carbon or other substance or of a substance which may be rendered black by further treatment. In an example tungsten oxide is deposited and is subsequently reduced in hydrogen to produce a black tungsten coating.
GB16806/35A 1934-06-20 1935-06-11 Process for coating articles such as electrodes and other parts of electric discharge tubes Expired GB450788A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU450788X 1934-06-20

Publications (1)

Publication Number Publication Date
GB450788A true GB450788A (en) 1936-07-24

Family

ID=10979205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16806/35A Expired GB450788A (en) 1934-06-20 1935-06-11 Process for coating articles such as electrodes and other parts of electric discharge tubes

Country Status (1)

Country Link
GB (1) GB450788A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457651A (en) * 1946-03-18 1948-12-28 Eitel Mccullough Inc Electron tube and method of making the same
US3037923A (en) * 1957-12-26 1962-06-05 Sylvania Electric Prod Process for electrophoretically coating a metal with particulate carbon material
US3493482A (en) * 1968-07-23 1970-02-03 Ppg Industries Inc Use of coal in electrodepositable compositions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457651A (en) * 1946-03-18 1948-12-28 Eitel Mccullough Inc Electron tube and method of making the same
US3037923A (en) * 1957-12-26 1962-06-05 Sylvania Electric Prod Process for electrophoretically coating a metal with particulate carbon material
US3493482A (en) * 1968-07-23 1970-02-03 Ppg Industries Inc Use of coal in electrodepositable compositions

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