GB439058A - Improvements in method of treating a graphite body - Google Patents

Improvements in method of treating a graphite body

Info

Publication number
GB439058A
GB439058A GB16503/34A GB1650334A GB439058A GB 439058 A GB439058 A GB 439058A GB 16503/34 A GB16503/34 A GB 16503/34A GB 1650334 A GB1650334 A GB 1650334A GB 439058 A GB439058 A GB 439058A
Authority
GB
United Kingdom
Prior art keywords
graphitized
graphite
heated
graphite body
treating
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
GB16503/34A
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.)
Hygrade Sylvania Corp
Original Assignee
Hygrade Sylvania 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 Hygrade Sylvania Corp filed Critical Hygrade Sylvania Corp
Publication of GB439058A publication Critical patent/GB439058A/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
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/385—Exhausting vessels
    • 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
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
    • 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
    • H01J2893/002—Chemical composition and manufacture chemical
    • H01J2893/0021—Chemical composition and manufacture chemical carbon

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

A graphite body, e.g. an electrode of an electric discharge device, is heated in an oxidizing atmosphere to a glowing temperature until all non-graphitized carbonaceous materials such as hydrocarbons, are removed. Lamp black or amorphous carbon may be mixed with a suitable binder and graphitized by means of the Acheson process. The graphite may then be pressed to the desired shape and heated in air to 1200 DEG C. by means of induced high-frequency currents, or by the passage of an electric current therethrough, or by the use of an electric resistance or gas-fired muffle furnace. The body is surrounded by a blue glow during the treatment, and emits incandescent particles when all non-graphitized material is removed.
GB16503/34A 1933-06-02 1934-06-02 Improvements in method of treating a graphite body Expired GB439058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US439058XA 1933-06-02 1933-06-02

Publications (1)

Publication Number Publication Date
GB439058A true GB439058A (en) 1935-11-28

Family

ID=21929512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16503/34A Expired GB439058A (en) 1933-06-02 1934-06-02 Improvements in method of treating a graphite body

Country Status (2)

Country Link
DE (1) DE666635C (en)
GB (1) GB439058A (en)

Also Published As

Publication number Publication date
DE666635C (en) 1938-10-24

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