GB489893A - Improvements in negative glow electric discharge lamps - Google Patents

Improvements in negative glow electric discharge lamps

Info

Publication number
GB489893A
GB489893A GB2037437A GB2037437A GB489893A GB 489893 A GB489893 A GB 489893A GB 2037437 A GB2037437 A GB 2037437A GB 2037437 A GB2037437 A GB 2037437A GB 489893 A GB489893 A GB 489893A
Authority
GB
United Kingdom
Prior art keywords
electric discharge
discharge lamps
negative glow
glow electric
coated
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
GB2037437A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to GB2037437A priority Critical patent/GB489893A/en
Publication of GB489893A publication Critical patent/GB489893A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes
    • H01J17/066—Cold cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H01J2893/0065—Electrode systems
    • H01J2893/0066—Construction, material, support, protection and temperature regulation of electrodes; Electrode cups

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

In a negative-glow electric discharge lamp, the parts of the cathode which are not to be covered by the glow are coated with a suspension or plastic mass which is dried and heated to form an insulating refractory ceramic material. An iron electrode may be coated with a mixture of zirconia and zircon sand which is heated to 1300 DEG C. The coating may form a pattern or may cover the whole of one side of the electrode.
GB2037437A 1937-07-22 1937-07-22 Improvements in negative glow electric discharge lamps Expired GB489893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2037437A GB489893A (en) 1937-07-22 1937-07-22 Improvements in negative glow electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2037437A GB489893A (en) 1937-07-22 1937-07-22 Improvements in negative glow electric discharge lamps

Publications (1)

Publication Number Publication Date
GB489893A true GB489893A (en) 1938-08-05

Family

ID=10144885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2037437A Expired GB489893A (en) 1937-07-22 1937-07-22 Improvements in negative glow electric discharge lamps

Country Status (1)

Country Link
GB (1) GB489893A (en)

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