GB275449A - Improvements in or relating to incandescent cathodes - Google Patents

Improvements in or relating to incandescent cathodes

Info

Publication number
GB275449A
GB275449A GB2691326A GB2691326A GB275449A GB 275449 A GB275449 A GB 275449A GB 2691326 A GB2691326 A GB 2691326A GB 2691326 A GB2691326 A GB 2691326A GB 275449 A GB275449 A GB 275449A
Authority
GB
United Kingdom
Prior art keywords
relating
nickel
incandescent cathodes
cathodes
incandescent
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
GB2691326A
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 GB275449A publication Critical patent/GB275449A/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
    • H01J1/15—Cathodes heated directly by an electric current

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)

Abstract

275,449. Wade, H., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Oct. 27, 1926. Addition to 274,981. Drawings to Specification. Vacuum tubes.-In a cathode according to the parent Specification the helically-wound wire consists of nickel. The adjacent turns of the helix may be in contact or spaced apart. A layer of copper oxide may be interposed between the nickel and the alkaline-earth oxide.
GB2691326A 1926-05-06 1926-10-27 Improvements in or relating to incandescent cathodes Expired GB275449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1188826A GB274981A (en) 1926-05-06 1926-05-06 Improvements in or relating to oxide cathodes

Publications (1)

Publication Number Publication Date
GB275449A true GB275449A (en) 1927-08-11

Family

ID=9994500

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1188826A Expired GB274981A (en) 1926-05-06 1926-05-06 Improvements in or relating to oxide cathodes
GB2691326A Expired GB275449A (en) 1926-05-06 1926-10-27 Improvements in or relating to incandescent cathodes

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1188826A Expired GB274981A (en) 1926-05-06 1926-05-06 Improvements in or relating to oxide cathodes

Country Status (1)

Country Link
GB (2) GB274981A (en)

Also Published As

Publication number Publication date
GB274981A (en) 1927-08-04

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