GB241216A - Improvements in and relating to electron discharge apparatus - Google Patents

Improvements in and relating to electron discharge apparatus

Info

Publication number
GB241216A
GB241216A GB25248/25A GB2524825A GB241216A GB 241216 A GB241216 A GB 241216A GB 25248/25 A GB25248/25 A GB 25248/25A GB 2524825 A GB2524825 A GB 2524825A GB 241216 A GB241216 A GB 241216A
Authority
GB
United Kingdom
Prior art keywords
grid
anode
roughened
relating
filament
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
GB25248/25A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB241216A publication Critical patent/GB241216A/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

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

241,216. British Thomson-Houston Co., Ltd., (Assignees of Mullaney, D. A.).. Oct. 9, 1924, ,date]. Vacuum tubes. - To increase the heat-radiating capacity of an electrode such as an anode or grid, it is roughened either by sand-blasting or the like, or by superficial oxidation followed by reduction. In the case of a grid, the treatment also diminishes the emission of secondary electrons. Fig. 1 shows a roughened anode 13 in close proximity to a filament-cathode 11, with a grid 12 interposed. In another valve the anode and grid consist of alternate slats arranged radially about a straight filament; in the drawing, each is shown with a right-angled extension at its outer edge.
GB25248/25A 1924-10-09 1925-10-09 Improvements in and relating to electron discharge apparatus Expired GB241216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US241216XA 1924-10-09 1924-10-09

Publications (1)

Publication Number Publication Date
GB241216A true GB241216A (en) 1926-03-11

Family

ID=21818971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25248/25A Expired GB241216A (en) 1924-10-09 1925-10-09 Improvements in and relating to electron discharge apparatus

Country Status (1)

Country Link
GB (1) GB241216A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE847629C (en) * 1933-02-22 1952-08-25 Baker & Co Electron tubes with perforated sheet metal electrode and electrodes for it
US5216938A (en) * 1990-03-28 1993-06-08 Nissan Control apparatus with fail-safe faculty

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE847629C (en) * 1933-02-22 1952-08-25 Baker & Co Electron tubes with perforated sheet metal electrode and electrodes for it
US5216938A (en) * 1990-03-28 1993-06-08 Nissan Control apparatus with fail-safe faculty

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