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GB422694A - Improvements in oxide cathodes more particularly for gasfilled discharged tubes - Google Patents

Improvements in oxide cathodes more particularly for gasfilled discharged tubes

Info

Publication number
GB422694A
GB422694A GB25342/34A GB2534234A GB422694A GB 422694 A GB422694 A GB 422694A GB 25342/34 A GB25342/34 A GB 25342/34A GB 2534234 A GB2534234 A GB 2534234A GB 422694 A GB422694 A GB 422694A
Authority
GB
United Kingdom
Prior art keywords
wire
helices
sept
gasfilled
oxide
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
GB25342/34A
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.)
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 GB422694A publication Critical patent/GB422694A/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

Landscapes

  • Discharge Lamp (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

422,694. Thermionic cathodes. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Sept. 3, 1934, No. 25342. Convention date, Sept. 14, 1933. Drawings to Specification. [Class 39 (i)] An oxide cathode particularly for gas-filled tubes consists of a plurality of coated wire helices arranged one within another, at least one wire being traversed by the heating current. The helices are preferably arranged concentrically. In one form, two wires consisting of nickel wire wound on a tungsten core are helically coiled one within the other and are joined at one end to one lead-in. Separate leads are taken out at the other end so that either wire may be heated. The helices are insulated by their oxide coatings, or porcelain rods may be slipped between them.
GB25342/34A 1933-09-14 1934-09-03 Improvements in oxide cathodes more particularly for gasfilled discharged tubes Expired GB422694A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE422694X 1933-09-14

Publications (1)

Publication Number Publication Date
GB422694A true GB422694A (en) 1935-01-16

Family

ID=6465557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25342/34A Expired GB422694A (en) 1933-09-14 1934-09-03 Improvements in oxide cathodes more particularly for gasfilled discharged tubes

Country Status (2)

Country Link
US (1) US2108589A (en)
GB (1) GB422694A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE907677C (en) * 1938-10-09 1954-03-29 Aeg Directly heated cathode consisting of two coils lying in a common cylindrical surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE907677C (en) * 1938-10-09 1954-03-29 Aeg Directly heated cathode consisting of two coils lying in a common cylindrical surface

Also Published As

Publication number Publication date
US2108589A (en) 1938-02-15

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