GB446862A - Improvements in or relating to oxide cathodes for electric discharge tubes - Google Patents

Improvements in or relating to oxide cathodes for electric discharge tubes

Info

Publication number
GB446862A
GB446862A GB13983/35A GB1398335A GB446862A GB 446862 A GB446862 A GB 446862A GB 13983/35 A GB13983/35 A GB 13983/35A GB 1398335 A GB1398335 A GB 1398335A GB 446862 A GB446862 A GB 446862A
Authority
GB
United Kingdom
Prior art keywords
rhodium
oxide
electric discharge
discharge tubes
core body
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
GB13983/35A
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 GB446862A publication Critical patent/GB446862A/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
    • H01J17/063—Indirectly heated cathodes, e.g. by the discharge itself

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

446,862. Thermionic cathodes. NAAMLOOZE VENNOOTSCHAP PHILIPS'GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. May 13, 1935, No. 13983. Convention date, July 26, 1934. [Class 39 (i)] An oxide cathode for electric discharge tubes, particularly gas or vapour filled tubes, comprises a core body of highly refractory material such as tungsten or molybdenum, an emitting layer comprising one or more oxides, and an intermediate layer of rhodium applied directly to the core body by electrolysis. Rhodium layers volatilize less easily than the usual nickel layers or windings. The emissive oxide may be barium oxide. The Specification as open to inspection under Sect. 91 comprises also the use of a layer comprising a winding of rhodium wire, which may itself be a helix. This subjectmatter does not appear in the Specification as accepted.
GB13983/35A 1934-07-26 1935-05-13 Improvements in or relating to oxide cathodes for electric discharge tubes Expired GB446862A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE446862X 1934-07-26

Publications (1)

Publication Number Publication Date
GB446862A true GB446862A (en) 1936-05-07

Family

ID=6537931

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13983/35A Expired GB446862A (en) 1934-07-26 1935-05-13 Improvements in or relating to oxide cathodes for electric discharge tubes

Country Status (1)

Country Link
GB (1) GB446862A (en)

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