GB534154A - Improvements in or relating to cathodes for electron discharge devices - Google Patents

Improvements in or relating to cathodes for electron discharge devices

Info

Publication number
GB534154A
GB534154A GB24573/39A GB2457339A GB534154A GB 534154 A GB534154 A GB 534154A GB 24573/39 A GB24573/39 A GB 24573/39A GB 2457339 A GB2457339 A GB 2457339A GB 534154 A GB534154 A GB 534154A
Authority
GB
United Kingdom
Prior art keywords
nickel
per cent
discharge devices
carbon
cathodes
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
GB24573/39A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB534154A publication Critical patent/GB534154A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part
    • 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
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating
    • Y10T29/49986—Subsequent to metal working

Abstract

534,154. Refining nickel ; alloys. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 26, 1939, No. 24573. Convention date, Aug. 27, 1938. [Class 82 (i)] An oxide-coated cathode for electric discharge devices has a core consisting of nickel containing 0.02-0.05 per cent. of carbon, and free from other reducing agents, with or without less than 0.075 per cent. of iron and traces of silicon, copper, and magnesium. The nickel may contain up to 0.8 per cent. of cobalt. The material may be made by melting pure nickel, adding carbon, for example, 0.5 per cent. rolling, and annealing. The carbon may be added in admixture with powdered nickel ,and a binder. U.S.A. Specification 2,029,482 is referred to.
GB24573/39A 1938-08-27 1939-08-26 Improvements in or relating to cathodes for electron discharge devices Expired GB534154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US227068A US2179110A (en) 1938-08-27 1938-08-27 Cathode for electron discharge devices

Publications (1)

Publication Number Publication Date
GB534154A true GB534154A (en) 1941-02-28

Family

ID=22851617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24573/39A Expired GB534154A (en) 1938-08-27 1939-08-26 Improvements in or relating to cathodes for electron discharge devices

Country Status (2)

Country Link
US (1) US2179110A (en)
GB (1) GB534154A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733173A (en) * 1956-01-31 Activated cathodes for electron
US2753283A (en) * 1951-06-30 1956-07-03 Rca Corp Method of making nickel-carbon alloy sleeves
US2830917A (en) * 1954-06-07 1958-04-15 Bell Telephone Labor Inc Cathode for electron discharge devices
US2996795A (en) * 1955-06-28 1961-08-22 Gen Electric Thermionic cathodes and methods of making
NL158647B (en) * 1973-06-06 1978-11-15 Philips Nv OXYD CATHOD FOR AN ELECTRIC DISCHARGE TUBE.

Also Published As

Publication number Publication date
US2179110A (en) 1939-11-07

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