GB430169A - Electron emitters and methods of manufacturing same - Google Patents

Electron emitters and methods of manufacturing same

Info

Publication number
GB430169A
GB430169A GB35202/33A GB3520233A GB430169A GB 430169 A GB430169 A GB 430169A GB 35202/33 A GB35202/33 A GB 35202/33A GB 3520233 A GB3520233 A GB 3520233A GB 430169 A GB430169 A GB 430169A
Authority
GB
United Kingdom
Prior art keywords
metal
barium
strontium
street
platinum
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
GB35202/33A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB430169A publication Critical patent/GB430169A/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
    • H01J9/047—Cathodes having impregnated bodies

Abstract

430,169. Thermionic cathodes. STANDARD TELEPHONES & CABLES, Ltd., 63, Aldwych, London.-(Assignees of Wilson, J. R. ; 15, Lowell Avenue, Mountain Lakes, New Jersey, Acker, J. T.; 110, 213th Street, Queen's Village, New York, and Hartman, C. D. ; 69, Orville Street, Forest Hills, New York, both in U.S.A.) Dec. 14, 1933, No. 35202. Convention date, June 30. [Class 39 (i)] A coating-composition comprises barium and strontium carbonates, a compound of a metal or metals of the eighth group of the periodic system, and a fluid suspension medium. A binder may be added. The mixture is coated on the core, heated to evaporate the suspension medium, mounted in situ and heated to decompose the compounds to oxides. The oxide of the metal of the eighth group is reduced to the metal by a reducing gas, and a portion of the alkaline earth oxide to the metal by electron bombardment in carbon monoxide. Barium and strontium carbonates may be mixed with nickelous carbonate, together with nitrocellulose dissolved in amylacetate. Barium and strontium nitrates may be added to form a low temperature fusible bond. Instead of nickel, iron, cobalt, palladium, platinum or nickel - platinum may be used. The cathode may be activated by glowing it in a hydrocarbon vapour of the paraffin series such as methane, as described in Specification 430,170.
GB35202/33A 1933-06-30 1933-12-14 Electron emitters and methods of manufacturing same Expired GB430169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US678426A US2041802A (en) 1933-06-30 1933-06-30 Electron emitter

Publications (1)

Publication Number Publication Date
GB430169A true GB430169A (en) 1935-06-14

Family

ID=24722735

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35202/33A Expired GB430169A (en) 1933-06-30 1933-12-14 Electron emitters and methods of manufacturing same

Country Status (5)

Country Link
US (1) US2041802A (en)
DE (1) DE667942C (en)
FR (1) FR768485A (en)
GB (1) GB430169A (en)
NL (1) NL39798C (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457515A (en) * 1941-11-13 1948-12-28 Bell Telephone Labor Inc Insulating coating compositions and method of making
US2486955A (en) * 1943-11-12 1949-11-01 Atomic Energy Commission Producing thin film of metal oxide
US2558491A (en) * 1947-08-19 1951-06-26 Hartford Nat Bank & Trust Co Method of manufacturing electric discharge tubes
US2506466A (en) * 1947-08-28 1950-05-02 Bishop H Russell Electron emitters
NL78158C (en) * 1949-03-17
US2631945A (en) * 1949-11-19 1953-03-17 Bell Telephone Labor Inc Cold cathode and method of preparing same
US2686735A (en) * 1951-01-03 1954-08-17 Rca Corp Cathode material
US2744838A (en) * 1951-11-03 1956-05-08 Gen Electric Electron discharge device cathode and method of making same
US2764511A (en) * 1953-08-28 1956-09-25 Sylvania Electric Prod Filamentary cathode and method of making same
US2809323A (en) * 1954-03-24 1957-10-08 Gen Electric Penetrating ray transducer
US2950993A (en) * 1956-04-02 1960-08-30 Rca Corp Oxide coated cathodes and method of manufacture
US3102827A (en) * 1960-08-10 1963-09-03 Premier Ind Corp Welding rod
US3058210A (en) * 1960-08-23 1962-10-16 Sperry Rand Corp Sealing mixture and method
NL278653A (en) * 1961-06-01
US3850683A (en) * 1973-06-12 1974-11-26 Koppers Co Inc Iron stain inhibitors

Also Published As

Publication number Publication date
FR768485A (en) 1934-08-07
US2041802A (en) 1936-05-26
DE667942C (en) 1938-11-23
NL39798C (en) 1937-01-15

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