GB962926A - Improvements in thermionic cathodes and in methods of manufacturing such cathodes - Google Patents

Improvements in thermionic cathodes and in methods of manufacturing such cathodes

Info

Publication number
GB962926A
GB962926A GB10374/62A GB1037462A GB962926A GB 962926 A GB962926 A GB 962926A GB 10374/62 A GB10374/62 A GB 10374/62A GB 1037462 A GB1037462 A GB 1037462A GB 962926 A GB962926 A GB 962926A
Authority
GB
United Kingdom
Prior art keywords
layer
heater
deposited
cathode
insulating
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
GB10374/62A
Inventor
Edwin John Davis
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.)
Rank Bush Murphy Ltd
Original Assignee
Rank Bush Murphy 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 Rank Bush Murphy Ltd filed Critical Rank Bush Murphy Ltd
Priority to GB10374/62A priority Critical patent/GB962926A/en
Priority to US257293A priority patent/US3307974A/en
Publication of GB962926A publication Critical patent/GB962926A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

962,926. Thermionic cathodes. RANKBUSH MURPHY Ltd. March 18, 1963 [March 19, 1962], No. 10374/62. Heading H1D. [Also in Division H5] A thermionic cathode for a valve or cathode-ray tube comprises an insulating body 1 on which are deposited a conducting layer 2 forming a heater, an insulating layer 4, and a further conducting layer 7 on which is an emissive layer 8. The base 1 is of quartz, ceramic or synthetic sapphire, the heater 2 is deposited by vacuum evaporation, cathodic sputtering, electrodeposition or is of conductive paint, and is either of serpentine or plicated form or a continuous layer preferably of varying thickness. The insulating layer 4 is of tantalum oxide, magnesium oxide, silicon dioxide or aluminium oxide, formed by evaporation or vapour deposition, or by oxidizing a layer of the metal, e.g. by anodization. Alternatively, the surface of the heater may be oxidized to form the layer. The layer 7 is of nickel or its alloy, or platinum, deposited as for layer 2. The emissive layer 8 may be a coating of single or multiple-carbonate type, or a combination of emissive material and spongy or sintered porous metal. The cathode may be in strip form (Figs. 1 . . . 4, not shown), tubular form (Figs. 6, 7, not shown), or disc shaped, suspended across a block of insulating material in which is a hemispherical depression coated with a heat reflecting layer - nickel or platinum (Figs. 11 . . . 13, not shown).
GB10374/62A 1962-03-19 1962-03-19 Improvements in thermionic cathodes and in methods of manufacturing such cathodes Expired GB962926A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB10374/62A GB962926A (en) 1962-03-19 1962-03-19 Improvements in thermionic cathodes and in methods of manufacturing such cathodes
US257293A US3307974A (en) 1962-03-19 1963-02-08 Method of forming thermionic cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10374/62A GB962926A (en) 1962-03-19 1962-03-19 Improvements in thermionic cathodes and in methods of manufacturing such cathodes

Publications (1)

Publication Number Publication Date
GB962926A true GB962926A (en) 1964-07-08

Family

ID=9966671

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10374/62A Expired GB962926A (en) 1962-03-19 1962-03-19 Improvements in thermionic cathodes and in methods of manufacturing such cathodes

Country Status (2)

Country Link
US (1) US3307974A (en)
GB (1) GB962926A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081270A2 (en) * 1981-12-08 1983-06-15 Philips Patentverwaltung GmbH Process for producing a thermionic cathode, and thermionic cathode manufactured by this process
US5475281A (en) * 1991-02-25 1995-12-12 U.S. Philips Corporation Cathode

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2325136B2 (en) * 1972-05-17 1977-09-01 ELECTRON TUBE WITH NON-THERMAL ELECTRON EMISSIONS CAPHODE
US3839771A (en) * 1970-06-01 1974-10-08 Pro Int Corp Method for constructing a thermionic couple
DE2037874B2 (en) * 1970-07-30 1972-12-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt METHOD OF MAKING A SUPPLY CATHOD
US3715288A (en) * 1970-11-10 1973-02-06 Sensors Inc Method of fabricating film-type sensing structures
JPS51115765A (en) * 1975-04-03 1976-10-12 Sony Corp Electron tube cathode apparatus
US6259193B1 (en) * 1998-06-08 2001-07-10 General Electric Company Emissive filament and support structure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE724812C (en) * 1935-10-02 1942-09-05 Loewe Radio Ag Heating element for indirectly heated high-voltage cathodes
US2251745A (en) * 1937-12-18 1941-08-05 Fides Gmbh Method for manufacturing semiconducting resistors
US2242395A (en) * 1938-06-18 1941-05-20 Fernseh Ag Electron emissive cathode
US2843713A (en) * 1954-08-04 1958-07-15 Libbey Owens Ford Glass Co Electrically heated articles
US3184659A (en) * 1962-08-13 1965-05-18 Gen Telephone & Elect Tunnel cathode having a metal grid structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0081270A2 (en) * 1981-12-08 1983-06-15 Philips Patentverwaltung GmbH Process for producing a thermionic cathode, and thermionic cathode manufactured by this process
EP0081270A3 (en) * 1981-12-08 1984-06-06 Philips Patentverwaltung Gmbh Process for producing a thermionic cathode, and thermionic cathode manufactured by this process
US5475281A (en) * 1991-02-25 1995-12-12 U.S. Philips Corporation Cathode

Also Published As

Publication number Publication date
US3307974A (en) 1967-03-07

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