GB966377A - A heating filament - Google Patents

A heating filament

Info

Publication number
GB966377A
GB966377A GB36179/61A GB3617961A GB966377A GB 966377 A GB966377 A GB 966377A GB 36179/61 A GB36179/61 A GB 36179/61A GB 3617961 A GB3617961 A GB 3617961A GB 966377 A GB966377 A GB 966377A
Authority
GB
United Kingdom
Prior art keywords
coating
oxide
sintered
oct
mixture
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
GB36179/61A
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.)
Tesla AS
Original Assignee
Tesla AS
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 Tesla AS filed Critical Tesla AS
Publication of GB966377A publication Critical patent/GB966377A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/22—Heaters
    • 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
    • H01J9/08—Manufacture of heaters for indirectly-heated cathodes
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2942—Plural coatings
    • Y10T428/2949—Glass, ceramic or metal oxide in coating

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Cold Cathode And The Manufacture (AREA)

Abstract

966,377. Electric heating resistances. TESLA, NARODNI PODNIK. Oct. 9, 1961 [Oct. 18, 1960], No. 36179/61. Heading H5H. A heating filament for a thermionic valve comprises a metal filament having an electrically insulating first coating of aluminium oxide, beryllium oxide, or a mixture thereof, and a second coating applied to the first coating including aluminium oxide, beryllium oxide, or a mixture thereof, and an oxide of titanium, zirconium, hafnium, thorium, chromium, molybdenum, tungsten, or uranium, or mixtures thereof. The first coating is applied to the metal filament in a known manner and sintered, the second coating being subsequently applied by spraying, immersion, or electrophoresis to a thickness of approximately 30 microns. The second coating is then sintered in vacuo, hydrogen, or carbon monoxide gas.
GB36179/61A 1960-10-18 1961-10-09 A heating filament Expired GB966377A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS622560 1960-10-18

Publications (1)

Publication Number Publication Date
GB966377A true GB966377A (en) 1964-08-12

Family

ID=5408774

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36179/61A Expired GB966377A (en) 1960-10-18 1961-10-09 A heating filament

Country Status (5)

Country Link
US (1) US3134691A (en)
DE (1) DE1240998B (en)
FR (1) FR1303897A (en)
GB (1) GB966377A (en)
NL (1) NL269971A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1355710A (en) * 1963-02-06 1964-03-20 Radiotechnique Further development of cathode heating filaments for electron tubes
US3370978A (en) * 1964-02-26 1968-02-27 Sperry Rand Corp Method of stabilizing tunneling insulator films
US4176293A (en) * 1978-02-17 1979-11-27 Varian Associates, Inc. Thermionic cathode heater having reduced magnetic field
DE4420607A1 (en) * 1994-06-13 1995-12-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric incandescent lamp and filament for incandescent lamps
US8215002B2 (en) * 2007-09-29 2012-07-10 Osram Sylvania Inc. Method of making a lamp coil

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US212860A (en) * 1879-03-04 Improvement in electric lights
BE359097A (en) * 1928-04-13
US2128270A (en) * 1928-04-30 1938-08-30 Hans J Spanner Lighting device
US2043720A (en) * 1933-11-25 1936-06-09 Rca Corp Thermionic cathode heater and method of making it
GB684141A (en) * 1950-03-29 1952-12-10 Loewe Opta Ag Method for applying insulating coatings to metallic conductive wires employed for heating
US2734857A (en) * 1951-10-11 1956-02-14 snyder
US2985548A (en) * 1957-12-26 1961-05-23 Sylvania Electric Prod Method of making a low density coating for an electron discharge device
US3029360A (en) * 1958-04-29 1962-04-10 Rca Corp Heater wire coating process
US3041210A (en) * 1959-12-02 1962-06-26 Tung Sol Electric Inc Method of making cold cathodes for vacuum tubes and article

Also Published As

Publication number Publication date
US3134691A (en) 1964-05-26
FR1303897A (en) 1962-09-14
DE1240998B (en) 1967-05-24
NL269971A (en)

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