GB763049A - Improvements in or relating to cathode heater elements and methods of making such elements - Google Patents

Improvements in or relating to cathode heater elements and methods of making such elements

Info

Publication number
GB763049A
GB763049A GB25418/52A GB2541852A GB763049A GB 763049 A GB763049 A GB 763049A GB 25418/52 A GB25418/52 A GB 25418/52A GB 2541852 A GB2541852 A GB 2541852A GB 763049 A GB763049 A GB 763049A
Authority
GB
United Kingdom
Prior art keywords
aluminium
elements
nitrate
oct
tungsten
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
GB25418/52A
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.)
Rauland Borg Corp
Original Assignee
Rauland Borg Corp
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 Rauland Borg Corp filed Critical Rauland Borg Corp
Publication of GB763049A publication Critical patent/GB763049A/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
    • H01J9/08—Manufacture of heaters for indirectly-heated cathodes

Landscapes

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

Abstract

763,049. Electrophoretic deposition. RAULAND CORPORATION. Oct. 10, 1952 [Oct. 11, 1951], No. 25418/52. Drawings to Specification. Class 41. [Also in Group XI] A metal member for a cathode heater element (see Group XI) has an insulating coating applied thereto by electrophoretic deposition at 100 volts in a suspension of aluminium oxide in a mixture of water and methanol which contains small amounts of hydrated aluminium nitrate and hydrated magnesium nitrate. The member may be tungsten or tungsten-molybdenum alloy. The aluminium nitrate hydrolyses and the resulting aluminium hydroxide moves to the member and there traps aluminium oxide particles. The member is subsequently air-dried, dipped in or sprayed wtih a non- aqueous silica solution, air-dried and fired in hydrogen, an inert gas or in a vacuum at about 1710‹ C. A baking operation at 400‹ C. may precede or replace the firing operation.
GB25418/52A 1951-10-11 1952-10-10 Improvements in or relating to cathode heater elements and methods of making such elements Expired GB763049A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US763049XA 1951-10-11 1951-10-11

Publications (1)

Publication Number Publication Date
GB763049A true GB763049A (en) 1956-12-05

Family

ID=22131141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25418/52A Expired GB763049A (en) 1951-10-11 1952-10-10 Improvements in or relating to cathode heater elements and methods of making such elements

Country Status (2)

Country Link
US (1) US2734857A (en)
GB (1) GB763049A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2848391A (en) * 1953-10-19 1958-08-19 Vitro Corp Of America Method of making a multiple lamination construction
NL84939C (en) * 1954-01-01
US2828218A (en) * 1954-02-10 1958-03-25 Fletcher Enamel Company Enameling composition and process
US2927069A (en) * 1956-12-07 1960-03-01 Columbia Broadcasting Syst Inc Method of insulating electron discharge tube elements
US3031340A (en) * 1957-08-12 1962-04-24 Peter R Girardot Composite ceramic-metal bodies and methods for the preparation thereof
US2923585A (en) * 1959-02-27 1960-02-02 Rauland Corp Manufacture of electrical discharge devices
NL269971A (en) * 1960-10-18
US3484357A (en) * 1967-04-03 1969-12-16 Eagle Picher Ind Inc Electrophoretic deposition of ceramic coatings
DE2364403C3 (en) * 1973-12-22 1978-06-08 Standard Elektrik Lorenz Ag, 7000 Stuttgart Method for manufacturing a heater for an indirectly heated cathode
US4054500A (en) * 1975-04-28 1977-10-18 Gte Sylvania Incorporated Method of making refractory metal-ceramic crucible
US4595473A (en) * 1984-08-28 1986-06-17 Trw Inc. Forging lubricant

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1926407A (en) * 1928-02-25 1933-09-12 Ruben Tube Company Filament for heater type vacuum tubes
US1874542A (en) * 1929-09-24 1932-08-30 Arcturus Radio Tube Co Insulating coating for filaments and method of applying the same
US2158665A (en) * 1932-06-30 1939-05-16 Hygrade Sylvania Corp Electron discharge device
US2307018A (en) * 1938-06-25 1943-01-05 Raytheon Production Corp Cataphoretic deposition of insulating coatings
US2348045A (en) * 1942-01-01 1944-05-02 Bell Telephone Labor Inc Electron discharge device and method of manufacture
US2552535A (en) * 1949-01-24 1951-05-15 Int Standard Electric Corp Electron discharge device electrode

Also Published As

Publication number Publication date
US2734857A (en) 1956-02-14

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