GB796046A - Thermionic tube and method of making same - Google Patents

Thermionic tube and method of making same

Info

Publication number
GB796046A
GB796046A GB34739/56A GB3473956A GB796046A GB 796046 A GB796046 A GB 796046A GB 34739/56 A GB34739/56 A GB 34739/56A GB 3473956 A GB3473956 A GB 3473956A GB 796046 A GB796046 A GB 796046A
Authority
GB
United Kingdom
Prior art keywords
nickel
making same
carbide
thermionic tube
electrodes
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
GB34739/56A
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB796046A publication Critical patent/GB796046A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
    • H01J25/12—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator with pencil-like electron stream in the axis of the resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/22—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/22—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone
    • H01J25/24—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Chemically Coating (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

Electrodes of a high-conductivity metal such as copper are coated with nickel carbide by coating first with nickel, and then converting the surface of the nickel into the carbide, in order to inhibit secondary emission. The electrodes are cleaned, and then plated in a bath with a layer of nickel about 0.0005 in. thick. This is heated to 500 DEG C. or more in hydrogen which has been bubbled through a hydrocarbon such as benzene, gasoline, or kerosene, giving a surface layer of nickel carbide.
GB34739/56A 1953-09-14 1954-08-30 Thermionic tube and method of making same Expired GB796046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US380068A US2990495A (en) 1953-09-14 1953-09-14 Thermionic tube

Publications (1)

Publication Number Publication Date
GB796046A true GB796046A (en) 1958-06-04

Family

ID=23499777

Family Applications (2)

Application Number Title Priority Date Filing Date
GB25170/54A Expired GB796045A (en) 1953-09-14 1954-08-30 Thermionic tube and method of making same
GB34739/56A Expired GB796046A (en) 1953-09-14 1954-08-30 Thermionic tube and method of making same

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB25170/54A Expired GB796045A (en) 1953-09-14 1954-08-30 Thermionic tube and method of making same

Country Status (3)

Country Link
US (1) US2990495A (en)
FR (1) FR1147405A (en)
GB (2) GB796045A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075415A (en) * 1977-01-06 1978-02-21 Raytheon Company Tube with terminal end cap
US4233539A (en) * 1979-03-05 1980-11-11 Varian Associates, Inc. Electron tube with reduced secondary emission

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756892A (en) * 1956-07-31 Bleuze efal
US1866533A (en) * 1929-06-28 1932-07-12 Bell Telephone Labor Inc Vacuum tube mounting
US1888071A (en) * 1929-12-28 1932-11-15 Gen Electric Seal for electric discharge devices
US1979470A (en) * 1930-05-10 1934-11-06 Gladding Mcbean & Company Method of joining bell and spigot pipe sections
US1937629A (en) * 1931-08-19 1933-12-05 Du Pont Black finishing metal articles
US2048276A (en) * 1932-04-21 1936-07-21 Bruno S Teschner Plated metal having carbide surface
FR783353A (en) * 1933-12-27 1935-07-11 Porzellanfabrik Kahla Manufacturing process for conductive bushings
DE692573C (en) * 1936-02-24 1940-06-22 Felten & Guilleaume Carlswerk Process for the production of cable sleeves from thermoplastic materials
US2317305A (en) * 1941-07-05 1943-04-20 Gen Motors Corp Insulator seal
US2334020A (en) * 1941-10-08 1943-11-09 Rca Corp Glass-to-metal seal
GB645797A (en) * 1948-10-15 1950-11-08 Pyrotenax Ltd Improvements in or relating to end seals for electric cables
US2546208A (en) * 1949-04-30 1951-03-27 Injection Molding Company Method of sealing hollow bodies
US2627536A (en) * 1949-05-28 1953-02-03 Bendix Aviat Corp Electronic tube base and the like
US2706742A (en) * 1950-10-14 1955-04-19 Sprague Electric Co Resin sealed elastomeric housing for electrical components
US2705311A (en) * 1951-08-30 1955-03-29 George W Baker Electron space discharge device
US2617002A (en) * 1951-11-27 1952-11-04 Wiegand Co Edwin L Electric heater
US2727120A (en) * 1952-03-08 1955-12-13 Wiegand Co Edwin L Electric heaters
US2802896A (en) * 1952-11-13 1957-08-13 Sprague Electric Co Encased electric circuit component
US2788503A (en) * 1953-07-27 1957-04-09 Gen Electric Electron discharge device base structures

Also Published As

Publication number Publication date
US2990495A (en) 1961-06-27
FR1147405A (en) 1957-11-25
GB796045A (en) 1958-06-04

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