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GB1109083A - An electron emitter - Google Patents

An electron emitter

Info

Publication number
GB1109083A
GB1109083A GB1600765A GB1600765A GB1109083A GB 1109083 A GB1109083 A GB 1109083A GB 1600765 A GB1600765 A GB 1600765A GB 1600765 A GB1600765 A GB 1600765A GB 1109083 A GB1109083 A GB 1109083A
Authority
GB
United Kingdom
Prior art keywords
graphite
secured
heater
header
leads
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
GB1600765A
Inventor
Susumu Yoshida
Hiroki Sato
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.)
Sony Corp
Original Assignee
Sony 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
Priority to US446054A priority Critical patent/US3389290A/en
Application filed by Sony Corp filed Critical Sony Corp
Priority to GB1600765A priority patent/GB1109083A/en
Publication of GB1109083A publication Critical patent/GB1109083A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • 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
    • H01J1/15—Cathodes heated directly by an electric current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/04—Cathodes

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

1,109,083. Thermionic cathode constructions. SONY CORPORATION. 14 April, 1965, No. 16007/65. Heading H1D. [Also in Division B3] A thermionic cathode comprises a graphite heating element 2 having a first or central part of reduced thickness compared to its ends with metallic leads 8 secured to a second part of the element by an intermediate layer containing a stable metal carbide formed integrally with the graphite heating element, and electron emissive material 3 on a Ni base 4 secured to the graphite also by an intermediate carbide layer. As shown, enlarged end sections of heater 2 are secured in recesses in a ceramic header 1, and are apertured to receive leads 8 of Ni, or Ni-Co or Ni-Fe alloys coated with a metal powder, e.g. Mo, W, Ti, V, Ta, Nb, Zr or Cr, in an organic binder. Upon heating at 1100‹ to 2000‹ C. in a non-oxidizing or inert atmosphere, the metal powder alloys with the leads and forms an integral carbide layer with the graphite. The emissive material, comprising Ba and Sr oxides, is similarly bonded to the graphite heater. The cathode assembly is mounted in the grid cup 10 of a cathode-ray tube gun between ceramic spacer 12 and retainer 13. To permit the heater to expand longitudinally, one end may extend freely into a slot in header 1, this end being secured to a Ni foil lead which is cemented to the lower end of the header, Fig. 7 (not shown). Specific examples and dimensions are given.
GB1600765A 1965-04-06 1965-04-14 An electron emitter Expired GB1109083A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US446054A US3389290A (en) 1965-04-06 1965-04-06 Electron gun device
GB1600765A GB1109083A (en) 1965-04-14 1965-04-14 An electron emitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1600765A GB1109083A (en) 1965-04-14 1965-04-14 An electron emitter

Publications (1)

Publication Number Publication Date
GB1109083A true GB1109083A (en) 1968-04-10

Family

ID=10069506

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1600765A Expired GB1109083A (en) 1965-04-06 1965-04-14 An electron emitter

Country Status (1)

Country Link
GB (1) GB1109083A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2306521A1 (en) * 1975-04-03 1976-10-29 Sony Corp THERMOIONIC CATHODE OF CATHODIC TUBE
FR2398381A1 (en) * 1977-07-21 1979-02-16 Philips Nv ELECTRONIC TUBE CONTAINING AN INCANDESCENT CATHODE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2306521A1 (en) * 1975-04-03 1976-10-29 Sony Corp THERMOIONIC CATHODE OF CATHODIC TUBE
FR2398381A1 (en) * 1977-07-21 1979-02-16 Philips Nv ELECTRONIC TUBE CONTAINING AN INCANDESCENT CATHODE

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