ES471851A1 - Un tubo electronico - Google Patents

Un tubo electronico

Info

Publication number
ES471851A1
ES471851A1 ES471851A ES471851A ES471851A1 ES 471851 A1 ES471851 A1 ES 471851A1 ES 471851 A ES471851 A ES 471851A ES 471851 A ES471851 A ES 471851A ES 471851 A1 ES471851 A1 ES 471851A1
Authority
ES
Spain
Prior art keywords
heating element
emissive
pyrolytic graphite
planar
electron tube
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
ES471851A
Other languages
English (en)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES471851A1 publication Critical patent/ES471851A1/es
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
    • H01J1/24—Insulating layer or body located between heater and emissive material

Landscapes

  • Solid Thermionic Cathode (AREA)
  • General Induction Heating (AREA)

Abstract

Un tubo electrónico que comprende un cátodo termoiónico que tiene un cuerpo emisor plano y un elemento de calentamiento de grafito pirolítico, que está dispuesto en el costado del cuerpo emisor, alejado de la superficie emisora del cuerpo emisor, caracterizado porque el elemento de calentamiento es plano y el eje cristalográfico c del grafito pirolítico se extiende por todas partes en dirección normal a la superficie del elemento de calentamiento enfrentada al cuerpo emisor.
ES471851A 1977-07-21 1978-07-19 Un tubo electronico Expired ES471851A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2732960A DE2732960C2 (de) 1977-07-21 1977-07-21 Glühkathode und Verfahren zu ihrer Herstellung

Publications (1)

Publication Number Publication Date
ES471851A1 true ES471851A1 (es) 1979-02-01

Family

ID=6014512

Family Applications (1)

Application Number Title Priority Date Filing Date
ES471851A Expired ES471851A1 (es) 1977-07-21 1978-07-19 Un tubo electronico

Country Status (10)

Country Link
US (1) US4178530A (es)
JP (1) JPS5422755A (es)
BE (1) BE869130A (es)
CA (1) CA1110689A (es)
DE (1) DE2732960C2 (es)
ES (1) ES471851A1 (es)
FR (1) FR2398381A1 (es)
GB (1) GB2001470B (es)
IT (1) IT1097892B (es)
NL (1) NL7807754A (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2759147A1 (de) * 1977-12-31 1979-07-12 Philips Patentverwaltung Elektronenroehre mit einem heizer aus pyrolytischem graphit
US4302701A (en) * 1978-07-07 1981-11-24 Siemens Aktiengesellschaft Directly heated cathode for an electron tube with coaxial electrode design
FR2445605A1 (fr) * 1978-12-27 1980-07-25 Thomson Csf Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode
DE3014216A1 (de) * 1980-04-14 1981-10-15 Philips Patentverwaltung Gmbh, 2000 Hamburg Gluehkathode fuer eine elektronenroehre
FR2498372A1 (fr) * 1981-01-16 1982-07-23 Thomson Csf Cathode a chauffage direct, son procede de fabrication, et tube electronique incorporant une telle cathode
US4760306A (en) * 1983-06-10 1988-07-26 The United States Of America As Represented By The United States Department Of Energy Electron emitting filaments for electron discharge devices
DE3334971A1 (de) * 1983-09-27 1985-04-18 Siemens AG, 1000 Berlin und 8000 München Vorratskathode, insbesondere metall-kapillar-kathode
GB8611967D0 (en) * 1986-05-16 1986-10-29 English Electric Valve Co Ltd Directly heated cathodes
CH672860A5 (es) * 1986-09-29 1989-12-29 Balzers Hochvakuum
US5444327A (en) * 1993-06-30 1995-08-22 Varian Associates, Inc. Anisotropic pyrolytic graphite heater
FR2726121B1 (fr) * 1994-10-21 1996-11-15 Thomson Tubes Electroniques Dispositif de chauffage par rayonnement pour cathode a chauffage indirect
US5608838A (en) * 1994-12-07 1997-03-04 Brookley; Charles E. Blackbody type heating element for calibration furnace with pyrolytic graphite coating disposed on end cap electrode members
US6741805B2 (en) * 2001-09-27 2004-05-25 Bai Wei Wu Flexible graphite felt heating elements and a process for radiating infrared

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1109083A (en) * 1965-04-14 1968-04-10 Sony Corp An electron emitter
US3389290A (en) * 1965-04-06 1968-06-18 Sony Corp Electron gun device
US3411123A (en) * 1966-05-10 1968-11-12 Gen Electric Pyrolytic graphite electrical resistance element
FR1593831A (es) * 1967-12-13 1970-06-01
DE1614680C3 (de) * 1967-12-13 1973-10-11 Siemens Ag, 1000 Berlin U. 8000 Muenchen Elektrisches Entladungsgefäß, insbe sondere HF Leistungsrohre
DE1614686B1 (de) * 1967-12-19 1971-03-11 Siemens Ag Mittelbar geheizte vorratskathode auf thorium-basis
US3532923A (en) * 1969-03-17 1970-10-06 Ibm Pyrolytic graphite support for lanthanum hexaboride cathode emitter

Also Published As

Publication number Publication date
GB2001470A (en) 1979-01-31
NL7807754A (nl) 1979-01-23
BE869130A (fr) 1979-01-19
GB2001470B (en) 1982-03-17
IT1097892B (it) 1985-08-31
IT7825849A0 (it) 1978-07-18
JPS5422755A (en) 1979-02-20
CA1110689A (en) 1981-10-13
JPS6151374B2 (es) 1986-11-08
FR2398381B1 (es) 1983-07-08
DE2732960A1 (de) 1979-02-01
FR2398381A1 (fr) 1979-02-16
US4178530A (en) 1979-12-11
DE2732960C2 (de) 1982-04-01

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