CH469351A - Micro heating element, in particular for cathodes of electron tubes - Google Patents

Micro heating element, in particular for cathodes of electron tubes

Info

Publication number
CH469351A
CH469351A CH315468A CH315468A CH469351A CH 469351 A CH469351 A CH 469351A CH 315468 A CH315468 A CH 315468A CH 315468 A CH315468 A CH 315468A CH 469351 A CH469351 A CH 469351A
Authority
CH
Switzerland
Prior art keywords
cathodes
heating element
electron tubes
micro heating
micro
Prior art date
Application number
CH315468A
Other languages
German (de)
Inventor
Franciscus Knippenbe Wilhelmus
Zalm Pieter
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of CH469351A publication Critical patent/CH469351A/en

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
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/022—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Solid Thermionic Cathode (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Carbon And Carbon Compounds (AREA)
CH315468A 1967-03-07 1968-03-04 Micro heating element, in particular for cathodes of electron tubes CH469351A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6703548A NL6703548A (en) 1967-03-07 1967-03-07

Publications (1)

Publication Number Publication Date
CH469351A true CH469351A (en) 1969-02-28

Family

ID=19799479

Family Applications (1)

Application Number Title Priority Date Filing Date
CH315468A CH469351A (en) 1967-03-07 1968-03-04 Micro heating element, in particular for cathodes of electron tubes

Country Status (7)

Country Link
US (1) US3495120A (en)
CH (1) CH469351A (en)
DE (1) DE1639354A1 (en)
ES (1) ES351239A1 (en)
FR (1) FR1558677A (en)
GB (1) GB1222887A (en)
NL (1) NL6703548A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111243917A (en) * 2020-01-19 2020-06-05 中国科学院电子学研究所 Cathode heater assembly and preparation method thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5118983A (en) * 1989-03-24 1992-06-02 Mitsubishi Denki Kabushiki Kaisha Thermionic electron source
NL9100327A (en) * 1991-02-25 1992-09-16 Philips Nv CATHODE.
GB2404128B (en) * 2003-07-16 2005-08-24 Kanthal Ltd Silicon carbide furnace heating elements
DE102017101946A1 (en) 2017-02-01 2018-08-02 Epcos Ag PTC heater with reduced inrush current
US20200066474A1 (en) * 2018-08-22 2020-02-27 Modern Electron, LLC Cathodes with conformal cathode surfaces, vacuum electronic devices with cathodes with conformal cathode surfaces, and methods of manufacturing the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814759A (en) * 1926-02-10 1931-07-14 Frederick S Mccullough Cathode structure
US3380936A (en) * 1965-10-18 1968-04-30 Matsushita Electric Ind Co Ltd Silicon carbide varistors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111243917A (en) * 2020-01-19 2020-06-05 中国科学院电子学研究所 Cathode heater assembly and preparation method thereof

Also Published As

Publication number Publication date
NL6703548A (en) 1968-09-09
DE1639354A1 (en) 1970-06-04
ES351239A1 (en) 1969-06-01
FR1558677A (en) 1969-02-28
GB1222887A (en) 1971-02-17
US3495120A (en) 1970-02-10

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