EP0034512A3 - Heating element for indirectly heated cathodes, process for manufacturing such an element and indirectly heated cathode comprising the same - Google Patents

Heating element for indirectly heated cathodes, process for manufacturing such an element and indirectly heated cathode comprising the same Download PDF

Info

Publication number
EP0034512A3
EP0034512A3 EP81400096A EP81400096A EP0034512A3 EP 0034512 A3 EP0034512 A3 EP 0034512A3 EP 81400096 A EP81400096 A EP 81400096A EP 81400096 A EP81400096 A EP 81400096A EP 0034512 A3 EP0034512 A3 EP 0034512A3
Authority
EP
European Patent Office
Prior art keywords
indirectly heated
manufacturing
heating element
same
cathode
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.)
Withdrawn
Application number
EP81400096A
Other languages
German (de)
French (fr)
Other versions
EP0034512A2 (en
Inventor
Arvind Shroff
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0034512A2 publication Critical patent/EP0034512A2/en
Publication of EP0034512A3 publication Critical patent/EP0034512A3/en
Withdrawn legal-status Critical Current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)
  • Powder Metallurgy (AREA)

Abstract

Cet élément chauffant est constitué d'un filament (3) et d'un mélange (4), fritté entre 1700 et 1800°C, d'alumine et de moins de 10 % en poids d'oxyde d'yttrium. Ce mélange rem­ plit l'espace laissé libre par le filament à l'intérieur du cylindre (2) obturé par un disque émissif (1) qui constitue la cathode. This heating element consists of a filament (3) and a mixture (4), sintered between 1700 and 1800 ° C, alumina and less than 10% by weight of yttrium oxide. This mixture rem folds the space left by the filament inside the cylinder (2) closed by an emissive disc (1) which constitutes the cathode.

EP81400096A 1980-02-15 1981-01-23 Heating element for indirectly heated cathodes, process for manufacturing such an element and indirectly heated cathode comprising the same Withdrawn EP0034512A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8003410 1980-02-15
FR8003410A FR2476386A1 (en) 1980-02-15 1980-02-15 INDIRECT HEATING CATHODE HEATING ELEMENT, METHOD OF MANUFACTURING THE SAME, AND INDIRECT HEATING CATHODE COMPRISING SUCH A MEMBER

Publications (2)

Publication Number Publication Date
EP0034512A2 EP0034512A2 (en) 1981-08-26
EP0034512A3 true EP0034512A3 (en) 1982-05-26

Family

ID=9238641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400096A Withdrawn EP0034512A3 (en) 1980-02-15 1981-01-23 Heating element for indirectly heated cathodes, process for manufacturing such an element and indirectly heated cathode comprising the same

Country Status (3)

Country Link
US (1) US4427916A (en)
EP (1) EP0034512A3 (en)
FR (1) FR2476386A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189447U (en) * 1984-05-28 1985-12-16 アップリカ葛西株式会社 Child safety seat for automobiles
JPH0624093B2 (en) * 1984-12-26 1994-03-30 株式会社日立製作所 Heater for indirectly heated cathode
FR2664427A1 (en) * 1990-07-03 1992-01-10 Thomson Tubes Electroniques Indirect-heating cathode with integrated filament for linear beam tube
US5065070A (en) * 1990-12-21 1991-11-12 Hughes Aircraft Company Sputtered scandate coatings for dispenser cathodes
US5208508A (en) * 1991-09-16 1993-05-04 Raytheon Company Cathode heater potting assembly
FR2681726A1 (en) * 1991-09-20 1993-03-26 Thomson Tubes Electroniques Insulating potting for indirect heating cathodes
ATE343850T1 (en) * 1999-08-22 2006-11-15 Ip2H Ag LIGHT SOURCE WITH INDIRECTLY HEATED FILAMENT
CN112490098B (en) * 2020-12-09 2023-03-14 成都国光电气股份有限公司 Mixed filling powder for hot wire component and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1315581A (en) * 1961-02-24 1963-01-18 Siemens Ag Process for manufacturing vacuum-holding insulating sintered bodies
US3400294A (en) * 1964-12-07 1968-09-03 Gen Electric Heated cathode and method of manufacture
DE1805821A1 (en) * 1968-10-29 1970-06-04 Telefunken Patent Indirectly heated emission electrode
US3803441A (en) * 1972-04-28 1974-04-09 Tokyo Shibaura Electric Co Indirectly heated type cathode devices using foil heater embedded in mixture of heat resistant dielectric and a metal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1315581A (en) * 1961-02-24 1963-01-18 Siemens Ag Process for manufacturing vacuum-holding insulating sintered bodies
US3400294A (en) * 1964-12-07 1968-09-03 Gen Electric Heated cathode and method of manufacture
DE1805821A1 (en) * 1968-10-29 1970-06-04 Telefunken Patent Indirectly heated emission electrode
US3803441A (en) * 1972-04-28 1974-04-09 Tokyo Shibaura Electric Co Indirectly heated type cathode devices using foil heater embedded in mixture of heat resistant dielectric and a metal

Also Published As

Publication number Publication date
FR2476386A1 (en) 1981-08-21
EP0034512A2 (en) 1981-08-26
US4427916A (en) 1984-01-24
FR2476386B1 (en) 1982-08-20

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE GB IT

PUAL Search report despatched

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17P Request for examination filed

Effective date: 19820608

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19860206

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SHROFF, ARVIND