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GB816997A - Improvements in or relating to dispenser cathodes - Google Patents

Improvements in or relating to dispenser cathodes

Info

Publication number
GB816997A
GB816997A GB27384/57A GB2738457A GB816997A GB 816997 A GB816997 A GB 816997A GB 27384/57 A GB27384/57 A GB 27384/57A GB 2738457 A GB2738457 A GB 2738457A GB 816997 A GB816997 A GB 816997A
Authority
GB
United Kingdom
Prior art keywords
per cent
relating
sintered
mixed
dispenser cathodes
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
GB27384/57A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB816997A publication Critical patent/GB816997A/en
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
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Powder Metallurgy (AREA)

Abstract

An alloy of 75 per cent Mo, 25 per cent W is mixed as powder with alkaline earth aluminate powder, sintered, finely pulverized, mixed with up to 1 per cent by weight of powdered carbon, compressed and sintered to form a dispenser cathode body. Sintering in each case is at 1700 DEG C. for half a minute. Specification 777,142 [Group XL(a)] is referred to.
GB27384/57A 1956-09-05 1957-08-30 Improvements in or relating to dispenser cathodes Expired GB816997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US608130A US2929133A (en) 1956-09-05 1956-09-05 Dispenser cathode

Publications (1)

Publication Number Publication Date
GB816997A true GB816997A (en) 1959-07-22

Family

ID=24435167

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27384/57A Expired GB816997A (en) 1956-09-05 1957-08-30 Improvements in or relating to dispenser cathodes

Country Status (6)

Country Link
US (1) US2929133A (en)
BE (1) BE560502A (en)
DE (1) DE1040701B (en)
FR (1) FR1201432A (en)
GB (1) GB816997A (en)
NL (1) NL101006C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3169862A (en) * 1961-01-10 1965-02-16 Ciba Ltd Process for making anodes for electrolytic condensers

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055763A (en) * 1958-07-10 1962-09-25 Jack R Kreigh Metal-aggregate product
US3275435A (en) * 1963-11-01 1966-09-27 Gen Electric Method of production of a dispenser cathode
US3269804A (en) * 1963-11-01 1966-08-30 Gen Electric Dispenser cathode and method for the production thereof
DE1539156B2 (en) * 1965-06-30 1976-09-23 Siemens AG, 1000 Berlin und 8000 München GETTER PUMP ARRANGEMENT FOR ELECTRON BEAM TUBES AND METHOD FOR MANUFACTURING GETTERABLE SINTER SHAPED BODIES
US3558966A (en) * 1967-03-01 1971-01-26 Semicon Associates Inc Directly heated dispenser cathode
FR2469792A1 (en) * 1979-11-09 1981-05-22 Thomson Csf THERMO-IONIC CATHODE, ITS MANUFACTURING METHOD, AND ELECTRONIC TUBE INCORPORATING SUCH A CATHODE
US4837480A (en) * 1988-03-28 1989-06-06 Hughes Aircraft Company Simplified process for fabricating dispenser cathodes
DE3913338C2 (en) * 1989-04-22 1999-12-02 Aeg Elektronische Roehren Gmbh Investment material, in particular for cathodes of electron tubes, method for producing such an investment material and use of such an investment material

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1552310A (en) * 1923-07-24 1925-09-01 Gen Electric Electrode for discharge tubes
US1720000A (en) * 1926-07-28 1929-07-09 Westinghouse Lamp Co Vibration and sag resistant filament
US1883898A (en) * 1928-12-14 1932-10-25 Westinghouse Electric & Mfg Co Thermionic cathode
US1895354A (en) * 1929-10-23 1933-01-24 Gen Electric Resintered hard metal composition
US2179960A (en) * 1931-11-28 1939-11-14 Schwarzkopf Paul Agglomerated material in particular for electrical purposes and shaped bodies made therefrom
US2246166A (en) * 1939-02-02 1941-06-17 Gen Electric Sintered hard-metal alloy for implements and tools
NL91132C (en) * 1951-11-29
AT187993B (en) * 1953-11-18 1956-12-10 Philips Nv Cathode body for an electric discharge tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3169862A (en) * 1961-01-10 1965-02-16 Ciba Ltd Process for making anodes for electrolytic condensers

Also Published As

Publication number Publication date
NL101006C (en)
BE560502A (en)
US2929133A (en) 1960-03-22
DE1040701B (en) 1958-10-09
FR1201432A (en) 1959-12-30

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