GB1522387A - Method of manufacturing a dispenser cathode and dispenser cathode manufactured according to said method - Google Patents

Method of manufacturing a dispenser cathode and dispenser cathode manufactured according to said method

Info

Publication number
GB1522387A
GB1522387A GB4380075A GB4380075A GB1522387A GB 1522387 A GB1522387 A GB 1522387A GB 4380075 A GB4380075 A GB 4380075A GB 4380075 A GB4380075 A GB 4380075A GB 1522387 A GB1522387 A GB 1522387A
Authority
GB
United Kingdom
Prior art keywords
dispenser cathode
scandate
polished
manufacturing
manufactured according
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
GB4380075A
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 Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1522387A publication Critical patent/GB1522387A/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

Landscapes

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

Abstract

1522387 Cathode materials and processing PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 24 Oct 1975 [9 Jan 1975] 43800/75 Heading H1D The emitting surface of a dispenser cathode comprising a porous compressed metal body containing Ba scandate is polished to remove any surface layers of the scandate. Subsequent activating results in a layer of Be 2 O 3 and BaO a few molecules thick. The body is formed by compressing at 20 Î 10<SP>3</SP> kg/cm<SP>2</SP> a mixture of W and Ba scandate powder and heating in H 2 to 1,550‹ C. The emitting force is polished with an Al 2 O 3 plate, cleaned ultrasonically and activated by firing at 1,200‹ C. in H 2 . The body is mounted in a Mo cylinder for use in T.V. display and camera tubes.
GB4380075A 1975-01-09 1975-10-24 Method of manufacturing a dispenser cathode and dispenser cathode manufactured according to said method Expired GB1522387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7500248A NL7500248A (en) 1975-01-09 1975-01-09 PROCEDURE FOR MANUFACTURING A PRESSED COMPLIANCE CATHOD AND COMPLIANCE CREDIT MANUFACTURED IN ACCORDANCE WITH THIS PROCESS.

Publications (1)

Publication Number Publication Date
GB1522387A true GB1522387A (en) 1978-08-23

Family

ID=19822961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4380075A Expired GB1522387A (en) 1975-01-09 1975-10-24 Method of manufacturing a dispenser cathode and dispenser cathode manufactured according to said method

Country Status (5)

Country Link
JP (1) JPS5193659A (en)
CA (1) CA1046131A (en)
FR (1) FR2297490A1 (en)
GB (1) GB1522387A (en)
NL (1) NL7500248A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173943A (en) * 1985-04-18 1986-10-22 Noblelight Limited Improvements in and relating to cathodes
EP1367620A1 (en) * 2002-05-31 2003-12-03 Thomson Licensing S.A. Cathode emissive body for an impregnated cathode of an electron tube

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8201371A (en) * 1982-04-01 1983-11-01 Philips Nv METHODS FOR MANUFACTURING A SUPPLY CATHOD AND SUPPLY CATHOD MANUFACTURED BY THESE METHODS
JPH0850849A (en) * 1994-05-31 1996-02-20 Nec Kansai Ltd Cathode member and electronic tube using it

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173943A (en) * 1985-04-18 1986-10-22 Noblelight Limited Improvements in and relating to cathodes
EP1367620A1 (en) * 2002-05-31 2003-12-03 Thomson Licensing S.A. Cathode emissive body for an impregnated cathode of an electron tube
FR2840450A1 (en) * 2002-05-31 2003-12-05 Thomson Licensing Sa CATHODO-EMISSIVE BODY FOR CATHODE IMPREGNATED WITH ELECTRONIC TUBE
US6979942B2 (en) 2002-05-31 2005-12-27 Thomson Licensing Cathode emissive body for an impregnated cathode of an electron tube

Also Published As

Publication number Publication date
NL7500248A (en) 1976-07-13
DE2558784B2 (en) 1977-05-26
CA1046131A (en) 1979-01-09
FR2297490A1 (en) 1976-08-06
FR2297490B1 (en) 1980-03-28
JPS5193659A (en) 1976-08-17
DE2558784A1 (en) 1976-07-15
JPS5616499B2 (en) 1981-04-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee