GB919419A - Improvements in or relating to impregnated cathodes suitable for use in electric discharge tubes - Google Patents

Improvements in or relating to impregnated cathodes suitable for use in electric discharge tubes

Info

Publication number
GB919419A
GB919419A GB208260A GB208260A GB919419A GB 919419 A GB919419 A GB 919419A GB 208260 A GB208260 A GB 208260A GB 208260 A GB208260 A GB 208260A GB 919419 A GB919419 A GB 919419A
Authority
GB
United Kingdom
Prior art keywords
carbon
layer
carbide
carbonized
tungsten
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
GB208260A
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.)
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 GB919419A publication Critical patent/GB919419A/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
    • H01J9/047—Cathodes having impregnated bodies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249955—Void-containing component partially impregnated with adjacent component

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
GB208260A 1959-01-23 1960-01-20 Improvements in or relating to impregnated cathodes suitable for use in electric discharge tubes Expired GB919419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78860359 US2972078A (en) 1959-01-23 1959-01-23 Carburization of dispenser cathodes

Publications (1)

Publication Number Publication Date
GB919419A true GB919419A (en) 1963-02-27

Family

ID=25144990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB208260A Expired GB919419A (en) 1959-01-23 1960-01-20 Improvements in or relating to impregnated cathodes suitable for use in electric discharge tubes

Country Status (9)

Country Link
US (1) US2972078A (enrdf_load_stackoverflow)
AT (1) AT219166B (enrdf_load_stackoverflow)
BE (1) BE586842A (enrdf_load_stackoverflow)
CH (1) CH402197A (enrdf_load_stackoverflow)
DE (1) DE1094887B (enrdf_load_stackoverflow)
DK (1) DK93307C (enrdf_load_stackoverflow)
FR (1) FR1245997A (enrdf_load_stackoverflow)
GB (1) GB919419A (enrdf_load_stackoverflow)
NL (1) NL108689C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225158A (en) * 1988-11-12 1990-05-23 Samsung Electronic Devices Manufacturing dispenser cathodes of electron guns

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2242986C3 (de) * 1972-09-01 1981-05-07 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Glühkathode
DE2842079A1 (de) * 1978-09-27 1980-04-03 Siemens Ag Vorratskathode, insbesondere metall- kapillar-kathode
GB2100502B (en) * 1978-11-30 1983-08-03 Varian Associates Dispenser cathodes
DE3334971A1 (de) * 1983-09-27 1985-04-18 Siemens AG, 1000 Berlin und 8000 München Vorratskathode, insbesondere metall-kapillar-kathode
KR920003185B1 (ko) * 1990-01-31 1992-04-23 삼성전관 주식회사 디스펜서형 음극 및 그 제조방법
FR2803088B1 (fr) * 1999-12-22 2002-02-01 Thomson Tubes & Displays Procede d'assemblage d'une cathode pour tube a rayons cathodiques

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922244A (en) * 1930-09-13 1933-08-15 Fansteel Prod Co Inc Electrode and method of making the same
BE509019A (enrdf_load_stackoverflow) * 1951-02-08
CH305546A (de) * 1951-02-16 1955-02-28 Siemens Ag Kathode für elektrische Entladungsgefässe.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225158A (en) * 1988-11-12 1990-05-23 Samsung Electronic Devices Manufacturing dispenser cathodes of electron guns
GB2225158B (en) * 1988-11-12 1993-01-13 Samsung Electronic Devices Manufacturing method for dispenser cathode of an electron gun

Also Published As

Publication number Publication date
BE586842A (fr) 1960-07-22
CH402197A (de) 1965-11-15
US2972078A (en) 1961-02-14
FR1245997A (fr) 1960-11-10
AT219166B (de) 1962-01-10
NL108689C (enrdf_load_stackoverflow) 1900-01-01
DK93307C (da) 1962-04-30
DE1094887B (de) 1960-12-15

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