CA990778A - Electric discharge tube comprising a directly heatable cathode - Google Patents

Electric discharge tube comprising a directly heatable cathode

Info

Publication number
CA990778A
CA990778A CA163,524A CA163524A CA990778A CA 990778 A CA990778 A CA 990778A CA 163524 A CA163524 A CA 163524A CA 990778 A CA990778 A CA 990778A
Authority
CA
Canada
Prior art keywords
discharge tube
electric discharge
directly heatable
heatable cathode
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.)
Expired
Application number
CA163,524A
Other versions
CA163524S (en
Inventor
Joannes C. Van Warmerdam
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA990778A publication Critical patent/CA990778A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape
CA163,524A 1972-02-17 1973-02-12 Electric discharge tube comprising a directly heatable cathode Expired CA990778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7202069A NL7202069A (en) 1972-02-17 1972-02-17

Publications (1)

Publication Number Publication Date
CA990778A true CA990778A (en) 1976-06-08

Family

ID=19815386

Family Applications (1)

Application Number Title Priority Date Filing Date
CA163,524A Expired CA990778A (en) 1972-02-17 1973-02-12 Electric discharge tube comprising a directly heatable cathode

Country Status (8)

Country Link
US (1) US3806753A (en)
JP (1) JPS557655B2 (en)
CA (1) CA990778A (en)
CH (1) CH552281A (en)
DE (1) DE2304771C3 (en)
FR (1) FR2172354B1 (en)
GB (1) GB1414392A (en)
NL (1) NL7202069A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1042105A1 (en) * 1980-02-05 1983-09-15 Организация П/Я Х-5263 Grid-type filamentary cathode for vacuum tubes and its manufacture method
FR2532468A1 (en) * 1982-08-31 1984-03-02 Thomson Csf IMPROVEMENT TO CATHODES WITH DIRECT HEATING
JPS6224307U (en) * 1985-07-29 1987-02-14
JPH0446165Y2 (en) * 1985-08-23 1992-10-29
JPS6239958U (en) * 1985-08-23 1987-03-10
FR2708379B1 (en) * 1993-07-27 1995-09-01 Thomson Tubes Electroniques Cathode with rapid switching on and off of the heating and electronic grid tube comprising such a cathode.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB830352A (en) * 1956-08-03 1960-03-16 Standard Telephones Cables Ltd Improvements in or relating to the mounting of thermionic cathodes
US2928978A (en) * 1956-08-03 1960-03-15 Int Standard Electric Corp Mounting of thermionic cathodes
GB987461A (en) * 1962-05-31 1965-03-31 Standard Telephones Cables Ltd Thermionic valves
US3560791A (en) * 1967-09-08 1971-02-02 Siemens Ag Mesh cathode for electron tubes

Also Published As

Publication number Publication date
JPS557655B2 (en) 1980-02-27
GB1414392A (en) 1975-11-19
NL7202069A (en) 1973-08-21
DE2304771B2 (en) 1977-09-15
FR2172354B1 (en) 1977-12-30
DE2304771A1 (en) 1973-08-23
JPS4890669A (en) 1973-11-26
US3806753A (en) 1974-04-23
DE2304771C3 (en) 1982-03-04
CH552281A (en) 1974-07-31
FR2172354A1 (en) 1973-09-28

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