CH552281A - ELECTRIC DISCHARGE TUBE WITH A DIRECT HEATABLE CATHODE. - Google Patents

ELECTRIC DISCHARGE TUBE WITH A DIRECT HEATABLE CATHODE.

Info

Publication number
CH552281A
CH552281A CH209173A CH209173A CH552281A CH 552281 A CH552281 A CH 552281A CH 209173 A CH209173 A CH 209173A CH 209173 A CH209173 A CH 209173A CH 552281 A CH552281 A CH 552281A
Authority
CH
Switzerland
Prior art keywords
discharge tube
electric discharge
direct
heatable cathode
cathode
Prior art date
Application number
CH209173A
Other languages
German (de)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of CH552281A publication Critical patent/CH552281A/en

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
CH209173A 1972-02-17 1973-02-14 ELECTRIC DISCHARGE TUBE WITH A DIRECT HEATABLE CATHODE. CH552281A (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
CH552281A true CH552281A (en) 1974-07-31

Family

ID=19815386

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209173A CH552281A (en) 1972-02-17 1973-02-14 ELECTRIC DISCHARGE TUBE WITH A DIRECT 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
CA990778A (en) 1976-06-08
US3806753A (en) 1974-04-23
DE2304771C3 (en) 1982-03-04
FR2172354A1 (en) 1973-09-28

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Legal Events

Date Code Title Description
PL Patent ceased