FR2172354A1 - - Google Patents

Info

Publication number
FR2172354A1
FR2172354A1 FR7305566A FR7305566A FR2172354A1 FR 2172354 A1 FR2172354 A1 FR 2172354A1 FR 7305566 A FR7305566 A FR 7305566A FR 7305566 A FR7305566 A FR 7305566A FR 2172354 A1 FR2172354 A1 FR 2172354A1
Authority
FR
France
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.)
Granted
Application number
FR7305566A
Other languages
French (fr)
Other versions
FR2172354B1 (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.)
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
Publication of FR2172354A1 publication Critical patent/FR2172354A1/fr
Application granted granted Critical
Publication of FR2172354B1 publication Critical patent/FR2172354B1/fr
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
FR7305566A 1972-02-17 1973-02-16 Expired FR2172354B1 (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FR2172354A1 true FR2172354A1 (en) 1973-09-28
FR2172354B1 FR2172354B1 (en) 1977-12-30

Family

ID=19815386

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7305566A Expired FR2172354B1 (en) 1972-02-17 1973-02-16

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532468A1 (en) * 1982-08-31 1984-03-02 Thomson Csf IMPROVEMENT TO CATHODES WITH DIRECT HEATING

Families Citing this family (5)

* 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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532468A1 (en) * 1982-08-31 1984-03-02 Thomson Csf IMPROVEMENT TO CATHODES WITH DIRECT HEATING
EP0107522A1 (en) * 1982-08-31 1984-05-02 Thomson-Csf Directly heated cathodes

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
CH552281A (en) 1974-07-31

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Legal Events

Date Code Title Description
ST Notification of lapse