FR1152794A - Improvements to heating elements for electron tubes - Google Patents

Improvements to heating elements for electron tubes

Info

Publication number
FR1152794A
FR1152794A FR1152794DA FR1152794A FR 1152794 A FR1152794 A FR 1152794A FR 1152794D A FR1152794D A FR 1152794DA FR 1152794 A FR1152794 A FR 1152794A
Authority
FR
France
Prior art keywords
heating elements
electron tubes
tubes
electron
heating
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
Other languages
French (fr)
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Application granted granted Critical
Publication of FR1152794A publication Critical patent/FR1152794A/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
    • H01J1/22—Heaters
FR1152794D 1955-06-25 1956-06-22 Improvements to heating elements for electron tubes Expired FR1152794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1841655A GB833432A (en) 1955-06-25 1955-06-25 Improvements in or relating to indirectly heated cathodes for electron discharge devices and to heater elements therefor

Publications (1)

Publication Number Publication Date
FR1152794A true FR1152794A (en) 1958-02-25

Family

ID=10112066

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1152794D Expired FR1152794A (en) 1955-06-25 1956-06-22 Improvements to heating elements for electron tubes

Country Status (2)

Country Link
FR (1) FR1152794A (en)
GB (1) GB833432A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569768A (en) * 1968-11-21 1971-03-09 Sylvania Electric Prod Cathode sleeve effecting maximum heat transfer to top of cathode cap and minimum to cap wall
DE10211947A1 (en) * 2002-03-18 2003-10-16 Siemens Ag Thermionic emitter, especially for x-ray tubes, has magnetic field compensation arrangement with current generating magnetic field that substantially compensates field generated by heating current

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2147732B (en) * 1983-10-07 1987-11-04 English Electric Valve Co Ltd Improvements in or relating to travelling wave tubes
GB2192751B (en) * 1986-07-14 1991-02-13 Denki Kagaku Kogyo Kk Method of making a thermionic cathode structure.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569768A (en) * 1968-11-21 1971-03-09 Sylvania Electric Prod Cathode sleeve effecting maximum heat transfer to top of cathode cap and minimum to cap wall
DE10211947A1 (en) * 2002-03-18 2003-10-16 Siemens Ag Thermionic emitter, especially for x-ray tubes, has magnetic field compensation arrangement with current generating magnetic field that substantially compensates field generated by heating current

Also Published As

Publication number Publication date
GB833432A (en) 1960-04-27

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