GB867021A - Improvements relating to indirectly heated cathodes for electron discharge devices - Google Patents

Improvements relating to indirectly heated cathodes for electron discharge devices

Info

Publication number
GB867021A
GB867021A GB3120358A GB3120358A GB867021A GB 867021 A GB867021 A GB 867021A GB 3120358 A GB3120358 A GB 3120358A GB 3120358 A GB3120358 A GB 3120358A GB 867021 A GB867021 A GB 867021A
Authority
GB
United Kingdom
Prior art keywords
improvements relating
discharge devices
electron discharge
indirectly heated
heated cathodes
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
GB3120358A
Inventor
Thomas William Myford
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3120358A priority Critical patent/GB867021A/en
Priority to FR806311A priority patent/FR1236862A/en
Publication of GB867021A publication Critical patent/GB867021A/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
    • H01J1/24—Insulating layer or body located between heater and emissive material

Abstract

867,021. Electric heating elements. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 15, 1959 [Sept. 30, 1958], No. 31203/58. Class 39(3). [Also, in Group XL(a)] A heating element 4 for an indirectly-heated cathode may comprise a tungsten helix 5 with a coating 7 of powdered refractory insulation, e.g. alumina and silica, applied by cataphoresis and sintered thereon. As shown the element 4 is in the form of a bundle of substantially parallel limbs and is spaced and further insulated from the cathode sheath by a fused silica helix 8. Suitable dimensions are given. Specification 847,019 is referred to.
GB3120358A 1958-09-30 1958-09-30 Improvements relating to indirectly heated cathodes for electron discharge devices Expired GB867021A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3120358A GB867021A (en) 1958-09-30 1958-09-30 Improvements relating to indirectly heated cathodes for electron discharge devices
FR806311A FR1236862A (en) 1958-09-30 1959-09-29 Indirect heating cathode for electron tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3120358A GB867021A (en) 1958-09-30 1958-09-30 Improvements relating to indirectly heated cathodes for electron discharge devices

Publications (1)

Publication Number Publication Date
GB867021A true GB867021A (en) 1961-05-03

Family

ID=10319554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3120358A Expired GB867021A (en) 1958-09-30 1958-09-30 Improvements relating to indirectly heated cathodes for electron discharge devices

Country Status (2)

Country Link
FR (1) FR1236862A (en)
GB (1) GB867021A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740606A (en) * 1971-09-01 1973-06-19 Gte Sylvania Inc Vibration suppressor in cathode assembly for electron discharge device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL284356A (en) * 1962-10-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740606A (en) * 1971-09-01 1973-06-19 Gte Sylvania Inc Vibration suppressor in cathode assembly for electron discharge device

Also Published As

Publication number Publication date
FR1236862A (en) 1960-07-22

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