GB931890A - Cathode assembly - Google Patents

Cathode assembly

Info

Publication number
GB931890A
GB931890A GB17508/62D GB1750862D GB931890A GB 931890 A GB931890 A GB 931890A GB 17508/62 D GB17508/62 D GB 17508/62D GB 1750862 D GB1750862 D GB 1750862D GB 931890 A GB931890 A GB 931890A
Authority
GB
United Kingdom
Prior art keywords
coil
sleeve
heater
spaced
aluminium oxide
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
GB17508/62D
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB931890A publication Critical patent/GB931890A/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

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

931,890. Thermionic cathodes. SYLVANIA ELECTRIC PRODUCTS Inc. May 7, 1962 [May 5, 1961], No. 17508/62. Class 39 (1). A cathode assembly includes a heater 21 spaced from a cylindrical, emissive sleeve 22 by a resilient coil 12 of insulated wire which has spaced exterior portions 13 bearing against the sleeve 22 and spaced internal portions 15 engaging the heater. As shown, coil 12 is formed by winding tungsten or molybdenum wire, coated before or afterwards with aluminium oxide, round a mandrel of square or other polygonal crosssection, and then allowing it to unwind slightly to a diameter slightly greater than that of sleeve 22. After inserting the heater within coil 12, these two elements may be coated with alundum before inserting them in cathode sleeve 22 which may have an internal coating 24 of aluminium oxide. Alternatively, an elliptically wound spacer coil may be used or a coil of repetitive hour-glass contour.
GB17508/62D 1961-05-05 1962-05-07 Cathode assembly Expired GB931890A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US108118A US3119946A (en) 1961-05-05 1961-05-05 Cathode

Publications (1)

Publication Number Publication Date
GB931890A true GB931890A (en) 1963-07-17

Family

ID=22320417

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17508/62D Expired GB931890A (en) 1961-05-05 1962-05-07 Cathode assembly

Country Status (2)

Country Link
US (1) US3119946A (en)
GB (1) GB931890A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982145A (en) * 1975-02-24 1976-09-21 General Electric Company Filament supports for tubular electric incandescent lamps
JP2000507039A (en) * 1997-01-15 2000-06-06 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Incandescent lamp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831140A (en) * 1953-10-12 1958-04-15 Sylvania Electric Prod Cataphoretically coated heater insulator assembly

Also Published As

Publication number Publication date
US3119946A (en) 1964-01-28

Similar Documents

Publication Publication Date Title
GB1041282A (en) Cathode for electron discharge device
GB950237A (en) An electric high-pressure discharge lamp
GB987483A (en) A cathode for a high-pressure discharge lamp
GB931890A (en) Cathode assembly
GB1216584A (en) Directly heated cathode
GB982206A (en) Thermionic cathodes
GB1014340A (en) Improvements in or relating to electrodes for gaseous discharge lamps
GB891913A (en) Thermionic valve cathode
US2367579A (en) Gaseous conduction discharge device
GB1009870A (en) Crossed-field electric discharge tube
GB975023A (en) Cathode grid assembly for electron gun
GB976646A (en) Electron gun for and method of gettering cathode ray tubes
GB967273A (en) Improvements in cathodes and in the method of their manufacture
GB766881A (en) Improvements relating to cathodes for high power valves
GB1006098A (en) A gas-discharge lamp having a coiled cathode
US2650319A (en) Grid-controlled ignitor for ignitrons
US2733173A (en) Activated cathodes for electron
GB835343A (en) Improvements in or relating to thermionic electrodes and electric discharge lamps
GB927298A (en) Thermionic valve cathode
GB806257A (en) Caps for electron tubes or other components having flexible lead-ins
GB1047337A (en)
GB867021A (en) Improvements relating to indirectly heated cathodes for electron discharge devices
GB958224A (en) Improvements in or relating to electric discharge tubes having an indirectly-heated cathode
GB1264548A (en)
JPS5528208A (en) Cathode ray tube