GB637382A - Improvements in and relating to electric discharge devices - Google Patents

Improvements in and relating to electric discharge devices

Info

Publication number
GB637382A
GB637382A GB5472/47A GB547247A GB637382A GB 637382 A GB637382 A GB 637382A GB 5472/47 A GB5472/47 A GB 5472/47A GB 547247 A GB547247 A GB 547247A GB 637382 A GB637382 A GB 637382A
Authority
GB
United Kingdom
Prior art keywords
lead
envelope
seal
end wall
supported
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
GB5472/47A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB637382A publication Critical patent/GB637382A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/32—Anodes
    • H01J19/34—Anodes forming part of the envelope
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0002—Construction arrangements of electrode systems
    • H01J2893/0003—Anodes forming part of vessel walls

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

637,382. Thermionic valves. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 25, 1947, No. 5472. Convention date, Feb. 27, 1946. [Class 39 (i)] An electric discharge device comprises an envelope including an annular metal end wall 7 having a re-entrant portion, a lead-in conductor 12 extending through the re-entrant portion of the envelope and supported therefrom by means including an insulating seal, and a cathode, comprising a plurality of elongated conducting elements 13, supported from the lead-in conductor and contained substantially within an anode structure 1 forming a part of the envelope. The lead-in 12 supports one end of the cathode elements 13 and houses a cathode tensioning spring 23 ; it may be hollow to allow the circulation of cooling fluid through tubes 27, 28. The other ends of the cathode elements are connected to washer 19 which is supported by the conducting cylinder 20 attached to the end wall 7. Cylinder 20 is preferably slotted as at 21 to minimize stresses caused by thermal expansion. The end wall 7 may have a metal ring 35 bonded to it, a further massive terminal ring 36 being screwed to 35. Ring 36 has a large heat capacity and assists in cooling the seal 10 ; it may be provided with passages for cooling fluid. A disc 37 connected to lead-in 12 is separated from ring 36 by an insulating washer 39 so that it is effectively connected to it for high-frequency currents. The grid is supported from a cylindrical metallic portion 6 of the envelope by a cone 33. A tube 43 provided with apertures 44 directed towards the seal may be used to cool the seal between the end wall 7 and the glass portion 8.
GB5472/47A 1946-02-27 1947-02-25 Improvements in and relating to electric discharge devices Expired GB637382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US637382XA 1946-02-27 1946-02-27

Publications (1)

Publication Number Publication Date
GB637382A true GB637382A (en) 1950-05-17

Family

ID=22051163

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5472/47A Expired GB637382A (en) 1946-02-27 1947-02-25 Improvements in and relating to electric discharge devices

Country Status (1)

Country Link
GB (1) GB637382A (en)

Similar Documents

Publication Publication Date Title
US2489891A (en) Cesium electric discharge device
US2288380A (en) High frequency radio tube
GB560244A (en) Improvements in electric discharge lamps
US2380502A (en) Electronic discharge device
US2489872A (en) Envelope and electrode mounting structure for electric discharge devices
US2408239A (en) Electronic discharge device
US2310936A (en) Electron discharge apparatus
GB637382A (en) Improvements in and relating to electric discharge devices
US2697796A (en) Electron tube structure
US2688707A (en) Electron tube structure
US2396772A (en) Electronic discharge device
US2517334A (en) Electron tube having annular envelope
US2324766A (en) Electron discharge device
US2397854A (en) Electron discharge device
GB562178A (en) Improvements in and relating to electric discharge devices
US2447719A (en) Electron tube
US2067607A (en) Thermionic cathode space current tube
US2461125A (en) Electron discharge device utilizing cavity resonators
US2436649A (en) Electron tube of the toroidal type
US3152276A (en) Electron tube having coaxial terminals for an interiorly emissive cathode
US1666450A (en) holweck
US2603762A (en) Ultrahigh-frequency electron discharge device
US2367966A (en) Electrode support
GB603570A (en) Gettering arrangement for electron discharge devices
US2561866A (en) High-pressure metal vapor electric discharge lamp