GB388684A - Improvements relating to electron discharge tubes or thermionic valves - Google Patents

Improvements relating to electron discharge tubes or thermionic valves

Info

Publication number
GB388684A
GB388684A GB25186/32A GB2518632A GB388684A GB 388684 A GB388684 A GB 388684A GB 25186/32 A GB25186/32 A GB 25186/32A GB 2518632 A GB2518632 A GB 2518632A GB 388684 A GB388684 A GB 388684A
Authority
GB
United Kingdom
Prior art keywords
cathode
thermionic valves
improvements relating
discharge tubes
electron discharge
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
GB25186/32A
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 GB388684A publication Critical patent/GB388684A/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

  • Electron Sources, Ion Sources (AREA)

Abstract

388,684. Thermionic valves. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Sept. 9, 1932, No. 25186. Convention date, Nov. 30, 1931. [Class 39 (i).] A tubular indirectlyheated cathode 14 enclosing a heater is supported from a cross-piece 9 and has two or more external leads 20, 23 to the cathode body proper arranged so that a current passing between them traverses substantially the whole cathode surface. A current may be passed through the cathode to remove occluded gases or to activate the coating. The lead 23 may then be snipped off just below the pinch before the cap is placed on the bulb. The invention is stated to be particularly applicable to cathodes having heater voltages of 15 volts or more.
GB25186/32A 1931-11-30 1932-09-09 Improvements relating to electron discharge tubes or thermionic valves Expired GB388684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE388684X 1931-11-30

Publications (1)

Publication Number Publication Date
GB388684A true GB388684A (en) 1933-03-02

Family

ID=6371310

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25186/32A Expired GB388684A (en) 1931-11-30 1932-09-09 Improvements relating to electron discharge tubes or thermionic valves

Country Status (2)

Country Link
FR (1) FR745823A (en)
GB (1) GB388684A (en)

Also Published As

Publication number Publication date
FR745823A (en) 1933-05-17

Similar Documents

Publication Publication Date Title
US1878341A (en) Voltage regulator
GB381720A (en) Improvements in or relating to x-ray tubes
GB388684A (en) Improvements relating to electron discharge tubes or thermionic valves
US2034571A (en) Electrical discharge device and method of operating same
GB380672A (en) Improvements in or relating to discharge tubes for the rectification of alternating current
GB413166A (en) Improvements in and relating to controllable gas or vapour filled discharge tubes
US2195505A (en) Electron discharge device
GB358649A (en) Improvements relating to electron discharge tubes of thermionic valves
US2130191A (en) Electron discharge device and circuit
GB329152A (en) Improvements relating to thermionic valves or electron discharge tubes
GB230497A (en) Improvements in or relating to x-ray tubes
GB434643A (en) Improvements in or relating to electron discharge devices
GB364093A (en) Improvements relating to electron discharge devices such as electric rectifying tubes and the like
GB521942A (en) Methods and means for rapid heating of electron discharge tube filaments
GB377041A (en) Improvements in or relating to gasfilled discharge tubes
GB354141A (en) Improvements in or relating to electric gas- or vapour-filled arc discharge tubes
GB289975A (en) Improvements in or relating to electric vacuum or gas-filled tubes
GB381491A (en) Improvements relating to thermionic valves or electron discharge tubes
GB395660A (en) Improvements in and relating to electric discharge devices
GB269341A (en) Improvements in or relating to the manufacture of oxide cathodes for discharge tubes
US1938636A (en) Alternating current heated thermionic device
GB268986A (en) Improvements in or relating to electric incandescent lamps
GB382520A (en) Improvements relating to electron discharge tubes
US1771717A (en) Thermionic tube
GB346096A (en) Improvements relating to electron discharge tubes or thermionic valves