GB616359A - Improvements in or relating to electric discharge tubes - Google Patents

Improvements in or relating to electric discharge tubes

Info

Publication number
GB616359A
GB616359A GB8925/46A GB892546A GB616359A GB 616359 A GB616359 A GB 616359A GB 8925/46 A GB8925/46 A GB 8925/46A GB 892546 A GB892546 A GB 892546A GB 616359 A GB616359 A GB 616359A
Authority
GB
United Kingdom
Prior art keywords
branches
relating
electric discharge
branch
discharge tubes
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
GB8925/46A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
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 Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB616359A publication Critical patent/GB616359A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

616,359. Thermionic valves. PHILIPS LAMPS, Ltd. March 22, 1946, No. 8925. Convention date, Oct. 14, 1941. [Class 39 (i)] In a thermionic valve the cathode is built up from three or more individual filament branches, each of which comprises one or more V's. Each branch is connected at one end to an external conductor individual to that branch, and at its other end to another external conductor. This construction enables the filament to be used on D.C. or single or polyphase A.C. without excessive hum. The Figure shows a construction suitable for use with three-phase alternating current. The three branches 1, 2, 3 are connected internally to a star point 7; the other ends of the branches and a connection from the star point are taken out through the wall of the envelope.
GB8925/46A 1941-10-14 1946-03-22 Improvements in or relating to electric discharge tubes Expired GB616359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL233017X 1941-10-14

Publications (1)

Publication Number Publication Date
GB616359A true GB616359A (en) 1949-01-20

Family

ID=19780087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8925/46A Expired GB616359A (en) 1941-10-14 1946-03-22 Improvements in or relating to electric discharge tubes

Country Status (3)

Country Link
BE (1) BE447545A (en)
CH (1) CH233017A (en)
GB (1) GB616359A (en)

Also Published As

Publication number Publication date
BE447545A (en)
CH233017A (en) 1944-06-30

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