GB444844A - Improvements in or relating to thermionic valves - Google Patents

Improvements in or relating to thermionic valves

Info

Publication number
GB444844A
GB444844A GB6398/35A GB639835A GB444844A GB 444844 A GB444844 A GB 444844A GB 6398/35 A GB6398/35 A GB 6398/35A GB 639835 A GB639835 A GB 639835A GB 444844 A GB444844 A GB 444844A
Authority
GB
United Kingdom
Prior art keywords
cathode
anode
thermionic valves
relating
emissive
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
GB6398/35A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB444844A publication Critical patent/GB444844A/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
    • 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
    • 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
    • H01J2893/001—Non-constructive schematic arrangements

Landscapes

  • Physical Or Chemical Processes And Apparatus (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Spark Plugs (AREA)

Abstract

444,844. Thermionic valves. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Feb. 28, 1935, No. 6398. Convention date, March 1, 1934. [Class 39 (i)] An indirectly heated cathode 1 has an emissive surface constituted by two intersecting convex surface to form a cylinder with the cross-section as shown. The emissive material is applied to a metal layer 4 on an insulating body. The grid 5 and anode 7 are arranged parallel to the surface of the cathode; the anode may extend only to such lengths as to subtend arcs, which include the radii BR drawn from the centres O, O<1> of the convex surfaces through the ends of the cathode.
GB6398/35A 1934-03-01 1935-02-28 Improvements in or relating to thermionic valves Expired GB444844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET43654D DE635542C (en) 1934-03-01 1934-03-01 Discharge tubes with an indirectly heated cathode

Publications (1)

Publication Number Publication Date
GB444844A true GB444844A (en) 1936-03-30

Family

ID=7561564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6398/35A Expired GB444844A (en) 1934-03-01 1935-02-28 Improvements in or relating to thermionic valves

Country Status (4)

Country Link
DE (1) DE635542C (en)
FR (1) FR786029A (en)
GB (1) GB444844A (en)
NL (1) NL40533C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE857537C (en) * 1942-07-17 1952-12-01 Telefunken Gmbh Electric discharge tubes with indirectly heated cathode

Also Published As

Publication number Publication date
NL40533C (en) 1937-04-15
DE635542C (en) 1936-09-19
FR786029A (en) 1935-08-24

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