GB301827A - - Google Patents

Info

Publication number
GB301827A
GB301827A GB34373/28A GB3437328A GB301827A GB 301827 A GB301827 A GB 301827A GB 34373/28 A GB34373/28 A GB 34373/28A GB 3437328 A GB3437328 A GB 3437328A GB 301827 A GB301827 A GB 301827A
Authority
GB
United Kingdom
Prior art keywords
shield
filament
cathode
gridlike
situated
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
GB34373/28A
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 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 Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Publication of GB301827A publication Critical patent/GB301827A/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)
  • Measuring Fluid Pressure (AREA)

Abstract

301,827. Telefunken Ges. f³r Drahtlose Telegraphie. Dec. 6, 1927, [Convention date]. Vacuum tubes.-In a thermionic valve &c. having an indirectly heated cathode, electromagnetic effects due to the alternating current employed are avoided by the use of a conducting shield 3 in which the heating filament 2 is enclosed, the shield being either of solid material or of gridlike formation and being situated between the heater and the cathode 1. The filament 2 is connected at one end to the shield, the current being supplied by leads m, n connected to the shield and the filament respectively. The shield is passed outside the envelope so that a fixed potential may be applied thereto.
GB34373/28A 1927-12-06 1928-11-22 Expired GB301827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE301827T 1927-12-06

Publications (1)

Publication Number Publication Date
GB301827A true GB301827A (en) 1929-10-31

Family

ID=31894304

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34373/28A Expired GB301827A (en) 1927-12-06 1928-11-22

Country Status (2)

Country Link
US (1) US1897229A (en)
GB (1) GB301827A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717975A (en) * 1951-03-30 1955-09-13 Wihtol Weltis Cathodes for electron tubes
BE547691A (en) * 1955-05-10
DE1146985B (en) * 1960-11-04 1963-04-11 Siemens Ag Semi-indirectly heated cathode for electron tubes
US3767958A (en) * 1971-12-23 1973-10-23 Gte Sylvania Inc Electron discharge device having increased heater-cathode breakdown voltage

Also Published As

Publication number Publication date
US1897229A (en) 1933-02-14

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