GB299325A - Improvements in or relating to thermionic valves - Google Patents

Improvements in or relating to thermionic valves

Info

Publication number
GB299325A
GB299325A GB30547/28A GB3054728A GB299325A GB 299325 A GB299325 A GB 299325A GB 30547/28 A GB30547/28 A GB 30547/28A GB 3054728 A GB3054728 A GB 3054728A GB 299325 A GB299325 A GB 299325A
Authority
GB
United Kingdom
Prior art keywords
cathode
tube
envelope
led outside
relating
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
GB30547/28A
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 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 GB299325A publication Critical patent/GB299325A/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

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Hybrid Cells (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

299,325. Telefunken Ges. f³r Drahtlose Telegraphie. Oct. 21, 1927, [Convention date]. Vacuum tubes.-In a thermionic valve having an indirectly heated cathode, the resistance wire 3 or other heating body, which may be heated by alternating current, is screened lrom the cathode 1 by a metallic tube 4 wherein the wire 3 is carried by glass or quartz beads 5. The control grid 6 is arranged in known manner about the cathode as a spiral. The tube 4 is preferably led outside the envelope at both ends so that different potentials may be applied thereto. The Specification as open to inspection under Sect. 91 (3) (a) states also that one end only of the tube 4 may be led outside the envelope. This subject-matter does not appear in the Specification as accepted.
GB30547/28A 1927-10-21 1928-10-22 Improvements in or relating to thermionic valves Expired GB299325A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE299325X 1927-10-21

Publications (1)

Publication Number Publication Date
GB299325A true GB299325A (en) 1929-10-31

Family

ID=6091220

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30547/28A Expired GB299325A (en) 1927-10-21 1928-10-22 Improvements in or relating to thermionic valves

Country Status (4)

Country Link
US (1) US1941692A (en)
BE (1) BE354919A (en)
FR (1) FR661967A (en)
GB (1) GB299325A (en)

Also Published As

Publication number Publication date
US1941692A (en) 1934-01-02
BE354919A (en)
FR661967A (en) 1929-08-01

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