GB402041A - Improvements in or relating to thermionic valves or electron discharge tubes - Google Patents

Improvements in or relating to thermionic valves or electron discharge tubes

Info

Publication number
GB402041A
GB402041A GB475232A GB475232A GB402041A GB 402041 A GB402041 A GB 402041A GB 475232 A GB475232 A GB 475232A GB 475232 A GB475232 A GB 475232A GB 402041 A GB402041 A GB 402041A
Authority
GB
United Kingdom
Prior art keywords
anode
rods
cathode
grid
screen
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
GB475232A
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
Priority to GB475232A priority Critical patent/GB402041A/en
Publication of GB402041A publication Critical patent/GB402041A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

402,041. Electron - discharge tubes. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Feb. 17, 1932, No. 4752. Void [Abridged as open to inspection under Sect. 91 of the Acts, May 10, 1932]. [Class 39 (i).] A thermionic valve or electron discharge tube for generating, receiving or amplifying electrical oscillations is provided with cathode, a control grid, an anode of grid form and a screen grid mounted beyond the anode, such screen grid being preferably earthed or otherwise maintained at a potential below that of the anode. The tube shown comprises a directly heated cathode 12 mounted within a control grid 11 which is mounted within an anode 9 surrounded by a screen grid 13. The anode 9 consists of wires wound around rods 10 supported from a metal ring 8 on the usual stem 7. The cathode 12 consists of a wire having a core of refractory material such as tungsten and an electron-emitting coating such as barium oxide. The screen grid 13 consists of wires wound about rods 14, supported, with the interposition of insulating glass beads 18, from the rods 10. A glass rod 15 carried by the rods 10 carries the supports for the control grid 11 and supports the cathode 12 through spring hooks 16. One of the rods 10 is provided with a container for a getter substance such as magnesium. The screen 13 may be in conductive connection with the cathode 12.
GB475232A 1932-02-17 1932-02-17 Improvements in or relating to thermionic valves or electron discharge tubes Expired GB402041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB475232A GB402041A (en) 1932-02-17 1932-02-17 Improvements in or relating to thermionic valves or electron discharge tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB475232A GB402041A (en) 1932-02-17 1932-02-17 Improvements in or relating to thermionic valves or electron discharge tubes

Publications (1)

Publication Number Publication Date
GB402041A true GB402041A (en) 1933-11-23

Family

ID=9783106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB475232A Expired GB402041A (en) 1932-02-17 1932-02-17 Improvements in or relating to thermionic valves or electron discharge tubes

Country Status (1)

Country Link
GB (1) GB402041A (en)

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