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GB289860A - Indirectly heated incandescent cathode for a vacuum tube - Google Patents

Indirectly heated incandescent cathode for a vacuum tube

Info

Publication number
GB289860A
GB289860A GB13135/28A GB1313528A GB289860A GB 289860 A GB289860 A GB 289860A GB 13135/28 A GB13135/28 A GB 13135/28A GB 1313528 A GB1313528 A GB 1313528A GB 289860 A GB289860 A GB 289860A
Authority
GB
United Kingdom
Prior art keywords
filament
cylinder
supported
lead
vacuum tube
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
GB13135/28A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB289860A publication Critical patent/GB289860A/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

  • Solid Thermionic Cathode (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

289,860. Loewe, S. May 4, 1927, [Convention date]. Drawings to Specification. Vacuum tubes.-A cylindrical cathode is mounted around a straight or helical filament held in tension by a spring, and is supported on the filament by non-conducting members. In one arrangement, a nickel cylinder, coated with electron-emitting oxides or carrying thoriated tungsten filaments, is mounted by lugs on two mica discs, one of which is supported on a lead for an axial tungsten filament, and the other is supported on the filament or on the spring. A lead at one end of the cylinder is mounted on an irsulating bead on a filament lead, and the ether end of the cylinder is free to move under expansion. In a modification in which a long heating filament is used, intermediate steatite supports are arranged between the filament and cylinder.
GB13135/28A 1927-05-04 1928-05-04 Indirectly heated incandescent cathode for a vacuum tube Expired GB289860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE289860X 1927-05-04

Publications (1)

Publication Number Publication Date
GB289860A true GB289860A (en) 1929-04-25

Family

ID=6059926

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13135/28A Expired GB289860A (en) 1927-05-04 1928-05-04 Indirectly heated incandescent cathode for a vacuum tube

Country Status (3)

Country Link
BE (1) BE351068A (en)
GB (1) GB289860A (en)
NL (1) NL23005C (en)

Also Published As

Publication number Publication date
BE351068A (en)
NL23005C (en)

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