US1987424A - Filament for thermionic tube - Google Patents

Filament for thermionic tube Download PDF

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Publication number
US1987424A
US1987424A US624252A US62425232A US1987424A US 1987424 A US1987424 A US 1987424A US 624252 A US624252 A US 624252A US 62425232 A US62425232 A US 62425232A US 1987424 A US1987424 A US 1987424A
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US
United States
Prior art keywords
filament
sections
pair
thermionic
thermionic 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 - Lifetime
Application number
US624252A
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English (en)
Inventor
Wehnert Waldemar
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
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 filed Critical Telefunken AG
Application granted granted Critical
Publication of US1987424A publication Critical patent/US1987424A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J1/15—Cathodes heated directly by an electric current

Definitions

  • FIGs. lw-c show these forms of 1.
  • a filament construction for a thermionic filament and it is also indicated therein in what tube comprising a pair of inverted V-shaped fila- 10 way the filament supply and also the grounding ments arranged side by side in substantially the 10 is effected in these filaments when alternating same plane and electrically connected in series, current is employed by ways and means welland a pair of lead-in conductors connected to the known in the prior art. inner adjacent legs of said filaments for supplying It has been found that in so far as freedom alternating heating current thereto.
  • a filament construction for a thermionic 1 5 with alternating current it is solely the v-shaped tube comprising a pair of inverted V-shaped filafilament that will satisfy all requirements, wherements arranged side by side in substantially the as in the case of N- and W-shaped filaments, even same plane, a connection between the outer legs if the potentiometer ground is shifted to an exof the filaments, and a pair of lead-in conductors treme position in either direction, there still reconnected to the inner adjacent legs of said fila- 20 mains an unduly strong humming noise.
  • a filament construction fora thermionic tube this connection is that the adjacent filament parts comprising four coplanar electron emitting sechave the same fall of filament potential, and that tions, the first and second sections being electrithe cathode parts being geometrically farthest recally connected together at one of their ends, the 35 moved from the median line through the system third and fourth sections being similarly electriconstitute the electrical center of the filament cally connected together at one of their ends, a system.
  • a filament for a thermionic tube comprising order of magnitude as in the V-shaped filament.
  • FIG. 3 by way of example illustrates an arrange-' series, and a pair of conductors connected to two ment of a pair of inverted V-shaped filaments, of these sections for connection to an energizing comprising the sections e; f, g and h, the inner source, the arrangement being such that said secsections 5 and or having the lead-in conductors tions which have between them a maximum po- Z and m respectively connected thereto, and the tential difierence are so disposed that they are at outer sections e and it being electrically connected closer proximity to each other than the remain- 59 together in series as shown.
  • this arrangei Sections a o ea h t er With this arrangei Sections a o ea h t er.
  • a filament for a thermionic tube comprising tential difierence exists between the inner adiaf ur ele tron emit in se i ns le rically concent sections and g and that the outer sections nected in series, and a pair of conductors cone and it constitute the electrical center of the filanected to two of these sections for connection to ment system.
  • Fig. 4 illustrates the shape of the an energizing source, the arrangement being such that said sections which have between them a maximum potential difierence are so disposed that they are at closer proximity than the two filament sections which have between them the 5 least potential difference.
  • a filament for a thermionic tube comprising a plurality of sections electrically connected in series and so arranged that the two terminal sections to which the energizing source is adapted to be connected are disposed adjacent one another, and the intermediate sections of the electrical series being disposed farther apart and on either side of the terminal sections.

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  • Electron Sources, Ion Sources (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
US624252A 1931-08-13 1932-07-23 Filament for thermionic tube Expired - Lifetime US1987424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE394161X 1931-08-13

Publications (1)

Publication Number Publication Date
US1987424A true US1987424A (en) 1935-01-08

Family

ID=6395608

Family Applications (1)

Application Number Title Priority Date Filing Date
US624252A Expired - Lifetime US1987424A (en) 1931-08-13 1932-07-23 Filament for thermionic tube

Country Status (3)

Country Link
US (1) US1987424A (fr)
FR (1) FR740406A (fr)
GB (1) GB394161A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050235482A1 (en) * 2004-03-29 2005-10-27 Deaett Michael A Method for constructing antennas from textile fabrics and components

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050235482A1 (en) * 2004-03-29 2005-10-27 Deaett Michael A Method for constructing antennas from textile fabrics and components

Also Published As

Publication number Publication date
GB394161A (en) 1933-06-22
FR740406A (fr) 1933-01-26

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