DE882733C - Cathode for electron tubes - Google Patents

Cathode for electron tubes

Info

Publication number
DE882733C
DE882733C DES21807A DES0021807A DE882733C DE 882733 C DE882733 C DE 882733C DE S21807 A DES21807 A DE S21807A DE S0021807 A DES0021807 A DE S0021807A DE 882733 C DE882733 C DE 882733C
Authority
DE
Germany
Prior art keywords
cathode
electron tubes
filaments
heating
tubular mesh
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
DES21807A
Other languages
German (de)
Inventor
Werner Dr Phil Jacobi
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.)
Siemens AG
Original Assignee
Siemens 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
Priority claimed from DES4023A external-priority patent/DE851832C/en
Application filed by Siemens AG filed Critical Siemens AG
Priority to DES21807A priority Critical patent/DE882733C/en
Application granted granted Critical
Publication of DE882733C publication Critical patent/DE882733C/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Solid Thermionic Cathode (AREA)

Description

Gegenstand des Patentes 85 i 832 ist eine Kathode für Elektronenröhren, die aus einem aus den Heizfäden gebildeten rohrförmigen Maschengitter mit ihre beiden Enden abschließenden Metallringen oder -scheiben, welche gleichzeitig zur Stromzuführung dienen, besteht.The subject of patent 85 i 832 is a cathode for electron tubes, the tubular mesh formed from the filaments with both of them Ends of final metal rings or disks, which at the same time for power supply serve, exists.

Gemäß d:er Erfindung sollen -die Heizfäden aus Bändern bestehen. Diese Ausbildung der Heizfäden bietet die Möglichkeit, in den Fällen, in denen z. B. bei Anwendung niedriger Heizspannungen Heizdrähte eines verhältnismäßig großen Querschnittes benötigt werden, ebenfalls eine rohrförmige Maschengitterkathode nach dem Hauptpatent mit an den Kreuzungsstellen verschweißten Heizfäden zum Einsatz zu bringen, denn die bandförmigen Heizfäden lassen sich an den Kreuzungsstellen besser verschweißen - als mit Rücksicht auf die niedrige Heizspannung vorzusehende starke Heizfäden kreisförmigen Querschnittes, Sind die Bänder flach ausgebildet, so wird außerdem noch die wirksame emittierende Fläche der Kathode vergrößert.According to the invention, the heating filaments should consist of tapes. These Training of the filaments offers the possibility in those cases where z. B. at Use of low heating voltages, heating wires with a relatively large cross-section are required, also a tubular mesh cathode according to the main patent to use with heating filaments welded at the crossing points, because the ribbon-shaped heating filaments can be welded better at the crossing points - Than strong filaments to be provided in consideration of the low heating voltage circular cross-section, if the bands are flat, so will also the effective emitting area of the cathode is also increased.

Die Zeichnung zeigt eine Maschengitterkathode i mit den als Bänder ausgebildeten Heizfäden 2.The drawing shows a mesh cathode i with the as bands trained filaments 2.

Claims (1)

PATENTANSPRUCH: Kathode für Elektronenröhren, die aus einem aus den Heizfäden gebildeten rohrförmigen Maschengitter mit ihre beiden Enden abschließenden Metallringen oder -scheiben, welche gleichzeitig zur Stromzuführung dienen, besteht, nach Patent 8.51 832-, dadurch gekennzeichnet, daß die Heizfäden aus Bändern bestehen.PATENT CLAIM: Cathode for electron tubes made from one of the Filaments formed tubular mesh with their two ends terminating Metal rings or disks, which also serve to supply power, exist, according to patent 8.51 832-, characterized in that the heating filaments consist of ribbons.
DES21807A 1950-05-17 1951-02-06 Cathode for electron tubes Expired DE882733C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES21807A DE882733C (en) 1950-05-17 1951-02-06 Cathode for electron tubes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES4023A DE851832C (en) 1950-05-17 1950-05-17 Cathode for electron tubes
DES21807A DE882733C (en) 1950-05-17 1951-02-06 Cathode for electron tubes

Publications (1)

Publication Number Publication Date
DE882733C true DE882733C (en) 1953-07-13

Family

ID=25994726

Family Applications (1)

Application Number Title Priority Date Filing Date
DES21807A Expired DE882733C (en) 1950-05-17 1951-02-06 Cathode for electron tubes

Country Status (1)

Country Link
DE (1) DE882733C (en)

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