DE403492C - Arrangement and means for eliminating the uneven heating of the glow wires in electron tubes - Google Patents

Arrangement and means for eliminating the uneven heating of the glow wires in electron tubes

Info

Publication number
DE403492C
DE403492C DEM70541D DEM0070541D DE403492C DE 403492 C DE403492 C DE 403492C DE M70541 D DEM70541 D DE M70541D DE M0070541 D DEM0070541 D DE M0070541D DE 403492 C DE403492 C DE 403492C
Authority
DE
Germany
Prior art keywords
eliminating
arrangement
uneven heating
electron tubes
glow wires
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
DEM70541D
Other languages
German (de)
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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.)
Publication date
Priority to DEM70541D priority Critical patent/DE403492C/en
Priority claimed from GB21594/19A external-priority patent/GB154982A/en
Application granted granted Critical
Publication of DE403492C publication Critical patent/DE403492C/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
    • H01J1/135—Circuit arrangements therefor, e.g. for temperature control

Landscapes

  • Discharge Heating (AREA)

Description

Anordnung und Mittel zur Beseitigung der ungleichmäßigen Erhitzung der Glühdrähte in Elektronenröhren. Bei Glühkathodenröhren, wie sie zum Senden drahtloser Signale verwendet werden, wird das eine Ende des Fadens mit der Anode verbunden; wenn daher die Energie eine solche ist, daß die Aussendung des Elektronenstromes mit dem Strom vergleichbar ist, der zum Erhitzen des Fadens verwandt wird, wird der letztere ungleichmäßig erhitzt, weil der Emissionsstrom, welcher sich dem Heizstrom überlagert, an verschiedenen Punkten des Fadens verschieden ist.Arrangement and means of eliminating the uneven heating the filaments in electron tubes. With hot cathode tubes, such as those used for wireless transmission Signals are used, one end of the thread is connected to the anode; if therefore the energy is such that the emission of the electron stream is comparable to the current used to heat the filament the latter heated unevenly because the emission current, which is the heating current superimposed, is different at different points of the thread.

Gemäß der Erfindung wird, um die Ungleichmäßigkeit des Erhitzens zu verringern, mit dem Faden an einer Anzahl gleichmäßig längs des Fadens verteilter Punkte eine Anzahl von Widerständen verbunden, deren andere Enden miteinander verbunden sind und die Verbindung für die Anode bilden. Diese Widerstände müssen genügend groß sein, um zu verhindern, daß Teile des Fadens kurzgeschlossen werden. Durch Verwendung einer großen Anzahl von Widerständen kann man den Emissionsstrom annähernd gleichmäßig zwischen den Widerständen unterteilen und auf diese Weise eine gleichförmigere Erhitzung des Fadens erreichen. Die Widerstände und ihre gemeinsame Verbindung werden zweckmäßig innerhalb der Röhre angeordnet, so daß nur eine zusätzliche Einschmelzung notwendig wird.According to the invention, in order to reduce the unevenness of heating reduce, with the thread at a number evenly distributed along the thread Points connected a number of resistors, the other ends of which are connected together and form the connection for the anode. These resistances must be sufficient be large to prevent parts of the filament from shorting out. By Using a large number of resistors one can approximate the emission current divide evenly between the resistors and in this way a more uniform one Achieve heating of the thread. The resistances and their common connection will be expediently arranged within the tube, so that only one additional seal becomes necessary.

Die Erfindung ist in der Abbildung dargestellt.The invention is shown in the figure.

A ist ein Zickzackfaden mit den Widerständen B, die an verschiedene Punkte des Fadens angeschlossen sind, während ihre anderen Enden zu einer Leitung C geführt sind, deren Mittelpunkt mit der Anode D verbunden ist.A is a zigzag thread with resistors B connected to different Points of thread are connected, while their other ends form a wire C, the center of which is connected to the anode D.

Claims (1)

PATENTANSPRUCH: Anordnung und Mittel zur Beseitigung der ungleichmäßigen Erhitzung der Glühdrähte in Elektronenröhren, dadurch gekennzeichnet, daß der Elektronenstrom dem Glühdraht an verschiedenen Punkten, welche über seine ganze Länge verteilt sind, in der Weise zugeführt wird, daß die Anodenspannungsquelle über Widerstände mit diesen Punkten verbunden ist. Claim: Arrangement and means for eliminating the uneven heating of the filaments in electron tubes, characterized in that the electron current is fed to the filament at various points which are distributed over its entire length in such a way that the anode voltage source is connected to these points via resistors is.
DEM70541D 1919-09-03 Arrangement and means for eliminating the uneven heating of the glow wires in electron tubes Expired DE403492C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM70541D DE403492C (en) 1919-09-03 Arrangement and means for eliminating the uneven heating of the glow wires in electron tubes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEM70541D DE403492C (en) 1919-09-03 Arrangement and means for eliminating the uneven heating of the glow wires in electron tubes
GB21594/19A GB154982A (en) 1919-09-03 1919-09-03 Improvement in valves used for wireless transmission

Publications (1)

Publication Number Publication Date
DE403492C true DE403492C (en) 1924-10-06

Family

ID=25987917

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM70541D Expired DE403492C (en) 1919-09-03 Arrangement and means for eliminating the uneven heating of the glow wires in electron tubes

Country Status (1)

Country Link
DE (1) DE403492C (en)

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