AT107225B - Hot cathode arrangement for high vacuum tubes, especially X-ray tubes. - Google Patents

Hot cathode arrangement for high vacuum tubes, especially X-ray tubes.

Info

Publication number
AT107225B
AT107225B AT107225DA AT107225B AT 107225 B AT107225 B AT 107225B AT 107225D A AT107225D A AT 107225DA AT 107225 B AT107225 B AT 107225B
Authority
AT
Austria
Prior art keywords
tubes
high vacuum
hot cathode
cathode arrangement
ray tubes
Prior art date
Application number
Other languages
German (de)
Original Assignee
Phoenix Roentgenroehrenfabrike
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 Phoenix Roentgenroehrenfabrike filed Critical Phoenix Roentgenroehrenfabrike
Application granted granted Critical
Publication of AT107225B publication Critical patent/AT107225B/en

Links

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
 EMI1.2 
 Sammelvorrichtung versehen sind, wobei dieses ganze Kathodengebilde durch   stabförmige   Leiter mittels   Metallkappen, gegebenenfalls auch noch   unter Verwendung von Schrauben od. dgl.. in der Vakuumröhre befestigt ist. An diesem Kathodengebilde finden, wenn die es enthaltende Vakuumiöhre mit sehr hohen Spannungen betlieben wild, wie sie etwa bei   Röntgenröhren   Anwendung finden, augenscheinlich 
 EMI1.3 
 Entladungen, sogenannte autoelektionisehe Entladungen, statt, welche   schädlich   sind. 



   Während   nämlich   die auf dem Glühkörper selbst beinhenden Entladungen, d. i. die von dem Glilh-   körp : r   selbst   ausgehenden   oder verursachten Kathodenstrahlen, durch die Gesamtanordnung so geführt werden, dass Kathodenstrahlen nur in der   gewünschten   Weise auf den für sie bestimmten Teil der Antikathodenfläche auftreffen, gelangen die autoelektronischen   Kathodenstiahlen, welche von   den Kanten und Flächen grosser   Ktümmung ausgehen, an   die verschiedensten Stellen innerhalb der Röhre, auch an die Glaswand, an der sie erfahrungsgemäss Gas frei machen.

   Daduich wild das Vakuum veimindeit und nicht nur das Verhalten der Vakuumröhle in der bekannten Weise   ungleichmässig,   sondelll es kommt, wie die Erfahrung bestätigt, auch leicht zum Durchschlagenwerden der Glaswand, ganz besonders wenn die Antikathode durch Kühlung auf verhältnismässig niedriger Temperatur erhalten wild. 



   Ein Fortschritt ist hier durch die   neue Kathodenanordnung herbeigefühlt,   die in einem Aus- 
 EMI1.4 
 vermieden wird. 



   Zur   Vet meidung von Rauhigkeiten   der Obertläche, welche ebenfalls zu autoelektionisehen Entladungen Veranlassung geben, ist es vorteilhaft, die   Oberfläche   des Rohres c möglichst zu glätten, also etwa zu polieren oder auf andere Weise auf Hochglanz zu   bringen,   was bei   geeigneter   Wahl des Stoffes für das Rohr c, etwa Stahl oder Nickel, leicht ausführbar ist. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 
 EMI1.1
 
 EMI1.2
 Collecting device are provided, this entire cathode structure by rod-shaped conductors by means of metal caps, if necessary also using screws or the like .. is attached in the vacuum tube. In this cathode structure, if the vacuum tube containing it remains with very high voltages, such as are used, for example, in X-ray tubes, it is evident
 EMI1.3
 Discharges, so-called auto-selection discharges, take place, which are harmful.



   While the discharges on the incandescent body itself, d. i. The cathode rays emanating or caused by the incandescent body itself are guided through the overall arrangement in such a way that cathode rays only hit the part of the anti-cathode surface intended for them in the desired manner, the autoelectronic cathode rays, which are larger from the edges and surfaces, arrive Curvature originate at various points within the tube, including the glass wall, where experience has shown that they release gas.

   This prevents the vacuum and not only the behavior of the vacuum tube unevenly in the familiar way, but, as experience confirms, the glass wall is easily broken through, especially when the anticathode is kept by cooling at a relatively low temperature.



   A progress has been brought about here by the new cathode arrangement, which is
 EMI1.4
 is avoided.



   In order to avoid roughness of the surface, which also give rise to auto-selective discharges, it is advantageous to smooth the surface of the tube c as much as possible, i.e. to polish it or to bring it to a high gloss in some other way, which with a suitable choice of the material for the Tube c, such as steel or nickel, is easy to implement.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRÜCHE : EMI1.5 <Desc/Clms Page number 2> EMI2.1 körpers anschliesst. PATENT CLAIMS: EMI1.5 <Desc / Clms Page number 2> EMI2.1 body connects. 4. Anordnung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die Oberfläche geringer Krümmung glatt gemacht ist. EMI2.2 4. Arrangement according to claim 1, 2 or 3, characterized in that the surface of low curvature is made smooth. EMI2.2
AT107225D 1925-01-13 1925-05-11 Hot cathode arrangement for high vacuum tubes, especially X-ray tubes. AT107225B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE107225X 1925-01-13

Publications (1)

Publication Number Publication Date
AT107225B true AT107225B (en) 1927-09-10

Family

ID=5650936

Family Applications (1)

Application Number Title Priority Date Filing Date
AT107225D AT107225B (en) 1925-01-13 1925-05-11 Hot cathode arrangement for high vacuum tubes, especially X-ray tubes.

Country Status (1)

Country Link
AT (1) AT107225B (en)

Similar Documents

Publication Publication Date Title
AT107225B (en) Hot cathode arrangement for high vacuum tubes, especially X-ray tubes.
DE821091C (en) Electrode holder for an electron tube
DE539588C (en) Gluehkathodenroentgenroehre with pointed anode and ring-shaped, the anode with a small distance surrounding the cathode
DE374018C (en) High vacuum vent tube
DE947322C (en) X-ray apparatus with a high-voltage protective housing enclosing the X-ray tube and the high-voltage transformer
DE467467C (en) Discharge tubes
DE557568C (en) Bright annealing furnace for wires u. like
AT144144B (en) Device for making objects visible in the dark.
DE746722C (en) Electrical discharge vessel, inside of which several live conductors with insulating support parts are attached
DE461847C (en) X-ray tube
DE691593C (en) Method for casting spread wire rope ends in cones, sleeves or the like.
AT112930B (en) X-ray tube with high vacuum for diagnostic purposes.
DE962188C (en) Electric discharge tubes with mercury cathode and gas filling
DE581227C (en) Anode for high vacuum discharge vessels, especially for X-ray tubes
DE327257C (en) X-ray tube
DE881699C (en) High voltage valve with hollow anode
AT131021B (en) Metal vapor rectifier with anode grids arranged in anode protection tubes.
DE731123C (en) Electrode for cathode ray tubes
DE627788C (en) Ignition in metal vapor discharge devices, in particular metal vapor rectifiers, with ignition electrodes and a cathode designed as a wick to reduce the development of vapor
DE403202C (en) Device for attaching the caps to suspension isolators
DE407433C (en) Device for attaching the cathode to the anticathode in X-ray tubes
DE479792C (en) Mercury vapor rectifier, in which the metal cathode vessel is attached in an insulated manner using a ring made of ceramic material
DE628380C (en) Meatlldampfentladungsgefaess with a wick-like insert inserted into the cathode
DE444643C (en) Rod-shaped tension insulator
AT125916B (en) Hot cathode x-ray tube with a pointed anode.