Rotatable anode for an X-ray tube composed of a coated, porous body

A rotatable anode for an X-ray tube comprising a body composed of a porous, difficult to melt material enclosed in a sealed fashion within an enveloping layer of a difficult to melt material, characterized by the porous body being of a material having a good thermal conductivity and a good thermal capacity and said porous body having its pores filled with a material having a good thermal conductance and being a good conductor of heat. The porous body is preferably a sintered porous body. The material of the porous body as well as the material of the enclosing layer are selected from a group consisting of tungsten, molybdenum, niobium, chromium, vanadium, titanium, carbon, alloys of these materials, and compounds of these materials. The filler material is preferably a metal selected from a group consisting of silver, gold, copper, aluminum, and alloys of these elements containing not less than a predominant proportion of at least one of these metals. The enveloping layer may be in the form ...

Rotary anode X-ray tube

In exemplary embodiments, the anode is driven by an induction motor, between the stator and rotor of which the wall of the vacuum envelope of the tube is disposed. To reduce the overall length and the lever actions of the weight of the anode which act on the bearing which are disadvantageous in this construction, the disclosure provides an annular anode which is disposed in the same plane with the drive rotor. The rotor and stator can here be surrounded by the ring of the anode or they can be secured externally about the latter. X-ray tubes in accordance with the disclosure are particularly suited for use for the purpose of medical x-ray examination.

Rotary anode X-ray tube

A rotary anode X-ray tube has an anode connected at one end of a shaft which is magnetically mounted within the X-ray tube at its opposite end, the shaft simultaneously forming a rotor connected to a drive system for rotating the anode. The X-ray tube housing is formed by a number of connected components, two such components being spaced at opposite ends of the rotor, with the rotor extending therethrough, and each having stop bearings which are normally not in contact with the rotor, but which serve to limit movement of the rotor and the anode connected thereto, in the event of a malfunction in the magnetic mounting. Integration of the anode shaft and the drive rotor enable placement of the stop bearings at locations which minimize the lever action of the rotor-shaft-anode combination thereby significantly improving stability of the total assembly.

Rotary anode X-ray tube

Tubular electromagnetic components are mounted on the drive shaft of the ary anode of an X-ray tube and external magnet windings are provided both for maintaining the drive shaft in an axial position corresponding to a working position of the anode and for shifting the drive shaft to open a slip contact at one end thereof, thus providing a magnetic switch for the anode supply voltage. In addition, windings are provided through which a controlled current flows to provide a radially stabilized position for the shaft and thus constitute magnetic bearings that are free of friction. When one of the contacts of the magnetic switch is spring-mounted, the coil that does the switching can also be used to adjust the axial position of the anode so as to work with a different cathode.

Rotary anode for an X-ray tube

A layered pressed and sintered anode body consisting of a support body of a tungsten-molybdenum alloy having a first layer of tungsten or tungsten alloy on the surface which is impinged by electrons and having a second layer of a higher melting point material on the other side whose tensile strength at the elastic limit is greater, at temperatures of 1400° to 1600° C, than the tensile stresses occurring at these temperatures to avoid warping of the anode.

ROTATING ANODE FOR RADIOGENIC TUBES

The invention relates to an X-ray rotating anode whose body has radial recesses which cross under the path of the focus spot and those which cut through the path of the focus spot. These recesses are used to compensate for stresses which are caused during the production of X-ray radiation by the heating of the anode which occurs at the same time. However, in the case of such unstressed anodes, it is still desirable to increase the load capacity. According to the invention, this is possible in that the holes (15) are broken towards the focus spot path (9, 10) and the plate (8) is a ring which is at least 6 mm thick, corresponds approximately to the width of the focus spot path and has a heat-insulating hub (16, 12) towards its rotation axis (11). An X-ray tube which is equipped with a rotating anode according to the invention is particularly suitable for use in medical X-ray diagnosis.

Rotary anode X-ray tube

In exemplary embodiments, the anode is driven by an induction motor, between the stator and rotor of which the wall of the vacuum envelope of the tube is disposed. To reduce the overall length and the lever actions of the weight of the anode which act on the bearing which are disadvantageous in this construction, the disclosure provides an annular anode which is disposed in the same plane with the drive rotor. The rotor and stator can here be surrounded by the ring of the anode or they can be secured externally about the latter. X-ray tubes in accordance with the disclosure are particularly suited for use for the purpose of medical x-ray examination.

X-RAY TUBE WITH ROTATING ANODE

TUBE A RAYONS X A ANODE TOURNANTE 14 DONT LE CORPS D'ANODE EST SITUE A UNE EXTREMITE D'UN ARBRE 16 DONT L'AUTRE EXTREMITE EST SUPPORTEE PAR VOIE MAGNETIQUE, DES PALIERS DE CAPTURE 23, 24 LUI ETANT ASSOCIES DANS LA REGION DU ROTOR. LE ROTOR 17 EST INCORPORE DANS L'ARBRE 16 ET LES PALIERS DE CAPTURE 23, 24 SONT ASSOCIES AUX DEUX EXTREMITES DUDIT ROTOR. APPLICATION A LA RADIOLOGIE. X-RAY TUBE WITH ROTATING ANODE 14 WHOSE ANODE BODY IS LOCATED AT ONE END OF A SHAFT 16 WHOSE OTHER END IS MAGNETICALLY SUPPORTED, CAPTURE BEARINGS 23, 24 HIM ASSOCIATED IN THE ROTOR REGION. THE ROTOR 17 IS INCORPORATED IN THE SHAFT 16 AND THE CAPTURE BEARINGS 23, 24 ARE ASSOCIATED WITH THE TWO ENDS OF THE SAID ROTOR. APPLICATION TO RADIOLOGY.

Process for producing a two-layer sintered contact piece on the basis of silver and copper

X-RAY TUBE WITH ROTATING ANODE

The anode of the rotating-anode X-ray tube has a power-supply contact in the rotating shaft. In the case of known embodiments, said power-supply contact consists of a touching contact between moving and stationary parts, so that friction and hence wear occur. In order to prevent the contact becoming worn out, a liquid-metal contact (14) is provided which has a pot containing liquid metal (16) into which a pin (17) dips as the mating contact, which pin (17) is constructed as an attachment on the rotating shaft (8) of the anode (7). Such a rotating-anode X-ray tube which is provided with a liquid-metal contact is particularly suitable for use in X-ray diagnosis apparatuses which can be highly loaded.

X-RAY TUBE WITH ROTATING ANODE

A.L'INVENTION CONCERNE UN TUBE A RAYONS X A ANODE TOURNANTE DE FORME ANNULAIRE, MONTEE EN SON CENTRE ET ENTRAINEE A L'AIDE D'UN MOTEUR, LA PAROI DU TUBE SE SITUANT ENTRE LE STATOR ET LE ROTOR DUDIT MOTEUR. B.LE CORPS D'ANODE ANNULAIRE 4, LE STATOR 14 ET LE ROTOR 5 SONT DISPOSES COAXIALEMENT L'UN DANS L'AUTRE. C.APPLICATION A L'INDUSTRIE RADIOLOGIQUE. A. THE INVENTION CONCERNS AN X-RAY TUBE WITH A ROTATING ANODE OF ANNULAR SHAPE, MOUNTED AT ITS CENTER AND DRIVEN BY A MOTOR, THE WALL OF THE TUBE SITUATED BETWEEN THE STATOR AND THE ROTOR OF THE MOTOR. B. THE ANNULAR ANODE BODY 4, STATOR 14 AND ROTOR 5 ARE ARRANGED COAXIALLY INTO ANOTHER. C. APPLICATION TO THE RADIOLOGICAL INDUSTRY.

X-RAY TUBE WITH ROTATING ANODE