certain angle since this improves centering of the tube relative to the connecting members the connecting members placed onto these high voltage leads 3 3 39 of the tube are electrically conductively connected with their metal jacket portions to the cylindrical metal member 1 of the tube and are connected to ground the sides or surfaces of the connecting member adjacent the outer frontal surface of the annular ceramic discs 2 may either be open or closed if the surface of the connecting members adjacent the surface of the associated ceramic disc i e the mating or connecting surface is open the open frontal face of the connecting part is sealed in a gas or liquid tight manner to the frontal surface of the ceramic disc 2 or to the metal jacket member 1 and then the interior of the connecting member is filled with an insulating gas or oil the connecting members may contain couplings or possibly transformers or directly contain the high voltage cables referring now to fig4 there is shown an apparatus including an x ray tube as shown in fig1 to which two connecting members 4 as described above are connected by axially pressing same onto the leads 3 3 39 each of the connecting members 4 has a metal outer jacket 6 as well as.