Abstract: An arc magnetron is described in which an edge magnet arrangement is displaceable in the axial direction relative to a preferably fixedly mounted center pole permanent magnet so that a cathode sputtering process and/or an arc discharge process can be realized in dependence on the relative position of the edge magnet arrangement and the center pole magnet.

Abstract: Method and device for coating cavities of objects such as the internal surface of tubes with the cathode arc deposition method. This method is used such that material from the cathode surface migrates and is deposited on the surface of said cavity. To this end the cathode is introduced into the cavity. The device for performing the above method comprises at least a cathode arc deposition device. The object to be coated can be connected as anode although it is also possible that a separate anode is provided in which case a voltage is applied to the object being negative with regard to the voltage applied to the cathode.

Abstract: A high voltage rectifier with provisions for rapidly limiting or discontinuing the current flow in response to the occurrence of overcurrents and rapidly restoring such current when the overcurrents cease. The rectifier comprises one or more stages, each stage comprising a rectifier fed from a secondary transformer winding, a subsequent smoothing capacitor, a first switch serving as a direct D.C. converter for regulation of the output voltage, a choke and capacitor for smoothing the current and a second switch, activated by overcurrents, such that the smoothing chokes can be switched over by the second switch into a first recovery circuit wherein, prior to each switching off of the respective second switch the associated first switch is switched on for a predetermined period of time and then switched off.

Abstract: Process and device for creating a conducting channel for igniting of an arc in an environment with reduced pressure by means of high voltage. During ignition the conditions for ignition of the arc are optimized at a number of points between the parts where the arc has to be ignited. This optimization can comprise increasing of pressure and/or adding ignition-promoting gases.

Abstract: A method and device are provided to prevent grooves from occurring on a cathode surface of a cathode arc discharge evaporating device by adding a second movement to a first rotational movement of a magnetic field generator within the device, which enables the arc spot to scan a substantial portion of the cathode surface.

Abstract: Cathode arc discharge evaporating device having a body of revolution as cathode. The target surface is arranged at the outside surface of the body of revolution. To control movement of the arc spot a magnetic field generating device is provided inside the body of revolution, which may be moveable with respect to the cathode.