Electrical converter and power supplies, in particular for induction purposes, for industrial lasers and for plasma processes; analogous electrical and/or digital control units and automatic controllers for converters; power supplies and converters, including direct current, medium frequency, radio frequency, high frequency generators and generators for very high frequencies; high frequency amplifiers; computer software for steering and/or regulating converters; electrical devices (generators) for plasma excitation, in particular for activating, etching and sputter processes, for plasma supported CVD-processes, for plasma supported PVD-processes, for plasma supported polymerisation, plasma cleaning and plasma diffusion; power supply units for excitation of lasers, in particular CO2 lasers; power supply units and combinational circuit parts, electric four-wire network for high frequency current supply, electric transmitters (oscillators), electric phase shifters, electric switch split, in particular high frequency converters, electric transformers, electric coils, electric inductors; pyrometers; fusion crucibles; electric cables and coaxial cables; scientific, optical, weighing, measuring, signalling apparatus and instruments; devices and instruments for transmitting, connecting, switching, storing, regulating and controlling of electricity; data processing devices and computers; electrical apparatus for sealing plastics, using electric induction; all aforementioned goods as far as included in this class