Patents Assigned to Firma WkS-Schweisstechnik Willy Kalnbach
  • Apparatus for generating and regulating welding currents
    Patent number: 4048467
    Abstract: Apparatus for generating and regulating welding currents, having primary and secondary circuits connected through a transformer, an anti-parallel connection of two thyristors in the primary circuit, a choke in parallel with this anti-parallel connection and means which shift the phase of the turn-on pulses in the case of a short-circuit on the secondary side and in switching on.
    Type: Grant
    Filed: January 8, 1976
    Date of Patent: September 13, 1977
    Assignee: Firma WkS-Schweisstechnik Willy Kalnbach
    Inventors: Josef Wertli, Paul Matter