Abstract: An apparatus for an electric arc welder comprising a first electromagnetic device including a first core assembly, wherein the first core assembly has a first stack of laminations which are press-fitted or snapped together into interlocking engagement with a complementary second stack of laminations so as to form two flux paths through the first core assembly, each of which passes through a center portion of the first core assembly; a second electromagnetic device, such as a transformer, including a second core assembly, wherein the second core assembly has a first stack of laminations which are press-fitted or snapped together into interlocking engagement with a complementary second stack of laminations so as to form two flux paths through the second core assembly, each of which passes through a center portion of the second core assembly; and wherein the two core assemblies of the electromagnetic devices are press-fitted or snapped together into interlocking engagement with each other.

Abstract: There is provided an improvement in an inverter power supply of the type including an output transformer of the type having a high permeability magnetic core, input winding means for applying input current pulses to the core; a first output winding wound on the core; and a second output winding wound on the core. The power supply further includes first and second output terminals and output circuit means for connecting the individual output windings to the terminals in a fashion that opposite polarity output current pulses induced in the output windings by the input current pulses are applied across the terminals in a preselected first polarity.

Abstract: A control circuit is provided for the output of a high frequency inverter of the type having an output transformer with a core, primary windings and a secondary winding with two sections for creating a first secondary current pulse of electrical current in one section when the primary windings magnetizes the core and a second secondary current pulse in the other of the secondary sections when the primary windings remagnetizes the core. By alternating switch means for passing current through the primaries to magnetize and remagnetize the core at a preselected rate the output current pulses are provided by the two sections of secondary windings. The control circuit of the present invention involves a modification of the output transformer secondary stage. A first auxiliary winding is connected to one of the secondary sections to create an auxiliary current pulse as the core of the transformer is magnetized.