Patent ID: 7646281

Claim:
An apparatus for an electric arc welder, comprising: a first electromagnetic device including a first core assembly, wherein the first core assembly includes a first stack of laminations which are press-fitted 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, wherein the center portion of the first core assembly includes a diamond-shaped symmetrical air gap; a second electromagnetic device including a second core assembly, wherein the second core assembly has a first stack laminations which are press-fitted 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 interlocking engagement means for allowing the two core assemblies of the electromagnetic devices to be press-fitted into interlocking engagement with each other.