ApplicationNo. 386501 filed on 02/10/1995
US Classes:219/130.1, Including arc-power supplies336/60, Ventilating passages (e.g., by coil section or core part spacers)336/133Adjustable magnetic shunt
ExaminersPrimary: Shaw, Clifford C.
Attorney, Agent or Firm
International ClassB23K 009/10
Foreign Application Priority Data1994-02-14 JP
AbstractA transformer includes a stator core, primary coils, secondary coils, and heat radiating plates each of which projects outward from between interior layers of the primary coil and/or secondary coil. An A.C. arc welder includes the transformer therein, with a movable core which can move to and fro between the primary coils and secondary coils and which has different widths in the movable direction. An A.C. arc welder also includes openings for taking in air at a front portion of a case cover and a fan for exhausting air at a rear portion of the case cover.