Abstract: A method for fabricating transformers each having a core made from a lamination body of strips made of an amorphous magnetic alloy comprises the steps of forming a ring-like lamination body using a grindstone cutter and a gas coolant to obtain a developed lamination body, shaping the developed lamination into a substantially rectangular core, assembling windings with the core using a sliding tool for inserting leg portions of the core into windows of windings, covering the core with a core cover and mounting a grounding member so as to ground the core to the ground.

Abstract: A stationary induction electric apparatus and a method for manufacturing the apparatus is disclosed. The apparatus comprises a reinforcement frame to be mounted on an inner peripheral surface of a rectangular core, a protective cover for covering both of the rectangular core and the reinforcement frame, a reinforcement band to be wound on an outer peripheral surface of the rectangular core on which the protective cover is mounted, and windings to be fitted on the leg portion of the rectangular core on which the reinforcement frame, the protective cover, and the reinforcement band are mounted.

Abstract: A method for manufacturing rectangular wound cores including a step of forming at least one developed lamination body by cutting off at least one ring-like lamination body, a step for applying adhesive agent to one of cut ends of each developed lamination body, a step forming lamination blocks each of which is comprised of plural lamination units shifted in the length-wise direction by a predetermined distance and a step for jointing both ends of each of lamination unit in an overlapping state by winding each lamination block around a shaping bobbin.

Abstract: A stationary induction electric apparatus and a method for manufacturing the apparatus. The apparatus comprises a reinforcement frame to be mounted on an inner peripheral surface of a rectangular core, a protective cover for covering both of the rectangular core and the reinforcement frame, a reinforcement band to be wound on an outer peripheral surface of the rectangular core on which the protective cover is mounted, and windings to be fitted on the leg portion of the rectangular core on which the reinforcement frame, the protective cover, and the reinforcement band are mounted.

Abstract: In the present invention, there is disclosed a case for protecting a magnetic core having a substantially enclosed shape being constructed in combination with a case body comprising an inner and outer members which are adapted to cover the inner and outer peripheral surfaces of the magnetic core respectively, a bottom member being adapted to cover the bottom surface of the magnetic core which has a substantially "U" shaped cross section and a cap member being adapted to cover the top surface of the magnetic core which has a substantially reversed "U" shaped cross section, which is characterized in that a taper surface is formed on each of the surfaces of the inner and outer members opposing to the inner and outer surfaces of the magnetic core respectively, said taper surface being so inclined as to contact to the opposed surface of the magnetic core at the middle portion thereof when seen in the axial direction of the core.

Abstract: A transformer with a toroidal magnetic core. The toroidal magnetic core is housed in an insulating case. The insulating case has a top and bottom annular winding frames. These frames provide radial winding conductor grooves. The top annular winding frame provides a plurality of grooves for guiding an inter-connecting conductor therein each of which is formed between two adjacent winding conductor grooves. The inter-connecting conductor is guided through said guiding groove to connect between the adjacent two unit coils.

Abstract: In the present invention, there is disclosed an electrical induction apparatus having a magnetic core unit being comprised of a toroidal magnetic core and at least one winding wound around the core and a casing for housing the magnetic core unit therein, comprising a support plate for supporting the bottom of the magnetic core unit having at least one opening, means for positioning the unit at a predetermined position in the casing being engageable to the opening of the support plate, a cylindrical member made of an insulating material which is so formed as to fit into the central hole of the unit, a mounting plate for fixing the unit being disposed on the top of the unit, an axial member passing through the central hole of the cylindrical member, one end of which is connected to the supporting plate and the other end of which is projected outwardly in the axial direction thereof, a nut means for fastening the mounting plate to hold the unit between the mounting plate and the support plate which is engageable