A heat treatment apparatus for a laminated body of amorphous alloy ribbon includes: a lamination jig that holds the laminated body of amorphous alloy ribbon; two heating plates that sandwich the laminated body from upper and lower surfaces in a lamination direction without coming into contact with the lamination jig; and a heating control apparatus that controls a heating temperature of the two heating plates.

An apparatus for manufacturing a heat sealing-type rotational laminated core, includes an upper mold and a lower mold, and forming and stacking individual laminar members, the individual laminar members being formed by having a strip which is sequentially transferred on the upper portion of the lower mold undergone a piercing process and a blanking process by punches mounted on the upper mold.

A method for manufacturing a laminated iron core includes setting a blanking position on a strip-shaped workpiece for iron core pieces each including a yoke piece part having a linear shape and a magnetic pole piece part extending from the yoke piece part, such that a pair of iron core pieces are opposed each other and the magnetic pole piece part of one iron core piece is arranged between adjacent magnetic pole piece parts of the other iron core piece among the pair of iron core pieces, simultaneously blanking a front end side of the magnetic pole piece part and a back surface side of the yoke piece part of the one iron core piece from the strip-shaped workpiece before simultaneously blanking those of the other iron core piece from the strip-shaped workpiece, and blanking the iron core pieces from the strip-shaped workpiece.

Soft magnetic core, in which permeabilities that occur at least two different locations of the core are different.

Soft magnetic core, in which permeabilities that occur at least two different locations of the core are different.

Each lamination of the lamination stack comprises at least one assembly of coupling elements, said assembly comprising one insertion clamp, one receiving clamp and at least one receiving window, said coupling elements maintaining the same relative positioning from one another, the insertion clamp and the receiving clamp being defined by respective portions of the lamination axially projecting to the same side of the latter, each insertion clamp of a lamination being fitted, by interference, in the interior of a receiving clamp of an adjacent lamination, and each receiving clamp of a lamination being housed in the receiving window of at least one lamination of the stack.

Methods are described for constructing a mechanical resonating structure by applying an active layer on a surface of a compensating structure. The compensating structure comprises one or more materials having an adaptive resistance to deform that reduces a variance in a resonating frequency of the mechanical resonating structure, wherein at least the active layer and the compensating structure form a mechanical resonating structure having a plurality of layers of materials A thickness of each of the plurality of layers of materials results in a plurality of thickness ratios therebetween.

A soft magnetic alloy is represented by a composition formula (Fe.sub.1-xA.sub.x).sub.aSi.sub.bB.sub.cCu.sub.dM.sub.e, wherein A is at least one of Ni and Co, M is one or more selected from the group consisting of Nb, Mo, V, Zr, Hf, and W, and 82.4≤a≤86, 0.2≤b≤2.4, 12.5≤c≤15.0, 0.05≤d≤0.8, 0.4≤e≤1.0, and 0≤x≤0.1 in at %, and has a structure in which crystal grains having a grain size of 60 nm or less are present in an amorphous phase.

A composite material, in particular for use in a transformer comprising a first and a second grain-oriented electric strip layer and a polymeric layer arranged therebetween is disclosed. The polymeric layer includes a crosslinked acrylate-based copolymer of high molecular weight and has a layer thickness in the range from 3 to 10 μm.

The present invention provides a core for an electric current detector in which a plurality of gaps can be formed while the paring of core pieces is maintained, and a method for manufacturing the same. A core for an electric current detector 10 according to the present invention includes: a pair of core pieces 20 and 23 that are obtained by cutting an annular core main body 12 in a radial direction at two positions and are arranged such that cross-sectional surfaces 21 and 24 are opposed to each other with a first gap 26 and a second gap 28 being interposed therebetween; and a first partial molding 30 and a second partial molding 40 that are made of resin and cover portions of the peripheral surfaces of the cross-sectional surfaces of the core pieces opposed to each other with the first gap and the second gap being interposed therebetween. The first partial molding includes a bridge portion 33 that serves as a connection portion and spans the gap.