Abstract: An Fe-based soft magnetic alloy essentially consisting of an Fe-based alloy including fine crystal grains used for such as a magnetic core. An average size of the fine crystal grains is controlled to 300.ANG. or less. Each of the fine crystal grains is composed of a body-centered cubic phase at least partially including a super lattice. This alloy has a high saturation flux density and excellent soft magnetic characteristics such as a low iron loss and a high magnetic permeability. This alloy is suitable as a core material for various kinds of choke coils.

Abstract: Fe-based soft magnetic alloy having excellent soft magnetic characteristics with high saturated magnetic flux density, characterized in that it has fine crystal grains dispersed in an amorphous phase and is expressed by the general formula:Fe.sub.100-a-b-c Cu.sub.a M.sub.b Y.sub.cwhere:"M" is at least one or more selected from elements of groups IVa, Va, VIa of the periodic table, Mn, Co, Ni, Al, and the Platinum group,"Y" is at least one or more selected from Si, B, P, or Cand 3<a.ltoreq.8 (atomic %)0.1<b.ltoreq.83.1.ltoreq.a+b.ltoreq.1215.ltoreq.c.ltoreq.28.Also described is a dust core made from an alloy powder having fine crystal grains dispersed in an amorphous phase and expressed by the formulaFe.sub.100-a-b-c-d-e Cu.sub.a M'.sub.b M".sub.c Si.sub.d B.sub.

Abstract: A magnetic core comprises at least one layer of magnetic film composed of an amorphous alloy and an electrically insulating film made of polyimide. Powder materials having a property for alleviating mutual influence between the magnetic thin film and the insulating film during a heat treatment thereof are stuck to a surface of the magnetic film or the insulating film. The magnetic film and the electrically insulating film are alternately wound up in a predetermined shape with powder material interposed therebetween to thereby form a magnetic core.

Abstract: A thin Co-based amorphous alloy strip is produced, the conditions for production being controlled to those specified by the invention. The thin strip has an extremely small thickness and few pinholes. The extremely small thickness of less than 4.8 .mu.m notably enhances soft magnetic properties such as permeability and core loss in the high frequency range. Additionally, magnetic cores and electromagnetic apparatuses can be produced from the thin Co-based amorphous alloy strips.

Abstract: A magnetic core has a wound-up laminated body of thin metal tape which has rolled face and free face (unrolled face) wherein rolled faces or free faces of the thin metal tape are arranged adjacently facing each other in at least a part of said woundup laminated body.

Abstract: An Fe-based soft magnetic alloy represented substantially by the general formula:Fe.sub.a Cu.sub.b V.sub.c Si.sub.d B.sub.ewherein a, b, c, d, and e are numbers respectively satisfying the following formula:a+b+c+d+e=100 (atomic percentage)0.01.ltoreq.b.ltoreq.3.50.01.ltoreq.c.ltoreq.1510.ltoreq.d.ltoreq.253.ltoreq.e.ltoreq.1217.ltoreq.d+e.ltoreq.30),and the alloy structure thereof having fine crystal grains, for example, in the range of 20 to 95% in area ratio. This Fe-based soft magnetic alloy has high saturation magnetic flux density, and excellent soft magnetic characteristics. Also, it is excellent in the processability and anti-shock properties.

Abstract: An Fe-based soft magnetic alloy essentially consisting of an Fe-based alloy including fine crystal grains used for such as a magnetic core. An average size of the fine crystal grains is controlled to 300 .ANG. or less. Each of the fine crystal grains is composed of a body-centered cubic phase at least partially including a super lattice. This alloy has a high saturation flux density and excellent soft magnetic characteristics such as a low iron loss and a high magnetic permeability.

Abstract: Fe-based soft magnetic alloy having excellent soft magnetic characteristics with high saturated magnetic flux density, characterized in that it has fine crystal grains and is expressed by the general formula:(Fe.sub.1-a-b Cu.sub.a M.sub.b).sub.100-c Y.sub.cwhere "M" is at least one or more selected from rare earth elements, "Y" is at least one or more selected from Si, B, P, and C, and "a", "b" and "c" are as follows:0.005.ltoreq.a.ltoreq.0.050.005.ltoreq.b.ltoreq.0.115.ltoreq.c.ltoreq.28 (at %).Also described is a method of treating the alloy to segregate fine crystal grains which comprises heat treating the alloy for a period of from one minute to ten hours at a temperature of from 50.degree. C. below the crystallization temperature to 120.degree. C. above the crystallization temperature.

Abstract: A magnetic core has a wound-up laminated body of thin metal tape which has rolled face and free face (unrolled face) wherein rolled faces or free faces of the thin metal tape are arranged adjacently facing each other in at least a part of said wound-up laminated body.

Abstract: A noise suppression device is disclosed which comprises a toroid-shaped device comprising an amorphous magnetic alloy ribbon wound with plural turns, or ring-shaped pieces formed from an amorphous magnetic alloy ribbon and laminated in plural number, and a through-hole through which an electrical line or lead is inserted, and having a value of Do satisfying the relation of L<Do.ltoreq.5L when an average diameter of said device is Do, provided that the average diameter is an arithmetic mean value of the outer diameter of the device and the diameter of the through-hole, and the largest length at a cross section of said line or said lead, L, is smaller than the diameter of the through-hole.The noise suppression device according to this invention is improved in heat-dissipation properties with a great decrease in breakage, and has a superior noise suppresion effect.

Abstract: To obtain a high permeability magnetic core, the core is made of a 5 to 25 .mu.m thick ribbon of a Co-based amorphous alloy with a Curie temperature Tc between 120.degree. C. and 270.degree. C., and further heat treated at a temperature below Tc within a magnetic field (1 Oe or more) applied in the lateral direction of the thin ribbon. Further, the saturation magnetostriction constant of the ribbon should be -2 to 1.times.10.sup.-6.

Abstract: A pressure sensing device of this invention has a first diaphragm for defining a first pressure transmission chamber within a housing assembly with a pressure transmission fluid sealed therein and a second diaphragm for defining a second pressure transmission chamber within the housing assembly with a pressure transmission fluid sealed therein. The pressures of first and second measuring fluids both act upon the side opposite to that on which the corresponding diaphragm faces the corresponding pressure transmission chamber. The first and second diaphragms are both formed of a metal sheet having the modulus of 2,000 to 15,000 Kg/mm.sup.2. A pressure-sensing element is disposed between the pressure transmission chambers to sense a differential pressure level between the pressure transmission chambers.

Abstract: There are disclosed a torque sensor having a rotary shaft and a thin strip of an amorphous magnetic alloy which has a great magnetic strain constant windingly fixed on the rotary shaft and detecting a torque in a non-contact style by a variation in magnetic properties of the thin strip of the amorphous alloy, characterized in that the amorphous alloy is an iron-based amorphous alloy having a crystallization temperature of 450.degree. C. or more, and a method for manufacturing the same, characterized in that an inductive magnetic anisotropy had been previously given to the thin strip and then the thin strip is windingly fixed on the rotary shaft.The torque sensor according to the present invention permits measuring a large torque with a good accuracy in an extensive temperature, and is manufactured with ease.

Abstract: There is disclosed an amorphous alloy for a magnetic core material represented by the formula(Co.sub.1-x.sbsb.1.sub.-x.sbsb.2 Fe.sub.x.sbsb.1 M.sub.x.sbsb.2).sub.x.sbsb.3 B.sub.x.sbsb.4 Si.sub.100-x.sbsb.3.sub.-x.sbsb.4wherein M is at least one element selected from the group consisting of Ti, V, Cr, Mn, Ni, Zr, Nb, Mo, Ru, Hf, Ta, W and Re, and x.sub.1, x.sub.2, x.sub.3 and x.sub.4 are numbers which satisfy relations of 0.ltoreq.x.sub.1 .ltoreq.0.10, 0.ltoreq.x.sub.2 .ltoreq.0.10, 70.ltoreq.x.sub.3 .ltoreq.79 and 5.ltoreq.x.sub.4 .ltoreq.9, respectively.According to the present invention, it could be provided an amorphous alloy suitable for a magnetic core material of a magnetic amplifier in which its coercive force is as low as 0.4 oersted or less at a high frequency of 20 KHz or more, particularly even at 50 KHz, and its rectangular ratio is as much as 85% or more.