Abstract: A rotation detector includes a semiconductor chip, a nonmagnetic case body, a biasing permanent magnet and a nonmagnetic cap fixed to the case body, wherein the case body has a joint surface, and the cap has an inside surface in contact with the joint surface. A method of manufacturing the rotation detector includes the following steps: assembling the semiconductor chip, the case body and the biasing permanent magnet into a unit; forming at least one groove adjacent to the joint surface so as to form a space between the joint surface and the inside surface when the cap is fixed to the case body; fixing the cap to the case body so that the inside surface of the cap can be in contact with the joint surface; irradiating a laser beam at portions behind the inside surface of the cap under a prescribed pressure to melt materials of the case body and the cap and to make melted materials flow to the space; and cooling the melted materials to re-crystallize.

Abstract: A rotation detector includes a semiconductor chip, a nonmagnetic case body, a biasing permanent magnet and a nonmagnetic cap fixed to the case body, wherein the case body has a joint surface, and the cap has an inside surface in contact with the joint surface. A method of manufacturing the rotation detector includes the following steps: assembling the semiconductor chip, the case body and the biasing permanent magnet into a unit; forming at least one groove adjacent to the joint surface so as to form a space between the joint surface and the inside surface when the cap is fixed to the case body; fixing the cap to the case body so that the inside surface of the cap can be in contact with the joint surface; irradiating a laser beam at portions behind the inside surface of the cap under a prescribed pressure to melt materials of the case body and the cap and to make melted materials flow to the space; and cooling the melted materials to re-crystallize.

Abstract: A stack of two different metals to be welded, one of which is harder than the other, and an additional soft metal placed on the harder metal is placed between a pair of horn tips (grip members) of an ultrasonic welder. The harder metal is covered with a soft metal layer of a high plastic fluidity. Serrations are formed on the surface of the horn tips to grip the softer metal and the additional metal tightly during ultrasonic vibration is applied.

Abstract: A wire bonding apparatus and method which enable fully automatic wire bonding between a connecting electrode on a circuit board and an external lead terminal while saving space to prevent enlargement of the package size.

Abstract: A blend of high-molecular and a low-molecular organic material contains the high-molecular organic material in a proportion smaller than that of the low-molecular organic material, and has a three-dimensionally continuous network skeleton structure formed by the high-molecular organic material. The structure preferably has an average cell or mesh diameter not exceeding 500 microns. The removal of the low-molecular organic material from the blend gives a functional porous material consisting of the high-molecular organic material. The replacement of the low-molecular organic material in the blend with a solid or liquid, or a mixture thereof, gives a functional composite material containing the solid or liquid, or their mixture in the network skeleton structure.

Abstract: Disclosed is a damping material, which contains from 3 to 30% by weight of a thermoplastic elastomer containing at least two polymer blocks along with a bitumen and which has a dynamic loss tangent (tan .delta.) of being 0.5 or more in 10% deformation under the condition of 25.degree. C. and 1 Hz.

Abstract: The present invention is to provide a method for laser welding different kinds of metals by which at least two types of metal members having mutually different laser reflection factor, are put one upon another and welded when the metal members are irradiated with lasers emitted in the superposed direction, comprising a process to put the first metal member on the second metal member, wherein the first metal member has a first laser reflection factor and the second metal member has a second laser reflection factor which is lower than that of the aforementioned first laser reflection factor, and the first and the second metal member are put one upon another through a metal layer and when irradiated with lasers, the aforementioned metal layer is more difficult to melt than the aforementioned second metal member. The method of the present invention further comprises a process in which lasers are irradiated from the aforementioned first metal member side.

Abstract: An anti-seismic bearing which comprises a plurality of rigid plates and viscoelastic flexible plates laminated alternately, with at least one of the flexible plates being made of a vulcanizate of a high-loss rubber compound composed of 100 parts by weight of rubber and 3 to 40 parts by weight of phenolic resin having a softening point or melting point of 150.degree. C. or below, the vulcanizate having the properties specified below.(i) The hysteresis ratio at 100% tensile deformation at 25.degree. C. is 0.2 to 0.7.(ii) the ratio E.sub.(-10) /E.sub.(30) is 1.0 to 2.5, where E.sub.(-10) is a storage modulus at -10.degree. C. and E.sub.(30) is a storage modulus at 30.degree. C., both dynamically measured at 5 Hz and 0.01% strain.

Abstract: An anti-seismic bearing made up of a plurality of rigid plates and viscoelastic flexible plates laminated alternately, said flexible plates being made of a material characterized by that the hysteresis ratio at 100% deformation at 25.degree. C. is 0.15 to 0.60, the loss tangent (tan .delta.) at 0.01% deformation, 5 Hz, at 25.degree. C. is 0.010 to 0.194, and the ratio E(-10)/E(30) is 1.0 to 3.0, where E(-10) is a storage modulus at 0.01% deformation, 5 Hz, at -10.degree. C. and E(30) is a storage modulus at 0.01% deformation, 5 Hz, at 30.degree. C. An assembly composed of low-damping anti-seismic bearings and high-damping anti-seismic bearings arranged in parallel such that the anti-seismic bearings support the vertical load and undergo elastic deformation in the horizontal direction.

Abstract: An anti-seismic device which comprises anti-seismic rubber bearings and dampers arranged in parallel, the anti-seismic rubber bearing being formed by laminating a plurality of rigid hard plates and soft boards having a viscoelastic property one over another, the damper being composed mainly of a viscoelastic material having the physical properties (i) and (ii) defined below.(i) the hysteresis ratio (h.sub.50) is greater than 0.3 at 50% tensile deformation at 25.degree. C.(ii) the storage modulus (E) measured dynamically at a frequency of 5 Hz, a strain of 0.01%, and a temperature of 25.degree. C. is in the range of 1.ltoreq.E.ltoreq.2.times.10.sup.4 (kg/cm.sup.2).

Abstract: An anti-seismic bearing made up of a plurality of rigid plates and viscoelastic flexible plates laminated alternately, said flexible plates being made of a material characterized by that the hysteresis ratio at 100% deformation at 25.degree. C. is 0.15 to 0.60, the loss tangent (tan .delta.) at 0.01% deformation, 5 Hz, at 25.degree. C. is 0.010 to 0.194, and the ratio E(-10)/E(30) is 1.0 to 3.0, where E(-10) is a storage modulus at 0.01% deformation 5 Hz, at -10.degree. C. and E(30) is a storage modulus at 0.01% deformation, 5 Hz, at 30.degree. C.An assembly composed of low-damping anti-seismic bearings and high-damping anti-seismic bearings arranged in parallel such that the anti-seismic bearings support the vertical load and undergo elastic deformation in the horizontal direction.

Abstract: There is provided an anti-seismic rubber bearing made up of a laminate structure formed by bonding a plurality of rigid plates having stiffness properties and a plurality of flexible plates having viscoelastic properties each other alternately, and flanges each attached to the upper and lower surfaces of the laminate structure, characterized by that the local strain is evenly distributed throughout the structure by lowering the local strain which occurs near the flanges.

Abstract: An outer heat-insulating structure on a building roof comprising heat-insulating boards arranged longitudinally and laterally on the upper surface of a building body, and holds panels arranged longitudinally and laterally over the heat-insulating boards while a spacing is provided therebetween, said adjacent hold panels being joined together by means of support legs and fixing caps at corners of the hold panels, wherein the peripheral portion of the rooftop outer heat-insulating structure is provided with openings.