Abstract: There is provided an optical shaping apparatus for readily implementing three-dimensional shaping with sufficiently high accuracy, including a material tank that has a bottom surface made of a light-transmitting material and accommodates a photo-curing liquid material, a light source unit that incorporates a driving mirror and scans the bottom surface with a laser beam, and a lifting mechanism that lifts a shaped object shaped by the laser beam from the material tank. The light source unit includes, as an optical engine, a housing, a laser diode that is arranged on one side in the housing and emits a laser beam, and the driving mirror that reflects reflected light from the laser diode by changing an angle in a vertical direction and a horizontal direction.

Abstract: There is provided an optical shaping apparatus for readily implementing three-dimensional shaping with sufficiently high accuracy, including a material tank that has a bottom surface made of a light-transmitting material and accommodates a photo-curing liquid material, a light source unit that incorporates a driving mirror and scans the bottom surface with a laser beam, and a lifting mechanism that lifts a shaped object shaped by the laser beam from the material tank. The light source unit includes, as an optical engine, a housing, a laser diode that is arranged on one side in the housing and emits a laser beam, and the driving mirror that reflects reflected light from the laser diode by changing an angle in a vertical direction and a horizontal direction.

Abstract: A portion of a highly conductive metal member is infiltrated in voids of a porous high melting point metal member, and both the metal members are integrally joined to each other. An arc electrode portion 13 is formed of a high melting point area 11 in which the highly conductive metal is infiltrated in voids of the high melting point metal member. A coil electrode portion 14 is formed by hollowing out the interior of a highly conductive metal area 12 composed only of highly conductive metal and by forming slits 15 to 17 thereon. A rod 18 is hard-brazed on the rear surface of the coil electrode portion 14. With this electrode, it is possible to reduce the number of parts, and to omit the brazing portion between the arc electrode portion 13 and the coil electrode portion 14 for lowering the electric resistance and thereby the calorific value.

Abstract: A low cost and highly reliable vacuum circuit interrupter and a method of manufacturing the same improve production efficiency and vacuum tight sealing property of the vacuum circuit interrupter. In the vacuum circuit interrupter, within a sealed vacuum vessel 100 a pair of separable conductors in center axial direction of the sealed vacuum vessel composed of a stationary conductor 3 and a movable conductor 5 are disposed.

Abstract: A transporting apparatus for transporting cylindrical steel articles such as steel pipes by using inclined skid rails is arranged to have a magnetic braking device including electromagnetic coils for controlling the rolling speeds of the articles to be transported, wherein the electromagnetic coils are so disposed as to minimize a magnetic path for the magnetic fluxes developed by the electromagnetic coils and are also arranged in the shell type manner to prevent the electromagnetic coils from being externally damaged.

Abstract: In an apparatus for transporting cylindrical steel articles by rolling down on inclined skid rails, a plurality of electromagnets are provided along extension of the skid rails so as to reduce the speed of rolling down of the articles repeatedly during transportation on the skid rails by applying forward and reverse excitations to each of the electromagnets at a predetermined timing thereby to transport the articles in a pitch transfer mode.