Abstract: On a substrate made of a single crystal of La.sub.3 Ga.sub.5.5 Nb.sub.0.5 O.sub.14, an excitation electrode 2 for generating a surface acoustic wave is provided to produce a surface acoustic wave device S. The cutting angles of the substrate and the direction of propagation of the surface acoustic wave are defined in Eulerian angle indication (.phi., .theta., .psi.) by .phi.=50.degree.+60.degree..times.m1, .theta.=125.degree.+180.degree..times.m2 and .psi.=40.degree.+180.degree..times.m3 (where m1, m2 and m3 are integers). Eulerian angles may be .phi.=10.degree.+60.degree..times.n1, .theta.=125.degree.+180.degree..times.n2, and .psi.=70.degree.+180.degree..times.n3 (where n1, n2 and n3 are integers) or .phi.=a1+60.degree..times.b1, .theta.=a2+180.degree..times.b2 and .psi.=a3+180.degree..times.b3 (where 0.degree..ltoreq.a1.ltoreq.60.degree., 125.degree..ltoreq.a2.ltoreq.165.de gree., 110.degree..ltoreq.a3.ltoreq.165.degree., and b1, b2 and b3 are integers).

Abstract: The inspection apparatus for inspecting performance of a structure such as stator windings of an electric rotating machine of the invention comprises a probe including a measuring element, an arm unit and a cylinder face circumferential moving apparatus. The arm unit has an arm link section supporting the probe (mainly comprising a leading end link assembly and an arm posture keeping mechanism), an arm housing section (mainly comprising a guide rail) regarding driving of this arm link section, and an arm driving mechanism. The arm driving mechanism causes the leading end link assembly to project from the guide rail at an angle toward a measuring position side of the stator windings relative to the axial direction of the rotor unit, while causing the arm link section to travel along the guide rail. The arm posture keeping mechanism is provided with a link wire and a spring, and maintains a straight arm posture of the leading end link assembly after projection from the guide rail.

Abstract: A remote control apparatus for maintaining a tokamak type nuclear fusion reactor comprises a rail having a plurality of arcuated links to be extended in a circumferential direction and a plurality of joints for pivotally connecting the adjacent arcuated links, a vehicle running on the rail extended so as to form a continuous arc with its center substantially coinciding with the center of the torus space, and at least one handling device mounted on the vehicle, for handling the in-vessel components. The remote control apparatus is further provided with a rail housing device for receiving the arcuated links in a folded state when they are not in use, a rail mounting device for sending out said arcuated links in succession into the torus space, extending them so that they form a continuous arc and supporting the arcuated link on the proximal end of the rail, and a rail supporting device for supporting the central portion of the rail extended in the torus space.

Abstract: A remote control apparatus for maintaining a tokamak type nuclear fusion reactor comprises a rail having a plurality of arcuated links to be extended in a circumferential direction and a plurality of joints for pivotally connecting the adjacent arcuated links, a vehicle running on the rail extended so as to form a continuous arc with its center substantially coinciding with the center of the torus space, and at least one handling device mounted on the vehicle, for handling the in-vessel components. The remote control apparatus is further provided with a rail housing device for receiving the arcuated links in a folded state when they are not in use, a rail mounting device for sending out said arcuated links in succession into the torus space, extending them so that they form a continuous arc and supporting the arcuated link on the proximal end of the rail, and a rail supporting device for supporting the central portion of the rail extended in the torus space.

Abstract: A control device for a servo motor comprises feedforward means for correcting a speed reference obtained by a position control device by a correction amount obtained on the basis of an objective position or an objective speed of the servo motor so that a response delay of the position control device for obtaining a reference speed necessary to control the rotation angle position of the servo motor to an objective rotation angle position is compensated for while restricting vibration.