Abstract: A thin and high-density package board used with general-purpose mainframe computers and high-speed processors is provided. On a ceramic substrate on which memory LSIs and a logic LSI with only elements formed without multilayer wiring are mounted, a multilayer wiring layer insuring signal transfer of the LSIs is formed, providing a thin package board.

Abstract: The present invention relates to a method of and a device for detecting torque, and more particularly to a method of and a device for detecting torque which are suitable for use at the time of a high-velocity rotation or for detecting a very small torque. An annular or ring-like elastic member is interposed between, for instance, a drive shaft and a load shaft constituting a torque-transmitting shaft system, and is formed with slits with parts of an outer periphery thereof left unslitted to be divided in the axial direction so that the member is of a configuration easily deformable in the radial direction thereof by means of torque. A non-contact type displacement sensor is provided for measuring the deformation of the elastic member, and a marker is attached on the drive shaft to provide a positional signal for use as a sampling signal. The signal of the displacement sensor is extracted on the basis of the sampling signal to be stored and held.

Abstract: This invention is directed to a boring machine provided with a spindle supported rotatably in a spindle housing, a driving means for rotating the spindle, and a spindle feed mechanism supporting the spindle housing so that the spindle housing can be moved up and down. This boring machine includes a means for detecting the level of axial displacement of the spindle in boring motion with the detecting means not contacting the spindle, and a comparator for comparing the level of the actual axial displacement of the spindle or the thrust force applied thereto and corresponding to this displacement with a predetermined threshold level of axial displacement or a threshold level of thrust force. The spindle feed mechanism is controlled in response to the output from the comparator.