Abstract: An apparatus and method are provided for exercising and/or testing the cervical muscles and nerves. The apparatus includes a seat, a shoulder stabilizing assembly, and an assembly for positioning a pressure transducer in proximity to the patient's head. The positioning assembly includes a ring which supports the transducer. The ring is pivotable about a pair of different axes to allow all cervical muscle groups to be tested. The transducer is movable radially within the ring and can be locked in position adjacent the head of the patient. The stabilizing assembly includes restraining members which are either rigid in construction, or in the form of belts, or a combination of belts and rigid parts. An exercise or testing program may be conducted by restraining the patient's shoulders while he applies pressure to the transducer with his head. In this manner, muscles outside the cervical groups will not be recruited during the exercise program or test.

Abstract: To simultaneously measure the magnitudes and directions of both axial and torsional stresses produced in a shaft made of magnetostrictive material and provided with first and second sensing segment areas formed in mirror symmetrical arrangement along an outer circumferential surface thereof, the magnetostrictive stress measurement apparatus comprises a first coil provided around the first sensing segment area; a first bridge circuit for detecting change in inductance of the first coil; and a second coil provided around the second sensing segment area; a second bridge circuit for detecting change in inductance of the second coil; and a calculator for calculating an addition of a first inductance change detected by the first bridge circuit and a second inductance change detected by the second bridge circuit to detect an axial stress and a subtraction between the first and second inductance changes to detect a torsional stress.

Abstract: A magnetoelastic force transducer comprising two identical, cylindrical bodies defining a hollow magnetic core and held together by means of a force-transmitting stud bolt has its measuring and excitation windings located in the core. The interior of the core is constructed such that a thin cylindrical tubular wall is formed opposite to a respective measuring winding in each one of the bodies, whereby when the core is force-loaded via the stud bolt a compressive stress arises in one of these tubular walls and a tensile stress arises in the other. To eliminate a possible measurement signal at zero applied force a magnetically asymmetric center pole in the form of a punched disk of a soft-magnetic material and having the same diameter as the core and having a foil of a similar material secured on one side is located between the bodies. The hickness of the foil determines the magnitude of the signal adjustment.

Abstract: A torque detecting apparatus for measuring the amount of magnetostriction of a rotary magnetic material which transmits torque by means of a magnetic sensor, and detecting the transmitted torque on the basis of the measured amount of magnetostriction. The apparatus comprises a magnetic sensor for measuring the amount of magnetostriction of the rotary magnetic material, a demagnetization coil which is opposed to the rotary magnetic material so as to restore the rotary magnetic material magnetized by a disturbing magnetic field to the state of zero magnetization, a demagnetization circuit for applying an oscillating current to the demagnetization coil so as to generate in the rotary magnetic material a periodic damping oscillating magnetic field having the maximum value larger than the coercive force of the rotary magnetic material; and a trigger circuit for outputting a drive timing signal for the demagnetization circuit.

Abstract: A detector for an electromagnetic flowmeter provided with a pair of detecting electrodes disposed opposite to each other on the inner surface of a piping, through which fluid, whose flow rate is to be measured, flows, and a magnet forming a magnetic field in the direction perpendicular both to the axis of the piping and to the line connecting the detecting electrodes, in which the magnet has a pair of magnetic poles, which are so formed that the magnetic flux density is greatest in the neighborhood of the position apart from the middle point of the straight line segment connecting the detecting electrodes by 0.3 d in the direction towards each of the detecting electrodes, d being the inner diameter of the piping.