Abstract: An electric-powered shutter apparatus to be mounted to a building. A winding drum (4) of an electric-powered shutter device (1) is provided with a driving mechanism including an electric motor (7) and a single-directional rotary clutch device (8). A balance tension device (9) is provided at the other end of the apparatus. The clutch device (8) is configured to slip when the load of the rotation in the direction of the curtain being fed exceeds a certain load. Further, the load at which the clutch device (8) slips is set so as to be greater than the force for forcibly rotating the electric motor when disconnected from electric power. The balancing tension device (9) is balanced against the sum of the weight of the shutter curtain (2) and the load for forcibly rotating the electric motor (7). Thus, the need for a braking device for the electric-powered shutter apparatus to be mounted to a building is eliminated.

Abstract: An ultrasonic diagnostic device capable of the accurate real-time measurement and display of the amount of deviation in the velocity distribution of moving objects within a living organism.

Abstract: An ultrasonic diagnostic apparatus for accurately displaying the velocity distribution of moving members within a living organism. The apparatus constitutes an improvement on the ultrasonic diagnostic apparatus of the type wherein an ultrasonic pulse beam is repeatedly transmitted into the living organism at a fixed pulse rate and the reflected echoes are picked up, amplified and displayed, wherein the improvement comprises a complex signal converter for converting a received high frequency signal into complex signals by mixing the received high frequency signal with a pair of complex reference signals which have frequencies that are integer multiples of the pulse rate and which are complexly related to one another, an autocorrelator for determining the autocorrelation of the complex signals, the autocorrelator having a delay time equal to an integer multiple of the pulse period, and a velocity determination circuit for determining the velocity through said autocorrelation.

Abstract: An ultrasonic diagnostic apparatus including a compound scanner, a transmitting and receiving control circuit, a digital scanning convertor, a display section, a mode change-over switch, a position signal generator and a heart beat synchronizing signal generator, whereby operation of the change-over switch makes it possible to display dynamic picture images or still picture images at selected time phases by real-time sector scanning and compound sector scanning.

Abstract: An ultrasonic diagnostic probe scanner for an ultrasonic diagnostic apparatus. The scanner includes a scanner system having six joints, each of which can be rotated within a predetermined plane. The scanner system is supported on a scanner base at one end and has an ultrasonic probe attached thereto at the other end. Each of the six joints is provided with an angle detector to detect the angle of the joint. As a result, the ultrasonic probe can be arbitrarily positioned with an arbitrary beam direction. The positional information obtained from the angle detectors is used to provide the ultrasonic diagnostic apparatus with additional functions.