Abstract: An impeller includes a vane component integrally molded with a plurality of vanes having predetermined tilt angles that change continuously from a central portion of rotation, and a bottomed cylindrical component formed with a rotating shaft body, so that the vanes have an ideal shape with tilt angles that match the rotational peripheral velocity. For this purpose, the impeller of an axial fan serves as a rotor arranged to be rotatable with respect to a stator fixed to a main body of the axial fan. The impeller includes a bottomed cylindrical component formed by injection molding from a predetermined resin material such that a shaft body axially supported by a rotary bearing of the main body is formed at a central portion of rotation thereof, and a vane component formed by injection molding from a predetermined resin material such that a plurality of vanes are equidistantly formed thereon.

Abstract: This invention provides a compact, flat axial fan which is not limited by the shape of an incorporated rotor magnet and ensures a sufficiently large air flow and wind pressure, wherein the slide (under) piece of a mold that forms the under-molding portions of the vanes of the impeller of the axial fan is pulled out while being twisted (while performing a helical motion) in the direction of central axis of the base portion of the impeller, so that the mold can be formed simple to realize a multi-cavity mold, and the vanes can be formed into an ideal form by setting vane angles depending on different rotating peripheral velocities of the vanes, so that air can be supplied form the under-molding portions of the vanes to the vanes on the outer circumferential side during rotation of the impeller and a method of manufacturing an impeller for the axial fan.

Abstract: An arterial pressure measuring apparatus which comprises in combination a cuff adapted to be applied to a portion a human body where arterial pressure is measured, a light emitting diode, a phototransistor, a transducer, a pump for the control of the cuff, a control unit for the pump, a transducer for measuring the pressure of the cuff, a current control circuit for the light emitting diode, a DC amplifier circuit, an AC amplifier circuit for the output of the phototransistor and an operation circuit.

Abstract: An exposure rate controlling mechanism for a camera comprising an iron member controlled to move to more than three attracted/departed positions by an electromagnet and a mechanism for controlling the exposure rate corresponding to the position to which the iron member moves. The mechanism for controlling the exposure rate comprises an exposure rate controlling member which is moved to a position corresponding to the position to which the iron member moves and an exposure rate determining member which is controlled to move by an amount corresponding to the amount of displacement of the exposure rate controlling member.