Abstract: A method for measuring figure of deflection of a golf club shaft, including the steps of horizontally orienting the golf club shaft along an x-axis and fixing a grip end of the golf club shaft to form a cantilever, deflecting the golf club by applying a predetermined load at points on the golf club shaft located on the side of the shaft near the free end thereof to form a deflection curve of the golf club shaft, and obtaining the location of an intersection point of a tangent of the deflection curve and the x axis. The tangent is obtained at the load applying point or in the vicinity of the load applying point on the free end side of the golf club shaft. The method further includes the step of determining a distance between the intersection point and a specific point on the golf club shaft to obtain a parameter which represents the figure of deflection of the golf club shaft.

Abstract: A golf club shaft having a vibration preventing piece firmly mounted thereon for improving a feeling to be received by a player when he hits a golf ball with his golf club is disclosed. The vibration preventing piece is firmly mounted on a golf club shaft at the position defined by an inequality of 1.8.gtoreq. c/d.gtoreq.0.35 wherein c designates a distance between the tip side of the golf club shaft and a center of the vibration preventing piece and d designates a distance between the butt side of the golf club shaft and the center of the vibration preventing piece.

Abstract: A printing blanket including a base fabric and a surface layer in a laminated structure wherein a surface reforming agent containing a perfluoroalkyl group is applied to the surface layer such that a critical surface tension ranging from 10 to 16 dyn/cm appears on the surface of the surface layer is disclosed. To practically manufacture a printing blanket of the foregoing type, there is also disclosed a method wherein a compressible layer is placed on a base fabric, a surface layer is then placed on the compressible layer thereby to form a laminated structure with the base fabric and the compressible layer, and thereafter, a surface modifier containing a perfluoroalkyl group is applied to the surface layer such that a critical surface tension ranging from 10 to 16 dyne/cm appears on the surface of the surface layer. It is preferable that the surface layer is molded of a compound based on a nitrile butadiene rubber.

Abstract: A stylus pen for use as a computer input device includes a pen holder with an associated tip, a chamber defined in the pen holder and filled with a non-compressible fluid, a pressure sensor having a pressure receiving surface that detects pressure in the chamber, and a means for converting a mechanical force applied to the tip to a change in pressure of the non-compressible fluid enclosed in the chamber. In the use of the pen a mechanical force applied to the tip changes the pressure of the non-compressible fluid; and this pressure change is detected by the pressure sensor to produce a change in the output signal from the sensor usable as a computer input.

Abstract: A pneumatically-operated valve in which a valve actuator is formed of two separate parts: a driving member having a plurality of sealed pistons fixed to a piston rod in series to be operated by air pressure, and a valve operating member which comes into contact with a clean fluid and which does not have any soft substances such as O-rings which are likely to be impaired by ultrasonic cleaning. The valve facilitates the cleaning of the members during the process of manufacture and furthermore can provide a great deal of output for its size without contaminating the clean fluid during use.

Abstract: A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of the passage block open into the end face of the passage block adjacent to the control block through respective fluid passages. The pilot pressure is exerted on the diaphragm by the pilot pressure passages to control the fluid connection between the ports of the passage block. The fluid passages are located in a concentric arrangement.The diaphragm has a center valve portion with an annular valve portion therearound. The two valve portions can be independently controlled by the pilot pressure acting thereon to control the fluid connection between the two adjacent fluid passages.

Abstract: A pneumatically-operated valve in which a valve actuator is formed of two separate parts: a driving member having a plurality of sealed pistons fixed to a piston rod in series to be operated by air pressure, and a valve operating member which comes into contact with a clean fluid and which does not have any soft substances such as O-rings which are likely to be impaired by ultrasonic cleaning. The valve facilitates the cleaning of the members during the process of manufacture and furthermore can provide a great deal of output for its size without contaminating the clean fluid during use.

Abstract: A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of the passage block open into the end face of the passage block adjacent to the control block through respective fluid passages. The pilot pressure is exerted on the diaphragm by the pilot pressure passages to control the fluid connection between the ports of the passage block. The fluid passages are located in a concentric arrangement. The diaphragm has a center valve portion with an annular valve portion therearound. The two valve portions can be independently controlled by the pilot pressure acting thereon to control the fluid connection between the two adjacent fluid passages.

Abstract: An air pilot operated directional control valve for selectively connecting a normally open port to two selection ports, by an axial movement of a plunger with valve seats which are adapted to selectively close the axial open ends of the selection ports. The valve has diaphragms which define therebetween a control chamber in which the selection ports and the normally open port open. The plunger is continuously biased by a spring in one direction. The valve also has a pilot pressure chamber which is defined by one of the diaphragms, so that when the pilot pressure exceeds a predetermined value, the plunger moves in the axial direction against the spring to switch the connection between the normally open port and the selection ports.

Abstract: A fluid directional control valve having a valve housing with valve chamber therein, an elastic seal ring for sealing the valve chamber, valve ports provided in the housing and connected to the valve chamber, a valve arm having valve bodies and swingably supported in and by the seal ring, and an actuator for actuating the valve arm, so that the valve bodies selectively open and close the valve ports in order to control the fluid connection between the valve ports, in accordance with the swing movement of the valve arm.

Abstract: A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of the passage block open into the end face of the passage block adjacent to the control block through respective fluid passages. The pilot pressure is exerted on the diaphragm by the pilot pressure passages to control the fluid connection between the ports of the passage block. The fluid passages are located in a concentric arrangement. The diaphragm has a center valve portion with an annular valve portion therearound. The two valve portions can be independently controlled by the pilot pressure acting thereon to control the fluid connection between the two adjacent fluid passages.

Abstract: An improved vertical elongated chute usable for allowing a person who has to leave a ship to descend on the sea surface in the event of an occurrence of an emergency. The vertically extending main body is made of a base cloth of which both longitudinally extending side edges are jointed to one another to build a tubular zigzag slip down passage. A zigzag slip down passage cloth having a plurality of bent parts in fixedly secured to the base cloth. An inclined slip way is jointed to the lower end of the main body so that the person who has descended through the zigzag slip down passage lands on the platform by way of the inclined slip away. An expansible cloth of which expansibility is determined in the range of 200 to 250% as seen in the longitudinal direction as well as in the peripheral direction of the main body is fixedly secured to each of the bent parts on the zigzag slip down passage cloth.

Abstract: An improved method of producing a compressible layer to be utilized for a blanket for printing operation is disclosed, wherein the improvements are that the method comprises the steps of adding to elastomer compound of oil resistant polymer pulverized material which is dissolvable in effluent, placing the elastomer compound over a base fabric in the form of a layered structure, and subjecting to vulcanization and then immersing it in the effluent at a predetermined temperature for a certain period of time. To improve compressibility one or more another compressible layers are preferably placed over the early prepared compressible layer with adhesive agent interposed therebetween so as to form an integrated structure.