Abstract: In a swimming pool in which water is circulated by a pump, a schoolboy child is liable to be absorbed into a discharge port, which is dangerous. A sensor which has a load cell is provided at the back of a water-permeable cover in the discharge port. If a human body of the child is absorbed into the discharge port and contacted with the cover, the load cell is pressed by the water-permeable cover to transmit a signal to a control circuit in which it is determined whether or not pressure variation applied to the sensor is normal or abnormal. If abnormality is determined therein, an alarm is sounded to inform a watcher of the accident and the pump is stopped to release the child from the discharge port.

Abstract: It is an object of the invention to improve reliability of wiring layers in a semiconductor device comprising an intermetal insulator layer composed of a polysilazane SOG layer. A method for fabricating semiconductor device comprises the steps of forming a wiring layer provided with a oxidization-resisting metallic layer covering its outer surface on an underlying insulator layer, which is formed on a semiconductor substrate, forming a side wall insulator layer with penetration-resisting property against oxidizing gas around a wiring layer and the oxidization-resisting metallic layer, applying spin-on glass (SOG)-producing materiel composed of silicon compound materiel, which comprises silazane bonding in its back bone, thereon, and sintering the SOG-producing material in oxidization gas atmosphere.

Abstract: In an electric valve actuator, an apparatus is provided for preventing overload of a motor by continuously detecting the torque of the motor as a prime mover. The apparatus includes a valve stem which is moved up and down by the motor through a reduction transmission mechanism. The reduction mechanism includes a screw feed system such as a worm and a worm wheel. A pressure reception plate is disposed to receive the thrust from this feed system, and a strain gauge is fitted to the pressure reception plate. The torque of the motor can be detected continuously according to the change in resistance of the strain gauge caused by deformation of the pressure reception plate.

Abstract: In a valve used in a nuclear power plant, a valve body from which a valve stem projects upwards is connected with a valve drive device for driving the valve stem by a hollow cylinder which is provided concentrically with the valve stem. On the hollow cylinder, strain gauges are attached to detect both torque and thrust, thereby detecting load exactly.

Abstract: A stabilized sodium percarbonate particle includes a sodium percarbonate particle having at least one coating layer thereon, wherein the at least one coating layer includes (a) a silicate; (b) magnesium sulfate; and (c) an alkali metal salt selected from the group consisting of alkali metal carbonates, alkali metal bicarbonates and alkali metal sulfate. The present sodium percarbonate particle is good in solubility and is excellent in its formulation stability with detergent.

Abstract: A pneumatic tire having a plurality of main grooves extending in the circumferential direction of a tread surface, and a plurality of auxiliary grooves each of which is disposed in the shape of the letter "V" and extended in one of the circumferential directions of the tread surface, the apexes of the V-shaped auxiliary grooves being distributed in left and right regions each extending from the equator of the tire as much as 5-25% of the width of a ground contacting portion of the tread surface, in such a manner that the numbers of the apexes in the left and right regions become substantially equal to each other, characterized in that quasi-main grooves each of which connects at least two circumferentially arranged auxiliary grooves together are provided in left and right regions each extending from the equator of the tire as much as 25-50% of the width of a ground contacting portion of the tread surface, in such a manner that the quasi-main grooves are inclined at an angle of 5.degree.-25.degree.

Abstract: A rewritable thermosensitive recording medium having a recording layer, the transparency of which reversibly changes depending on the temperature thereof. Further, the recording layer contains a matrix material and an organic low-molecular-weight material dispersed in the matrix material as main components thereof. Moreover, an alicyclic dicarboxylic acid compound is added to the organic low-molecular-weight material dispersed in the matrix material. Furthermore, by adding the alicyclic dicarboxylic acid compound to the organic low-molecular-weight material, the eutectic point of the organic low-molecular-weight material and the alicyclic dicarboxylic acid compound becomes higher than the melting point of the organic low-molecular-weight material.

Abstract: A valve stem driving apparatus comprises a valve stem which has first and second ends, the second end being connected to a valve body. The valve stem is engaged with a stem nut. A distance measuring device is provided in an upper cover for the valve stem and measures a distance between the upper cover and the first end of the valve stem, so that wear rate of the valve stem and/or the stem nut is determined.

Abstract: Tires each having a tread pattern comprising sub-grooves diagonally disposed in the same direction are fitted on the left- and right-hand sides of an automobile such that imaginary lines extending respectively from the sub-grooves of the left- and right-hand tires of the same axles intersect each other on the front side of the automobile for the dry road running, while the imaginary lines intersect each other on the rear side of the automobile for the wet road running.

Abstract: A pneumatic tire wherein a plurality of main grooves are provided in a tread of the tire in the circumferential direction thereof with a plurality of sub-grooves connecting these main grooves with each other being provided in the width-wise direction of the tire, wherein each of these sub-grooves is bent in a convex shape facing in the same direction relative to the circumferential direction of the tire, and wherein bending points of the sub-grooves are distributed within those areas in the tread of the tire which extend, respectively, from a tire equator line toward opposite sides of the tire in the width-wise direction thereof over a distance equal to 5 to 25% of the tread ground-contacting width in such a manner that the number of the bending points become substantially equal on either side of the equator line.

Abstract: Pneumatic tire characterized in the edge of each block formed on a tire tread surface is chamfered to a curve surface connecting to the tread surface in a curve form.

Abstract: This invention relates to a pneumatic tire equipped on its tire tread surface with a plurality of main grooves extending in a tire circumferential direction and transverse grooves extending from the center portion to shoulder portions while crossing the main grooves. The radius r of an approximate arc approximating to the ground contact front edge line of the tire tread surface has a relation r.ltoreq.2w with the ground contact width w, the direction of the main grooves has an angle within a range of .+-.10.degree. with respect to the normal of the approximate arc and the main grooves are disposed also in the shoulder portions outside 40 % from the center of the tire tread surface besides the center portion.

Abstract: When abnormal torque occurs in a valve, water gate, etc., it changes speed of a load shaft in a reduction gears, which is transmitted from a worm to a rotary encoder via a main shaft connected to an electric motor and gears. An electric signal is fed from the rotary encoder to a microcomputer in which the abnormal torque is identified to stop the elctric motor. The microcomputer also identifies a full-opening point and a complete-closing point of the valve to stop the electric motor.

Abstract: There is disclosed a specific method, which is applied to a charged particle beam pattern drawing system, for drawing a circuit pattern on a workpiece using a charged particle beam. A circuit pattern to be drawn is first divided into unit figures by parallel line segments extending from the vertexes of the figure that has a polygonal planar shape in a first reference direction. Each of the unit figures corresponds to a specific reference figure registered in advance. When the divided unit figures include an elongated too-small figure having at least one side shorter than a predetermined minimum allowable length, the too-small figure is merged with at least one unit figure adjacent to it at least once, and thus an expanded unit figure is defined. The expanded unit figure is divided into new unit figures by parallel line segments extending from its vertexes in a second reference direction perpendicular to the first reference direction so as to correspond to the reference figures.

Abstract: A perfume composition is disclosed, containing methyl l-3,7-dimethyl-7-hydroxyoctylideneanthranilate of the following formula (I): ##STR1## The perfume composition of the invention is less allergenic and safer than those containing the corresponding d- or dl-form. Further, the perfume composition has a less irritating odor and imparts a clean and green note.

Abstract: A method for assay of enzyme activity which comprises treating an amide compound of the formula ##STR1## with peptidase; treating thus-liberated amine of the formula ##STR2## with an oxidase which consume oxygen and forms pigment by oxidative condensation of said amine with a coupler of the formula ##STR3## and quantitatively measuring the detectable changes. Also disclosed is an assay method which comprises treating an amide compound of the formula ##STR4## or a salt thereof, with peptidase to liberate an aniline derivative of the formula ##STR5## oxidizing said aniline derivative; and quantitatively measuring detectable change.

Abstract: A peptide of the formulaR--Lys--Lys--Glu--Asp--Asn--Val--Leu--Val--Glu--Ser--His--Glu--Lys--Ser--Le u--Gly--Glu--Ala--Asp--Lys--Ala--Asp--Val--Asp--Val--Leu--Thr--Lys--Ala--Ly s--Ser--Gln--OHwherein R is H, H--Tyr-- or R.sub.1 --Pro--Arg--, R.sub.1 is H, H--Tyr-- or R.sub.2 --Ala--Gly--Ser--Gln--Arg--, and R.sub.2 is H, H--Cys-- or H--Tyr--, or a salt thereof, is useful for assaying human parathyroid hormone (h-PTH).