Abstract: An ultrasonic probe including a piezoelectric substrate divided into a plurality of substrate sections aligned in one direction, a common electrode connected to one side of all the separated substrate sections, and plural individual electrodes being applied to an opposite side of the separated substrate sections, whereby unnecessary vibration modes are suppressed and, additionally, crosstalk characteristics are improved.
Abstract: A semiconductor memory device includes a plurality of semiconductor pillar projections separated by grooves formed in longitudinal and transverse directions in a substrate and arranged in a matrix manner, a MOS capacitor and a MOSFET formed on side surfaces at lower and upper portions, respectively, of each pillar projection, a diffusion layer of a source or drain of each MOSFET formed in an upper end face of the pillar projection, and a bit line connected to the diffusion layer. The bit line is in contact with the upper end face of the pillar projection in a self-alignment manner.
Abstract: An improved process for the preparation of monodispersed spherical colloidal particles from rare earth salts is disclosed. These colloidal particles are obtained in this process by homogeneous precipitation techniques involving the forced hydrolysis of rare earth salts in aqueous media. More specifically, this process initially involves the formation of hydrolyzed cations which are precursors or intermediate to precipitation of the desired colloidal particle. The objective in the formation of this precursor species is to reach critical supersaturation concentration of this particle forming species so that only one burst of nuclei occurs. Colloidal particle formation is then effected by diffusion of solutes onto the existing nuclei. The improvements of this process reside, in part, in the ability to control the kinetics of formation of this intermediate species. Such control permits the formation of colloidal dispersions having very narrow particle size distribution.
Abstract: Quinolonecarboxylic acid derivatives of the following formula: ##STR1## wherein R indicates a hydrogen atom or lower alkyl group, R.sup.1 indicates a lower alkyl group, R.sup.2 indicates a hydrogen atom, amino group or nitro group, X indicates a halogen atom, and Z indicates a halogen atom, piperazino group, N-methylpiperazino group, 3-methylpiperazino group, 3-hydroxypyrrolidino group, or pyrrolidino group of the following formula, ##STR2## (here, n is 0 or 1, R.sup.3 indicates a hydrogen atom or lower alkyl group, R.sup.4 indicates a hydrogen atom, lower alkyl group and R.sup.5 indicates a hydrogen atom, lower alkyl group, acyl group or alkoxycarbonyl group), the hydrates and pharmaceutically acceptable salts thereof are useful as antibacterial agents.
Abstract: A rotating member such as a sprocket to be coupled with a shaft is formed with a fitting bore which extends on the center axis and opens at at least one of its axial end portions. The rotating member is arranged in and rotatably held by a case such that its fitting bore opens toward the outside of the case. The shaft is inserted into and coupled with the fitting bore held in the case such that it can rotate integrally with the rotating member. This rotating member is formed with an air communication portion for providing communication between the inside and outside of the fitting bore and equipped with a valve for opening or closing the air communication portion. The valve may be opened in response to the rise or drop in the internal pressure of a fitting bore, by the pressure of the shaft or by a centrifugal force. With the valve being closed, lubrication oil in the case is prevented from leaking.
Abstract: Reactive dyeings on textile materials containing cellulose fibers are aftertreated with aqueous solutions of benzylated resins which are obtainable(a) by condensation of methylamine and epichlorohydrin or(b) by heating triethanolamine and/or triisopropanolamine in the presence of acidic catalystsand have been reacted with from 0.25 to 1 mole of benzyl chloride per mole of amine in the condensate.The dyed textile materials aftertreated in this manner possess good wet fastness.
Abstract: Copolycondensate molding materials are obtainable by polycondensation offrom 2 to 98 mol % of 2,2-di-(4'-hydroxyphenyl)-propane (A),from 2 to 98 mol % of 4,4'-dihydroxydiphenyl sulfone (B) andfrom 0 to 96 mol % of (C) ##STR1## where R.sup.1 and R.sup.2 are each H, C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxy, X is a chemical bond, --S--, --O--, --CO--, CR.sup.3 R.sup.4 (where R.sup.3 and R.sup.4 are different when n and p are each 0), or SO.sub.2 -- only when n or p is 0), R.sup.3 and R.sup.4 are each H, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, aryl or halogen-substituted alkyl of 1 to 4 carbon atoms, m is 0 or 1, and n and p are each 0, 1, 2, 3, or 4,with from 1 to 100 mol % of (D) ##STR2## where R.sup.5 and R.sup.6 have the same meaning as R.sup.1 and R.sup.2, and v and w are each 0, 1, 2, 3 or 4, and from 0 to 99 mol % of (E) ##STR3## where R.sup.7 -R.sup.10 are each Cl or F or have the same meanings as R.sup.1 and R.sup.2, q is 0 or 1, r, s, t and n are each 0, 1, 2, 3 or 4, Z.sub.
Abstract: A multi spark ignition system using an ignition capacitor and an ignition transformer uses a device for providing charging energy to the ignition capacitor. A field effect discharge switching means is used for discharging the energy that is stored in the ignition capacitor through the primary winding of an ignition transformer. An oscillator is used for causing the discharging switching circuit to operate intermittently with a proper cycle. An additional controlling circuit controls the consumption of additional magnetic energy which is stored in the ignition transformer when it is in its non-operative state. Two returning means are used to consume the magnetic energy or for returning the energy and the ignition transformer under the non-operative and operative states of the discharge switching circuit.
Abstract: A method of manufacturing an air-tight ceramic container is disclosed. This method includes the steps of coating an active metal consisting of Ti and/or Zr on an opening end face of a ceramic tubular member in an amount of 0.1 to 10 mg/cm.sup.2, thereby forming an active metal layer, placing a brazing filler metal on the active metal layer, placing a metal cover member for shielding an opening portion of the ceramic tubular member so that a peripheral portion end face of the metal cover member is in contact with the brazing filler metal, and melting the brazing filler metal by heating, thereby brazing the metal cover member to the opening end face of the ceramic tubular member.
Abstract: An apparatus for truing the cylindrical outer peripheral grinding surface of a grinding wheel includes a truing head which is movable toward or away from the grinding wheel in a first direction which is parallel to the grinding surface and in a second direction which is perpendicular to the first direction. A truing wheel is rotatably supported on the truing head, has a truing surface and is movable with the truing head for truing the grinding surface. A contacting detection member is secured to the truing head, projects therefrom toward the grinding surface and has an end surface which can be brought into contact with the grinding surface. A device is provided for detecting the contact of the end surface of the detection member with the grinding surface and producing an output signal upon detecting their contact. Three feed control devices are provided to move the truing head in various directions.
Abstract: In a method for culturing and cultivating fungi according to the present invention, the woods with the small diameter are used as the host woods. Into these woods with the small diameter, the fungi are inoculated through a cellulose sheet. The inoculated fungi are cultured and cultivated in a plastic bag having a porous site.According to the culture and cultivation method of the present invention, the mushroom of high quality can be harvested in a very short period.
Abstract: Calcium-urea nitrate [Ca(NO.sub.3).sub.2.4CO(NH.sub.2).sub.2 ] is produced by means of a process, according to which:a liquid composition is prepared, at a temperature not higher than 170.degree. C., which contains urea and calcium nitrate, in a molar ratio to each other equal to, or approximately equal to, 4/1, and having a water content comprised within the range of from 0 to 15% by weight;said liquid composition is sprayed, through a spray nozzle, on previously formed solid particles of calcium-urea nitrate, kept moving at a temperature comprised within the range of from 40.degree. to approximately 100.degree. C., and under a stream of an inert gas;calcium-urea nitrate is recovered from said solid products from the spray.The so obtained calcium-urea nitrate is in the form of a granular and free-flowing solid, free from the tendency to form dusts, and is useful in agriculture as a nitrogenous fertilizer.
Abstract: An apparatus for detecting position/variance of input light is disclosed which includes a photoelectric conversion device receiving input light constituted of a first resistive layer formed of a first photoelectric conversion material and a second resistive layer formed of a second photoelectric conversion material connected with the first resistive layer through a depletion layer or directly, wherein the first resistive layer is provided with uniform resistivity throughout its surface so that a linear output proportional to the average of the distances between one end of the photoelectric conversion device and positions of the input light is detected and the second resistive layer is provided with resistivity dependent upon the distance from its one end so that a quandratic ouput proportional to the average of the squares of the distances between one end of the photoelectric conversion device and positions of the input light is detected.
Abstract: A digital sun sensor having an ND filter, a prism, an opaque layer formed on the prism and having a slit, a band-pass filter, and a linear array sensor. A sunbeam passes through ND filter, and is diffracted as it passes through the slit, and is refracted by prism. The diffracted sunbeam, which has a specified wavelength, passes through the band-pass filter and reaches the linear array sensor. The sensor is driven by a first clock signal, thereby generating electrical signals. An automatic gain control circuit maintains these signals at a constant peak value. The output signal of automatic gain control circuit is compared with a reference level. When this output is at a level lower than the reference level, the first clock signal is supplied to an N-bit counter. When the output is at a level higher than the reference level, a second clock signal having a frequency half that of the first clock signal is supplied to the N-bit counter. N-bit counter counts the pulses of either clock signal.
Abstract: Disclosed herein are magnetic iron oxide particles comprising spindle-like magnetite or maghemite particles having an aspect ratio(major:minor) of less than 4:1 and containing 0.1 to 20 atomic % of Si to Fe, and a process for producing the same.
Abstract: Porous membranes are produced by dissolving a film-forming polymer in a good solvent for the polymer, forming a film of the resulting polymer solution, and forcibly contacting saturated steam or mist-containing steam with at least one surface of said film. Such porous membranes have pores having a narrow pore diameter distribution and extending in a direction substantially perpendicular to the membrane surface at a high surface pore density on at least one surface thereof.
Abstract: A flame-retardant composition is prepared by mixing 100 parts by weight of a rubber or plastics free from any halogen with about 50 to about 200 parts by weight of magnesium hydroxide having an average particle diameter of about 0.3 to about 2 .mu.m and about 5 to about 50 parts by weight of carbon black powder having an oil absorption of about 0.5 to about 2.0 ml/g, and then cross-linking the mixture with an organic peroxide, sulfur, or a sulfur compound as a vulcanizing agent. By forming an electrical insulation and/or a sheath of the flame-retardant composition, there is provided a flame-retardant cable of the type including a cable core composed of an electric conductor coated with the electrical insulation or a plurality of such cores twisted together and covered, together with a filler, with the sheath.
Abstract: A high-strength low-ductility material is formed by a method which comprises treating a bulk or powder of the material thereby converting coarse grains thereof into hyperfine grains capable of manifesting superplasticity when the strain rate is higher than 5.times.10.sup.-3 s.sup.-1, enclosing the treated material with a metallic insulating member, heating the material to a temperature for manifestation of superplasticity, and forging the material by the use of a die in a state heated to a temperature beyond which the die yields to heat.
December 5, 1986
Date of Patent:
September 19, 1989
Agency of Industrial Science & Technology, Ministry of International Trade & Industry