Abstract: A thermal transfer image-receiving sheet for recording thereon colored dye images having a high clarity and color density and an excellent storage durability, comprises an image-receiving resinous layer formed on a substrate sheet and comprising a resinous material which is an actinic ray irradiation curable product of a precursory resinous composition comprising (A) an unsaturated acrylic or methacrylic ester compound having a rosin or modified rosin residue, (B) another acrylic or methacrylic ester compound having a bisphenol A residue, at least one ethylene glycol residue and at least two terminal acrylic or methacrylic ester residue, and optionally (C) still another unsaturated acrylic or methacrylic ester compound having a single terminal acrylic or methacrylic ester residue.

Abstract: A novel 2,4-dihydroxyadipic acid derivative of the formula: ##STR1## wherein R.sup.1 and R.sup.4 are the same or different and each a hydrogen atom, an alkyl group, an aralkyl group, an aryl group or a silyl group, and R.sup.2 and R.sup.3 are the same or different and each a hydrogen atom or a protective group of a hydroxy group or together form a ring, which is useful as a common intermediate in the synthesis of HMG-CoA reductase inhibitor.

Abstract: In an internally meshing planetary gear structure with trochoidal tooth profile, the input shaft and the eccentric body are coupled so that radial displacement is possible and that the displacement between the eccentric body shaft and the input shaft is absorbed. In addition to this, positioning members or thrust bearings are used to suppress the axial movement or the inclination of the eccentric body or the external-toothed gears.

Abstract: 3-Pyrrolidinol or its salt is economically produced by cyclizing an aminobutanol derivative of the formula: ##STR1## wherein R is an alkyl or a substituted or unsubstituted phenyl group, or its salt.

Abstract: A process for forming a silica film on a substrate which comprises bringing the substrate into contact with an aqueous solution of hydrosilicofluoric acid supersaturated with silica, wherein the supersaturated solution is filled in an inner vessel which is opened downwardly so as to allow the introduction of the substrate thereinto and is arranged inside an outer vessel at a distance from the side walls and the bottom of the outer vessel, and a liquid material having substantially no reactivity and miscibility with the supersaturated solution and having a higher specific gravity than the supersaturated solution is charged in the outer vessel so as to retain the supersaturated solution in the inner vessel without flowing down toward the bottom of the outer vessel, and whereby the supersaturated solution is prevented from being exposed to the atmosphere and accordingly the process can be practiced at high deposition rate in high efficiency and yield without evaporating effective Si components which result in fo

Abstract: A wide dynamic range current source circuit comprising a first current mirror circuit including a first transistor functioning as a first output current path, and a second transistor for receiving a first control voltage and functioning as an input current path for controlling a current flowing in the output current path. The wide dynamic range current source circuit further comprises a second current mirror circuit including a third transistor functioning as a second output current path bypassing the input current path of the first current mirror circuit, and a fourth transistor for receiving a second control voltage different from the first control voltage and controlling a current of the second output current path. The second current mirror circuit controls current flow in the first mirror circuit such that this current flow is larger than a current flowing during a non-linear operation of the first current mirror circuit.

Abstract: A light emitting element drive circuit which has high operation speed, low current consumption and provides an optical output signal with minimum distortion. An inverted input signal is applied to a second transistor which drives a differentiating circuit. The differentiating circuit drives a third transistor which provides a current path for discharging the light emitting element. The light emitting element discharges when the input signal falls. The input of the differentiating circuit and the input of the light emitting element drive circuit are isolated to prevent "back gating" distortion of the optical signal.

Abstract: A gain stabilizing amplifier comprises an amplifying transistor for amplifying an input signal; a node for determining a current flowing into the amplifying transistor; a variable current supply connected to the node, a current output from the variable current supply being set to offset variations in a bias current of the amplifying transistor.

Abstract: A 3,4-epoxybutyrate of the formula: ##STR1## wherein R.sup.1 is an alkyl or aralkyl group is efficiently prepared by a process comprising steps of:(a) reacting 3,4-dihydroxybutyronitrile of the formula: ##STR2## with a sulfonyl chloride of the formula: R.sup.2 --SO.sub.2 --Cl wherein R.sup.2 is an alkyl group or a phenyl group which may be substituted in the presence of a base to obtain a compound of the formula: ##STR3## (b) reacting the compound prepared in the step (a) with an alcohol of the formula: R.sup.1 --OH in the presence of an acid to obtain a compound of the formula: ##STR4## and (c) reacting the compound prepared in the step (b) with a base to obtain the 3,4-epoxybutyrate.

Abstract: An optical disc driving apparatus is provided for the access control system with respect to the optical disc, comprising emphasizing circuits which compensate for a decrease in the frequency response of a reproduced signal from an optical head and further comprising peak detection circuits for detecting envelopes of the output signals. The emphasizing circuits and peak detection circuits are not used for processing of the tracking servo sensor signal, therefore the compensation amount need not be accurately controlled. The characteristic of the reproduced signal of the optical disc is effectively utilized, thereby enabling the compensation amount to be used over a wider range from about a proper value to an excessive value. In addition, being able to use the compensation amount over a wider range results in a reduction in the number of separate stages of compensation.

Abstract: A constant current regulated power circuit comprises first and second voltage sources; a bias circuit connected to the first and second voltage sources for sending out a predetermined output voltage, the bias circuit having an output terminal; first and second resistors; and a transistor having a base connected to the output terminal of the bias circuit, an emitter connected to the first voltage source through the first resistor and to the second voltage source through the second resistor, respectively, and a collector operating as an output terminal.

Abstract: Fixed terminals and movable terminals are arranged on both sides of a turn table, which is provided along its circumferential direction with a plurality of holding holes for receiving chip electronic components so that both end portions thereof project from the holding holes. The movable terminals are provided by parts of a printed circuit board or elastically flexible plate members such as plate springs, and they are elastically brought into contact with electrodes which are formed on first end surfaces of the chip electronic components. Due to such elastic contact of the movable terminals, electrodes formed on the other end surfaces of the chip electronic components are pressed into contact with the fixed terminals.

Abstract: A device for driving and controlling an optical head by forming a spot of a light beam on an optical disk having a plurality of tracks and detecting light from the spot reflected on the optical disk by a pair of optical detectors disposed in the head.

Abstract: A power conversion system includes an inverter for transforming d.c. power into high-frequency a.c. power, a high-frequency transformer for changing the voltage and isolating the input and output power lines, and a rectifier which rectifies the transformer output in synchronism with the inverter output and in timing relationship so that the averaged voltage waveform of the rectified output is sinusoidal.

Abstract: A forceps device for use in an endoscope is described. The device comprises a pair of forceps cups capable of closing and opening, a link member, an operating wire, and a flexible tube. Pivot pins for connecting the forceps cups to the link, the link to the operating wire and the forceps cups to the connecting portion of the flexible tube are fused or welded to corresponding portion of components with the use of laser welding process.

Abstract: A docking apparatus comprises a drive truck adapted to run along a side wall of a dock approximately horizontally, a surface treating truck connected to the drive truck at all times and having a hull surface treating device, and a docking truck connectable to and separable from the drive truck and having a retractable hull suction disk. The drive truck only is provided with drive units for running.

Abstract: An exhaust gas recirculation system for an internal combustion engine in which an exhaust gas control valve and a pressure regulating valve is constructed as one body to facilitate the mounting of the system on the engine and to improve the response characteristic of the system. Also, the chamber of the pressure regulating valve opposite to the chamber for receiving the exhaust gas is subjected to a pressure which is controlled in corresponding to the state of engine operation such as load, engine speed or the like, so that the rate of the exhaust gas recirculation is controlled in accordance with the state of engine operation.

Abstract: A process for manufacturing concrete articles of improved initial strength and long-term strength from a hydraulic cement composition capable of forming predominantly tobermorite group crystalline calcium silicate hydrate is provided. The hydraulic cement composition, having incorporated therein specified amounts of alumina cement and calcium hydroxide and/or oxide, is initially set in a mold and after the concrete so formed is allowed to stand at a temperature of not higher than approximately 40.degree. C for a period of 2 hours to 5 days, the concrete is finally cured at an elevated temperature and pressure.

Abstract: Light-weight foamed concrete articles are advantageously manufactured in a continuous manner from a rapid setting hydraulic cement composition. The cement composition in the form of a dry powder and an aqueous foamed liquid containing a foaming agent and a setting retarder are separately and continuously introduced into a continuously stirred vessel where they are mixed into an aqueous foamed cement slurry within a short period of time. The foamed cement slurry is cast into the desired shape and, if desired, cured.