Abstract: There is disclosed a method of preparing a refined organic compound, comprising the steps of adding water to an organic reaction mixture and mixing them, and then subjecting the mixture to filtration processing using a filter, to separate an organic phase from an aqueous phase, and then isolating the intended organic compound from said organic phase. The method enables highly precise removal of a water-easily soluble compound from an organic reaction mixture, and it further enables obtaining the intended synthesized organic compound in high yield with a high quality.

Abstract: Disclosed is a head base shift mechanism in an auto-reverse cassette tape recorder comprising a motor (2); a chassis (1) with a pair of capstans (41), (41′) rotatable in forward and reverse directions; a head base (15) slidably mounted on the chassis and carrying at least a head (16) substantially at a center of the head base; a pair of pinch rollers (17), (17′) for forward play and reverse play arranged in a substantially symmetric design at opposite sides of the head; spring means (23) for biasing the head base toward a stand-by position remote from a tape running plane (T) defined by and between the capstans; a pair of engagement members (272), (272′) engageable with the head base at a point offset from a center line (X) of the chassis; and rotation transmission means (10) for moving one of the engagement members, selected depending upon the direction of rotation of the motor, while in engagement with the head base at the offset point, thereby moving the head base from the stand-by positi

Abstract: An electrical connector (10) comprises a connector housing (11) having a side wall (13) to define a receiving space (14) for receiving a mating connector (30) mounted on a surface (P2) by means of a connection section (42A) of a contact element (40) that extends outwardly from a housing (31) of the mating connector (30); at least one guiding section (17) provided on a front face of the side wall (13) in an area where no connection section of the mating connector is present and accommodating the connection section (42A) of the mating connector (40) when the mating connector (40) is plugged into the electrical connector (10); and at least one guiding face (18) provided on the guiding section (17).

Abstract: An electrical connector comprises a terminal (12) having a contact section (13) for contact with a mating terminal (22) and a housing (11) made of an insulative material and molded integrally with the terminal. The contact section (13) is indented and a side ridge (14) is raised from the contact section.

Abstract: A mechanism for retaining one tape deck (12), of a double cassette tape player (14), into a temporal inoperative position, which comprises a trigger arm (40) rotatable about a first pivot (41) on a chassis (15) of the tape deck; a first spring (42) for biasing the trigger arm to rotate in a predetermined direction; a pause lever (50) slideable on the chassis of the tape deck; a second spring (54) for urging the pause lever to move in a predetermined direction; and actuating structure or a push lever (38) that is made operative in response to rotation of the motor to urge the trigger arm to rotate in an opposite direction against the first spring. The pause lever is allowed to be slid in the predetermined direction by the second spring when the trigger arm is caused by the push lever to rotate in the opposite direction.

Abstract: An autoreverse mechanism for a tape recorder having two fly-wheels and two pinch rollers for winding a tape in forward and reverse directions comprises a head mount plate designed in such a way that when the head mount plate moves toward a reproducing/recording position from a stop position and is locked there, the head mount plate moves while being inclined upper rightward or upper leftward, and is locked, and the two pinch rollers are separately pressed against the respective fly-wheels by using that inclination, thereby winding the tape.

Abstract: A fuel additive pipe 11 comprised of a pipe main body 12 and a plating layer 13 formed on the external or interior wall surface of the pipe main body 12 and composed of an electroless plating layer 131 and an electroplating layer 132. The pipe main body 12 contains a high-density polyethylene as a base material and an additive 21 such as mica. While the pipe main body 12 is subjected to an etching treatment, the additive 21 does not dissolve in the etching solution, so that the additive 21 protrudes from the surface of the pipe main body 12. The thus protruding additive 21 serves as the starting point for forming the electroless plating layer 131 and promotes growth of the layer 131. This electroless plating layer 131 is firmly bonded with the pipe main body 12 by chemical absorption to the additive 21 from which inactive sites are removed by the etching treatment as well as by the physical absorption to the fine roughness formed by the etching treatment on the surface of the pipe main body 12.

Abstract: Disclosed is a method for producing an optical member having excellent optical characteristics. An optical member is composed of a support plate and an optical sheet stuck on said plate via an optical adhesive. The optical adhesive is made sticky after it is coated, including ultraviolet-curing adhesives, epoxy adhesives and their mixtures. To produce the optical member, the optical sheet is formed on the surface of a fixed substrate via a transfer film. The optical adhesive is coated onto the optical sheet, the adhesive is made sticky on the sheet, the fixed substrate is peeled off, the sheet is stuck onto the support plate using the adhesive, and the adhesive is cured.

Abstract: Provided is a method of making a multi-property polyurethane part by RIM having a surface layer and an interior layer. The surface layer and the interior layer have different properties. The pressure in the cavity of the mold is reduced and a surface forming RIM polyurethane material is injected into the evacuated cavity, whereby the surface layer of the molded part is formed by RIM. An interior forming RIM polyurethane material is injected into the evacuated cavity, whereby the interior of the molded part is also formed by RIM.

Abstract: A resin pipe provided with a retainer fitting at an end thereof having an open end portion. The open end portion has a small outer diameter portion adjacent the open end which is provided with a seal fixed onto an outer circumferential surface thereof, and a large outer diameter portion extends axially from the small diameter portion on which is provided a crimping groove formed circumferentially on the outer circumferential surface thereof to protect a seal between the retainer fitting from crimping forces. The retainer fitting has an inner cylinder portion, a small-diameter outer cylinder portion extending axially round the opening end from the inner cylinder portion, an enlarged-diameter portion extending outwardly from the small-diameter outer cylinder portion, and a large-diameter outer cylinder portion extending axially from the enlarged-diameter portion so as to cover the outer circumferential surface of the large diameter portion.

Abstract: In an apparatus for detecting a property of a liquid, light is emitted from a light emitting element towards an interface between a liquid to be measured and a prism in an interface channel. Reflected light from the interface is received by a light receiving device, and a refractive index of the liquid is obtained from the total reflection critical angle. A cleaning member capable of contacting the interface by the flow of the liquid is provided. The cleaning member may be a small body or a floating member, a tape/string member having one end fixed to a channel wall, or a wiper swingable by the flow of the liquid.

Abstract: A process for removal of hydrogen sulfide is here provided by which sulfur and hydrogen can be efficiently recovered from a hydrogen sulfide-containing gas and secondarily produced sulfuric acid can be properly treated, whereby a long-term continuous operation is possible in a closed system.The invention is mainly directed to a process which comprises the steps of bringing a hydrogen sulfide-containing gas into contact with an aqueous iron salt (Fe.sup.3+) solution to carry out oxidation reaction and to thereby produce a solution containing Fe.sup.2+, sulfur and secondarily produced sulfuric acid in a hydrogen sulfide gas absorption-oxidation step, separating sulfur from the solution, electrochemically treating the solution to regenerate the aqueous iron salt (Fe.sup.

Abstract: A hologram plate manufacturing apparatus comprising a copying optical element disposed in opposed relation to a photosensitive surface of a hologram plate. The copying optical element is arranged so that its one surface facing the photosensitive surface of the hologram plate has a plane configuration and its other surface has a convex or concave configuration. On the convex or concave surface there is formed a reflection film for effectively reflecting incident light. Also included a refraction index adjusting layer which is provided between the photosensitive surface of the hologram plate and the convex or concave surface of the copying optical element, the refraction index adjusting layer having an index of refraction substantially equal to indexes of refraction of the hologram plate and the copying optical element.

Abstract: In a monitoring system for protecting a metal pipe against corrosion, transmission of monitoring signals is carried out by the use of the pipe itself as a transmission line between a center station and a substation, which are coupled to the pipe at center and subordinate locations, respectively. The substation sends data signals over the pipe to the center station. These data signals represent the degree of corrosion that is measured at the subordinate location and are monitored by the center station. When a plurality of substations are coupled to the pipe, the center station selects a substation by transmitting through the pipe an address assigned to the substation. Each substation returns the assigned address to the center station in combination with the signals representing the measured degree of corrosion at the addressed substation. Preferably, the center station produces the selected address twice while each substation produces the assigned address and the measured corrosion signal, twice.