Abstract: A preformed material for use in fiber reinforced plastics is formed by laminating and integrally bonding a plurality of sheet-like substrates comprising reinforcing fibers. At least one of the laminated substrates is a woven fabric substrate having bonding material composed of a thermoplastic polymer pre-adhering to the substrate and extending substantially linearly along reinforcing yarns or auxiliary filamentary yarns of the substrate. Due to the bonding material the substrates of the preformed material are effectively bonded to each other even if the amount of the bonding material is small, no deterioration occurs in the arrangement and the distribution of the reinforcing fibers, no dislocation of the substrates occurs during a manufacturing process, and excellent characteristics of and a high productivity for forming the fiber reinforced plastics can be obtained.

Abstract: An amplitude equalizer which adds the outputs of two circuit means having opposite characteristics, whereby a flat delay-frequency characteristic and powerful frequency-amplitude characteristic are obtained. Further, a variable amplitude equalizer including two of the same connected in parallel and a variable attenuator inserted in one of the parallel paths. Still further, an automatic amplitude equalizer wherein the variable attenuator is feedback controlled by an equalization residual. The amplitude equalizer includes a minimum phase circuit and non-minimum phase circuit connected in series.

Abstract: A thread comprising plural carbon fiber strands having a first twist of 80 turns/m or more and plied and twisted to give a final twist of 50 turns/m or more in the direction reverse to the first twist. The thread has a fineness of 3000 denier or less and a knot strength of 1.0 g/denier or more, and the single fibers of the carbon fiber strands constituting the thread each have a fineness of 0.7 denier or less and a loop breaking strain of 2.5% or more.

Abstract: An optical fiber unit for forming high-density optical cables in optical communication networks includes a core body having a twisted tensile strength member extended along the central axis thereof, spiral grooves in the outer surface thereof, and tape-shaped optical fibers placed in the spiral grooves of the core body, with the twist direction of the twisted member and the spiral direction of the grooves being opposite one another. Thus, when the core body is under tension, the angular moment produced in the tensile strength member and that produced in the ribs formed between the spiral grooves are opposite in direction and equal in magnitude, whereby the angular moment of the entire core body is substantially zero. As a result, the optical fiber residual strain produced during manufacture can be controlled with high precision.

Abstract: A tape and slot type optical cable having a core with groove dimensions that hold tape shaped optical fibers and also improve the transmission and mechanical strength characteristics of the optical cable. The dimensions require that for a groove having a depth D.sub.S and a width W.sub.S and a predetermined plurality n of optical fiber bundles of thickness T and width W.sub.T that the equations following equations be satisfied:1.2<(W.sub.S /W.sub.T)<1.451.3<(D.sub.S /nT)<1.

Abstract: Acaricides characterized by containing at least one member selected from phenyl salicylate, diphenylamine, methyl .beta.-naphtyl ketone, coumarin, phenethyl benzoate, benzyl salicylate, N-fluorodichloromethyl-thio-cyclohexene-dicarboxyimide, p-nitrobenzoic acid methyl ester, p-chlorometaxylenol, .alpha.-bromocinnamic aldehyde, 2,5-dichloro-4-bromophenol, N,N-dimethyl-N'-tryl-N'-(fluorodichloromethylthio)-sulfamide, 2-phenyl-phenol, sodium 2-phenyl-phenolate, 5-chloro-2-methyl-4-isothiazoline-3-one, 2-methyl-4-isothiazoline-3-one and benzimidazolyl methyl-carbamate as an active ingredient.

Abstract: A retractable headlamp mounting structure includes a fixed bracket mounted on an automobile frame for supporting a motor, a movable bracket pivotally supported on the fixed bracket for holding a headlamp, and a link having one end connected to the movable bracket and another end connected to the motor, the motor being energizable to cause the movable bracket to be angularly moved through the link between a position at which the headlamp projects out of the automobile hood and a position at which the headlamp is retracted within the hood. The fixed bracket is disposed on the side of a radiator support facing the rear of the automobile to shorten the distance between the radiator support and the front bumper of the automobile.

Abstract: A fiber material for reinforcing plastics prepared by laminating at least one first fiber substrate in which the reinforcing fibers extend in two directions including the longitudinal direction and the transverse direction intersecting therewith at a substantially right angle with at least one second fiber substrate in which the reinforcing fibers extend in two directions including directions having angles of .+-.(25-65) degree relative to the longitudinal direction.

Abstract: A retractable lamp device for vehicles includes a vehicles includes a vehicle body having a space for accommodating a lamp, a cover member rotatably mounted on the body to open or close the space, a motor for rotating the cover member. The retractable lamp further includes a movable member connected to the motor and an adjusting member for adjusting the surface level of the vehicle body and the cover member from outside of the vehicle.

Abstract: An elastomeric optical waveguide comprising a core and a cladding surrounding the core in which at least the core comprises an elastomer to which elasticity is imparted by irradiation of a radioactive ray, which has low attenuation of light transmission.

Abstract: A cross-linked optical siloxane polymer having a group for modifying a refractive index of the polymer which is introduced in a side chain of the polymer by a hydrosilyl reaction of one of the following systems:(1) a compound (A) having a carbon-carbon unsaturated bond and a group for modifying a refractive index, and a siloxane polymer (B) having a silicon hydride group wherein the molar ratio of the silicon hydride group to the carbon-carbon unsaturated bond is more than 1, and(2) a compound (A') having a silicon hydride group and a group for modifying a refractive index, and a siloxane polymer (B') having a carbon-carbon unsaturated bond wherein the molar ratio of the carbon-carbon unsaturated bond to the silicon hydride group is more than 1,the polymer being cross-linked by a hydrosilyl reaction of the unreacted silicon hydride groups of the silixane polymer (B) with a compound (C) having at least two carbon-carbon unsaturated bonds when the system (1) is used, or by a hydrosilyl reaction of the unreacted

Abstract: An optical fiber cable in which plural optical fibers are joined in a flat assembly. Each assembly is coated with a water-swelling resin, stacked with other such flat assemblies and fitted in a spiral groove of a spacer. A tape is wound around the so-fitted spacer.

Abstract: An optical element integrated optical waveguide comprising (1) a polymeric supporting member a length of which lies in a light transmission direction and which has at least one bore along its entire length, (2) at least one optical waveguide part consisting of organic siloxane polymer filling at least one bore, and (3) at least one optical element embedded in the optical waveguide part is provided.

Abstract: An optical sensor which comprises an optical waveguide comprising a cladding and an optical waveguide member made of a transparent elastomer which is surrounded by the cladding and through which light is propagated, wherein an amount of light to be propagated through the waveguide member is changed according to a degree of elastic deformation of the waveguide member, which is not affected by electrical and/or magnetic fields.

Abstract: A novel ketene S,S-acetal derivative which is useful as an antimycotic agent and an agricultural chemical of fungicidal, plant growth regulating or insecticidal properties represented by the general formula (I): ##STR1## wherein R represents a hydrogen atom; an alkyl group having 1 to 8 carbon atoms; a cycloalkyl group having 3 to 6 carbon atoms; a methylene group; a lower alkenyl group; a lower alkyl group substituted by a halogen atom, a cyano group, a lower alkoxyl group, a lower alkylthio group; a carbamoyl group, an acyl group, or an alkenoyloxy group; a phenyl group represented by ##STR2## (in which R.sub.

Abstract: A heavy metal can be removed from waste water, in which the metal is contained as ions, by adding to the waste water a metal scavenger together with at least one of sodium monosulfide, sodium polysulfides and sodium hydrogensulfide to form a metal ion containing floc. The resulting floc is then removed from the waste water by filtration. The metal scavenger contains at least one carbodithio group and/or at least one carbodithioate salt group as N-substituents per molecule.

Abstract: An elastomeric optical fiber comprising a core made of an elastomer with rubbery elasticity and a cladding surrounding the core and having low attenuation of light transmission is produced by a method comprising flowing down a liquid polymer for the core with cross-linking it, and simultaneously with or after the formation of the core, providing the cladding around the core.

Abstract: An endoscope for image-observing or measuring an area filled with an opaque liquid is disclosed. The endoscope comprises an image fiber, a lens positioned at the leading end of the image fiber, a light guide arranged in parallel to the image fiber, a transparent fluid transport passage arranged in parallel to the image fiber and the light guide and having an outlet at the leading end thereof, a sheath enclosing the image fiber, lens, light guide and transparent fluid transport passage and a means for providing a field of vision at the leading end of the endoscope by a transparent fluid from the outlet of the transparent fluid transport passage. A means for stabilizing the field of vision formed by the field of vision providing means is provided on the leading end portion of the sheath.

Abstract: A metal scavenger is composed of an addition product of a polyamine and an epihalohydrin. The addition product contains as substituent or substituents at least one carbodithio group and/or at least one carbodithioate salt group introduced therein by substituting the corresponding number of active hydrogen atom or atoms in the addition product. Metals can be scavenged from waste water by adding the metal scavenger together with at least one of sodium monosulfide, sodium polysulfides and sodium hydrogensulfide.

Abstract: A metal scavenger is composed of an addition product of a polyamine and an epihalohydrin. The addition product contains as substituent or substituents at least one carbodithio group and/or at least one carbodithioate salt group introduced therein by substituting the corresponding number of active hydrogen atom or atoms in the addition product. Metals can be scavenged from waste water by adding the metal scavenger together with at least one of sodium monosulfide, sodium polysulfides and sodium hydrogensulfide.