Abstract: A nucleator for foaming comprising a fluororesin powder comprising particles having a particle size of 0.1-0.5 .mu.m in a proportion of at least 50% by number and containing particles having a particle size of not less than 5 .mu.m in a proportion of not more than 40% by number, a foamable composition comprising this nucleator and an organic polymer, a foam made therefrom, and a production method of the foam. The nucleator of the present invention can produce a foam made from an organic polymer improved in expansion ratio, fineness of the cells, uniformity of foaming and the like by the use of an extremely small amount thereof. It is preferably used for forming an insulating foam layer of a high frequency coaxial cable.

Abstract: A wave absorber comprising first foamed particles comprising foamed particles of a thermoplastic organic polymer and a conductive layer formed on the surface thereof, and second foamed particles comprising foamed particles of a thermoplastic organic polymer, the first foamed particles and the second foamed particles being melt-adhered to each other, and a method for producing same. The wave absorber of the present invention is superior in a long-term shape retention, and shows superior wave absorption performance, thereby rendering itself suitable for use in an anechoic chamber.

Abstract: A lithium secondary battery comprising a positive electrode composed of a positive electrode active material comprising an oxide compound comprising at least Li and Ni, and a negative electrode comprising an Li--Ag--Te alloy, a positive electrode active material for a lithium secondary battery, which is composed of an oxide compound represented by the formula:LiNi.sub.w Al.sub.x P.sub.y O.sub.zwherein 0.80<w<1.10, 0<x<0.015, 0<y<0.03 and 1.8.ltoreq.z.ltoreq.2.2, and a lithium secondary battery comprising said positive electrode active material. The lithium secondary battery of the present invention shows large charge-discharge capacity, high energy density, less degradation by the repetitive charge-discharge and is superior in cycle property. The positive electrode active material of the present invention, which is composed of an oxide compound represented by the formula LiNi.sub.w Al.sub.x P.sub.y O.sub.

Abstract: A laser apparatus capable of emitting a laser beam upon wavelength conversion and intensity modulation, which comprises a fundamental wave resonance means comprising a light emitting part, an optical resonator comprising mirrors sandwiching the light emitting part and capable of laser resonating, and a modulation-conversion means set inside said optical resonator, said light emitting part being a semiconductor light emitting element or a laser medium, said modulation-conversion means converting, by a nonlinear optical effect, a fundamental laser resonance wavelength light, and phase modulating said light by an electro-optical effect, and a modulation part of said modulation-conversion means comprising electrodes for application of a modulation voltage.

Abstract: A connector for a coaxial cable is provided which has been miniaturized for facilitating its handling and storage, and also for reducing the cost and the number of its electric contact points. The cylindrical connector main body is fitted onto the end of the coaxial cable and secured thereto. In this case, the split clamp which is fitted around the external conductor is engaged in the concave stage portion so as to expose the edge of the external conductor. Hexagon socket head cap screws are screwed into the attachment holes so as to incorporate the contact spacer into the connector main body. As a result, the edge of the external conductor is bent on the outer side along the split clamp to form a flare unit, which is contacted and pressed against the base end surface of the contact spacer and electrically connected. The central contact is made up of a bar-like member integral with the anchor unit with grooves and the male thread unit in order to reduce its size in the cable axis X direction.

Abstract: A mandrel of a high frequency heating type, comprising a conductive layer comprising a metal member having an aspect ratio of at least 100, in a proportion of at least 60% by volume, and a surface layer formed thereon which is made from an organic polymer, and a method for producing a rubber hose using the mandrel. Inasmuch as the inventive mandrel enables heating the curable rubber extruded on the mandrel, from the inner surface side thereof, the curing time of the rubber can be drastically reduced. Moreover, since the surface layer of the mandrel is composed of an organic polymer, the mandrel can be easily pulled out from the cured rubber layer. The production method of the present invention is free of the difficulty in heating the inside of the rubber layer. The concurrent application of external heating has accomplished continuous production of rubber hose.

Abstract: A safety device detects when a worker's hand enters a hazardous region between rollers of a kneading machine, and stops rotation of the rolls to prevent an accident. Each time the rollers are stopped, the orientation of photoelectric sensors is switched from the vicinity of the gap between the two rollers to a test reflection member, and the quantity of received light is compared to a predetermined value, to prevent workers form starting work without knowing a fault or accident has happened. More specifically, a bar electrode of an electrostatic capacitance sensor is disposed above and near the gap between the two rollers, for detecting a physical quantity that is changed by entry of a worker's hand. When the electrostatic capacitance detected by the sensor exceeds a predetermined value, a judging circuit supplies a control signal to stop a driving unit that operates the kneading machine. Heat ray sensors or photoelectric sensors may be used as alternatives to electrostatic sensors.

Abstract: Electrical connection of an annular corrugated tube having an outer surface shape wherein grooves and ridges are alternately repeated in the axial direction of the tube in a wave form is carried out by cutting the tube at a groove, disposing a clamping member on each side of a ridge at the cut end of the tube and electrically connecting the tube to the clamping member positioned on the cut end of the tube side of the ridge by squashing the ridge with the clamping members.

Abstract: A superconductor comprising a compound of the formula (II):R.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.7-y1 (II)wherein not less than 40% of a crystal of the superconductor shows phase separation, and at (temperature, magnetic field) of (77?K!, O?T!) and (77?K!, 4?T!), a critical current density is not less than 10,000 A/cm.sup.2, which is obtained by heating a precursor which is a solid solution of the formula (I):R.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.7-y (I)wherein not more than 10% of a crystal of the solid solution shows phase separation, so that phase separation is formed in the crystals at a phase separation temperature, and introducing oxygen; and a superconductor comprising a compound of the formula (II):R.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.7-y1 (II)wherein not more than 10% of a crystal of the superconductor shows phase separation, and in a magnetic field of not less than 1?T! at a constant temperature of 77?K!, a critical current density is less than 10,000 A/cm.sup.

Abstract: When a rotating shaft is at a standstill, a first sealing lip of a first sealing element comes elastically into contact with the shaft, thereby preventing a fluid leakage. Annular grooves are formed on the inner peripheral surface of a second sealing lip of a second sealing element so that a wide contact surface pressure can be obtained between each two adjacent grooves. Accordingly, a fluid leaked from the first sealing element is prevented from leaking to the low-pressure side by means of the second sealing lip. When the rotating shaft is rotating, moreover, the fluid from a fluid chamber is allowed to permeate the gap between the outer peripheral surface of the shaft and the inner peripheral surface of the first sealing lip. Thus, the inner peripheral surface of the first sealing lip is lubricated by means of the fluid, so that the first sealing lip can be prevented from wearing or heating.

Abstract: A high power fiber optic connector detachably attached to a connected cylindrical portion having an axial hole portion, a male screw portion, and a key way. This fiber optic connector is provided with a ferrule portion to be inserted into said axial hole portion, a cap nut to be engaged with said male screw portion, and a positioning key portion to be inserted into said key way. This key portion is fixed to be freely changed in a circumferential direction of said ferrule portion.

Abstract: An insulating tape or sheet comprising a polyester film layer and a polyolefin adhesive layer having a flexural modulus of 500-20000 kgf/cm.sup.2. The insulating tape or sheet of the present invention can provide an insulated wire having superior buckling resistance and is very low in cost.

Abstract: A bending mechanism for use with a stereoscope, comprises a tubular body or linear body having a bending part, a movable part which can move in the lengthwise direction of the tubular body or linear body, two actuators formed to act in opposition to each other via the movable part, and a pull wire which extends in the lengthwise direction along the bending part. One end of the wire is fixed to one end side of the bending part and the other end of the wire is fixed to the movable part set at the other end side of the bending part. At least one of the two actuators is a shape memory element. The bending mechanism of the present invention is free from displacement of the movable part when bending action is not needed, since the two actuators are used which act in opposition to each other via the movable part, and thus, buckling of the bending part can be prevented. The simple structure of the activator unit of the present invention facilitates a reduction of the size of the structure.

Abstract: A GaN single crystal having a full width at half-maximum of the double-crystal X-ray rocking curve of 5-250 sec and a thickness of not less than 80 .mu.m, a method for producing the GaN single crystal having superior quality and sufficient thickness permitting its use as a substrate and a semiconductor light emitting element having high luminance and high reliability, comprising, as a substrate, the GaN single crystal having superior quality and/or sufficient thickness permitting its use as a substrate.

Abstract: A lithium secondary battery comprising a positive electrode composed of a positive electrode active material comprising an oxide compound comprising at least Li and Ni, and a negative electrode comprising an Li--Ag--Te alloy, a positive electrode active material for a lithium secondary battery, which is composed of an oxide compound represented by the formula: LiNi.sub.w Al.sub.x P.sub.y O.sub.z wherein 0.80<w<1.10, 0<x<0.015, 0<y<0.03 and 1.8.ltoreq.z.ltoreq.2.2, and a lithium secondary battery comprising said positive electrode active material. The lithium secondary battery of the present invention shows large charge-discharge capacity, high energy density, less degradation by the repetitive charge-discharge and is superior in cycle property. The positive electrode active material of the present invention, which is composed of an oxide compound represented by the formula: LiNi.sub.w Al.sub.x P.sub.y O.sub.

Abstract: A group-III nitride based light emitter such as LED and LD, which has a double heterostructure and which comprises a diffusion suppressive layer between a p-type cladding layer and an active layer. The diode having a diffusion suppressive layer of the present invention has higher luminous intensity, greater forward voltage, and longer lifetime than the conventional diodes.

Abstract: A GaN single crystal having a full width at half-maximum of the double-crystal X-ray rocking curve of 5-250 sec and a thickness of not less than 80 .mu.m, a method for producing the GaN single crystal having superior quality and sufficient thickness permitting its use as a substrate and a semiconductor light emitting element having high luminance and high reliability, comprising, as a substrate, the GaN single crystal having superior quality and/or sufficient thickness permitting its use as a substrate.

Abstract: An apparatus for inspecting an O ring which detects surface flaws of O rings by successively sending O rings by a conveyor, projecting light and inputting pictures of O rings, and processing the pictures. The apparatus is provided with a vibrating screening machine for separating products and flashes removed from the products and feeding the products of O rings to the conveyor.

Abstract: A method for growing a superconductive film, comprising:(a) helically winding a tape substrate around the outer periphery of a cylindrical or columnar holder and(b) growing a superconductive film on the surface of the tape substrate by plasma flash evaporation, while rotating the holder. According to the present invention, the heat contact between the holder and the tape substrate is stabilized and a high performance tape conductor can be obtained. In addition, degradation of superconductive performance possibly experienced, when the tape is used for a transmission cable or the like, can be lessened. Furthermore, the large area growth, which is the characteristic feature of plasma flash evaporation, is effectively utilized and production efficiency of a long tape conductor can be enhanced.

Abstract: In a connector having first and second connecting cylinders and a split clamp, the first cylinder has a pressing portion projecting inwardly radially from the inside of one end thereof and an annular portion extending axially forwardly from one end thereof. The second cylinder has a conductive pressed portion opposing the pressing portion when connected to the first cylinder. The clamp is sandwiched between the pressing and pressed portions and held by the annular portion. When the clamp is pressed by the pressing portion in association with the connection of the cylinders, it clamps one end of an outer conductor of a coaxial cable in cooperation with the pressed portion.