Abstract: A method for correction of the counting error in liquid scintillation counting in the attenuation of light passing through a sample solution is measured before or after the actual liquid scintillation counting takes place. By means of the attenuation measurement the error in the liquid scintillation counting result, caused by the colorness of the sample solution, and/or by the counting apparatus, is corrected. The apparatus has a liquid scintillation counter provided with cylinder shaped optics. A photometer is incorporated in the liquid scintillation counter. By means of the photometer, the attenuation of light passing through the sample solution is measured before or after the actual liquid scintillation counting measurement, where said attenuation is caused by the colorness of the sample solution and/or due to features of the apparatus.

Abstract: The present invention provides a heat sensitive recording material comprising a substrate and a heat sensitive recording layer formed thereon and having incorporated therein a colorless or light-colored basic dye and a color acceptor reactive with the dye when contacted therewith by heating, the heat sensitive recording material being characterized in that the heat sensitive recording layer has incorporated therein a polyvinyl alcohol having an average polymerization degree of at least 1000 and a saponification degree of up to 90 mole %, and a modified starch.

Abstract: Disclosed is a process for preparing crystals of anhydrous sodium sulfide, the process being characterized in that the process comprises the steps of heating crystals of polyhydrate of sodium sulfide under a pressure of about 500 torr or less at a temperature varying not more than .+-.about 10.degree. C. from the phase transition point between polyhydrate crystals and monohydrate crystals of sodium sulfide for about 2 hours or longer and further heating the monohydrate under atmospheric or reduced pressure at about 90.degree. to about 200.degree. C. for about 2 hours or longer.

Abstract: A jaw crusher with a pass-through preventing device which prevents a flat plate-shaped object from passing through without being crushed. Also disclosed is a jaw crusher with a tooth plate structure which is capable of effectively crushing a non-rigid object, for example, a lump of asphalt, without causing such an object to stick to the area between a cheek plate and a fixed tooth plate or a movable tooth plate. The jaw crusher comprises a plurality of forks which are provided at the lower end of a crushing space to prevent a plate-shaped object from passing through the crushing space without being crushed, and a fork shaft which is provided with one end of each fork and which is rotatably provided on the crusher body. The movable tooth plate is provided with cutting projections. A plate-shaped object is first broken by the cutting projections and then crushed by intermediate projections.

Abstract: A fiber reinforced composite belt in which a stainless steel fiber aggregate having a diameter of from 5 to 50 .mu.m and impregnated with 1 to 10% by weight of a thermosetting resin such as an epoxy resin is buried as a reinforcing material in a base material for belt, and a process for preparing the above-mentioned fiber reinforced composite belt are provided. This fiber reinforced composite belt is much more excellent in flex resistance, durability, water resistance and coefficient of linear expansion, as compared with not only a rubber belt and a synthetic resin elastomer belt but also belts reinforced by directly burying a stainless steel fiber and a steel fiber in the rubber.

Abstract: In a process or an apparatus for producing an oxide superconductive material by firing, a gas passage is formed in a firing furnace and a material to be fired, consisting of a ceramic superconductive powder and/or a powder expressing superconductivity when heated, is placed in the gas passage. A gas is passed through the gas passage in one direction to contact with the material. A both ends-opened cylindrical inorganic material is provided in a firing zone of a muffle of a bell-shaped furnace, and a bottomed cylindrical material of a substrate and an oxide superconductive layer is provided inside or outside the both ends-opened cylindrical inorganic material.

Abstract: In a control system wherein slippage of a vehicle drive wheel is detected and when the slip is excessively large, an engine output or drive wheel torque is reduced, there are provided means for calculating the grip force of the drive wheel and further means for changing the reduction amount of engine output or drive wheel torque, or the reduction speed, or the reduction characteristic dependent on a signal from the grip force calculating means. This enables a sporty travel of a vehicle.

Abstract: A compound represented by formula (I). ##STR1## wherein R represents a straight chain alkyl group having 1 to 7 carbon atoms; n is an integer of 1 to 5; X represents F, Cl or CN; Y represents H or F; and a dioxane ring in a trans configuration with respect to a cyyclohexane ring.

Abstract: An arrestor unit is disposed between the line and earth sides of transmission lines and in parallel with an insulator by way of aerial discharge gap. Arrestor units accommodated in the arrestor unit is activated by reference voltage larger than a nominal line to ground voltage of the lines and less than the overvoltage of sound phase due to single phase ground fault.

Abstract: In a twin clutch, a positioning member 23 and a reverse movement obstruction member 21 are installed on an outer periphery of an intermediate plate 11. Projections 32 extend from the positioning member 23 and elastic lingual pieces 29 extend from a reverse movement obstruction member 21 respectively. A movement of the positioning member 23 to a pressure plate 5 side relative to the reverse movement obstruction member 21 is obstructed by an engagement of the elastic lingual pieces 29 with the projections 32. A movement of the positioning member 23 relative to the reverse movement obstruction member 21 is allowed only to the flywheel 5 side. Therefore, a force can be minimized which is required to move the positioning member 23 to the flywheel 5 side according to a wear of the first clutch disc 15, and a load reduction under a clutch engaged state can be decreased preferably.

Abstract: A fluorine-containing copolymer for paints, having Mn of 5000 to 50000 and Mw/Mn of 2 to 10, which consists essentially of 30 to 70% by mole of the fluoroolefin unit, 15 to 45% by mole of the vinyl ether or vinyl ester unit, 1 to 30% by mole of the hydroxyalkyl vinyl ether unit, and 4 to 30% by mole of the carboxyl-containing unit wherein the carboxyl group is neutralized in an amount of 30% or more with ammonia or a tertiary amine. This copolymer can give a god coating film without water spots and dewetting as well as with a good levelling property, while maintaining the excellent properties which a fluorine resin has be nature.

Abstract: The rotary plate of the cam member is formed with cam grooves symmetrical about the rotating shaft of the rotary plate. The rotating shaft has a rotary retainer plate at its end. A pair of mating housings are each provided with a cam follower pin that engages with the respective cam grooves. One of the housings is formed with a pin guide groove that guides the rotating shaft of the cam member and the cam follower pin of the other housing. At the dead end of the pin guide groove is formed an enagement completion opening from which the rotary retainer plate can be pulled out when the both housings are completely engaged together.

Abstract: In an air intake device in a helmet, an air introducing unit is comprised of a base plate, a cover, and a shutter contained in a shutter chamber defined between the base plate and cover, and the base plate is detachably secured to a mounting plate within a cap body at a point facing to an inlet hole in the cover. If an air intake device mounted to the cap body to ventilate the inside of the cap body becomes dirty due to the entering of dusts, muds or the like the shutter and the like of the air intake device can be removed and readily cleaned by washing with water or the like.

Abstract: A woven fabric for covering a tooth part formed on a belt body of a synchronous belt is woven with a lengthwise yarn and a widthwise yarn. The lengthwise yarn is made of a crimped yarn of synthetic fiber or a covering yarn in which a crimped yarn of synthetic fiber is wound around an elastic cord yarn. The widthwise yarn is made of a spun yarn of synthetic fiber or meta-linked type aromatic polyamide fiber. The widthwise yarn expose more to the woven fabric surface than the lengthwise yarn. Thus, the belt life is lengthened and the noise reduced.

Abstract: A swing head arm type magnetic disc apparatus includes a magnetic disc having a data R/W zone and a CSS zone, and is accommodated in a housing and a spindle rotably supported on the housing, a head arm provided with a floating-type magnetic head and secured to the spindle, a motor for driving the spindle when a seek operation is performed, and apparatus for imparting torque to the spindle. The torque imparting apparatus imparts torque such that the total torque obtained by summing up torque provided by a head arm and the torque by the torque imparting apparatus itself is made uniform irrespective of rotational position of a head arm, and acts in a direction which causes the magnetic head to move toward the CSS zone.

Abstract: An air-fuel ratio control system for an internal combustion engine using an alcohol blended fuel, in which an alcohol concentration-dependent correction coefficient for use in calculating an amount of fuel supplied to the engine is calcuated in response to concentration of alcohol in the fuel defected by an alcohol concentration sensor. An average value of the correction coefficient is calcuated depending on operating conditions of the engine. The amount of fuel supplied to the engine is calculated by the use of the average value of the correction coefficient to thereby control the air-fuel ratio of an air-fuel mixture supplied to the engine.

Abstract: The counting error due to variations in the counting efficiency as a function of the volume of the sample is corrected. The sample is placed into a sample container which is placed into a vertically positioned cylinder shaped counting chamber. Photomultiplier tubes are disposed on the opposite ends of the counting chamber. At least two of the following spectra are measured in the coincidence counting: the sum spectrum q observed by both of the photomultiplier tubes, the spectrum q(y) observed by the upper photomultiplier tube and the spectrum q(a) observed by the lower photomultiplier tube. The counting error is corrected by the correction coefficient obtained from these spectra.

Abstract: A prism is installed at a lower part of the windshield near the dashboard with a first surface of the prism directed toward a viewing point of a driver and a second surface held in contact with the inner side of the windshield. The first or second surface of the prism is made a reflecting surface. The third surface is formed with a dark paint layer. The apex of the prism where the first and second surfaces join is tilted toward the driver seat in such a manner that the second surface becomes a total reflection surface for light from the third surface with respect to the viewing point of a driver. The display image of an indicator installed in the dashboard below the prism is reflected either by the first or second reflecting surface of the prism toward the driver's viewing point. Light from the dark third surface of the prism is totally reflected by the second surface toward the driver to provide a dark background for the display, enhancing the display contrast.

Abstract: A copolymeric amphiphilic polyimide precursor having the recurring unit of the formula (1): ##STR1## wherein R.sup.1 is a tetravalent group having at least 2 carbon atoms, R.sup.2 is a bivalent group having at least 2 carbon atoms, and R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are hydrogen atom or a monovalent group having 1 to 30 carbon atoms selected from the group consisting of an aliphatic group, an alicyclic group, an aromatic group, a group in which an aliphatic group is combined with an aromatic group, or an alicyclic group, and their groups substituted by a halogen atom, nitro group, amino group, cyano group, methoxy group or acetoxyl group, provided that at least one of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is neither hydrogen atom nor the above-mentioned group which has 1 to 11 carbon atoms; a part of at least one of said R.sup.1 and said R.sup.2 being substituted with a group having a valence different therefrom.

Abstract: In an endoscope of this invention, an electroconductive member is exposed in at least a part of an insertable section to be inserted into an inspected object in which either pole of a battery is earthed and, in the course leading from the electroconductive member exposed in the insertable section to an external apparatus, an insulating member electrically insulating the electroconductive member and external apparatus is provided.