Abstract: A potentially elastic composite filament, preferably a core-sheath composite filament composed of a polyurethane as the core and a polyester as the sheath, wherein the ratio of a polyurethane component having allophanate cross-linkages to a linear polyester component readily soluble in water or an aqueous alkali solution ranges from 1/1 to 90/1 and the polyester component is exposed on the surface of the filament in its cross-section. Although the core component has a high tensile strength and a large elongation at break, these properties are controlled by the sheath component. Therefore, this filament can be formed into a textile structure with good workability similar to that of ordinary synthetic fibers, and the obtained structure develops characteristics as an elastic polyurethane filament when treated with water or alkali.

Abstract: A pressure vibration damping device in a liquid supply passage for supplying a liquid from a pump to a hydraulic device such as a fluid pressure type suspension of a vehicle, including a pressure pulse absorbing means adapted to be able to accept and return a small amount of the liquid from and to said liquid supply passage so as to absorb momentary changes in the flow rate of the liquid in the liquid supply passage, and a liquid column vibration damping means adapted to be able to apply a substantial flow resistance principally to a high velocity flow of the liquid in the liquid supply passage at a part thereof between the pump and the pressure pulse absorbing means, the high flow velocity being due to pulse flows of the liquid induced by a resonance of pulsating output of the pump and the pressure pulse absorbing means and substantially higher than a mean flow velocity of the liquid corresponding to a normal rate of supply of the liquid through the liquid supply passage.

Abstract: An electric power steering system includes a steering torque detecting device for detecting a steering torque applied between an input shaft connected to a steering wheel and an output shaft connected to a steering gear in response to an elastic deformation of an elastic member connecting the input shaft with the output shaft, an electric motor whose rotation is controlled by a control signal from a control device in response to a detecting signal from the steering torque detecting device, and a clutch device interposed between the electric motor and the output shaft and controlling an intermittent transmission of the rotation of the electric motor to the output shaft in response to the elastic deformation of the elastic member. Thereby, it is possible to improve the safety performance, the reliability and the steering wheel feeling of an electric power steering system.

Abstract: There is disclosed a copolyester which comprises at least four compositions of: (A) terephthalic acid, and/or its ester forming derivative (terephthalic acid component) and isophthalic acid and/or its ester forming derivative (isophthalic acid component) with a molar ratio of 30/70 to 70/30; (b) 5 to 15 mole % of a dicarboxylic acid having sulfonate group and/or its ester forming derivative based on the all dicarboxylic acid components; (C) an alicyclic dicarboxylic acid and/or its ester forming derivative; and (D) 50 mole % of ethylene glycol based on the all glycol components; and a polyester film which comprises a subbing layer containing the copolyester provided on at least one side of a polyester film base.

Abstract: A torque detecting device, which is typically used for detecting a steering torque in a motor vehicle, includes a mechanism for converting the torque applied to an input shaft to an axial force between the input shaft and an output shaft. A slider is fitted about the output shaft movably axially along the output shaft and rotatably about its own axis with the output shaft. The axial movement of the slider is electrically detected. An elastic body is provided for returning the input shaft to its neutral position. The converting mechanism has a pin extending through the input shaft at right angles thereto and having two ends projecting therefrom. A pair of slits each having a pair of ends are formed in the output shaft. Each of the ends of the pin is located in one of the slits engageably with either end thereof. A bearing is secured to one end of the pin. A spiral groove is formed in the slider and one end of the pin extends into the groove to dispose the bearing therein.

Abstract: An ink jet printer having a print head which comprises a front nozzle member having a front channel, a housing secured to the front nozzle member, and a rear nozzle member which defines with the housing a liquid chamber and further defines with the front nozzle member a laminar airflow chamber. The rear nozzle member has a forwardly projecting nozzle and a rear channel extending from the liquid chamber through the projecting nozzle in axial alignment with the front channel to form a meniscus at the front end. An electric field gradient is established between the front channel and the meniscus to cause the latter to extend toward the front channel and expelled through the front channel. A portion of the front nozzle member is rendered liquid-repellant to prevent the field distribution from being seriously disturbed by an ink layer formed on it by stray liquid particles.

Abstract: An ink jet printer having a print head which comprises a front nozzle member having a front channel, a housing secured to the front nozzle member, and a rear nozzle member which defines with the housing a liquid chamber and further defines with the front nozzle member a laminar airflow chamber. The rear nozzle member has a forwardly projecting nozzle and a rear channel extending from the liquid chamber through the projecting nozzle in axial alignment with the front channel to form a meniscus at the front end. The airflow chamber is connected to an air supply for directing air to a point between the front and rear channels so that it creates a sharp pressure gradient along a path therebetween. A dead air region is created in a location adjacent the exit end of the rear channel to cause the meniscus to take a dome-like shape which is stabilized against vibrations and transients.

Abstract: An electric power steering apparatus comprising an axial conversion mechanism includes a slider for converting the relative rotation between an input shaft and an output shaft to an axial deviation. A first sensing unit senses axial deviation of the slider. It includes a lever with a torque sensing element fixed thereto with the lever fixed at one end and supported at the other end by the slider. A second sensing unit senses the direction of rotation, or the direction and torque of rotation, of a steering wheel. A controller compares the output signals from the first and second sensing units and controls the direction and torque of rotation of an electric motor which contributes to the steering force. The comparison value between the signals from the first and second sensing units is used to stop the motor when the comparison value is outside a predetermined range.

Abstract: A thermally insulating casing accommodates an infrared ray sensing element. The casing has a window which conducts infrared ray to the sensing element. The window is covered with heat absorption gas. An infrared ray emitting element may be accommodated within the casing. The casing may have a second window which passes infrared ray generated by the emitting element. The second window may be covered with the heat absorption gas.

Abstract: A power steering system uses an electric motor to produce an auxiliary torque which is added to the torque applied to the steering wheel of a vehicle by the driver. The system includes a couple mechanism for coupling the motor to the steering shaft. The system further includes a converting mechanism for converting a part of rotating force in the motor in an axial force and installed in the coupling mechanism and an elastic member for absorbing the axial force and installed in the coupling mechanism. This permits the elastic member to absorb the momentary shock occurred at starting condition of motor due to backlash of gears in the coupling mechanism.

Abstract: In an ink jet printer, a print head comprises a front nozzle member having a front channel, a housing secured to the front nozzle member, and a rear nozzle member which defines with the housing a liquid chamber and further defines with the front nozzle member a laminar airflow chamber. The rear nozzle member has a forwardly projecting nozzle and a rear channel extending from the liquid chamber through the projecting nozzle in axial alignment with the front channel to form a meniscus at the front end. The airflow chamber is connected to an air supply for directing air to a point between the front and rear channels so that it creates a sharp pressure gradient along a path therebetween. A dead air region is created in a location adjacent the exit end of the rear channel to cause the meniscus to take a dome-like shape which is stabilized against vibrations and transients.

Abstract: A power steering system uses an electric motor to produce an auxiliary torque which is added to the torque applied to the steering wheel of vehicle by the driver.

Abstract: A torque detector is provided, which functions in such a manner that as torque is applied between an input shaft and an output shaft, an angular displacement is produced between the input shaft and the output shaft, this angular displacement is converted into an axial displacement by means of a torque-axial displacement converting mechanism to bend a cantilever fixed between a housing and the torque-axial displacement converting mechanism, by means of a strain gage attached to the cantilever the deformation of the cantilever is converted into a change of electric resistance, and by causing a current to flow through the strain gage the torque applied between the input shaft and the output shaft is converted into a voltage.

Abstract: A method of producing abrasive fibers is disclosed, which comprises providing a conjugate fiber comprising at least one abrasive layer containing abrasive particles and at least one coating layer substantially covering the abrasive layer, and removing at least a part of the coating layer from the conjugate fiber with a solvent or a decomposer to expose at least a part of the abrasive layer from the coating layer.

Abstract: An ink jet printing head comprises a laminar airflow chamber having a front channel through a combined stream of air and ink droplets is discharged toward a writing surface, and a rear channel provided through an insulative plate and axially aligned with the front channel connected to a source of liquid. The chamber is further provided with an air intake connected to a pressurized air supply source for directing an airstream to a point between the front and rear channels so that the airstream makes a sharp turn at the entry into the front channel with the result that a sharp pressure gradient is produced in the liquid discharge path. A first electrode is provided around said front channel and second electrode is provided on a rear side wall of said insulative plate around said rear channel.

Abstract: An ink jet recording sheet comprising a paper support applied on at least one surface thereof or internally with a composition which comprises an aqueous dispersion of polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymer or a mixture thereof serving as a binder or sizing agent and a white filler. The white filler is contained in a weight ratio, to the binder, of 10:1 to 0.2:1 when the composition is applied on the surface of the paper support. When the composition is internally incorporated in the recording sheet, it comprises 10 to 60 parts by weight of the filler and 2 to 20 parts by weight of the binder per 100 parts by weight of pulp.

Abstract: Conductive composite filaments are disclosed that are formed by conjugate-spinning a conductive component composed of a thermoplastic polymer and/or a solvent soluble polymer and conductive metal oxide particles and a non-conductive component composed of a fiber-forming polymer.

Abstract: An ink jet recording sheet comprising a paper support applied on at least one surface thereof or internally with a composition which comprises an aqueous dispersion of polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymer or a mixture thereof serving as a binder or sizing agent and a white filler. The white filler is contained in a weight ratio, to the binder, of 10:1 to 0.2:1 when the composition is applied on the surface of the paper support. When the composition is internally incorporated in the recording sheet, it comprises 10 to 60 parts by weight of the filler and 2 to 20 parts by weight of the binder per 100 parts by weight of pulp.

Abstract: In a nonimpact printer a device is provided for feeding a constant pressure fluid to a nonimpact printing head reciprocally movable to scan across a recording sheet. The feeding device is formed with a pair of identical first and second chambers connected respectively to first and second sections of a conduit through which the fluid is supplied from a source to the device. Fluid communication is established between the first and second chambers by a connecting channel which is smaller in cross section than the cross section of the first and second chambers and is connected to the printing head through a narrow passageway.

Abstract: Conductive composite filaments are disclosed that are formed by conjugate-spinning a conductive component composed of a thermoplastic polymer and/or a solvent soluble polymer and conductive metal oxide particles and a non-conductive component composed of a fiber-forming polymer.