Abstract: The invention concerns a lubricant for powder metallurgical compositions containing 10-60% by weight of a lithium salt of a fatty acid; 0-40% by weight of a zinc salt of a fatty acid and 40-90% by weight of a fatty acid bis-amide. 10-60% by weight of the lubricant is made up by the lithium and the zinc salt.

Abstract: A method of automatically transferring an elastic yarn from a full-bobbin to an empty-bobbin characterized in that the yarn transfer operation is performed in a state such that a friction roll is remote from the empty-bobbin around which a yarn to be transferred is wound, and the yarn to be transferred is wound on the empty-bobbin by stopping the full-bobbin.

Abstract: A front and rear wheel steering system for a vehicle which transmits a steering input from a front wheel steering gear box to a rear wheel steering gear box via a coupling shaft as a rotation thereof around its longitudinal line and varies a steering gear ratio of rear wheels to front wheels according to the speed of the vehicle. A steering rod for steering the rear wheels with its longitudinal movement is provided with a crank portion which is engaged with a swing shaft pivotally attached to the coupling shaft via a pivot shaft perpendicular thereto so as to perform a gyrating motion around an extension line of the coupling shaft and thereby move the steering rod along its longitudinal direction to achieve a steering action of the rear wheels.

Abstract: An apparatus for steering the front and rear wheels of a motor vehicle includes a front wheel steering mechanism for steering the front wheels in response to operation of a steering wheel, a rear wheel steering mechanism for steering the rear wheels at least in the same direction as the direction in which the front wheels are steered, and a connector shaft mechanically interconnecting the front and rear wheel steering mechanisms. A rotation control mechanism employing a viscous fluid is mounted on the connector shaft for applying a resistive force dependent on the speed of rotation of the steering wheel to the connector shaft.

Abstract: A structure for preventing oil from being contaminated in a hydraulically operated power steering system for use in a motor vehicle has a cylindrical permanent magnet disposed in a working oil chamber housing a rack of an iron-base material and a pinion meshing therewith. The cylindrical permanent magnet has a central opening through which the rack extends, the cylindrical permanent magnet having magnetic poles positioned along a direction parallel to the axis of the rack.

Abstract: A steering system for a motor vehicle includes a centering mechanism for establishing a neutral steering position. The steering system includes a steering wheel and a steering assembly for steering vehicle wheels in response to angular movement of the steering wheel. The centering mechanism is mounted on at least a portion of the steering assembly for establishing the neutral steering position of the steering assembly.

Abstract: A steering device for steering front and rear wheels of a motor vehicle has a steering gear box for the front wheels and a steering gear box for the rear wheels. The front wheel steering gear box includes a first rack shaft operatively coupled to the front wheels, a first input shaft and an output shaft operatively coupled to the first rack shaft. The rear wheel steering gear box includes a second rack shaft operatively coupled to the rear wheels and a second input shaft operatively coupled to the second rack shaft. The output shaft and the second input shaft are interconnected by a linkage shaft. The second input shaft has an end inserted into the rear wheel steering gear box and inclined downwardly. The rear wheel steering gear box is supported on the vehicle frame for tilting movement around the second rack shaft.

Abstract: A false-twisted polyester yarn of good dyeing and mechanical properties is produced by a process wherein a yarn consisting of an as-spun polyester fiber having a mean birefrigence index (.DELTA.n) of from 15.times.10.sup.-3 to 150.times.10.sup.-3 is heat-treated and continuously, subjected to a false twisting treatment or draw-false twisting treatment. A preferred apparatus used comprises a feed yarn creel, a false twisting heater and an optional stabilizing heater, a false twisting element and a winder, wherein a heat-treating heater of the non-contact type is arranged upstream of the false twisting heater and between the false twisting heater and the feed yarn creel, at a height substantially equal to the height of the feed yarn creel so that the heat-treating heater confronts the false twisting heater; and a yarn cooling zone is provided between the heat-treating heater and the false twisting heater.