Abstract: This invention relates to a method and apparatus for processing yarn defect signals of a plurality of yarns on the on-line base.For this purpose and in the case of the signal processing apparatus according to this invention a large number of yarn defect signals are processed through a scanning device for signal sampling, means is provided for placing possible drop-out signals into respective provisional memories, and preferably in the form of a binary "1" from a binary "0" and for reading out the contents from the memories at the beginning the next succeeding sampling period and for further processing these read-out yarn defects signals, together with regular yarn defects signals under processing through regular samplings.

Abstract: A method of and apparatus for testing a moving elongate strip of material to determine the coefficient of friction with respect to a control sample having known surface characteristics with a predetermined correlation to the surface characteristics normally encountered by the strip of material in use or processing, and/or the proportion of increased tension caused by movement of the strip in contact with the control sample to the original tension in the strip are provided by this invention. This determination is made by moving the elongate strip of material under tension of any magnitude in sliding frictional engagement with the control sample which moves in response to unbalanced forces generated by the incoming tension and the sliding frictional engagement along a predetermined path of travel, preferably arcuate, until the forces exerted on the control sample become balanced at a given position along the path of travel.

Abstract: The present invention relates to monitoring devices of the type making use of the principle that frictional contact between two bodies gives rise to electrical charges or voltages on the bodies. The monitoring device of the invention comprises yarn guiding means, at least one signal electrode and at least one ground electrode. Means are provided for generating yarn travel signals exhibiting improved continuity and a high signal-to-noise ratio.

Abstract: A method and apparatus for sensing the presence or absence of yarns using a simple airflow in an open slot formed between parallel plates, the presence upstream of the proper yarn path being sensed. In one form, the pressure is sensed at multiple points and averaged to accommodate yarn oscillation.

Abstract: A development is provided for monitoring twist on yarn being perferably friction twisted and for automatically adjusting the amount of twist being imparted to the yarn to compensate for a deviation in the amount of twist from that desired. The adjustment and monitoring may be effected on a position-to-position basis. Particularly novel monitoring developments are provided.

Abstract: Faults in produced yarn occurring by fouling of spinning units can be detected by measuring changes in the cross-sectional diameter of the yarn and producing a control signal indicating irregularities. The apparatus of this invention includes a measuring device for measuring the cross-sectional diameter and producing a signal representative thereof, which signal is processed in a discriminator circuit, including at least a correcting circuit with a non-linear characteristic, an integrating circuit and a comparison circuit to compare the integrated signal with a predetermined standard, thereby producing the control signal.

Abstract: A portable frictometer employing the principle of passing a standard yarn sample across a cylindrical surface under test at a fixed wrap angle and detecting the ratio of the yarn tensions at the output and input ends of the wrap. This ratio is related to the coefficient of friction of the surface under test. The apparatus includes a yarn guiding system of two guide pulleys at the extremities of two rigid arms so as to achieve a predetermined fixed yarn wrap on the cylindrical surface under test when the arms are placed to contact and straddle the surface and a tension ratio monitor consisting of a disc rotatably mounted about its center with two small concentric central yarn guide pulleys and two separated peripheral guide pulleys thereon.

Abstract: A yarn measuring instrument having a rotatably mounted operative element whose rotation in response to frictional engagement thereof by travelling yarn cooperates with electronic circuit means to measure a plurality of characteristics of the travelling yarn is provided with means for capturing the travelling yarn and placing it in frictional engagement with the operative element. The yarn capturing means includes an arm which has a free end provided with yarn retaining means. The arm is mounted within the instrument for movement between a projected position thereof in which the yarn retaining means extends outwardly of the instrument and a retracted position thereof in which the yarn retaining means extends inwardly of the instrument, whereby travelling yarn captured in the retaining means when the arm is in its projected position automatically frictionally engages the operative element when the arm is moved to its retracted position.

Abstract: A frequency modulated fluidic gauge having no moving parts for monitoring a characteristic of a continuously moving strand-like material. The gauge is comprised of a fluidic oscillator circuit including a fluidic amplifier, and a fluidic phase shifting network for fluidically coupling an output fluidic signal from an amplifier output port to an amplifier control input port at a phase angle that insures oscillation of an output signal from the amplifier output port at a predetermined frequency which is proportional to the characteristic of the material being monitored. The phase shifting network is comprised of a fluidic capacitor, an enclosed gauging channel for receiving the strand-like material passing therethrough, means for fluidically coupling the output signal from the amplifier output port to the gauging channel, and means for fluidically coupling at least a portion of the output signal to the fluidic capacitor and the amplifier control port.

Abstract: Apparatus in a card for sensing and controlling the relative speeds of the feed and doffer rolls in accordance with the sliver density as sensed by error detection circuitry responding to the amount of a transduced compression wave in the sonic ultrasonic range which passes through the sliver.

Abstract: A method and device for indicating the amount of torque in a yarn is disclosed wherein an elongated horizontal bar assembly has supported thereon a movable cantilevered arm member and a stationary cantilevered arm member having yarn clamps for receiving and clamping the yarn thereto whereby the movable arm member is moved towards said stationary arm member and the point at which the yarn held therebetween twists together into a loop is noted to indicate the torque therein.

Abstract: A method of increasing the long-term stability of a measuring element for a textile testing apparatus, said measuring element including a plurality of parallel plate-like components which comprises causing an artificial airstream to sweep over the top of the measuring element to form a secondary air convection which maintains constant ambient conditions in the vicinity of the measuring element.

Abstract: A knitting machine section block is fitted with one or more strain gauge means, preferably on a backup plate for a needle influencing cam, so that during operation of the machine and without any adverse influence upon the output of the knitting machine, signals may be generated in response to the forces transmitted by the interaction of the knitting needles with the needle influencing cam. By analyzing the signals generated by the strain gauge means, as for instance, by the use of an oscilloscope, patterns representing the actual conditions may be compared with those of usual operation to identify specific part defects or specific abnormal conditions of operation.

Abstract: Device for measuring the force required to untangle hair comprises a handle, a carding member mounted for pivotal movement about the axis of said handle, and a counter for measuring the sum of the amplitudes of successive pivotal movements of said carding member relative to said handle.SUMMARY OF THE INVENTIONIn order to compare the characteristic properties of cosmetic products such as shampoos for example, it is often necessary to compare the property of being more or less easily entangled which they impart to the hair, regardless of the form of the hair itself, whether it consists of locks, wigs, or a head of hair. It is clear that the more the application of a product or composition facilitates untangling, for example, after shampooing, the more advantageous the use of this product or composition is in practice. Up to the present it has been impossible to evaluate the property of facilitating the untangling of hair in other than a subjective manner and this has made it difficult to carry out comparisons.

Abstract: Yarn is continuously supplied to a measuring system with an applied twist of at least 100 turns per meter. A beam having a continuous spectrum from the visible region to the near-infrared region is impinged upon the yarn and measurements are taken on the beams reflected from the yarn. The refected beams are divided into two parts. The characteristics of the near-infrared region are applied to one part, and luminosity characteristics are applied to the other. The ratio of intensity of the former to that of the latter is determined. This ratio corresponds to the uniformity of physical characteristics in the direction of the length of the yarn.

Abstract: An apparatus for maintaining sliver thickness uniform whereby the web from a carding machine is gathered by a trumpet and passed between a grooved driven roller and a sensor roller riding in the groove so that the movements of the sensor roller vary as a function of sliver density. The sensor roller is mechanically connected to a magnetic core so that movement of the sensor roller varies the coupling between a primary transformer winding and a pair of secondary windings. The voltages induced in the secondary windings are applied, after a delay, to a first differential amplifier whose output in turn is connected to a second differential amplifier which is periodically rendered operative by a pulse generator and to which is also connected a potentiometer for adjusting desired density. The output of the second amplifier is connected to a pair of relay coils, one responsive to positive excursions and the other to negative.

Abstract: An apparatus and method for detecting breaks in a travelling threadline of a synthetic filament is described. The motion of the threadline is monitored for speed by means of generating an electrical current by passage of the threadline across an idler roll. Increases or decreases in the speed of the threadline change the frequency of the electrical current generated, thereby providing means for signaling threadline speed changes such as occur in breaks and wrapping of the threadline.