Abstract: A binding for bundles of fibers in which fibers originating from at least one of the fiber bundles wind around the rest of the fibers in a manner locked by tension. Fiber bundles which are to be bound are deformed between deformation members and fibers are removed from at least one of the fiber bundles and are wound in a manner locked by tension around the remainder of the remaining pieces of fibers to be bound. Deformation members are positioned very close to each other, each having a profiled surface, and they can be driven in opposite directions with respect to each other. The fiber bundles which are to be bound are deformed in the gap between the deformation members.

Abstract: A method of adjusting a given pretension in threads on tensile strength testing apparatus. A force measuring device is used as an adjusting member for the pretension, from where the tensile load increases and the elongation thereby appearing is measured. The loose thread inserted into the thread clamp is either pretensioned by means of a movable testing clamp, or the thread is stretched by a transport device until the force measuring device indicates the given pretension value.

Abstract: An apparatus for inserting a thread between the testing clamps of a tensile strength testing apparatus has an insertion clamp which can travel vertically on a slide movable on a vertical rail which is also movable horizontally, whereby movement of the insertion clamp in orthogonal directions is possible. An automatic control mechanism is operable to command a drive arrangement for the insertion clamp to move the clamp along any desirable path which carries the thread to the required position in the testing apparatus.

Abstract: A method and device for detecting the presence of a running thread takes advantage of the inherent physical irregularities of the thread to generate an alternating current signal as the thread passes through a capacitive element. The variations in capacitance resulting from the running thread are detected and amplified as an alternating current electrical signal, which disappears instantly with thread stoppage or breakage.

Abstract: An apparatus for cleaning a test electrode in process control and chemical engineering. The apparatus includes a storage container from which a cleaning solution is intermittently drawn in by a pneumatically operating peristaltic pump. The pump supplies the cleaning solution to a nozzle which sprays the solution on the electrode.

Abstract: An apparatus for controlling a plurality of spinning stations by evaluating yarn signals based upon detection of approximately periodic variations in yarn cross section provides for conversion of the signals to digital form and application of the digital signals to a microcomputer in which the sum of the differences between the original yarn signal and a yarn signal delayed in time is continuously formed. Specific fault signals are produced from the summed differences which are checked against predetermined reference values.

Abstract: A method and apparatus for evaluating yarn signals having at least an approximately periodic component superimposed on an irregularity provides for determining the polarity values of successive signal components using a comparator and the evaluation of coincidence of such polarity values during a predetermined period using counting means.

Abstract: In monitoring a continuous sequence of work positions on a textile machine for thread breakage, a magnetic probe is driven along a path adjacent the ring traveler at each work position so as to generate a signal upon detection of the traveler as it rotates with the thread and provide no signal when the traveler ceases to rotate due to thread breakage. To simplify the electrical connection to the probe, the drive arrangement for the probe includes at least one conductive metallic drive band connected to the probe and to a driving source for moving the probe along the path past the work positions. A detector is then coupled to the drive band to detect the electrical signals carried thereby from the probe.

Abstract: In a method and apparatus for the two-way transmission of pulses between a plurality of out-stations generally connected to a common power supply network and at least one control unit, the data is applied to the power supply network using pulse code modulation so that the power supply network serves as a data bus bar between the out-stations and the control unit. A multiplexing of the data applied to the network permits individual communication between an out-station and the control unit during an assigned time slot with the power supply frequency being used for synchronizing the timing of the multiplex system.

Abstract: A method of, and apparatus for, measuring irregularities in the cross-section of yarns, rovings, bands and the like, by means of a preferably portable measuring apparatus or device providing a direct read-out or display and containing a measuring element, amplifying- and signal converting circuitry as well as an indicator or display device. A measuring signal derived from a yarn irregularity signal is checked with respect to the number of times it passes through at least one given reference value or hysteresis range, and the indicated value for the irregularity constitutes a statistically certain or significant value whenever the number of passes through the reference value or hysteresis range has reached at least a predetermined value.

Abstract: A cutting arrangement for a filament monitoring system for use in a draw-twister and the like comprises a gripping member, a cutting member and an intermediate filament guide, all of which are mounted on a spring actuated slide. Actuation of the slide causes the gripping member and cutting member to grip and cut the filament, the filament guide maintaining the filament in proper position.

Abstract: A plurality of combing machine slivers having periodically variable densities are combined in such a way that the density variations approximately compensate one another and a complete sliver having little density variation is formed. The relative phase positions of the respective combing machine slivers when assembled together are controlled in response to the periodicity of the complete sliver.

Abstract: A method and apparatus for determining the moisture content of different kinds of materials wherein electrodes having a voltage supplied thereto are applied to the material to be tested for providing a measuring current corresponding to the moisture content of the material. The measuring current is applied to an amplifier having a low-valued input resistance and the moisture content is determined by adjusting a scale graduated in moisture values in accordance with the output of the amplifier. A balancing device is provided for balancing the output of the amplifier and the scale is connected to the balancing device to indicate a balance position as the moisture content value. The amplifier is also provided with a device for converting the measuring current to a voltage corresponding to the logarithm of change in current and a device for providing temperature compensation.

Abstract: This invention relates to the art of quality control, more particularly to the regulation of electronically operated quality control equipment such as yarn cleaners, or the like so that the quality control equipment may be selectively adjusted to eliminate faults of a given magnitude only when they occur over an undesired period.

Abstract: A cell for the measurement of electrical conductivity of liquids by the principle of the four electrode measuring technique in which two current electrodes are spaced from one another and voltage electrodes provide a voltage tap-off. The voltage electrodes include at least two voltage electrodes associated with each current electrode and electrically connected in parallel. The at least two voltage electrodes are disposed along an equipotential line around a current electrode at positions on the equipotential line which exhibit low current density.

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 method for regulating the operation of yarn clearers having error correcting means such as yarn cutters, and sensing means providing an electrical signal representative of the controlled quality. The method comprises the steps of: feeding the signal from the sensing means to two independent electrical circuit channels each having separate threshold switch means, the threshold switch means of one circuit responsive to signals corresponding to yarn faults of given magnitude. The threshold switch means of the other circuit responds to signals corresponding to faults of given duration. Thereafter, an independent control signal is obtained from each of said channels for initiating the operation of the cutters when a limiting value selected for each of said two channels is exceeded.

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: In order to compensate the combing periods in density fluctuation machine slivers, the density of each of a plurality of slivers is measured to detect the phase positions of the combing periods therein and then the relative positions of the respective slivers are adjusted to place the combing periods in each sliver out of phase with the combing periods in the other slivers before the slivers are combined. The adjustment of the phase position of the slivers is effected by varying the length of the path of the sliver between the combing machine and the point where the slivers are combined.

Abstract: A method and apparatus for transporting yarns, especially filaments, through measuring units provides for driving the yarn from a yarn supply to a measuring point by means of delivery rollers disposed upstream of the measuring point in the direction of travel of the yarn and pulling on the yarn downstream of the measuring point to apply a predetermined amount of tension to the yarn, the pulling of the yarn being effected by a nozzle acting in the manner of an injector producing an airstream entraining the yarn so as to pull and also selectively rotate the yarn to apply a twist thereto.