Abstract: A measuring melt felder (M) has a storage body (F) for the thread (Y) wound in turns (W) and at least one stopping device (S) outwardly associated to the storage body (F) that delimits a thread (Y) passage slot (A). A stopping element (P) capable of moving transversely through the passage slot (A) to a stopping position acts as a circumferential stop (B) for the thread (Y). The stopping device (S) has, associated with the stopping element (P), an adjustable thread clamp (K) for the thread (Y) held at the stopping element (P).

Abstract: A yarn storage and feed device with a main body, a take-up element on which the yarn is wound, a storage surface for yarn storage, a threading device with a compressed-air feeder system and a device for activating direction-jet nozzles. At least one direction-jet nozzle is located between the point of entry of the yarn into the storage and feed device and the feed-out point from the yarn-winding element; this nozzle can be activated independently of the nozzles fitted downstream of the feed-out point so that in the event of a partial failure, where stored yarn remains on the storage surface, the yarn end can be blown below the feed-out point.

Abstract: A jet loom with a weft yarn insertion brake contains a braking element that is movable from a position of rest, on one side of the weft yarn, across the path of the weft yarn to a braking position. An electric motor, which drives the braking element, can be actuated during each insertion process of the loom. The electric motor preferably constitutes a fast response step or d.c. motor, whose direction of displacement can be switched and whose stroke can be individually adjusted for each set position of the braking element during the insertion process. Operation of the electric motor is controlled by an electronic control device. Programming within the control device can be modified between varying insertion processes so as to adapt the timing, stroke and driving direction of the electric motor. The driving force of the electric motor is transferred to the braking element by a constrained, inelastic link connecting the two.

Abstract: In a thread feed device for a textile machine, in particular for an air-jet weaving machine, which comprises a thread storage and feed device between a thread supply device and the picking device of the textile machine and which further comprises an assistant device arranged in the thread path extending from the thread supply device to the thread storage and feed device, the assistant device is provided with a friction drive for the thread. A method of driving a thread comprises the features that, in a friction drive constituting the assistant device, the circumferential speed of the friction drive is controlled such that it is higher or lower than the thread speed in the thread storage and feed device, and that, on the circumference of the friction drive, the thread is fed with a certain amount of slip maintained during the feed process or decelerated.

Abstract: In a sensing and analyzing system for a yarn feeder with yarn storing unit, one or more sensor elements which may be coupled to one or more circuits are used for evaluating or sensing sensor information. At least one sensor element is placed in the unit, from a yarn detection standpoint, in an uncritical relationship to the unit's yarn transporting surface and a yarn turn travelling forward on this. The transmitting members are designed to relay information from each sensor element in the unit in unprocessed or processed form to receiving members located outside the unit. Energy emitting members within the unit ensure energy supply to the sensor elements and the circuits belong thereto. When using optical emitting elements, these are included in an arrangement which supplements or alternatively substantially reduces the influence of vibrations in the unit on the sensing or analyzing result.

Abstract: In the case of an optical sensor, which is used for a thread (Y) moving approximately transversely to the longitudinal direction thereof, in particular for the thread supply (V) which consists of non-separated thread windings in a thread storage and feed device (F) having provided therein a light source (2) directed towards a predetermined passage area (P) for the thread (Y) and a receiver (3) oriented such that scattered light (6) reflected by the thread in said passage area will fall onto it, a shield element (9), (10) is arranged in the passage area (P) below the thread (Y) on the side of the thread which faces away from the light source (2), said shield element being arranged and/or constructed in such a way that it will not reflect light (4), which comes from the light source (2), to the receiver (3) and that it will not allow light, which is reflected by surfaces or objects (L) located on the other side of the shield element (9) with respect to the light source (2), to pass to the receiver (3).

Abstract: In a thread brake, which comprises at least one brake element (B) adapted to be moved relative to a counter brake element (B.sub.G), said brake elements acting on the thread in braking positions and being adapted to be displaced up to and into a threading position in which the thread can be moved undecelerated through the thread brake, and in the case of which a brake element adjustment device is provided, the threading position of the thread brake (F.sub.K, F.sub.L, F'.sub.L) can be established with the aid of a drive means (A) of said adjustment device, said thread brake having provided therein air guide surfaces (L), which, in the threading position, define an air guide passage used for automatic, pneumatic threading of the thread (Y) by means of a stream of air.

Abstract: An easily movable output brake system forms part of or cooperates with a yarn feeder (13) comprising a spatially fixed body supporting a yarn store, from which body a yarn (11) can be drawn off even at advanced speed through an output channel (10). The system comprises a first member (9) which is arranged in a bearing and which, in the functional operation of the system, by means of a surface clamps the yarn being drawn off against a counterstay member (15). The members (9, 15) are designed to effect a yarn-cleaning function dependent on the yarn rotation upon drawing-off, with simultaneous prevention of considerable accumulation of lint, particles etc., in respect of the members. The mobility of the system is obtained by the selection of the components in question.

Abstract: A thread feeding system including a thread regulator having a fixed housing, a hollow rotatable shaft extending through the fixed housing, a rotatable winding section secured to the rotatable shaft, an angled thread duct extending through the thread regulator, an inlet positioned at an upstream end of the duct, and ejectors positioned along the duct portions. The ejectors supply a working medium from a pressurized working medium source to the duct to facilitate threading of a thread through the thread duct. The inlet receives a free end of the thread from a thread spool assembly positioned upstream from the thread regulator. The feeding system also includes an arrangement for controlling the ejectors so that the ejectors generate a pressure proximate to the inlet to develop a flow of the working medium into the inlet, and an arrangement for feeding the thread through the thread regulator in a pulsating manner to insure that the free end of the thread passes unobstructed through the thread duct.

Abstract: In the case of a thread braking device (B), which is intended to be used especially on the supply side of a thread feeder (F) and which comprises a thread brake (3) having a fixed passage axis (f) and having arranged thereon a shield surface (A) provided with a thread opening (22) and arranged transversely to the direction (R) in which the thread (Y) is supplied, there are provided direction adjustment means (M) for the shield surface (A), with the aid of which the transverse position of said shield surface (A) can be adjusted to supply directions (R1, R2) of the thread (Y) deviating from the passage axis (f). Even in the case of a shield surface (A) for general thread-guiding tasks, which is arranged in a stationary holding means and oriented transversely to the supply direction (R) of the thread (Y), such position adjustment means are provided so that the transverse position of the shield surface (A) can be adjusted to the respective supply direction (R1, R2) of the thread (Y).

Abstract: A yarn tension control system incorporated into a computerized control system of a textile machine for controlling the operation of a fast responding braking or friction device. The braking or friction device is positioned along a weft yarn path and includes a functional control unit operably coupled to the computerized control system, a tension sensing arrangement for sensing the tension of a strand of weft yarn passing therethrough, and a friction force applying arrangement for applying a friction force to the strand of weft yarn in dependence upon the tension sensed by the tension sensing arrangement.

Abstract: In the case of a method of holding in position a rotatably supported thread storage surface in a thread storage and feed device, in which a group of components defining the storage surface is rotatably supported on a shaft adapted to be rotated in a housing and in which a winding-on member circulates together with the shaft, whereas magnets prevent the group of components from rotating together with the shaft, a rotational vibration damping connection is temporarily established between the housing and the group of components while the shaft is rotating In a thread storage and feed device (F), which is provided with an advance member (6) adapted to be driven such that it carries out a wobbling movement, there are arranged an externally supported rotational vibration damping member (X) and an abutment (Y) which is provided on the advance member (6).

Abstract: An electronically controlled weft yarn processing unit having a weft yarn feed system arranged separately in the vicinity of a weaving machine. The yarn feed system including at least one yarn feeder having a separate drive motor including an electronic control unit and monitoring and control elements. The yarn feed system further including a first input and indicating section connected to the electronic control unit of the yarn feeder for adjusting at least one functional parameter including a speed limit of the drive motor, a weft yarn length, a sensitivity of the monitoring and control elements, a reference value for a weft yarn store size, and a weft yarn store offset. The weft yarn processing unit also having an operation and control panel provided on a weaving machine. The first input and indicating section is located within the control and operation panel on the weaving machine.

Abstract: A yarn supply system having a plurality of feeders associated with a textile machine. Each feeder having its own speed control system including a variable speed drive motor and a variable speed controller which includes a programmable control unit which is capable of responding to the actual yarn consumption requirements and responding to a main control apparatus message. The main control apparatus including a yarn feed rate anticipating unit that represents additional intelligence to the feeders. The yarn feed rate anticipating unit becomes informed about a weaving pattern stored in the main control apparatus memory and transfers a message via a message transfer network to individual feeder programmable control units to accelerate or decelerate in advance of an actual winding-on requirement.

Abstract: Elements forming part of a textile machine are controlled and supervised with the aid of a computerized system. This comprises one or more units which serve the element and which together with other units form a network. One or more units can, if necessary, serve more than one element. Each unit is connected to a connection which forms part of the network formed by the units. Message transmission within the system takes place serially and digitally at the connection. The message transmission at the connection includes message types which are ranked from the point of view of priority, and the units and the connection are arranged to discriminate in the message transmission effected so as to guarantee a transmission time, for a finally transmitted message between units concerned, of a maximum of 2.0 ms for at least three different instantaneous signals or trigger signals which are attributable to functions in or on the textile machine.

Abstract: In an opto-electronic detector apparatus, particularly of a yarn storage and feeder apparatus, for detecting at least one yarn or yarn section moving transversely of its longitudinal direction in a detection field, said apparatus comprising a light source, a receiver surface, a photoelectric cell for generating an output signal, and an optical system, the optical system is an optical imaging system (A) having a focus depth defining a predetermined depth (T) of said detection field, and a field of vision of limited dimensions at least in the direction of its width (B), the receiver surface (16) being disposed in the vicinity of the focal plane of the optical imaging system (A), so that said imaging system (A) produced a clear image on the receiver surface (16).

Abstract: A yarn storage and feed device for textile machines, in particular for the weft yarn of a multicolor weaving machine, comprising an arrangement for limiting the length of the yarn which is unwound in sections having a predetermined length. The arrangement includes a cylindrical storage member for a yarn supply which consists of windings and from which the yarn can be unwound via one end of the cylinder. At least one stopping element is arranged at an axial distance from the last yarn winding of the yarn supply and is adapted to be moved from a passive position, in which the yarn unwound in a circulating movement passes the stopping element, to a stopping position, in which the yarn under take-off tension is stopped at the stopping element during a period of rest until the next movement of the stopping element to the passive position takes place.

Abstract: A yarn storage and feed device for textile machines, comprising a storage body defining a storage surface as well as a winding member for the yarn, the winding member and the storage member being adapted to be rotated relative to each other for transporting the yarn from a feed side of the device onto the storage surface of the storage member and for forming a yarn supply from which the yarn is removed towards the take-off side of the device, and further comprising yarn guide members, which are arranged in the yarn path from the feed area to the take-off area and which are provided with yarn guide surfaces coated with sintered ceramic material or consisting of sintered ceramic material, the yarn being deflected on the yarn guide surfaces at various angles. With regard to particularly advantageous frictional conditions, at least the yarn guide surface (L) having the largest deflection angle (180.degree.-.alpha.

Abstract: An apparatus for storing, feeding and measuring a weft yarn of a jet weaving machine is provided with an annular housing containing at least one weft yarn-stopping device. In said stopping device a stop member is arranged for a displacement between a passive position and a stop position. Said stop member is actuated by a current-energizable solenoid coil. Said stopping device is provided with a bistable and self-holding mounting arrangement for the stop member. Said stop member is connected with a polarized permanent magnet. For an actuation of the stop member in order to displace it away from its initial end position said current-energizable solenoid coil is electrically connected with a current-direction-reversing-circuit.

Abstract: In a method for controlling a yarn storage and feeding device, particularly for a mechanical loom, comprising a storage surface adapted to have windings of a yarn wound thereonto and withdrawn therefrom by a consumer, and a control unit for a winding drive mechanism operable to adjust the winding speed in accordance with the consumption rate and in response at least to the actual value of the number of yarn windings on the storage surface, for adjusting the actual value towards a predetermined desired value, the desired value is altered in response to at least one alteration of the winding speed to thereby obtain an optimum smallness of the yarn supply on the storage surface. In a yarn storage and feeding device for performing this method, the control unit cooperates with a reference value memory (18) for the supply of desired values (nV) varying in a predetermined manner.