Abstract: Method and a device in a drive system for a DC-motor including an inverter and a multiple phase synchronous motor with a permanent magnet rotor, and provided with a rotor position detection means in order to generate a rotation dependent logical position signal or signals. An optimization is carried out, which is based on the rotation dependent logical signals (POS1, POS2, POS3) from said rotor position detection means whereby the commutation points each are displaced such, that at said optimization minimum input current is detected to eliminate poor operation caused by unsymmetries in the motor iron or windings as well as unsymmetries of the rotor magnet and thereby optimize motor performance with respect to e.g. efficiency at present velocity and load, maximum acceleration and motor vibrations.

Abstract: The invention to a yarn tension sensor, in particular for yarns traveling at high speed, to accurately ascertain even short-term yarn tension fluctuations. According to the invention, a yarn guide element is mounted on one head end of a plunger coil disposed in a magnetic field. A position sensor is disposed in the region of the plunger coil and detects even minimal changes in position of the plunger coil. These changes in position are reported to a controller, at whose output variations in current are generated and supplied to the winding of the plunger coil, the variations being such to compensate for the axial force generated by the yarn and acting upon the plunger coil, thereby making the plunger coil virtually motionless.

Abstract: A multistation automatic textile machine, such as a multi-position winder or spinning machine, having a passageway formed through the machine's end frame structure for accommodating a transport conveyor or other transport path for spinning bobbins and other strand-supporting tubes.

Abstract: The present invention provides an apparatus for use in classifying yarn package carrying tubes according to the amount of yarn, if any, thereon. The classifying apparatus includes a device for detecting the presence of yarn on a tube beyond a predetermined radial spacing from the axis of the tube. A device axially moves the detecting device relative to the tube during yarn detecting operation. A signal providing device is operatively connected to the detecting device for providing a signal in response to the commencement, the cessation, or the absence of detection of yarn by the detecting device. The signal providing device can also provide a signal to indicate both the commencement and the cessation of yarn detection. A device determines the axial location of the detecting device relative to the tube.

Abstract: The invention relates to a method for operating an automatic bobbin winding machine, having a cop and tube transport system with a plurality of transport loops, which method makes the transport system usable for batch changing as well. According to the invention, when a batch of cops from a spinning machine runs out, i.e. when no further new cops are being delivered to the winding machine, the unwound tubes are carried in circulation in the transport system of the winding machine.

Abstract: A can distribution apparatus includes an assembly forming an endless path interconnecting a plurality of distribution locations for support movement of cans to and between distribution locations and an assembly for simultaneously advancing cans of varying degrees of fullness and readiness to a textile machine. The can distribution locations include a textile machine delivery location, a can return location, a full can supply location, and a can receipt location. The advancement of each can is effected simultaneous with the advancement of the other cans in the endless path independent of whether the can is empty, partially loaded or contains a full load and whether the full load is prepared for delivery or not. A detector detects the sliver fullness of each can on the endless path and signals this information to a control device which controls the distribution of cans to the various can distribution locations.

Abstract: A winding machine has winding stations and a transport path for leading cops to the winding stations. An apparatus for loosening a reserve yarn winding from peripheries of the cops disposed at the transport path includes scissors having two legs being open at an onset of a yarn search. One of the legs is a yarn loosener to be placed against a cop positioned on the transport path. The cop is rotated to bring the yarn loosener under the reserve yarn winding. An actuator closes the scissors after a predetermined search period. The apparatus for loosening the reserve yarn winding may include a yarn loosener to be placed at a cop positioned on the transport path, wherein the yarn loosener has a forward edge for picking up a yarn, and a sharp cutting edge with a height being increased at increasing distances from the forward edge for cutting the yarn.

Abstract: A transport system for circulating bobbin tube support members from and to a textile winder includes conveyors for conveying bobbin tube support members from and to a textile winder, a plurality of mutually independently controllable accumulating devices disposed intermediate the conveyors for conveying tube support members from and to the textile winder, and an overflow conveyor for conveying loaded support members to the accumulating devices. A position detecting arrangement provides information to a central control device regarding the number and location of tube support members within the transport system and a series of diverting and retaining gates are provided to control the movement of tube support members within the transport system, particularly the delivery of tube support members to and from the accumulating devices depending on the demand of the winder and the speed of the bobbin loading operation.

Abstract: The present invention provides a method and apparatus for operating a textile winding machine to wind yarn packages with the capability to verify a reported yarn break situation and to respond accordingly in the event that a yarn break has not, in fact, occurred. A sensing device at a textile winding station senses the travel of a yarn therepast as the yarn is wound from a supply package onto a take-up package. In the event of a yarn break or movement of the yarn beyond the sensing range of the sensing device, the sensor reports the absence of yarn to a control unit. The control unit responds to the signal from the sensing device by stopping the yarn winding operation and implementing a yarn re-establishment operation.

Abstract: A heat sensor which detects the heat generated from sliding frictional contact with a traveling yarn in a textile machine and generates control signals therefrom for the controlling of a yarn winding operation. A temperature-sensitive electric resistor, especially a thin-layer resistor or a film thermometer, serves as the heat sensor. The heat sensor is connected e.g. via a signal converter to control devices, e.g. to a controllable yarn brake and/or to a drive motor for yarn take-up. When the measured temperature rises above a limit value, the braking force of the yarn brake can be first lowered and then the speed of the drive motor can be reduced.

Abstract: The invention relates to a caddy for the mutually independent individual transport of cops and cop tubes and provides a caddy that can be used for different tube diameters, which is achieved by forming the mandrel and base plate of the caddy from separate molded parts. The base plate can be connected securely but detachably and form-fittingly with mandrels of different dimensions for correspondingly differing diameters. The base plate has a central opening with an undercut while the mandrel has an inwardly elastically resilient arrangement of legs that fit over the undercut.

Abstract: A tube transport assembly is provided for individually transporting tubes of the type onto which yarn is wound on a textile machine. The tube transport assembly includes magnetic components for guiding and transporting the tube support members along a transport path by magnetic interaction with ferromagnetic portions of the tube support members. The magnetic components can be configured as electromagnets or as permanent magnets. The transport path includes a junction at which the tube support members can be individually branched onto a branch path and a magnetic component is positioned adjacent the junction for selectively magnetically engaging the tube support members to guide the tube support members along to selected branch paths. A vertical transport component includes magnetically active carrier members mounted on an endless belt and is operable to magnetically engage and carry the tube support members vertically.

Abstract: The present invention relates to a brake disk arrangement for a yarn tensioning device wherein at least one of a pair of opposed facing brake disks can be acted upon by a variable pressing force in the direction of the other brake disk. According to the present invention, rotary motion is transmitted from one brake disk to the other in a simple manner, without affecting the brake force, by connecting to one of the brake disks a concentric magnet that is secured against relative rotation with respect to this brake disk, and by connecting to the other brake disk a concentrically arranged body of hysteresis material which is secured against relative rotation with that brake disk. At least the brake disk that can be acted upon the variable pressing force comprises a nonmagnetic material and is changeable in position axially relative to the magnet or the hysteresis material associated with the disk. In alternate embodiments, both brake disks may be provided with a magnet.

Abstract: The present invention provides a manipulator on a sliver can transport carriage which can travel along the spinning positions of a spinning machine to enable the manipulator to take up a leading end of sliver at a defined position on a sliver container and guide the sliver end to a sliver supply location of a spinning position.

Abstract: A textile machine transport apparatus is provided for transporting tube support members to and between locations at which yarn packages supported on the tube support members are handled. The transport apparatus includes an assembly for advancing the tube support members along a delivery path. The advancing assembly is reversibly drivable in a forward direction and in a reverse direction opposite to the forward direction to provide the capability to, for example, reverse the advancing movement of some of the tube support members or to advance other tube support members in a different advancing direction. The transport apparatus also includes a device extending laterally relative to the delivery path of the tube support members for engaging a tube support member to prevent further upstream movement thereof. The laterally extending device may be in the form of a stop guide extending into the path of the tube support members as they are transported in an upstream direction.

Abstract: A yarn end preparing apparatus is provided for drawing off a yarn end of a textile yarn package and thereafter rewinding the drawn out yarn end onto the yarn package at a preferred location thereon. The yarn preparing apparatus includes a suction housing supported on a pair of vertical guide rods for movement parallel to the axis of a yarn package to be prepared. A pair of linkage members, each comprising a conduit, are pivotably connected to one another with their respective conduits communicated with one another for applying suction through the conduits to the suction housing to thereby effect drawing in of a yarn end through a suction slot of the suction housing. A light beam emitting member is mounted forwardly of the suction slot for emitting a light beam detected by a light beam detecting member mounted on an opposite forward side of the suction slot.

Abstract: A yarn end loosening apparatus is provided for performing yarn end loosening operations on yarn packages. The yarn end loosening apparatus includes a chamber for directing streams of air relative to a yarn package disposed within the chamber to effect loosening of a yarn end from the yarn package. Additionally, the yarn end loosening apparatus includes an assembly for introducing air streams from, respectively, a taller package jet nozzle and a shorter package jet nozzle, the jet nozzles being spaced from one another to each direct a stream of air at the axial location of a type of yarn package having a predetermined axial length. Additionally, the yarn end loosening apparatus includes a device for selectively controlling the supply of air through the taller and shorter package jet nozzles such that only a selected one of the jet nozzles directs air into the chamber during a yarn end loosening operation.

Abstract: An apparatus removes textile articles such as empty tubes or full yarn packages from the individual posts on which such articles are supported simultaneous with advancing movement of the posts. The textile articles are removed in a direction generally parallel to the axis of the posts so that during removal detrimental binding of the textile article relative to the post does not occur. According to one aspect of the invention, at least one pair of endless belts are mounted in spaced, parallel relation to one another to form an elongate opening therebetween. The elongate opening is aligned with the travel path of the textile articles being advanced on the posts so that the textile articles automatically enter the elongate opening and are engaged by the endless belts without the need to stop or otherwise control the advancing movement of the textile articles.

Abstract: An apparatus for doffing textile bobbin tubes from tube support members having posts projecting therefrom for supporting tubes thereon as the tube support members are conveyed along a transport path by a transport device with the tube support members being slidably supported on the transport device to allow stoppage of a tube support member as a tube is doffed without deactivating the transport device is disclosed. The tube doffing apparatus comprises a pair of opposed tube engaging and doffing devices having tube engaging surfaces which may be conveyor belts with guide and support rollers straddling the path of posts of support members traveling along the transport path and extending away from the transport path in the general direction of projection of the support member posts. These devices are disposed for engaging a tube on a post of a support member supported on the transport path and thereby stopping the support member while removing the tube from the post.

Abstract: An apparatus for delivering cops mounted upright on caddies to the winding heads of an automatic bobbin winding machine assures a sufficient supply of cops to all winding heads along the entire winding machine, even in the case of relatively short cop times, by locating infeed positions for the caddies at spacings along a distributing conveyor common to all winding heads such that a first plurality n.sub.1 of operating winding heads are located to a front side of a first infeed position, a second plurality n.sub.2 of operating winding heads are located to the opposite rear side of the last infeed position, and a third plurality k of operating winding heads are located between such infeed positions, with n.sub.1 .gtoreq.4, n.sub.2 .gtoreq.4 and k.ltoreq.n.sub.1 +n.sub.2 +3. The distributing conveyor belt is driven alternatingly in opposite directions to distribute the cop-mounted caddies.