Abstract: An apparatus for controlling the tension of a traveling yarn includes a rake tensioner having stationary and displaceable yarn tensioning elements in engagement with the traveling yarn, and an electrical coil to which electrical current is supplied by a regulating device. The displaceable yarn tensioning elements and the electrical coil are disposed on a common pivot lever. The electrical coil is pivotable in an air gap through which magnetic field lines pass. The tension of the traveling yarn is controlled as a function of the current supplied to the electrical coil. The present invention, thusly, improves the control of the tension of the traveling yarn in spinning or bobbin winding machines.

Abstract: A method for operating a cheese-producing textile machine which produces cheeses of the “random winding” type, wherein the contact pressure of the cheese on the yarn guiding cylinder is reduced and the cheese is simultaneously charged with a braking torque for preventing pattern windings. The angular velocity w of the cheese (4) is continuously determined and processed in a control device (18) such that, when or shortly prior to reaching a so-called pattern winding zone (BWZ), the angular velocity w1 determined by the diameter d1 of the cheese (4) is reduced by means of the definite adjustment of the contact pressure with which the cheese (4) rests on the yarn guiding cylinder (3), to an angular velocity w2 which lies below the angular velocity wk of a cheese of the critical diameter dk, driven without slippage, which causes pattern winding.

Abstract: A device for controlling the creel (10) of a textile machine, which creel is pivotably seated by means of a pivot shaft to support a bobbin in frictional driven contact with a drive roller, is connected with a drive element for generating torque, e.g., a stepper motor or other device displaceable in angular steps or increments. A torque transducer is arranged between the creel and the drive element to convert the displacement of the drive element into a defined torque acting on the creel.

Abstract: A device for measuring the tension of a traveling yarn, comprising two spaced-apart stationary yarn guide elements defining a yarn travel path therebetween and a measuring member disposed between the yarn guide elements and projecting into the yarn travel path to engage the yarn and react to tension changes therein. Each of the stationary guide elements has a yarn guide groove, and the movable measuring member comprises a yarn engagement body extending linearly in a direction substantially perpendicular to the yarn travel path. The yarn engagement body includes a central area with a yarn guide contour essentially convexly rounded in the direction of the yarn travel path and merging at opposite lateral ends of the central area with end areas essentially convexly rounded both in the direction of the yarn travel path and substantially perpendicular thereto.

Abstract: In order to regulate the thread tension force of a traveling thread to a predeterminable set value, a comb tensioner with stationary thread guide elements and displaceable thread guide elements is provided, wherein the displaceable thread guide elements can be displaced by means of an electrodynamic drive mechanism which has a current-force-proportional characteristic curve and whose current supply is changed by a thread tension force regulating device, whereby the comb tensioner is employed both in a function as a thread tension force sensor and in a function as a thread tensioner.

Abstract: There are dynamic sensors whose plunger is seated in the center of at least one diaphragm. In certain instances of use it is not possible to protect the sensitive diaphragms against inappropriate handling. For example, dynamic sensors are employed in the textile industry as yarn tensile force sensors. The diaphragm in which the yarn feeler is seated, which faces the yarn travel path, cannot be protected by means of a cover against unintentional touching, since dust accumulations between the cover and the diaphragm can hamper its function. For protecting the diaphragm it is therefore proposed in accordance with the invention that a support body is disposed a short distance behind the diaphragm and that the side of the support body facing the diaphragm has a support contour which is essentially matched to the contour on the side of the diaphragm facing the support body.