The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1994
Filed:
Sep. 04, 1992
Robert Hartel, Aachen, DE;
Karl-Josef Hoehne, Cologne, DE;
Ferdinand-Josef Hermanns, Erkelenz, DE;
Herbert Henze, Moenchengladbach, DE;
Herbert Knors, Moenchengladbach, DE;
Dietmar Engelhardt, Moenchengladbach, DE;
Wilhelm Zitzen, Moenchengladbach, DE;
Manfred Veyes, Moenchengladbach, DE;
Herbert Merkens, Erkelenz, DE;
Wolfram Weissenfels, Moenchangladbach, DE;
Hermann Ruetten, Viersen, DE;
Dirk Jaegers, Moenchengladbach, DE;
Berndt Pommer, Moenchangladbach, DE;
W. Schlafhorst AG & Co., Moenchengladbach, DE;
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.