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:
Sep. 08, 1992
Filed:
May. 28, 1991
Angelo Del Favero, Crescentino, IT;
ROJ Electrotex S.p.A., Biella, IT;
Abstract
An instrument for measuring the tension of yarns--particularly weft yarns which wind or unwind forming a 'balloon'--avoiding further deviations thereof, which makes use of a variable impedance, for example a differential capacitor or a variable inductor, comprising a movable component and at least one fixed component as parts of an electric measuring circuit. All the components of the instrument have a centered symmetry and a passage through their center for the yarn whose tension has to be measured, with a yarn guiding and deviating eyelet positioned in correspondence of the closing vertex of the 'balloon' and fixed to the movable component of the variable impedance. The variable voltage detected on one of the components of the impedance, as a function of the tension of the yarn sliding through the eyelet, is measured by a measuring device connected to the movable component. A weft yarn feeder for looms, having at its outlet an instrument with centered symmetry as described hereabove, positioned on the main axis of the weft feeder so as to measure the tension of the unwinding yarn being fed to the loom is also disclosed.