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:
Apr. 14, 1981
Filed:
Jul. 09, 1979
Jean-Jacques Tardy, Caluire, FR;
Verdol S.A., Caluire, FR;
Abstract
In a double twist spindle device wherein the support of the supply bobbin is retained against rotation on the spindle proper by two rows of permanent magnets disposed opposite each other each side of the radial passage of the yarn issuing from the axial bore of the spindle, one of the said rows is mounted in such manner as to be displaceable through a limited extent with respect to its supporting member. If the frictional torque between the spindle and the bobbin support temporarily reaches such an excessive value that the relative angular displacement of the rows becomes equal to the pitch of the successive magnets in both rows, the repulsive magnetic forces displace the said displaceable row in such manner that the undesirable accelerating effect of the magnetic forces on the bobbin support is eliminated or at least strongly decreased and that the rows may again find a new state of equilibrium when the excessive frictional torque disappears. In an embodiment the row corresponding to the bobbin support is angularly displaceable through an angle greater than the pitch of the magnets in the rows. In another embodiment it is displaceable axially so as to momentarily increase the distance apart of both rows.