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:
May. 26, 2009
Filed:
Jul. 20, 2007
Gerard Durville, Gipf-Oberfrick, CH;
Niklaus Wacker, Steckborn, CH;
Gerard Durville, Gipf-Oberfrick, CH;
Niklaus Wacker, Steckborn, CH;
Bernina International AG, Steckborn, CH;
Abstract
A monitoring device () for monitoring the needle thread () on a sewing machine () is provided which includes a regulator spring () with at least one cam switch () being connected thereto in a rotational manner. In case of changing thread tension and/or thread consumption the cam switch () and/or the detection zones () embodied thereat passes through a sensor () with two sensor areas (a, b). Here, not only the presence and absence of the cam switch () can be detected but also a direction of motion and the speed of motion. From these measurements conclusions can be drawn on various parameters of the needle thread ().