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:
Nov. 19, 1985
Filed:
Sep. 07, 1984
Geoffrey K Collett, Glenfield, GB;
Christopher B Martin-Jones, Birstall, GB;
Peter N Tapner, Twickenham, GB;
David J Commander, Milton Keynes, GB;
Mark S Gilbey, Edgware, GB;
Robert S Berks, Milton Keynes, GB;
USM Corporation, Farmington, CT (US);
Abstract
A lockstitch sewing machine has, in addition to stitch forming instrumentalities (22, 24), a needle thread control arrangement (32) by which the tension in the needle thread (T2) is controlled during stitch formation. In addition, said arrangement (32) ensures that each formed stitch is drawn into the body of the workpiece, by pulling on the thread while it remains clamped by thread clamping means (200, 202). This pulling takes place in the early stages of the formation of the next stitch so that, at the end of the machine stitching cycle, the final stitch is not set by this arrangement (32). Instead, electrically actuated stitch setting means (220 to 226) is provided operable in response to an 'end of cycle' signal supplied by control means by which further 'end of cycle' functions (e.g. release of a presser foot (36) and of the thread clamping means (200, 202) are also controlled.