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. 03, 1979
Filed:
Jul. 28, 1978
John W Wurst, Dover, NJ (US);
William H Dunn, Branchville, NJ (US);
The Singer Company, New York, NY (US);
Abstract
A sewing machine is disclosed wherein the positional coordinates for successive stitch penetrations are stored in a memory having addressable locations corresponding to a plurality of operator selectable patterns, one of which is a buttonhole pattern. The buttonhole pattern includes two parallel rows of zig-zag stitches forming a pair of buttonhole side bars, the inner stitches of the side bars defining a cutting space therebetween and the outer stitches of the side bars defining the width of the buttonhole pattern. Means are provided for operator initiation of an override command to selectively alter the operation of the bight actuator to selectively control the position of only the inner side bar stitches so as to selectively vary the width of the cutting space while maintaining constant the overall buttonhole pattern width.