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. 13, 1983
Filed:
Nov. 26, 1980
Charles R Martell, Dallas, TX (US);
Elmer N Leslie, Dallas, TX (US);
Don D Isett, Dallas, TX (US);
Stephen S Treadwell, Richardson, TX (US);
Microdynamics, Inc., Dallas, TX (US);
Abstract
An adaptive semiautomatic sewing system (10) comprises a sewing machine (12), a drive unit (42) including a variable speed motor and encoder for counting stitches sewn, at least one material edge sensor (40) mounted ahead of the needle (22) of the sewing machine, and a microprocessor controller (51) coupled to the sewing machine controls. The system (10) has manual, teach and auto modes of operation. In the teach mode, control parameters for each seam are stored as the operator sews the initial piece. Accurate control of seam lengths and end points is achieved by initiating countdown of a variable number of final stitches responsive to detection of the material edges by the sensors (40). In one embodiment, a window is set up around the stitch count at which terminal countdown initiates to avoid spurious signals. In another embodiment, momentary toggles of the sensors (40) are ignored so that an even wider range of sizes can be sewn with the same taught program.