Method and apparatus for detecting an aberrational stitch in real time
US5606926A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Sep 22, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B69/36
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for detecting an aberrational stitch, normally a skipped stitch, in real time in a sewing apparatus. Movement of thread is detected, and a signal is generated if the thread is moving. At the same time, revolution of the handwheel of the sewing machine is detected, and pulses representative of the revolution are generated. The pulses are accumulated so long as the thread is moving, and the accumulated pulses are compared with a minimum number of pulses for a period of time. After one revolution of the sewing machine handwheel, representative of one stitch, the results of the comparisons are used to determine an aberrational stitch, and if a malformed stitch is detected., the sewing apparatus is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.