Contour tracing sewing machine
US4072114A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Feb 7, 1978 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
This invention relates to a contour tracing sewing machine for forming a line of seam on a workpiece in conformity with a contour of a stitching templet of a desired shape. The tracing device used in the contour tracing sewing machine comprises a light source for emitting light towards the stitching templet, and a light sensing head consisting of a plurality of optical fibers arranged in an annular form for transmitting the light radiated on the stitching templet to a plurality of photoelectric cells. The tracing device further comprises a device for selecting a predetermined tracing direction according to electric signals produced from the plurality of photoelectric cells, so that the stitching templet and the workpiece may be shifted relatively to the light source and the sensing head by a drive device of an open-loop type in the tracing direction thus selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.