Position sensing device for electronic sewing machine
US4214539A · kind A · utility
1Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1978 |
| Grant date | Jul 29, 1980 |
| Priority date | — |
| Expiry date | Sep 21, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B19/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sewing machine, wherein a stitch controlling instrumentality is positioned during operation of the machine by a motor acting through connecting linkages, is provided with a ring magnet that is connected to said linkages for angular displacement thereby about its axis and with a linear output Hall effect sensor that is disposed within the ring magnet to produce an output voltage proportional to displacement of the stitch forming instrumentality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.