Multiple armature permanent magnet motor/actuator for sewing machine drive and stitch control
US4143606A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1977 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Sep 12, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This disclosure relates to electric motor/actuators and in particular to an electric motor/actuator for driving a sewing machine and operating sewing machine controls regulating, for instance, the position coordinates of the resulting stitches formed by the sewing machine. The electric motor includes multiple non-magnetic armatures having commutated windings rotatable in a single air gap formed between opposing permanent magnets having their opposed polarized poles facing said armatures and wherein individual ones of said armatures are capable of different output functions free of significant interaction with others of said armatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.