Sewing machine motor speed limiting by pattern selection
US4164192A · kind A · utility
5Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1978 |
| Grant date | Aug 14, 1979 |
| Priority date | — |
| Expiry date | Nov 30, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/93
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A circuit which limits the maximum permissible speed of a sewing machine motor when specific stitch patterns are selected. Electronic signals from a means for sensing the selected stitch pattern are analyzed by the circuit to control the operation of a relay which connects a resistance in series with the sewing machine motor to reduce the maximum speed at which the drive motor may be operated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.