Buttonhole presser device for sewing machines
US4409913A · kind A · utility
6Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1982 |
| Grant date | Oct 18, 1983 |
| Priority date | — |
| Expiry date | Aug 25, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B3/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A buttonhole presser device includes electrical switch contact members which cooperate with adjustable contact closing members to close an electrical circuit path. The switch contact members are carried by the shank of the presser device and are arranged so that when the presser device is installed on the presser bar one of the switch contact members is in electrical contact with the presser bar and the other switch contact member is in electrical contact with a conductor. The presser bar and the conductor are electrically connected to an electrical control circuit within the sewing machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.