Pattern generating mechanism for sewing machine
US7677187B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2007 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Dec 6, 2028 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B3/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A button-hole earn is mounted on a pattern selection cam shaft for mounting a pattern selection cam, the pattern selection cam shaft provided independently of a pattern cam shaft provided with a needle swing cam group. The rotation of a sewing machine main shaft causes rotation of a drive gear which in turn rotates a first follower gear in engagement with the drive gear and a second follower gear engaged with the first follower gear. Thus, the rotation of the first follower gear causes rotation of the needle swing cam group whereas the rotation of the second follower gear causes rotation of the button-hole cam. Thus, a pattern selected among a plurality of patterns by a pattern selection dial is generated to form button-hole stitches selected by the pattern selection dial.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.