Spring system for push-button control in a sewing machine
US4612821A · kind A · utility
0Cited by
11References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 28, 1983 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Jan 28, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20244
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A push-button control for a sewing machine is provided with a spring system which returns slidable push-buttons from actuated to unactuated positions, and includes individual wire springs supported within grooves in a fixed member and preloaded against extended portions of the buttons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.