Basting stitch overthrow system
US4327654A · kind A · utility
2Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1981 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Mar 2, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B81/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A linear motor is used to jog the needle bar and gate beyond the normal jogging range in order to disable a latch and separate the needle bar from the sewing machine driving means. The linear motor is driven into this abnormal excursion beyond the usual jogging motion by supplying a known needle position signal to the servoamplifier system for the linear motor and providing a separate voltage from a regulated voltage source which is summed with the specific signal in order to provide sufficient electromotive force for jogging the sewing needle beyond the normal jogging range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.