Actual sew length measuring device
US4171575A · kind A · utility
5Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1978 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Apr 6, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2305/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The lengths of one or more fabric workpieces are measured by rolling a toothed measuring wheel over each fabric workpiece as it is passed through a sewing machine and conveying the revolutions of the measuring wheel to an electronic, digital counter by means of a torsion shaft whose flexibility is tuned such that while coacting with a friction brake at the counter, no reverse motion will occur due to relaxation in the fabric tension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.