Apparatus to measure yarn tension
US4393725A · kind A · utility
14Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1981 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Feb 23, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus to cause a running length of yarn to vibrate at its harmonic frequency and to electronically measure the harmonic frequency thereof to provide a signal which can be employed to maintain and/or correct the parameters of the system to maintain a desired tension in the yarn being run.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.