Method of obtaining a thread running signal
US5164710A · kind A · utility
11Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1992 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Apr 10, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a method of obtaining a thread tension signal a sensor in the form of a piezofoil is attached to a thread guide or to its mounting and delivers a signal which reflects, amongst other things, the oscillations induced in the thread guide by the thread movement. In order to obtain a signal which corresponds to the thread tension either the frequency of an element which winds up the thread and/or harmonics of this frequency is filtered out of the sensor signal and the level of this frequency or the level of these frequencies is measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.