Apparatus for sensing yarn movement and for signaling breakage of the yarn
US5206709A · kind A · utility
3Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Sep 23, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Yarn is guided along a linear path through a light beam which is directed toward a photoelectric detector. Non-uniformities in the surface texture of the yarn cause the intensity of the light received by the detector to fluctuate rapidly as long as the yarn is moving. If the yarn stops moving as a result of breakage, the intensity of the light remains constant, and the detector produces an electrical signal indicative of the breakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.