Continuous A.C. tension control
US4449356A · kind A · utility
1Cited by
32References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Nov 10, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/31
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A direct current electromagnetic disc type tension control which has alternating current superimposed on the direct current circuit to allow the electromagnet to vibrate the tension discs in order to break the contact between the tension discs to lower the resistance to rotation of the discs by the yarn passing therethrough. The direct current circuit includes a source of high voltage and a source of low voltage and the current from the low direct current voltage source is cut off periodically and momentarily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.