Apparatus for regulating the speed of a member delivering or winding a yarn
US4327873A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1979 |
| Grant date | May 4, 1982 |
| Priority date | — |
| Expiry date | Jun 7, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/09
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The yarn is formed into a loop and a loop sensor monitors the variations in length in the loop of yarn. The variations in the size of the loop result from a difference in the speed between the speed of the yarn and the speed of the draw-off or delivery member. The draw-off or delivery member is driven by an asynchronous motor having a slip-clutch drive with an assembly for braking in response to eddy currents. In particular, a disc is connected to the motor and a magnetic field is applied to the disc, the magnitude of the field which is applied to the disc directly dependent upon the size of the loop. In the preferred embodiment, the regulation of the speed of a pilot roller of a winder as a function of the delivery speed of the yarn is accomplished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.