Electromagnetic control device for a dobby
US5029618A · kind A · utility
Inventor
Key dates
| Filing date | Jun 5, 1990 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Jun 5, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1669
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control device for textile machines, in particular dobbies, has two magnet yokes with associated permanent magnets and an electromagnet, as well as an appropriately built magnet armature held in a first or second end position by the permanent magnet flux. When a current control pulse is applied to the electromagnet, however, the armature suddenly moves to the opposite end position, where it is again held until the next current control pulse moves it to the other end position. Only a very short current pulse is necessary to make the magnet armature change position. The resulting energy impulse is very intense and allows the holding and switching mechanical elements of dobbies to be directly controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.