Electromagnetic motor
US4571516A · kind A · utility
8Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1981 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Jan 29, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The motor comprises a stator formed in one piece and having an opening formed therein, a yoke of high magnetic permeability and a coil wound round the yoke. The rotor comprises a shaft and a bar magnet. The opening has a first part all points of which are disposed at a first distance from the rotation axis of the rotor and a second part the points of which are disposed at second distances, different from the first distance, from that rotation axis. The invention is applicable particularly to stepping motors having a low consumption of electric current, e.g. for time pieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.