Method and apparatus for forming magnetized zones on a magnetizable body
US5025240A · kind A · utility
15Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1989 |
| Grant date | Jun 18, 1991 |
| Priority date | — |
| Expiry date | Aug 30, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F13/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The apparatus is used to make a magnet with a plurality of magnetic pole pairs. One or more pole pairs is formed by the apparatus as an initial step. Thereafter, additional pole pairs are formed by moving the apparatus with respect to the body to be magnetized or moving the body to be magnetized with respect to the apparatus. The apparatus is constructed so that previously magnetized portions of the magnetizable body are not demagnetized or significantly altered by the magnetization of adjacent parts of the magnetizable body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.