Magnetic field generating assembly
US5471140A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1994 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Nov 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An assembly which generates a magnetic field in a working volume spaced from the assembly. The assembly includes first and second magnets, each having a north and a south pole and a respective magnet axis which joins the north and south poles, the first and second magnets being positioned so that the respective magnet axes are along a main axis of the assembly and a pole of the first magnet faces a like pole of the second magnet. Third and fourth magnets, each having a north and a south pole and a respective magnet axis which joins the north and south poles, are positioned so that the respective magnet axes are substantially parallel with the main axis, wherein the position of at least one magnet of the group including the first, second, third and fourth magnets is adjustable in the direction of the main axis and the relative positions and field strengths of the first, second, third and fourth magnets are chosen to control the radial dimension and the characteristics of the magnetic field generated in the working volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.