Permanent magnetic structure
US5623241A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Apr 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A permanent magnet structure includes a generally shaped frame made of a magnetic material and a pair of opposite polarity magnet members mounted on the opposed surfaces of the legs of the U. The connecting element of the U which connects the legs, is disposed at a sufficient distance from the magnets so that the resulting magnetic field passes substantially entirely between the magnets and through the arms and so that no substantial eddy currents are induced in the connecting element during imaging. Between the connecting element and the magnets, there is disposed a non-conductive, non-magnetic separating member which contacts the two arms and tends to keep them apart. The separating member is so positioned relative to the connecting member and the magnets that effects of the force between the two magnets and the force produced by the magnetic field passing through the arms and connecting element are counterbalanced. This results in a structure which is mechanically stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.