Magnetically shielding structure
US6486393B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/872
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
By combining magnetically shielding members of various different properties with each other, a magnetically shielding capability of a magnetically shielding structure is made to improve and a greatly reduced magnetic field, as compared to an external one, can be realized effectively. The penetrating magnetic field has a distribution, on the longitudinal axis of a cylindrical shielding body made of a material manifesting a Meissner effect, which attenuates toward the center direction of the cylindrical shielding body. Magnetic induction is generated in a cylindrical collar made of a highly permeable material. Then, the penetrating magnetic field is shorted magnetically, being absorbed by the highly permeable material. To make this possible, the cylindrical collar, made of a highly permeable material, which has an opening along the longitudinal direction of the cylindrical shielding body, is provided, leaving a space between the cylindrical shielding body made of the superconductive material manifesting the Meissner effect and itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.