Apparatus for eliminating trapping of magnetic flux from an object
US5164696A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Mar 8, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/20
Abstract
A magnetic shielding apparatus for eliminating magnetic flux from an object comprises a first superconductor wall provided at one side of the object and a second superconductor wall provided at the other, opposing side of the object and so as to intersect with the interlinking magnetic flux passing through the object. The first and second superconductor walls experience a transition from a normal conduction state to a superconduction state upon cooling below a critical temperature, and each of the first and second superconductor walls has first and second movable members movable in a direction perpendicular to the magnetic flux between a first position in which the first and second movable members conceal the object and a second position in which the first and second movable members form an aperture that exposes the object. Further, there is provided a driving mechanism connected mechanically to the first and second movable members of the first and second superconductor walls for moving the same between the first and second positions, and a cooling head connected to each of the first and second movable members of the first and second superconductor walls for cooling the same below …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.