Patent ID: 7046521

Claim:
Apparatus for housing electrically powered components, said apparatus comprising: a grounded shell having a plurality of exterior wall portions and housing the electrically powered components therein, said shell fabricated from electrically conductive material and constructed such that, upon application of an externally generated electrical current thereto, said grounded shell establishes at least one eddy current to repel externally occurring magnetic fields from affecting the electrically powered components within the shell; a magnetic field enclosure having a common exterior wall portion with said shell and being attached thereto; magnetic shield plate material lining only said common exterior wall portion; and at least one power supply cable entering said magnetic field enclosure and extending through said common exterior wall portion and said magnetic shield material such that power entering said grounded shell on said power supply cables passing through said common exterior wall portion and said magnetic shield material thereon establishes at least one additional eddy current in said magnetic field enclosure to prevent other magnetic fields entering said magnetic field enclosure from affecting the electrically powered components within the grounded shell.