Boots – shoes – and leggings
Patent
1990-10-11
1993-07-06
Teska, Kevin J.
Boots, shoes, and leggings
361146, 364480, 36457103, G06F 1520, H01H 4700
Patent
active
052259994
ABSTRACT:
A system and method for neutralizing magnetic instabilities in an environment of a magnetically sensitive instrument without opposing the operation of the instrument is disclosed. A magnetometer is employed to detect the magnetic instabilities in the environment and provide signals indicative thereof to a feedback circuit. The feedback circuit drives a helmholtz coil that surrounds the instrument to produce a primary magnetic field that compensates for the detected magnetic instabilities. A microprocessor provides an offset value that is used to drive a solenoid located at the magnetometer probe to produce an offsetting field that cancels the effects of secondary magnetic fields produced by the instrument.
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Teska Kevin J.
The Trustees of the University of Pennsylvania
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