System and method for reducing effect of magnetic fields on a magnetic transducer
US7190247B2 · kind B2 · utility
57Cited by
15References
81Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2004 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Jan 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H36/0073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic driver transducer free of torque in the presence of an external magnetic field, of any direction and orientation (such as in a Magnetic Resonance Imaging environment). The transducer includes a housing. At least one coil is associated with the housing. A plurality of magnets within the housing are aligned along an axis in an anti-parallel orientation. The magnets are free to move along an axis, wherein vibration of the magnets causes vibration of the housing. The transducer may be, for example, fixed to an ossicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.