Shorting ring fixture for electromagnetic transducer
US7227970B2 · kind B2 · utility
5Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2004 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Nov 23, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electromagnetic transducer such as an audio speaker, having a motor structure in which a shorting ring that sinks eddy currents also serves as a permanent fixture to provide coaxial alignment of two or more components within the transducer. These components could include various combinations of the yoke, the top plate, the magnet, and/or other parts. Ideally, the shorting ring extends axially as close as possible to the voice coil, to a position immediately adjacent the magnetic air gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.