Loudspeaker spider with regressive rolls
US6449375B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1999 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Sep 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A transducer includes a supporting frame, a motor assembly providing a magnetic field across an air gap, a coil former supporting a voice coil in the magnetic field, a diaphragm attached to the coil former and coupled by a surround at its outer perimeter to the frame, and a spider having an inner perimeter coupled to the coil former and an outer perimeter coupled to at least one of the frame and motor assembly. The spider includes a plurality of rolls. The roll next adjacent the inner perimeter may have a first height. The roll next adjacent the outer perimeter may have a second height less than the first height. The surround may include a plurality of rolls. The roll next adjacent the diaphragm may have a third height, and the roll next adjacent the frame a fourth height less than the third height.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.