Loudspeaker

Details Loudspeaker Loudspeaker

2005-03-15

2005-03-15

Le, Huyen (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S412000, C381S406000, C381S419000, C381S420000

Reexamination Certificate

active

06868165

ABSTRACT:
A loudspeaker has a magnetic flux assembly that has a pole piece and a plate and magnet structure for co-operating with a voice coil. The plate structure includes a top plate which is mounted adjacent to the diaphragm assembly of the loudspeaker. There is a cavity within the voice coil and between the diaphragm membrane and the top of the pole piece. A fluid flow passage is provide to permit air displaced to and from the cavity during movement of the diaphragm assembly to flow through the top plate and to encourage cooling of the assembly.

REFERENCES:
patent: 2261110 (1941-11-01), Engholm
patent: 2261111 (1941-11-01), Engholm
patent: 5042072 (1991-08-01), Button
patent: 5335287 (1994-08-01), Athanas
patent: 5357586 (1994-10-01), Nordschow
patent: 5461677 (1995-10-01), Raj
patent: 5497428 (1996-03-01), Rojas
patent: 5909015 (1999-06-01), Yamamoto et al.

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