Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2008-07-15
2008-07-15
Ensey, Brian (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S412000
Reexamination Certificate
active
07400740
ABSTRACT:
A core cap or top plate for use with loudspeakers that includes offset adhesive control grooves on the opposite faces of the disk-like core cap is disclosed. The grooves are offset from one another by a distance that makes the smallest dimension between any feature of the grooves about the same as the nominal thickness of the core cap. The core cap increases the magnetic flux capacity over prior art core cap designs, while maintaining features advantageous to error-proof the orientation of the core cap in the loudspeaker.
REFERENCES:
patent: 7079665 (2006-07-01), Shimomura et al.
patent: 7149322 (2006-12-01), Kuribayashi et al.
patent: 7224817 (2007-05-01), Kosuda
patent: 2001339790 (2001-12-01), None
Fenwick Ronald E.
Hutt Steven W.
Steere John F.
Brinks Hofer Gilson & Lione
Ensey Brian
Harman International Industries, Inc.
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