US4797935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker system with independently supported top plate
Assignee: Pioneer Corp
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Filing: 1987-02-24
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Granted: 1989-01-10
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Expires: 2007-02-24
Abstract
Abstract A speaker system in which a top piece supporting both the magnetic circuit of a speaker and the rear of the vibration plate is connected to a part of the speaker cabinet other than the baffle board at the front of the speaker. Also, an elastic damper is placed between the front of the vibration plate and the baffle board.
Inventors
- 👤 Fujio Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:16
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2869; H04R1/2892; H04R1/2896
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
A speaker system, comprising: a cabinet having a baffle board facing a principal sound propagation direction and other wall members; a voice coil passing a sound current therethrough; a vibration plate to which said voice coil is attached; a magnetic circuit interacting with said voice coil and including a top plate supporting said magnetic circuit and extending away from said magnetic circuit and connected to at least one of said other wall members but not to said baffle board; a frame for supporting said vibration plate, said frame being fixed to said top plate; and an elastic member disposed between said baffle board and said frame.
Claim 2
Dependent Claim
106 words
A speaker system, comprising: a cabinet having a baffle board facing a principal sound propagation direction and other wall members; a voice coil passing a sound current therethrough; a vibration plate to which said voice coil is attached; a magnetic circuit interacting with said voice coil and including a top plate supporting said magnetic circuit and extending away from said magnetic circuit and connected to at least one of said other wall members but not to said baffle board; a frame for supporting said vibration plate, said frame being fixed to said top plate; and an elastic member disposed between said baffle board and said frame.
Claim 3
Dependent Claim
25 words
A speaker system as recited in claim 1, wherein said top plate is connected to a non-magnetic member connected to said one other wall member.
Claim 4
Dependent Claim
25 words
A speaker system as recited in claim 2, wherein said at least one other wall member faces a direction other than said principal propagation direction.
Claim 5
Dependent Claim
24 words
A speaker system as recited in claim 1, wherein said frame and said baffle board are fixed to one another through said elastic member.
References Cited (Backward Citations)
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Cited
US2838607A
Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |