US4198550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peripherally reinforced laminated loudspeaker diaphragm
Assignee: Sony Corp
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Filing: 1978-11-27
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Granted: 1980-04-15
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Expires: 1998-11-27
Abstract
Abstract A diaphragm for a loudspeaker includes first and second sheet members between which a core member is sandwiched and secured so that the core member has peripheral edge portions extending between the edges of the sheet members and at which the core member is of relatively low strength. A strip-like edging member, preferably of a thermosetting resin, is secured to the peripheral edge portions of the core member and to the edges of the sheet members for increasing the rigidity of the diaphragm at its periphery and preventing unwanted vibrations thereat. A damper member may be secured to the diaphragm adjacent the edging member for movably securing the diaphragm to a loudspeaker frame.
Inventors
- 👤 Atsushi Matsuda
- 👤 Jun Kishigami
- 👤 Masaaki Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:40
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/04; H04R7/06; H04R7/10; H04R7/16; H04R7/18; H04R7/20; H04R9/00; H04R9/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
85 words
A diaphragm for a loudspeaker comprising: first and second sheet members; a core member sandwiched between said sheet members and secured thereto, said core member having peripheral edge portions extending between edges of said sheet members and at which said core member is of relatively low strength; and a strip-like edging member secured to said peripheral edge portions of the core member and to said edges of the sheet members for increasing the rigidity of the diaphragm at its periphery and preventing unwanted vibrations thereat.
Claim 2
Dependent Claim
85 words
A diaphragm for a loudspeaker comprising: first and second sheet members; a core member sandwiched between said sheet members and secured thereto, said core member having peripheral edge portions extending between edges of said sheet members and at which said core member is of relatively low strength; and a strip-like edging member secured to said peripheral edge portions of the core member and to said edges of the sheet members for increasing the rigidity of the diaphragm at its periphery and preventing unwanted vibrations thereat.
Claim 3
Dependent Claim
18 words
A diaphragm according to claim 1; wherein said core member is in the form of a honeycomb structure.
Claim 4
Dependent Claim
16 words
A diaphragm according to claim 1; wherein said core member is of a styrene foam material.
Claim 5
Dependent Claim
14 words
A diaphragm according to claim 1; wherein said sheet members are of planar configuration.
Claim 6
Dependent Claim
14 words
A diaphragm according to claim 1; wherein said sheet members are of frusto-conical configuration.
Claim 7
Dependent Claim
29 words
A diaphragm according to claim 1; wherein a damper member for movably securing said diaphragm to a loudspeaker frame is secured to the diaphragm adjacent said strip-like edging member.
Claim 8
Dependent Claim
17 words
A diaphragm according to claim 1; wherein said strip-like edging member is of a thermosetting resin material.
Claim 9
Dependent Claim
97 words
In a loudspeaker which comprises a loudspeaker frame, a diaphragm movably secured to said frame and including first and second sheet members and a core member sandwiched between said sheet members and secured thereto, and means for vibrating said diaphragm in accordance with a varying electrical signal supplied thereto; the improvement comprising, as a part of said diaphragm, a strip-like edging member secured to edges of said sheet members and to peripheral edge portions of said core member extending between said edges for increasing the rigidity of the diaphragm at its periphery and preventing unwanted vibrations thereat.
Claim 10
Dependent Claim
97 words
In a loudspeaker which comprises a loudspeaker frame, a diaphragm movably secured to said frame and including first and second sheet members and a core member sandwiched between said sheet members and secured thereto, and means for vibrating said diaphragm in accordance with a varying electrical signal supplied thereto; the improvement comprising, as a part of said diaphragm, a strip-like edging member secured to edges of said sheet members and to peripheral edge portions of said core member extending between said edges for increasing the rigidity of the diaphragm at its periphery and preventing unwanted vibrations thereat.
Claim 11
Dependent Claim
18 words
A loudspeaker according to claim 8; including a damper member for movably securing said diaphragm to said frame.
Claim 12
Dependent Claim
43 words
A loudspeaker according to claim 9; wherein said damper member includes a first section adapted to be secured to a frame, a second section adapted to be secured to said diaphragm, and a flexible connecting section extending between said first and second sections.
Claim 13
Dependent Claim
106 words
A loudspeaker according to claim 10; including damper securing means for securing said damper member to said frame, said damper securing means including a pressure member having a first portion adapted to be supported by said frame; a second portion adapted to press said first section of said damper member against said frame and a connecting portion extending between said first and second portions of the pressure member, and screw means engageable with said connecting portion of the pressure member and threadably engaging said frame for causing said second portion of the pressure member to clamp said first section of the damper member against said frame.
References Cited (Backward Citations)
US3111187A
Cited
US4122314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |