US3569638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker having plastic diaphragm with compliance grooves
Assignee: ELECTRONIC RES ASS
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Filing: 1967-06-22
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Granted: 1971-03-09
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Expires: 1987-06-22
Abstract
Abstract Sound reproducing equipment comprising a frame having a diaphragm supported at its peripheral edges by said frame. The frame and diaphragm are preferably formed of materials having acoustically compatible properties and the diaphragm is also preferably mounted on the frame in a manner to permit movement of the diaphragm as a complete entity at low frequencies. At the same time the diaphragm is provided with compliance grooves or corrugations containing a compliant material serving to reduce or eliminate ''''break-up'''' or the development of nodal points within the diaphragm. The diaphragm further may be provided with a high frequency propagator which cooperates with the diaphragm to increase the range of the vibrations produced by the equipment without introducing feedback or distortional characteristics during operation.
Inventors
- 👤 Herbert Schoengold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/04; H04R7/12; H04R7/16; H04R7/18; H04R7/20; H04R9/00; H04R9/02; H04R9/04; H04R9/045; H04R9/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
Sound reproducing equipment embodying a diaphragm having a voice coil form carried thereby and located adjacent the center of the diaphragm, compliance grooves in said diaphragm surrounding said voice coil form and spaced therefrom to provide zones of different frequency resonance, and yieldably elastic material located in at least a portion of said compliance grooves between said zones of the diaphragm.
Claim 2
Dependent Claim
61 words
Sound reproducing equipment embodying a diaphragm having a voice coil form carried thereby and located adjacent the center of the diaphragm, compliance grooves in said diaphragm surrounding said voice coil form and spaced therefrom to provide zones of different frequency resonance, and yieldably elastic material located in at least a portion of said compliance grooves between said zones of the diaphragm.
Claim 3
Dependent Claim
18 words
Sound reproducing equipment as defined in claim 1, wherein said diaphragm is formed of stiff cellular plastic material.
Claim 4
Dependent Claim
16 words
Sound reproducing equipment as defined in claim 1, wherein said diaphragm is formed of expanded polystyrene.
Claim 5
Dependent Claim
54 words
Sound reproducing equipment as defined in claim 1, wherein said diaphragm is supported adjacent its edges by a frame having inwardly facing ledges engaged by the edges of the diaphragm, there being air channels in said ledges at spaced points about said frame and between said frame and the adjacent surface of said diaphragm.
Claim 6
Dependent Claim
117 words
Sound reproducing equipment embodying a substantially flat diaphragm and a frame, said diaphragm being formed of molded cellular polystyrene and having a voice coil form secured to the diaphragm adjacent the center of the diaphragm, a plurality of compliance grooves formed in opposite faces of said diaphragm and spaced from said voice coil form, said compliance grooves being spaced unequal distances from said voice coil form and at least a portion of said compliance grooves having yieldable elastic material therein substantially filling said grooves, said frame having an inwardly facing ledge thereon engaged by the marginal portions of said diaphragm, air channels formed in said ledges adjacent said diaphragm, and means securing said diaphragm to said frame.
Claim 7
Dependent Claim
117 words
Sound reproducing equipment embodying a substantially flat diaphragm and a frame, said diaphragm being formed of molded cellular polystyrene and having a voice coil form secured to the diaphragm adjacent the center of the diaphragm, a plurality of compliance grooves formed in opposite faces of said diaphragm and spaced from said voice coil form, said compliance grooves being spaced unequal distances from said voice coil form and at least a portion of said compliance grooves having yieldable elastic material therein substantially filling said grooves, said frame having an inwardly facing ledge thereon engaged by the marginal portions of said diaphragm, air channels formed in said ledges adjacent said diaphragm, and means securing said diaphragm to said frame.
Claim 8
Dependent Claim
89 words
Sound reproducing equipment embodying a diaphragm formed of stiff, light weight, cellular material, a voice coil form secured to said diaphragm adjacent the center of the diaphragm, a voice coil on said voice coil form, and electrical leads connected to said voice coil and extending to points adjacent the edge of the diaphragm, said electrical leads being secured to said diaphragm throughout the major portion of the length thereof, and located in grooves in one face of the diaphragm and held in place in said grooves by elastic material.
Claim 9
Dependent Claim
89 words
Sound reproducing equipment embodying a diaphragm formed of stiff, light weight, cellular material, a voice coil form secured to said diaphragm adjacent the center of the diaphragm, a voice coil on said voice coil form, and electrical leads connected to said voice coil and extending to points adjacent the edge of the diaphragm, said electrical leads being secured to said diaphragm throughout the major portion of the length thereof, and located in grooves in one face of the diaphragm and held in place in said grooves by elastic material.
Claim 10
Dependent Claim
24 words
Sound reproducing equipment as defined in claim 5, wherein the means for securing the diaphragm to the frame consists of a silicone rubber composition.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |