US4473723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon loudspeaker having corregated ribbon for reducing distortion
Assignee: Individual
•
Filing: 1982-06-04
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Granted: 1984-09-25
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Expires: 2002-06-04
Abstract
Abstract A specially designed ribbon for a ribbon loudspeaker is disclosed which prevents ribbon snaking associated with prior art corregated ribbon. The elimination of snaking enables the use of extremely small gaps between the side edges of the ribbon and the magnetic pole pieces which in turn greatly reduce transient distortion of high fidelity sound. Relatively large amplitude corregations are formed within suspended terminal ribbon portions and substantially smaller amplitude corregations are formed within the suspended centralized ribbon portion.
Inventors
- 👤 Gilbert L. Hobrough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/04; H04R9/046; H04R9/047; H04R9/048
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
86 words
In a ribbon loudspeaker having a sound radiating ribbon conductor suspended lengthwise between magnetic pole pieces, said ribbon having suspended terminal portions and a suspended centralized portion between said terminal portions, said ribbon being positioned with respect to said pole pieces so that gaps are formed between said pole pieces and the longtitudinally extending side edges of said ribbon, said ribbon having relatively large amplitude transverse corregations formed within said suspended terminal ribbon portions and relatively small amplitude transverse corregations formed within said centralized ribbon portion.
Claim 2
Dependent Claim
86 words
In a ribbon loudspeaker having a sound radiating ribbon conductor suspended lengthwise between magnetic pole pieces, said ribbon having suspended terminal portions and a suspended centralized portion between said terminal portions, said ribbon being positioned with respect to said pole pieces so that gaps are formed between said pole pieces and the longtitudinally extending side edges of said ribbon, said ribbon having relatively large amplitude transverse corregations formed within said suspended terminal ribbon portions and relatively small amplitude transverse corregations formed within said centralized ribbon portion.
Claim 3
Dependent Claim
48 words
The combination as set forth in claim 1 wherein the amplitudes of said corregations formed within said terminal portion are about 50 mils from peak to trough, and the amplitudes of said corregations formed within said centralized portion are about two to five mils from peak to trough.
Claim 4
Dependent Claim
28 words
The combination as set forth in claim 1 wherein the length of said centralized portion is about one-half to three-quarters of the entire suspended length of said ribbon.
Claim 5
Dependent Claim
28 words
The combination as set forth in claim 2 wherein the length of said centralized portion is about one-half to three-quarters of the entire suspended length of said ribbon.
Claim 6
Dependent Claim
64 words
The combination as set forth in claims 1, 2, 3 or 4 wherein said corregations formed within said terminal ribbon portions have a spacial frequency of about 10 corregations per linear inch along the length of said ribbon, and said corregations formed within said centralized ribbon portion have a spacial frequency of about 50 corregations per linear inch along the length of said ribbon.
Claim 7
Dependent Claim
34 words
The combination as set forth in claims 1, 2, 3 or 4 wherein said gaps between the longtitudinally extending side edges of said ribbon and said pole pieces are about three to seven mils.
Claim 8
Dependent Claim
30 words
The combination as set forth in claim 5 wherein said gaps between the longtitudinally extending side edges of said ribbon and said pole pieces are about three to seven mils.
Claim 9
Dependent Claim
93 words
In a ribbon loudspeaker having a sound radiating ribbon conductor suspended lengthwise between magnetic pole pieces, said ribbon having suspended terminal portions and a suspended centralized portion between said terminal portions, said ribbon being positioned with respect to said pole pieces and the longtitudinally extending side edges of said ribbon, said ribbon having relatively large amplitude transverse corregations formed within said suspended terminal ribbon portions perpendicular to said side edges of said ribbon and relatively small amplitude transverse corregations formed within said centralized ribbon portion perpendicular to said side edges of said ribbon.
Claim 10
Dependent Claim
93 words
In a ribbon loudspeaker having a sound radiating ribbon conductor suspended lengthwise between magnetic pole pieces, said ribbon having suspended terminal portions and a suspended centralized portion between said terminal portions, said ribbon being positioned with respect to said pole pieces and the longtitudinally extending side edges of said ribbon, said ribbon having relatively large amplitude transverse corregations formed within said suspended terminal ribbon portions perpendicular to said side edges of said ribbon and relatively small amplitude transverse corregations formed within said centralized ribbon portion perpendicular to said side edges of said ribbon.
Claim 11
Dependent Claim
48 words
The combination as set forth in claim 8 wherein the amplitudes of said corregations formed within said terminal portion are about 50 mils from peak to trough, and the amplitudes of said corregations formed within said centralized portion are about two to five mils from peak to trough.
Claim 12
Dependent Claim
30 words
The combination as set forth in claim 8 wherein the length of said centralized portion is about one half to three quarters of the entire suspended length of said ribbon.
Claim 13
Dependent Claim
30 words
The combination as set forth in claim 9 wherein the length of said centralized portion is about one half to three quarters of the entire suspended length of said ribbon.
Claim 14
Dependent Claim
64 words
The combination as set forth in claims 8, 9, 10 or 11 wherein said corregations formed within said terminal ribbon portions have a spacial frequency of about 10 corregations per linear inch along the length of said ribbon, and said corregations formed within said centralized ribbon portion have a spacial frequency of about 50 corregations per linear inch along the length of said ribbon.
Claim 15
Dependent Claim
34 words
The combination as set forth in claims 8, 9, 10 or 11 wherein said gaps between the longtitudinally extending side edges of said ribbon and said pole pieces are about three to seven mils.
Claim 16
Dependent Claim
30 words
The combination as set forth in claim 12 wherein said gaps between the longtitudinally extending side edges of said ribbon and said pole pieces are about three to seven mils.
Claim 17
Dependent Claim
141 words
In a ribbon loudspeaker having a sound radiating ribbon conductor suspended lengthwise between magnetic pole pieces, said ribbon having suspended terminal portions and a suspended centralized portion between said terminal portions, said ribbon being positioned with respect to said pole pieces so that gaps are formed between said pole pieces and the longtitudinally extending side edges of said ribbon, said ribbon having relatively large amplitude transverse corregations formed within said suspended terminal ribbon portions substantially perpendicular to said side edges of said ribbon and relatively small amplitude transverse corregations formed within said centralized ribbon portion substantially perpendicular to said side edges of said ribbon, and wherein the amplitudes of said corregations formed within said terminal portion are about 50 mils from peak to trough, and the amplitudes of said corregations formed within said centralized portion are substantially smaller than 50 mils.
Claim 18
Dependent Claim
141 words
In a ribbon loudspeaker having a sound radiating ribbon conductor suspended lengthwise between magnetic pole pieces, said ribbon having suspended terminal portions and a suspended centralized portion between said terminal portions, said ribbon being positioned with respect to said pole pieces so that gaps are formed between said pole pieces and the longtitudinally extending side edges of said ribbon, said ribbon having relatively large amplitude transverse corregations formed within said suspended terminal ribbon portions substantially perpendicular to said side edges of said ribbon and relatively small amplitude transverse corregations formed within said centralized ribbon portion substantially perpendicular to said side edges of said ribbon, and wherein the amplitudes of said corregations formed within said terminal portion are about 50 mils from peak to trough, and the amplitudes of said corregations formed within said centralized portion are substantially smaller than 50 mils.
Claim 19
Dependent Claim
30 words
The combination as set forth in claim 15 wherein the length of said centralized portion is about one half to three quarters of the entire suspended length of said ribbon.
Claim 20
Dependent Claim
63 words
The combination as set forth in claims 15 or 16 wherein said corregations formed within said terminal ribbon portions have a spacial frequency of about 10 corregations per linear inch along the length of said ribbon, and said corregations formed within said centralized ribbon portion have a spacial frequency substantially higher than 10 mils per linear inch along the length of said ribbon.
Claim 21
Dependent Claim
32 words
The combination as set forth in claims 15 or 16 wherein said gaps between the longtitudinally extending side edges of said ribbon and said pole pieces are about three to seven mils.
Claim 22
Dependent Claim
30 words
The combination as set forth in claim 18 wherein said gaps between the longtitudinally extend side edges of said ribbon and said pole pieces are about three to seven mils.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |