Patent US4276446A successfully refreshed from Google Patents.
US4276446A
Expired / Lapsed
US
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Acoustic transducer system
Assignee: Individual
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Filing: 1979-10-05
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Granted: 1981-06-30
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Expires: 1999-10-05
Abstract
Abstract At least one active and one inactive speaker element or radiator are mounted in each of a plurality of differently sized speaker housings, each of which housings has a fundamental resonant frequency different from each of the other housings. An audio signal is applied simultaneously to each of the active radiators, which in turn create in each housing acoustical wave forms which drive the associated inactive speaker.
Inventors
- 👤 Anthony R. Taddeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:41
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/283; H04R1/2834
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
An acoustical speaker system, comprising a plurality of speaker housings each having therein a chamber, an active speaker element mounted in each of said chambers adjacent one end thereof and disposed to be connected to an electrical audio signal source to be driven thereby, and a passive speaker element mounted in each of said chambers adjacent the opposite end thereof and acoustically coupled to the associated driven speaker in said chamber, thereby to be driven by the acoustical signals developed in said chamber by said associated speaker, and each of said chambers having a fundamental resonant frequency which is different from that of each of the other chambers.
Claim 2
Dependent Claim
108 words
An acoustical speaker system, comprising a plurality of speaker housings each having therein a chamber, an active speaker element mounted in each of said chambers adjacent one end thereof and disposed to be connected to an electrical audio signal source to be driven thereby, and a passive speaker element mounted in each of said chambers adjacent the opposite end thereof and acoustically coupled to the associated driven speaker in said chamber, thereby to be driven by the acoustical signals developed in said chamber by said associated speaker, and each of said chambers having a fundamental resonant frequency which is different from that of each of the other chambers.
Claim 3
Dependent Claim
24 words
An acoustical speaker system as defined in claim 1 wherein each of said chambers has a size different from each of the other chambers.
Claim 4
Dependent Claim
34 words
An acoustical speaker system as defined in claim 2, wherein each of said chambers is circular in cross section and has an axial length different from the respective axial lengths of the other chambers.
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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |