US3845246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker system
Assignee: GTE Sylvania Inc
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Filing: 1973-03-28
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Granted: 1974-10-29
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Expires: 1993-03-28
Abstract
Abstract A high fidelity sound reproduction system includes an air-sealed cabinet with an interior divider providing first and second airsealed compartments with a loudspeaker affixed in air-sealed relationship to each compartment and the loudspeakers electrically connected in parallel for receiving the same signals whereby bass response is enhanced.
Inventors
- 👤 J Ouvrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:07
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/227
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
In a high fidelity sound reproduction system, a single channel loudspeaker system comprising: an air-sealed cabinet forming an air-sealed enclosure; divider means disposed within said air-sealed enclosure and affixed to provide first and second air-sealed compartments, said first and second compartments having unequal volumes and each having a resonance in the range of between 30 and 40 Hz.; and loudspeaker means including a pair of similar loudspeakers electrically coupled in parallel with each loudspeaker disposed within and affixed to one of said first and second compartments.
Claim 2
Dependent Claim
86 words
In a high fidelity sound reproduction system, a single channel loudspeaker system comprising: an air-sealed cabinet forming an air-sealed enclosure; divider means disposed within said air-sealed enclosure and affixed to provide first and second air-sealed compartments, said first and second compartments having unequal volumes and each having a resonance in the range of between 30 and 40 Hz.; and loudspeaker means including a pair of similar loudspeakers electrically coupled in parallel with each loudspeaker disposed within and affixed to one of said first and second compartments.
Claim 3
Dependent Claim
38 words
The loudspeaker system of claim 1 wherein each one of said pair of loudspeakers has a nominal diameter of about 12 inches and said first and second compartments have a resonance of about 30 and 40 Hz respectively.
Claim 4
Dependent Claim
87 words
In a multiple-channel high fidelity stereophonic sound reproduction system, a single channel loudspeaker system comprising: an air-sealed cabinet; divider means disposed within said cabinet to provide a plurality of air-sealed compartments having unequal volumes with a resonanT frequency of each in the range of about 30-40 Hz.; and a plurality of loudspeakers each being a base speaker having a nominal diameter of about 12 inches, parallel coupled electrically with one of said loudspeakers disposed within and affixed in air-sealed relationship to each of said plurality of compartments.
Claim 5
Dependent Claim
87 words
In a multiple-channel high fidelity stereophonic sound reproduction system, a single channel loudspeaker system comprising: an air-sealed cabinet; divider means disposed within said cabinet to provide a plurality of air-sealed compartments having unequal volumes with a resonanT frequency of each in the range of about 30-40 Hz.; and a plurality of loudspeakers each being a base speaker having a nominal diameter of about 12 inches, parallel coupled electrically with one of said loudspeakers disposed within and affixed in air-sealed relationship to each of said plurality of compartments.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |