Patent US3637039A successfully refreshed from Google Patents.
US3637039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereo speaker system
Assignee: Dathar Corp
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Filing: 1971-04-19
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Granted: 1972-01-25
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Expires: 1991-04-19
Abstract
Abstract A speaker system having an array of speakers and a sealed enclosure, the number of speakers in the array being a multiple of six and the arrangement of the array being such that there is a multiple of three equally spaced speakers in each row and a multiple of two equally spaced rows. The center-to-center distance between adjacent rows is a function of the diameter of the speaker. The speakers in adjacent rows are not arranged in a rectangular array but in a parallelogram array and the angle between the centerline through speakers in one row and the center of the most closely adjacent speaker in the next row being between 30* and 60*. If two such speaker systems are connected in a stereo system, they are arranged so that the placement of the speakers in one enclosure is a mirror image of the placement of the speakers in the other enclosure.
Inventors
- 👤 Daniel Raichel
- 👤 Chris G De Vries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:37
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/40; H04R1/403
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
A speaker system comprising: A. An airtight enclosure comprising a panel; and B. A multiple of six drivers mounted on said panel and arranged in a multiple of two rows with a multiple of three drivers in each of said rows, the drivers in each of said rows being equally spaced and said rows being parallel to each other, said drivers being arranged in a parallelogram array with the acute angles of said parallelogram being between 30* and 60*.
Claim 2
Dependent Claim
79 words
A speaker system comprising: A. An airtight enclosure comprising a panel; and B. A multiple of six drivers mounted on said panel and arranged in a multiple of two rows with a multiple of three drivers in each of said rows, the drivers in each of said rows being equally spaced and said rows being parallel to each other, said drivers being arranged in a parallelogram array with the acute angles of said parallelogram being between 30* and 60*.
Claim 3
Dependent Claim
43 words
The speaker system of claim 1 in which each of said drivers has a dual cone comprising an outer cone and a dust cap, and the ratio of the diameter of said outer cone to said dust cap is at least approximately 8:1.
Claim 4
Dependent Claim
56 words
The speaker system of claim 1 in which said panel comprises a plurality of wells, one for each of said drivers, and each of said drivers comprises a mounting ring attached to the external surface of said panel with the remainder of each of said drivers extending through said well into the interior of said enclosure.
Claim 5
Dependent Claim
34 words
The speaker system of claim 3 comprising, in addition, an annular collar of sound-absorbent material within each of said wells and surrounding each of said drivers but separated from the cones of said drivers.
Claim 6
Dependent Claim
19 words
The speaker system of claim 4 in which the interior of said enclosure is substantially filled with sound-absorbent material.
Claim 7
Dependent Claim
15 words
The speaker system of claim 1 in which all of said drivers are substantially identical.
Claim 8
Dependent Claim
33 words
The speaker system of claim 1 in which said rows are spaced apart by a distance X determined by the equation X 1.25D + or -D/20 where D is the speaker mounting diameter.
Claim 9
Dependent Claim
35 words
The speaker system of claim 1 in which said acute angle is the complement of an angle theta determined by the equation 2/ phi 3/ theta where phi is the dispersive angle of said drivers.
Claim 10
Dependent Claim
112 words
The speaker system of claim 1 comprising, in addition, A. A second airtight enclosure comprising a panel; and B. A multiple of six drivers mounted on said last-named panel and arranged in a multiple of two parallel rows with a multiple of three equally spaced drivers in each of said rows, said drivers being arranged in a parallelogram array with the acute angles of said last-named array being between 30* and 60*, said second enclosure facing in the same direction as said first-named enclosure and laterally spaced therefrom and with the respective acute angles of the arrays in each of said enclosures being at the upper, outer corners of the respective panels.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |