US4142604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker structure
Assignee: Individual
•
Filing: 1976-09-15
•
Granted: 1979-03-06
•
Expires: 1996-09-15
Abstract
Abstract A speaker structure comprising a tetrahedronal shell having an upper end and an equilateral triangular base with equisized triangular walls and with the margins of the adjacent walls and base being secured together and wherein one of the walls includes a pattern of port openings and these openings are arranged about a central opening spanned by a speaker which is fixed thereabout.
Inventors
- 👤 Todd G. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:20
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/02; H04R1/021; Y; Y10; Y10S; Y10S52/00; Y10S52/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
A speaker comprising: a tetrahedronal structure having an apex; an equilateral, triangular base; three substantially equisized and equilateral triangular planar walls, each wall meeting adjoining walls with an included angle of substantially 120 degrees measured parallel to the base, each wall having an upper vertex meeting at the apex, each wall having a base connected to the triangular base; a central opening in the center zone of one of the walls, said wall having three ports, each of the ports being aligned from the center of said wall toward the angles thereof and midway between; and a speaker means mounted in spanning relation to the central opening; whereby a reflex speaker enclosure entirely comprised of only four planar surfaces is created in which there are no internal surfaces parallel or perpendicular to each other, thus minimizing diffraction effects from internally reflected and overlapping sound waves.
Claim 2
Dependent Claim
145 words
A speaker comprising: a tetrahedronal structure having an apex; an equilateral, triangular base; three substantially equisized and equilateral triangular planar walls, each wall meeting adjoining walls with an included angle of substantially 120 degrees measured parallel to the base, each wall having an upper vertex meeting at the apex, each wall having a base connected to the triangular base; a central opening in the center zone of one of the walls, said wall having three ports, each of the ports being aligned from the center of said wall toward the angles thereof and midway between; and a speaker means mounted in spanning relation to the central opening; whereby a reflex speaker enclosure entirely comprised of only four planar surfaces is created in which there are no internal surfaces parallel or perpendicular to each other, thus minimizing diffraction effects from internally reflected and overlapping sound waves.
Claim 3
Dependent Claim
15 words
The speaker set forth in claim 1 wherein the speaker means is a triaxial speaker.
Claim 4
Dependent Claim
24 words
The speaker as set forth in claim 1 wherein a decorative open-work net material is arranged to cover said wall having the central opening.
Claim 5
Dependent Claim
25 words
The device as set forth in claim 2 wherein a cross-over network means is provided to co-phase the audio frequency of the triaxial speaker means.
Claim 6
Dependent Claim
17 words
The device as set forth in claim 1 wherein the walls and base are of plywood material.
Claim 7
Dependent Claim
16 words
The device as set forth in claim 5 wherein the walls and base are glued together.
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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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |