Patent US3608665A successfully refreshed from Google Patents.
US3608665A
Expired / Lapsed
US
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Sound-reproducing structure
Assignee: Individual
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Filing: 1969-09-16
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Granted: 1971-09-28
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Expires: 1989-09-16
Abstract
Abstract A sound-reproducing structure wherein one or more loudspeakers are mounted on baffle means within a baffle housing to direct the sound (a) from the speaker, directly, forwardly outwardly through the forward opening of the cabinet; (b) against a reflecting surface within the cabinet and hence forwardly outwardly through the forward opening of the cabinet; (c) inwardly against the apex of the baffle means and hence forwardly outwardly through the forward opening of the cabinet. From the back of the cabinet, as a reverse phase, the sound follows a similar reflecting and retarding process but aimed toward the rear of the cabinet. The sound-reproducing structure effectively defines a phase division horn means wherein a portion of the total sound emanating forwardly and rearwardly from the cabinet is delayed in time before passing outwardly therefrom.
Inventors
- 👤 Mohamed B A Drisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:58
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2815; H04R1/2819; H04R1/227; H04R1/32; H04R1/40; H04R1/403
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
214 words
Sound-reproducing structure comprising: housing wall means defining a chamber having a front opening and a rear opening; baffle wall means extending fully across said chamber and having at least one portion extending angularly to the lateral extent of said front opening; and loudspeaker means facing solely toward the front opening of the chamber comprising a loudspeaker sealingly mounted in said baffle wall means intermediate said front and rear chamber openings to face angularly toward the front of said chamber to project sound from the front thereof outwardly through said front opening with a first portion of the sound being delivered directly forwardly outwardly through the front opening and a second portion of the sound being reflected from a portion of at least one of said wall means spaced from said loudspeaker, and to project oppositely phased sound from the rear thereof substantially only outwardly through said rear opening, said baffle wall means comprising a plurality of individual wall means each having at least one such loudspeaker mounted therein, said individual wall means being arranged to define a pyramid having its apex directed away from said front opening, the space forwardly of said baffle wall means in said housing being concave and the space rearwardly of said baffle wall means in said chamber being convex.
Claim 2
Dependent Claim
214 words
Sound-reproducing structure comprising: housing wall means defining a chamber having a front opening and a rear opening; baffle wall means extending fully across said chamber and having at least one portion extending angularly to the lateral extent of said front opening; and loudspeaker means facing solely toward the front opening of the chamber comprising a loudspeaker sealingly mounted in said baffle wall means intermediate said front and rear chamber openings to face angularly toward the front of said chamber to project sound from the front thereof outwardly through said front opening with a first portion of the sound being delivered directly forwardly outwardly through the front opening and a second portion of the sound being reflected from a portion of at least one of said wall means spaced from said loudspeaker, and to project oppositely phased sound from the rear thereof substantially only outwardly through said rear opening, said baffle wall means comprising a plurality of individual wall means each having at least one such loudspeaker mounted therein, said individual wall means being arranged to define a pyramid having its apex directed away from said front opening, the space forwardly of said baffle wall means in said housing being concave and the space rearwardly of said baffle wall means in said chamber being convex.
Claim 3
Dependent Claim
13 words
The sound-reproducing structure of claim 1 wherein said pyramiD comprises a four-sided pyramid.
Claim 4
Dependent Claim
17 words
The sound-reproducing structure of claim 1 wherein said pyramid comprises a four-sided pyramid having isosceles triangular sides.
Claim 5
Dependent Claim
89 words
Sound-reproducing structure comprising: a housing defining a rectangular parallelepiped chamber having an open front and an open rear; a pyramidal baffle means in said chamber having its base substantially coincident with the front of said wall means to open through said open front of the chamber, the apex of said pyramidal baffle means being adjacent said open rear of the chamber; and a loudspeaker sealingly mounted in each of sidewalls of said pyramidal baffle, said loudspeakers being symmetrically arranged about the axis of said open front of the chamber.
Claim 6
Dependent Claim
89 words
Sound-reproducing structure comprising: a housing defining a rectangular parallelepiped chamber having an open front and an open rear; a pyramidal baffle means in said chamber having its base substantially coincident with the front of said wall means to open through said open front of the chamber, the apex of said pyramidal baffle means being adjacent said open rear of the chamber; and a loudspeaker sealingly mounted in each of sidewalls of said pyramidal baffle, said loudspeakers being symmetrically arranged about the axis of said open front of the chamber.
Claim 7
Dependent Claim
25 words
The sound-reproducing structure of claim 4 wherein said speakers are mounted on the altitude lines of said sidewalls extending from said base to said apex.
Claim 8
Dependent Claim
36 words
The sound-reproducing structure of claim 4 wherein said pyramid has a polygonal base having an even number of sides whereby said loudspeakers are disposed in opposed pairs, one each on the opposite sides of the pyramid.
Claim 9
Dependent Claim
19 words
The sound-reproducing structure of claim 4 wherein said baffle means extends fully to the open rear of said chamber.
Claim 10
Dependent Claim
22 words
The sound-reproducing structure of the claim 4 wherein said pyramidal baffle means opens axially perpendicularly to the open front of the chamber.
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |