Patent US3912866A successfully refreshed from Google Patents.
US3912866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folded bass horn speaker
Assignee: SHOWCO Inc A CORP OF
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Filing: 1974-01-30
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Granted: 1975-10-14
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Expires: 1994-01-30
Abstract
Abstract The specification discloses a folded bass horn speaker having a rectangular speaker cabinet with a rear wall and a front speaker opening. A housing having the exterior shape of a pyramid is mounted within the cabinet, with the pyramid base disposed toward the rear wall and the pyramid vertex disposed toward the front speaker opening. A speaker is mounted in the housing to direct sound through the pyramid base. A sound reflector having the shape of a pyramid is mounted at the base on the rear wall, with the reflector vertex being directed toward the speaker. Sound emitted from the speaker is reflected from the reflector and travels between the housing and the interior walls of the cabinet outwardly through the front speaker opening to provide a flat impedance curve and a smooth base response to to approximately 2,000 cycles per second.
Inventors
- 👤 Ronald E Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:36
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2861; H04R1/2865; H04R2201/00; H04R2201/34
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
114 words
A folded horn speaker comprising: a rectangular cabinet having a rear wall and a front speaker opening, a housing having a closed end directed toward said front speaker opening and an open end directed toward said rear wall, a speaker mounted within said housing for directing acoustic energy through said open end toward said rear wall, a four sided reflector having the shape of a pyramid with the rectangular pyramid base attached to said rear wall and the pyramid vertex disposed toward said speaker, said reflector being spaced from said speaker such that acoustic energy is reflected from said reflector and travels around the periphery of said housing outwardly through said front speaker opening.
Claim 2
Dependent Claim
114 words
A folded horn speaker comprising: a rectangular cabinet having a rear wall and a front speaker opening, a housing having a closed end directed toward said front speaker opening and an open end directed toward said rear wall, a speaker mounted within said housing for directing acoustic energy through said open end toward said rear wall, a four sided reflector having the shape of a pyramid with the rectangular pyramid base attached to said rear wall and the pyramid vertex disposed toward said speaker, said reflector being spaced from said speaker such that acoustic energy is reflected from said reflector and travels around the periphery of said housing outwardly through said front speaker opening.
Claim 3
Dependent Claim
23 words
The folded horn speaker of claim 1 wherein the edges of said reflector pyramid are parallel to the sides of said rectangular cabinet.
Claim 4
Dependent Claim
15 words
The folded horn speaker of claim 1 wherein said housing is shaped as a pyramid.
Claim 5
Dependent Claim
24 words
The folded horn speaker of claim 1 wherein the sides of said reflector pyramid extend from the pyramid base at an angle of 30*.
Claim 6
Dependent Claim
38 words
The folded horn speaker of claim 1 and further comprising: curved walls disposed between the base of said reflector pyramid and the side walls of said cabinet in order to direct sound outwardly through said front speaker opening.
Claim 7
Dependent Claim
27 words
The folded horn speaker of claim 1 and further comprising: braces extending from said housing and connected at the ends thereof to the corners of said cabinet.
Claim 8
Dependent Claim
21 words
The folded horn speaker of claim 1 wherein the vertex of said pyramid reflector extends into the cone of said speaker.
Claim 9
Dependent Claim
129 words
A folded bass horn speaker comprising: a speaker cabinet having a rear wall and a front speaker opening, a four sided housing having the exterior shape of a pyramid mounted within said cabinet with the rectangular pyramid base disposed toward said rear wall and the pyramid vertex disposed toward said front speaker opening, a speaker mounted within said housing to direct sound through said pyramid base, a four sided sound reflector having the configuration of a pyramid, the rectangular base of said reflector mounted on said rear wall and the reflector vertex being directed toward said speaker, wherein sound emitted from said speaker is reflected from said reflector and travels between the periphery of said housing and the interior walls of said cabinet outwardly through said front speaker opening.
Claim 10
Dependent Claim
129 words
A folded bass horn speaker comprising: a speaker cabinet having a rear wall and a front speaker opening, a four sided housing having the exterior shape of a pyramid mounted within said cabinet with the rectangular pyramid base disposed toward said rear wall and the pyramid vertex disposed toward said front speaker opening, a speaker mounted within said housing to direct sound through said pyramid base, a four sided sound reflector having the configuration of a pyramid, the rectangular base of said reflector mounted on said rear wall and the reflector vertex being directed toward said speaker, wherein sound emitted from said speaker is reflected from said reflector and travels between the periphery of said housing and the interior walls of said cabinet outwardly through said front speaker opening.
Claim 11
Dependent Claim
33 words
The folded bass horn speaker of claim 8 wherein said cabinet is rectangular and wherein the base edges of said housing and said reflector are parallel to the side walls of said cabinet.
Claim 12
Dependent Claim
22 words
The folded bass horn speaker of claim 8 wherein the vertex of said reflector extends within the speaker cone of said speaker.
Claim 13
Dependent Claim
27 words
The folded bass horn speaker of claim 8 and further comprising: planar side walls extending from the base of said four sided housing toward said rear wall.
Claim 14
Dependent Claim
21 words
The folded bass horn speaker of claim 11 wheRein said side walls are parallel to the interior walls of said cabinet.
Claim 15
Dependent Claim
22 words
The folded bass horn speaker of claim 11 wherein said side walls are slanted relative to the interior walls of said cabinet.
Claim 16
Dependent Claim
24 words
The folded bass horn speaker of claim 8 wherein the distance between said reflector and said speaker increases toward the periphery of said speaker.
Claim 17
Dependent Claim
29 words
The folded bass horn speaker of claim 8 wherein the height of said housing pyramid is equal to the housing pyramid base multiplied by four and divided by pi.
Claim 18
Dependent Claim
24 words
The folded bass horn speaker of claim 8 wherein the walls of said housing pyramid are oriented at 51.51* to the housing pyramid base.
Claim 19
Dependent Claim
31 words
The folded bass horn speaker of claim 8 wherein the horn speaker has a substantially flat impedance curve and a smooth bass frequency response up to approximately 2000 cycles per second.
References Cited (Backward Citations)
US2373692A
Cited
US2872516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |