US3715008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker cabinet assembly and method
Assignee: CBS Broadcasting Inc
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Filing: 1972-01-31
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Granted: 1973-02-06
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Expires: 1992-01-31
Abstract
Abstract An extremely rigid and acoustically-excellent, yet low-cost, loudspeaker cabinet assembly is formed by combining two trapezoidal speaker baffles with two triangular speaker baffles. Such baffles, with their associated speakers, are mounted in inclined manner in a rectangular cabinet and are braced by triangular braces which connect from adjacent edges of the baffles to the back of the cabinet. The braces do not extend outwardly to the cabinet corners, so that the chambers defined behind the baffles are in communication with each other. The baffle edges, at regions between the braces and the cabinet corners, are spaced from each other to form ports for the speakers. Elastic knit grill cloth is stretched over the cabinet front and is centrally depressed by means of a connector member, the result being a highly attractive horn-shaped configuration. In accordance with the method, the baffles are mounted individually. The braces are then inserted through speaker openings in the baffles, and are slid radially inwardly as far as permitted by the baffles. Loudspeakers are then front-mounted on the baffles, and the grill cloth is mounted and stretched.
Inventors
- 👤 S Lover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:23
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/227
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
292 words
A loudspeaker cabinet assembly, which comprises: an elongated rectangular cabinet having a closed back and an open front, first and second generally triangular inclined baffles mounted, respectively, in opposed end portions of said cabinet, said first triangular baffle having its base portion secured to one end wall of said cabinet and at a region relatively adjacent the open front thereof, the vertex portion of said first baffle being relatively adjacent and connected to the back wall of said cabinet, said second triangular baffle having its base portion secured to the other end wall of said cabinet and at a region relatively adjacent said open front thereof, the vertex portion of said second baffle being relatively adjacent and connected to said back wall of said cabinet, first and second generally trapezoidal inclined baffles mounted, respectively, in opposed side portions of said cabinet, said first trapezoidal baffle having its base portion secured to one side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said first trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, said second trapezoidal baffle having its base portion secured to the other side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said second trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, means to vent to the atmosphere the portions of said cabinet between said baffles and said back cabinet wall, loudspeakers mounted over openings provided through at least a plurality of said baffles, and grill cloth mounted over said open front of said cabinet to conceal said baffles and said loudspeakers.
Claim 2
Dependent Claim
292 words
A loudspeaker cabinet assembly, which comprises: an elongated rectangular cabinet having a closed back and an open front, first and second generally triangular inclined baffles mounted, respectively, in opposed end portions of said cabinet, said first triangular baffle having its base portion secured to one end wall of said cabinet and at a region relatively adjacent the open front thereof, the vertex portion of said first baffle being relatively adjacent and connected to the back wall of said cabinet, said second triangular baffle having its base portion secured to the other end wall of said cabinet and at a region relatively adjacent said open front thereof, the vertex portion of said second baffle being relatively adjacent and connected to said back wall of said cabinet, first and second generally trapezoidal inclined baffles mounted, respectively, in opposed side portions of said cabinet, said first trapezoidal baffle having its base portion secured to one side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said first trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, said second trapezoidal baffle having its base portion secured to the other side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said second trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, means to vent to the atmosphere the portions of said cabinet between said baffles and said back cabinet wall, loudspeakers mounted over openings provided through at least a plurality of said baffles, and grill cloth mounted over said open front of said cabinet to conceal said baffles and said loudspeakers.
Claim 3
Dependent Claim
292 words
A loudspeaker cabinet assembly, which comprises: an elongated rectangular cabinet having a closed back and an open front, first and second generally triangular inclined baffles mounted, respectively, in opposed end portions of said cabinet, said first triangular baffle having its base portion secured to one end wall of said cabinet and at a region relatively adjacent the open front thereof, the vertex portion of said first baffle being relatively adjacent and connected to the back wall of said cabinet, said second triangular baffle having its base portion secured to the other end wall of said cabinet and at a region relatively adjacent said open front thereof, the vertex portion of said second baffle being relatively adjacent and connected to said back wall of said cabinet, first and second generally trapezoidal inclined baffles mounted, respectively, in opposed side portions of said cabinet, said first trapezoidal baffle having its base portion secured to one side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said first trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, said second trapezoidal baffle having its base portion secured to the other side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said second trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, means to vent to the atmosphere the portions of said cabinet between said baffles and said back cabinet wall, loudspeakers mounted over openings provided through at least a plurality of said baffles, and grill cloth mounted over said open front of said cabinet to conceal said baffles and said loudspeakers.
Claim 4
Dependent Claim
292 words
A loudspeaker cabinet assembly, which comprises: an elongated rectangular cabinet having a closed back and an open front, first and second generally triangular inclined baffles mounted, respectively, in opposed end portions of said cabinet, said first triangular baffle having its base portion secured to one end wall of said cabinet and at a region relatively adjacent the open front thereof, the vertex portion of said first baffle being relatively adjacent and connected to the back wall of said cabinet, said second triangular baffle having its base portion secured to the other end wall of said cabinet and at a region relatively adjacent said open front thereof, the vertex portion of said second baffle being relatively adjacent and connected to said back wall of said cabinet, first and second generally trapezoidal inclined baffles mounted, respectively, in opposed side portions of said cabinet, said first trapezoidal baffle having its base portion secured to one side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said first trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, said second trapezoidal baffle having its base portion secured to the other side wall of said cabinet and at a region relatively adjacent said open front thereof, the portion of said second trapezoidal baffle opposite said base portion thereof being relatively adjacent and connected to said back wall of said cabinet, means to vent to the atmosphere the portions of said cabinet between said baffles and said back cabinet wall, loudspeakers mounted over openings provided through at least a plurality of said baffles, and grill cloth mounted over said open front of said cabinet to conceal said baffles and said loudspeakers.
Claim 5
Dependent Claim
72 words
The invention as claimed in claim 1, in which said baffles are connected to said back wall of said cabinet by means comprising an elongated rectangular key member which is secured to said back wall, the sides of said key member being respectively adjacent said portions of said trapezoidal baffles which are opposite said base portions thereof, the ends of said key member being respectively adjacent said vertexes of said triangular baffles.
Claim 6
Dependent Claim
151 words
A loudspeaker cabinet assembly, which comprises: a cabinet having a closed back and an open front, several baffles mounted in inclined relationship in said cabinet, each of said baffles having a base edge and also having two side edges which converge toward each other in a direction away from said base edge, said base edges being connected, respectively, to side wall portions of said cabinet and at regions relatively adjacent the open front of said cabinet, the portions of said baffles remote from said base edges being relatively adjacent and connected to the back wall of said cabinet, a side edge of each baffle being spaced away from the proximate side edge of the adjacent baffle, whereby slots or gaps are formed between side edges of adjacent baffles, and loudspeakers mounted on at least a plurality of said baffles over openings therethrough, said loudspeakers being ported by said slots or gaps.
Claim 7
Dependent Claim
151 words
A loudspeaker cabinet assembly, which comprises: a cabinet having a closed back and an open front, several baffles mounted in inclined relationship in said cabinet, each of said baffles having a base edge and also having two side edges which converge toward each other in a direction away from said base edge, said base edges being connected, respectively, to side wall portions of said cabinet and at regions relatively adjacent the open front of said cabinet, the portions of said baffles remote from said base edges being relatively adjacent and connected to the back wall of said cabinet, a side edge of each baffle being spaced away from the proximate side edge of the adjacent baffle, whereby slots or gaps are formed between side edges of adjacent baffles, and loudspeakers mounted on at least a plurality of said baffles over openings therethrough, said loudspeakers being ported by said slots or gaps.
Claim 8
Dependent Claim
52 words
The invention as claimed in claim 3, in which means are provided to close the portioNs of said slots which are relatively adjacent the central region of said cabinet, whereby the ports for said speakers include only the portions of said slots which are relatively adjacent the side walls of said cabinet.
Claim 9
Dependent Claim
48 words
The invention as claim in claim 4, in which said closure means comprise braces having forward edges which close said central slot portions, and also having rear edges which are connected to said back wall of said cabinet, said braces making said baffles and said cabinet relatively rigid.
Claim 10
Dependent Claim
59 words
The invention as claimed in claim 3, in which an air-pervious grill cloth is mounted over the front of said cabinet, said grill cloth being formed of stretchable knit fabric, the central region of said grill cloth being stretched inwardly toward said baffle portions remote from said base edges, whereby the shape of said grill cloth simulates a horn.
Claim 11
Dependent Claim
27 words
The invention as claimed in claim 6, in which a connector means is connected between said back wall and the central region of said stretchable grill cloth.
Claim 12
Dependent Claim
182 words
A loudspeaker cabinet assembly, which comprises: a rectangular cabinet having a closed back and an open front, four baffles mounted in inclined relationship in said cabinet, each of said baffles being inclined at the same angle to the back wall of said cabinet, each of said baffles having a base edge and also having two side edges which converge toward each other in a direction away from said base edge, said base edges being connected, respectively, to the side walls of said cabinet and at regions relatively adjacent the open front of said cabinet, the portions of said baffles remote from said base edges being relatively adjacent and connected to said back wall of said cabinet, said baffles having dimensions sufficiently small, in directions parallel to said base edges thereof, that each side edge of each baffle is spaced away from the opposed side edge of the adjacent baffle, whereby slots are formed between the opposed side edges of adjacent baffles, and loudspeakers mounted on at least a plurality of said baffles over openings therethrough, said loudspeakers being ported by said slots.
Claim 13
Dependent Claim
182 words
A loudspeaker cabinet assembly, which comprises: a rectangular cabinet having a closed back and an open front, four baffles mounted in inclined relationship in said cabinet, each of said baffles being inclined at the same angle to the back wall of said cabinet, each of said baffles having a base edge and also having two side edges which converge toward each other in a direction away from said base edge, said base edges being connected, respectively, to the side walls of said cabinet and at regions relatively adjacent the open front of said cabinet, the portions of said baffles remote from said base edges being relatively adjacent and connected to said back wall of said cabinet, said baffles having dimensions sufficiently small, in directions parallel to said base edges thereof, that each side edge of each baffle is spaced away from the opposed side edge of the adjacent baffle, whereby slots are formed between the opposed side edges of adjacent baffles, and loudspeakers mounted on at least a plurality of said baffles over openings therethrough, said loudspeakers being ported by said slots.
Claim 14
Dependent Claim
48 words
The invention as claimed in claim 8, in which a key member is connected centrally to said back wall of said cabinet and forms at least part of the means for connecting to said back wall said portions of said baffles which are remote from said base edges.
Claim 15
Dependent Claim
81 words
The invention as claimed in claim 9, in which two opposed ones of said baffles are generally trapezoidal, in which the remaining two opposed ones of said baffles are generally triangular, in which said key member is elongated and is connected at its ends to the vertex portions of said triangular baffles, and in which said key member is connected at its sides to the edges of said trapezoidal baffles which are parallel to and remote from the base edges thereof.
Claim 16
Dependent Claim
52 words
The invention as claimed in claim 8, in which means are provided to close the portions of said slots which are relatively adjacent the central region of said cabinet, whereby the ports for said speakers include only the portions of said slots which are relatively adjacent the side walls of said cabinet.
Claim 17
Dependent Claim
48 words
The invention as claimed in claim 11, in which said closure means comprise braces having forward edges which close said central slot portions, and also having rear edges which are connected to said back wall of said cabinet, said braces making said baffles and said cabinet relatively rigid.
Claim 18
Dependent Claim
45 words
The invention as claimed in claim 12, in which said braces are triangular in shape and have inner portions which are adjacent the central part of said back wall, said braces having outer edge portions which are spaced from the side walls of said cabinet.
Claim 19
Dependent Claim
58 words
The invention as claimed in claim 13, in which the opposed edges of said baffles are parallel to each other, in which the forward edges of said triangular braces are seated between, and bridge the gaps between, adjacent edge portions of saId baffles, and in which a cement and filler means is provided along said forward brace edges.
Claim 20
Dependent Claim
26 words
The invention as claimed in claim 14, in which said cement and filler means is a cement of a type which does not become completely hard.
Claim 21
Dependent Claim
27 words
The invention as claimed in claim 14, in which the forward edges of said triangular braces are doubly beveled to seat the side edges of said baffles.
Claim 22
Independent Claim
204 words
A method of assembling a loudspeaker cabinet, which comprises: providing a rectangular cabinet having an open front and a closed back, providing four speaker baffles each having a relatively long base edge, and also having two side edges which converge in a direction away from said base edge, mounting the first of said baffles in inclined relationship in said cabinet, with said base edge disposed along and connected to one side wall of said cabinet relatively adjacent the open front of said cabinet, and with the baffle portion remote from said base edge disposed relatively adjacent and connected to the central region of the back wall of said cabinet, separately mounting the second, third and fourth of said baffles in said cabinet in a manner similar to the mounting of said first baffle, and also in such manner that each side edge of each baffle is opposed to and spaced from a side edge of the adjacent baffle, to thus form port slots between said opposed side edges, said port slots permitting each baffle to be mounted separately from the others, in simple manner, and filling in and closing portions of said port slots which are remote from the side walls of said cabinet.
Claim 23
Independent Claim
204 words
A method of assembling a loudspeaker cabinet, which comprises: providing a rectangular cabinet having an open front and a closed back, providing four speaker baffles each having a relatively long base edge, and also having two side edges which converge in a direction away from said base edge, mounting the first of said baffles in inclined relationship in said cabinet, with said base edge disposed along and connected to one side wall of said cabinet relatively adjacent the open front of said cabinet, and with the baffle portion remote from said base edge disposed relatively adjacent and connected to the central region of the back wall of said cabinet, separately mounting the second, third and fourth of said baffles in said cabinet in a manner similar to the mounting of said first baffle, and also in such manner that each side edge of each baffle is opposed to and spaced from a side edge of the adjacent baffle, to thus form port slots between said opposed side edges, said port slots permitting each baffle to be mounted separately from the others, in simple manner, and filling in and closing portions of said port slots which are remote from the side walls of said cabinet.
Claim 24
Dependent Claim
65 words
The invention as claimed in claim 17, in which said method further comprises inclining each of said four baffles at the same angle relative to said back wall of said cabinet, and also comprises effecting said filling and closing step by mounting a brace at each pair of opposed side edges of said baffles and in spaced relationship from the side walls of said cabinet.
Claim 25
Dependent Claim
38 words
The invention as claimed in claim 18, in which at least a plurality of said baffles have large-diameter speaker openings therethrough, and in which said step of mounting said braces comprises inserting each brace through a speaker opening.
Claim 26
Dependent Claim
50 words
The invention as claimed in claim 18, in which said step of mounting said braces comprises sliding each brace toward the central region of said cabinet to a position such that firm contact is made with the opposed side edges of said baffles, and then securing such brace in position.
Claim 27
Dependent Claim
27 words
The invention as claimed in claim 20, in which said securing step is effected at the forward edge of each brace by a cement and filler material.
Claim 28
Dependent Claim
32 words
The invention as claimed in claim 17, in which said method further comprises effecting front-mounting of loudspeakers over openings in said baffles, and mounting grill cloth over the front of said cabinet.
Claim 29
Dependent Claim
46 words
The invention as claimed in claim 22, in which said method further comprises employing stretchable knit grill cloth, forcing the central region of said cloth toward said back wall to cause said cloth to be horn-like, and maintaining said grill cloth in such horn-like stretched condition.
Claim 30
Dependent Claim
82 words
A loudspeaker cabinet assembly, which comprises: a cabinet having an open front portion, loudspeaker means mounted in said cabinet in spaced relationship from said open front portion thereof, stretchable knit porous grill cloth mounted over said open front portion, and means to stretch the central region of said grill cloth rearwardly from said front portion to thus cause said grill cloth to assume a horn-like shape, said stretch means including means to secure said central grill cloth region in said rearwardly-stretched condition.
Claim 31
Dependent Claim
82 words
A loudspeaker cabinet assembly, which comprises: a cabinet having an open front portion, loudspeaker means mounted in said cabinet in spaced relationship from said open front portion thereof, stretchable knit porous grill cloth mounted over said open front portion, and means to stretch the central region of said grill cloth rearwardly from said front portion to thus cause said grill cloth to assume a horn-like shape, said stretch means including means to secure said central grill cloth region in said rearwardly-stretched condition.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |