Patent US3772258A successfully refreshed from Google Patents.
Patent US3582553A successfully refreshed from Google Patents.
US3582553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker system
Assignee: Bose Corp
•
Filing: 1967-12-04
•
Granted: 1971-06-01
•
Expires: 1987-12-04
Abstract
Abstract A loudspeaker system comprises two angularly displaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers and partially enclosing a substantially fluid-tight volume also enclosed by a front baffle containing a small asymmetrically located loudspeaker so that the angularly inclined baffles typically face a wall to which the front baffle is generally parallel. The small loudspeakers are connected in phase and energized through means including a complementing circuit so that the overall system is characterized by a phase-frequency response characteristic that pleasingly reproduces music.
Inventors
- 👤 Amar G Bose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:00
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/02; H04R1/00; H04R1/20; H04R1/22; H04R1/26; H04R1/32; H04R1/323; H04R2205/00; H04R2205/024
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
223 words
A loudspeaker system comprising, first means defining a front panel arranged to be situated normally generally parallel to a wall, second means defining a rear baffle including means for supporting at least one upper frequency radiating means, means including said first means and said second mean for defining a loudspeaker cabinet enclosing an internal volume, said first and second means being relatively positioned so that with said loudspeaker cabinet normally positioned with said front panel generally parallel to a wall, a plurality of upper frequency radiating means carried by said means for supporting are positioned for emitting upper frequency sound in a beam that has a rearward component directed away from said front panel toward said wall and a sideward component directed generally parallel to said wall, means including said upper frequency radiating mean and said loudspeaker cabinEt enclosing said internal volume substantially fluidtight and means associated with said upper frequency radiating means for establishing the free field infinite baffle pressure frequency response along the axis thereof higher relative to the response in the middle range of audio frequencies while coacting with all the elements in said loudspeaker system to provide an essentially uniform radiated power density spectrum frequency response over substantially the entire audible frequency range when said loudspeaker system is normally positioned with said front panel generally parallel to a wall.
Claim 2
Dependent Claim
223 words
A loudspeaker system comprising, first means defining a front panel arranged to be situated normally generally parallel to a wall, second means defining a rear baffle including means for supporting at least one upper frequency radiating means, means including said first means and said second mean for defining a loudspeaker cabinet enclosing an internal volume, said first and second means being relatively positioned so that with said loudspeaker cabinet normally positioned with said front panel generally parallel to a wall, a plurality of upper frequency radiating means carried by said means for supporting are positioned for emitting upper frequency sound in a beam that has a rearward component directed away from said front panel toward said wall and a sideward component directed generally parallel to said wall, means including said upper frequency radiating mean and said loudspeaker cabinEt enclosing said internal volume substantially fluidtight and means associated with said upper frequency radiating means for establishing the free field infinite baffle pressure frequency response along the axis thereof higher relative to the response in the middle range of audio frequencies while coacting with all the elements in said loudspeaker system to provide an essentially uniform radiated power density spectrum frequency response over substantially the entire audible frequency range when said loudspeaker system is normally positioned with said front panel generally parallel to a wall.
Claim 3
Dependent Claim
112 words
A loudspeaker system in accordance with claim 1 and further comprising, third means defining another rear baffle including means for supporting at least another upper frequency radiating means, said third means being positioned relative to said first and second means so that with said loudspeaker cabinet normally positioned with said front panel generally parallel to a wall, an upper frequency radiating means carried by said means for supporting of said third means is positioned for emitting upper frequency sound in a beam that has a rearward component directed away from said front panel toward said wall and a sideward component directed generally parallel to said wall opposite to said first-mentioned sideward component.
Claim 4
Dependent Claim
105 words
A loudspeaker system in accordance with claim 1 wherein said front panel includes mans for supporting at least one front upper frequency radiating means so that with said loudspeaker cabinet normally positioned with said front panel generally parallel to a wall, a front upper frequency radiating means carried by said means for supporting is positioned for emitting upper frequency sound without reflection in a direction away from said wall, and further comprising said at least one front upper frequency radiating means carried by said means for supporting, and means including said upper frequency radiating means and said loudspeaker cabinet enclosing said internal volume substantially fluidtight
Claim 5
Dependent Claim
100 words
A loudspeaker system in accordance with claim 2 wherein said front panel includes means for supporting at least one upper frequency radiating means so that with said loudspeaker cabinet normally positioned with said front panel generally parallel to a wall, a front upper frequency radiating means carried by said means for supporting is positioned for emitting upper frequency sound directed away from said wall, and further comprising said at least one front upper frequency radiating means carried by said means for supporting, and means including said upper frequency radiating means and said loudspeaker cabinet enclosing said internal volume substantially fluidtight
Claim 6
Dependent Claim
21 words
A loudspeaker system in accordance with claim 1 wherein said first means and said second means are nonparallel to one another.
Claim 7
Dependent Claim
24 words
A loudspeaker system in accordance with claim 2 wherein said first means, said second means and said third means are nonparallel to one another.
Claim 8
Dependent Claim
21 words
A loudspeaker system in accordance with claim 3 wherein said first means and said second means are nonparallel to one another.
Claim 9
Dependent Claim
24 words
A loudspeaker system in accordance with claim 4 wherein said first means, said second means and said third means are nonparallel to one another.
Claim 10
Dependent Claim
28 words
A loudspeaker system in accordance with claim 6 wherein small loudspeakers comprising said upper frequency radiating means occupy most of the area of each of said rear baffles.
Claim 11
Dependent Claim
44 words
A loudspeaker system in accordance with claim 9 wherein said front panel includes means for supporting a number of small loudspeakers that is less than the number of small loudspeakers said means for supporting on said second and third means is arranged to support.
Claim 12
Dependent Claim
26 words
A loudspeaker system in accordance with claim 10 wherein said front panel means for supporting is asymmetrically located from the bounding edges of said front panel.
Claim 13
Dependent Claim
78 words
A loudspeaker system in accordance with claim 9 wherein Said rear baffles are contiguous flat panels forming an angle, and said loudspeaker cabinet comprises a pair of side panels each interconnecting a respective normally vertical edge of said front panel with a normally vertical edge of a respective rear baffle flat panel to define said internal volume as of pentagonal cross section and interconnecting generally parallel top and bottom panels to coact therewith and define said internal volume.
Claim 14
Dependent Claim
21 words
A loudspeaker system in accordance with claim 12 wherein said front panel includes means for supporting only a single small loudspeaker.
Claim 15
Dependent Claim
32 words
A loudspeaker system in accordance with claim 13 wherein said front panel means for supporting is asymmetrically located with respect to the normally vertical and normally horizontal edges of said front panel.
Claim 16
Dependent Claim
30 words
A loudspeaker system in accordance with claim 12 and further comprising means for cophasally energizing all said small loudspeakers with electrical energy over substantially the full range of audio frequencies.
Claim 17
Dependent Claim
30 words
A loudspeaker system in accordance with claim 13 and further comprising means for cophasally energizing all said small loudspeakers with electrical energy over substantially the full range of audio frequencies.
Claim 18
Dependent Claim
30 words
A loudspeaker system in accordance with claim 14 and further comprising means for cophasally energizing all said small loudspeakers with electrical energy over substantially the full range of audio frequencies.
Claim 19
Dependent Claim
18 words
A loudspeaker system in accordance with claim 12 wherein each of said rear baffle panels is substantially square.
Claim 20
Dependent Claim
58 words
A loudspeaker system in accordance with claim 16 and further comprising, means for delivering much less of high frequency electrical energy for direct radiation from said front panel than is delivered for radiation from said rear baffles in a ratio corresponding substantially to the ratio of direct to reflected energy received by a listener in a concert hall.
Claim 21
Dependent Claim
17 words
A loudspeaker system in accordance with claim 19 wherein said ratio is of the order of 1:8.
Claim 22
Dependent Claim
19 words
A loudspeaker system in accordance with claim 20 wherein each of said rear baffles supports four like small loudspeakers.
Claim 23
Dependent Claim
14 words
A loudspeaker system in accordance with claim 12 wherein said angle is substantially 120*.
Claim 24
Dependent Claim
42 words
A loudspeaker system in accordance with claim 2 and further comprising an internal panel inside said loudspeaker cabinet extending between said front panel and the junction between said rear baffles for dividing said internal volume into a pair of acoustically isolated chambers.
Claim 25
Dependent Claim
49 words
A loudspeaker system in accordance with claim 12 and further comprising an internal panel inside loudspeaker cabinet extending between said front panel and the junction between said rear baffle panels and between said top and bottom panels for dividing said internal volume into a pair of acoustically isolated chambers.
Claim 26
Dependent Claim
21 words
A loudspeaker system in accordance with claim 23 wherein said front panel includes means for supporting only a single small loudspeaker.
Claim 27
Dependent Claim
93 words
A loudspeaker system in accordance with claim 23 and further comprising a plurality of small loudspeaker comprising said upper frequency radiating means, means including said small loudspeakers and said loudspeaker cabinet enclosing said internal volume substantially fluidtight with each of said pair of acoustically isolated chambers being substantially fluidtight, first coupling means for energizing each small loudspeaker carried by said second means with first channel energy, and second coupling means for energizing each small loudspeaker carried by said third means with second channel energy that may be different from said first channel energy.
Claim 28
Dependent Claim
47 words
A loudspeaker system in accordance with claim 26 wherein said front panel also includes means for supporting, and at least one of said small loudspeakers, and further comprising, means for coupling both first channel energy and second channel energy to the last-mentioned at least onE small loudspeaker.
Claim 29
Dependent Claim
34 words
A loudspeaker system in accordance with claim 26 wherein each of said coupling means includes means for energizing each small loudspeaker coupled thereto with electrical energy over substantially the full range of audio frequencies.
Claim 30
Dependent Claim
164 words
A reflecting loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, upper frequency radiating means, means for supporting said upper frequency radiating means so that most upper frequency sound energy is directed across the plane of said rear panel and reaches a listener after a first reflection from said adjacent wall when normally positioned in a room, and means associated with said upper frequency radiating means for establishing a radiation characteristic of said upper frequency radiating means so that the free field infinite baffle pressure response along the axis thereof is higher relative to the response in the middle range of audio frequencies while coacting with all the elements in said reflecting loudspeaker system to provide an essentially uniform radiated power density spectrum frequency response over substantially the entire audible frequency range when said loudspeaker system is in a normal room listening position.
Claim 31
Dependent Claim
164 words
A reflecting loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, upper frequency radiating means, means for supporting said upper frequency radiating means so that most upper frequency sound energy is directed across the plane of said rear panel and reaches a listener after a first reflection from said adjacent wall when normally positioned in a room, and means associated with said upper frequency radiating means for establishing a radiation characteristic of said upper frequency radiating means so that the free field infinite baffle pressure response along the axis thereof is higher relative to the response in the middle range of audio frequencies while coacting with all the elements in said reflecting loudspeaker system to provide an essentially uniform radiated power density spectrum frequency response over substantially the entire audible frequency range when said loudspeaker system is in a normal room listening position.
Claim 32
Dependent Claim
112 words
A loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, sound radiating means for first directing most of the sound energy therefrom across the plane of said rear panel upon said adjacent wall and then to a listener when said sound radiating means is normally positioned in a room, and complementing means coacting with said sound radiating means for establishing an essentially uniform radiated power density spectrum frequency response over substantially the entire audible frequency range for said loudspeaker system when said sound radiating means is normally positioned in a room.
Claim 33
Dependent Claim
112 words
A loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, sound radiating means for first directing most of the sound energy therefrom across the plane of said rear panel upon said adjacent wall and then to a listener when said sound radiating means is normally positioned in a room, and complementing means coacting with said sound radiating means for establishing an essentially uniform radiated power density spectrum frequency response over substantially the entire audible frequency range for said loudspeaker system when said sound radiating means is normally positioned in a room.
Claim 34
Dependent Claim
74 words
A first loudspeaker system in accordance with claim 1, a second loudspeaker system in accordance with claim 1, said wall, the first and second loudspeaker system cabinets being spaced along said wall with the front panel of each generally parallel to said wall and said second means of each facing said wall so that upper frequency sound beams directed from each second means are reflected from said wall through the region between said cabinets.
Claim 35
Dependent Claim
148 words
A loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, a plurality of upper frequency radiating means intercoupled for cophasal excitation, means for supporting said upper frequency radiating means so that some of the energy radiated therefrom reaches a listener over a first direct path and the remainder of said energy reaches said listener over other indirect paths which are longer than said first direct path and first crosses the plane of said rear panel, means for establishing said some of the energy less than said remainder, and complementing means associated with said system and coacting therewith for establishing an essentially uniform radiated power density spectrum frequency response for said system over at least the audible frequency range of energy radiated by said upper frequency radiating means.
Claim 36
Dependent Claim
148 words
A loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, a plurality of upper frequency radiating means intercoupled for cophasal excitation, means for supporting said upper frequency radiating means so that some of the energy radiated therefrom reaches a listener over a first direct path and the remainder of said energy reaches said listener over other indirect paths which are longer than said first direct path and first crosses the plane of said rear panel, means for establishing said some of the energy less than said remainder, and complementing means associated with said system and coacting therewith for establishing an essentially uniform radiated power density spectrum frequency response for said system over at least the audible frequency range of energy radiated by said upper frequency radiating means.
Claim 37
Dependent Claim
137 words
A loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, radiating means for directing most of the sound energy therefrom first across the plane of said rear panel, then said adjacent wall and then to a listener when said sound radiating means is normally positioned in a room while directing at least some of said sound energy directly to a listener when said sound radiating Means is normally positioned in a room without reflection, and complementing means coacting with said sound radiating means for establishing an essentially uniform radiated power density spectral frequency response over substantially the entire audible frequency range for said loudspeaker system when said sound radiating means is normally positioned in a room.
Claim 38
Dependent Claim
137 words
A loudspeaker system having at least a rear panel for facing an adjacent wall and a front panel for facing the normal listening area when normally positioned in a room comprising, radiating means for directing most of the sound energy therefrom first across the plane of said rear panel, then said adjacent wall and then to a listener when said sound radiating means is normally positioned in a room while directing at least some of said sound energy directly to a listener when said sound radiating Means is normally positioned in a room without reflection, and complementing means coacting with said sound radiating means for establishing an essentially uniform radiated power density spectral frequency response over substantially the entire audible frequency range for said loudspeaker system when said sound radiating means is normally positioned in a room.
Claim 39
Dependent Claim
81 words
A loudspeaker system in accordance with claim 2 and further comprising a plurality of small loudspeakers comprising said upper frequency radiating means, means including said small loudspeakers and said loudspeaker cabinet enclosing said internal volume substantially fluidtight, first coupling means for energizing each small loudspeaker carried by said second means with first channel energy, and second coupling means for energizing each small loudspeaker carried by said third means with second channel energy that may be different than said first channel energy.
Claim 40
Dependent Claim
76 words
A loudspeaker system comprising, sound radiating means, and means for supporting said sound radiating means for directing of the order of 87 percent of the sound energy therefrom upon a reflecting surface and then to a listener when said sound radiating means is normally positioned in a room while directing of the order of 13 percent of the sound energy therefrom directly to a listener when said sound radiating means is normally positioned in a room.
Claim 41
Dependent Claim
76 words
A loudspeaker system comprising, sound radiating means, and means for supporting said sound radiating means for directing of the order of 87 percent of the sound energy therefrom upon a reflecting surface and then to a listener when said sound radiating means is normally positioned in a room while directing of the order of 13 percent of the sound energy therefrom directly to a listener when said sound radiating means is normally positioned in a room.
References Cited (Backward Citations)
US2256057A
Cited
US2610694A
Cited
US2544742A
Cited
US2710662A
Cited
US2689016A
Cited
US2915588A
Cited
US3026957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |