US3688864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infinite dynamic damping loudspeaker systems
Assignee: TALBOT AMERICAN CORP
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Filing: 1970-04-16
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Granted: 1972-09-05
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Expires: 1990-04-16
Abstract
Abstract An infinite dynamic damping loudspeaker system includes at least two similar loudspeakers which radiate from an enclosure in response to the simultaneous receipt of the same signals. The diaphragms of the loudspeakers are acoustically coupled by an air chamber and a tuning duct connects the air chamber to the atmosphere. The diaphragms vibrate in a phase such that they produce the same phase of pressure changes on the air in the chamber to provide mutual damping.
Inventors
- 👤 Reuben Guss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:22
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/26; H04R1/28; H04R1/2807; H04R1/2815; H04R1/2819
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
An infinite dynamic damping loudspeaker system occupying a minimum of space comprising: a multiwall enclosure; at least first and second substantially identical loudspeakers, each of said loudspeakers including a diaphragm and a motor, the motors of said loudspeakers being adapted to receive the same energizing signal so that the motors are energized electrically in phase; means for mounting said loudspeakers in said enclosure such that the axes of said speakers are orthogonal, the same one surface of each of said loudspeakers being acoustically coupled by an air chamber in such a way that the same movement of the diaphragms of each of the loudspeakers produces the same change of air pressure in the air chamber whereby each diaphragm damps the other diaphragm and said first loudspeaker directly radiates through an opening in the front wall of said enclosure; a tubular tuning duct inertance element extending inward from one of the walls of said enclosure for connecting the air chamber to the region outside said enclosure to minimize the size of said enclosure; a secondary chamber in said enclosure; and a port in said enclosure for connecting said secondary chamber to the region outside said enclosure, and said second loudspeaker radiating into said secondary chamber.
Claim 2
Dependent Claim
204 words
An infinite dynamic damping loudspeaker system occupying a minimum of space comprising: a multiwall enclosure; at least first and second substantially identical loudspeakers, each of said loudspeakers including a diaphragm and a motor, the motors of said loudspeakers being adapted to receive the same energizing signal so that the motors are energized electrically in phase; means for mounting said loudspeakers in said enclosure such that the axes of said speakers are orthogonal, the same one surface of each of said loudspeakers being acoustically coupled by an air chamber in such a way that the same movement of the diaphragms of each of the loudspeakers produces the same change of air pressure in the air chamber whereby each diaphragm damps the other diaphragm and said first loudspeaker directly radiates through an opening in the front wall of said enclosure; a tubular tuning duct inertance element extending inward from one of the walls of said enclosure for connecting the air chamber to the region outside said enclosure to minimize the size of said enclosure; a secondary chamber in said enclosure; and a port in said enclosure for connecting said secondary chamber to the region outside said enclosure, and said second loudspeaker radiating into said secondary chamber.
Claim 3
Dependent Claim
17 words
The loudspeaker system of claim 1 wherein said port is in the front wall of said enclosure.
Claim 4
Dependent Claim
17 words
The loudspeaker system of claim 1 wherein said port is in the rear wall of said enclosure.
Claim 5
Dependent Claim
156 words
An infinite dynamic damping loudspeaker system occupying a minimum of space comprising a multiwall enclosure divided into an air chamber and a sound chamber, said enclosure having ports for connecting said sound chamber to the region external to said enclosure, at least first and second substantially identical loudspeakers, each of said loudspeakers including a diaphragm and a motor, the motors of said loudspeakers being adapted to receive the same energizing signal so that the motors are energized electrically in phase, and means for mounting said loudspeakers in said enclosure such that the axes of said speakers are orthogonal, the same one surface of each of said loudspeakers are acoustically coupled by said air chamber in such a way that the same movement of the diaphragms of each of the loudspeakers produces the same change of air pressure in the air chamber whereby each diaphragm damps the other diaphragm, and said loudspeakers radiate into said sound chamber.
Claim 6
Dependent Claim
156 words
An infinite dynamic damping loudspeaker system occupying a minimum of space comprising a multiwall enclosure divided into an air chamber and a sound chamber, said enclosure having ports for connecting said sound chamber to the region external to said enclosure, at least first and second substantially identical loudspeakers, each of said loudspeakers including a diaphragm and a motor, the motors of said loudspeakers being adapted to receive the same energizing signal so that the motors are energized electrically in phase, and means for mounting said loudspeakers in said enclosure such that the axes of said speakers are orthogonal, the same one surface of each of said loudspeakers are acoustically coupled by said air chamber in such a way that the same movement of the diaphragms of each of the loudspeakers produces the same change of air pressure in the air chamber whereby each diaphragm damps the other diaphragm, and said loudspeakers radiate into said sound chamber.
Claim 7
Dependent Claim
9 words
The loudspeaker system of claim 4 comprising four loudspeakers.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |