US3648801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound radiator
Assignee: Elektroakusztikai Gyar
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Filing: 1970-02-25
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Granted: 1972-03-14
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Expires: 1990-02-25
Abstract
Abstract A series of at least three loud speakers is set one in each of at least three walls forming alternately oppositely opening dihedral angles with each other. The center-to-center distance between the loud speakers is less than 10 times the wavelength of the upper limiting frequency of the sound frequency band. The loud speakers are excited by the same signal source, and a stronger interference field is produced than if the sound emanated from a planar or spherical surface.
Inventors
- 👤 Denes Huszty
- 👤 Andras Illenyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:21
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/323
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
122 words
A sound radiator comprising at least three loudspeakers excited by the same signal source and each having a flat front panel perpendicular to the radiating axis of the speaker, the panels being on a common level and meeting each other at angles substantially different from 180* along lines that are parallel to each other, a flat panel perpendicular to and below and common to all said front panels, said front panels meeting said perpendicular panel in a zigzag line, said axes of adjacent speakers intersecting each other alternately before and behind said zigzag line, adjacent speakers having radiating centers that are at a distance from each other less than 10 times the wave length of the upper limiting frequency of the speakers.
Claim 2
Dependent Claim
122 words
A sound radiator comprising at least three loudspeakers excited by the same signal source and each having a flat front panel perpendicular to the radiating axis of the speaker, the panels being on a common level and meeting each other at angles substantially different from 180* along lines that are parallel to each other, a flat panel perpendicular to and below and common to all said front panels, said front panels meeting said perpendicular panel in a zigzag line, said axes of adjacent speakers intersecting each other alternately before and behind said zigzag line, adjacent speakers having radiating centers that are at a distance from each other less than 10 times the wave length of the upper limiting frequency of the speakers.
Claim 3
Dependent Claim
49 words
A sound radiator as claimed in claim 1, and a second flat panel perpendicular to and above and common to all said front panels and parallel to the first-mentioned perpendicular panel, said front panels meeting said second perpendicular panel in a zigzag line congruent to the first-mentioned zigzag line.
References Cited (Backward Citations)
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US2544742A
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US2602860A
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US3179203A
Cited
US3241631A
Cited
US3449519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |