US3166147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker system
Assignee: Individual
•
Filing: 1962-12-20
•
Granted: 1965-01-19
•
Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Daniel K Greenfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:47
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/04; H04R5/02; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2815; H04R1/2819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A MULTIPLE SOUND SOURCE LOUDSPEAKER SYSTEM COMPRISING A CENTRAL SOUND SOURCE AND A PAIR OF FLANKING SOUND SOURCES SPACED LATERALLY ON OPPOSITE SIDES OF SAID VENTRAL SOUND SOURCE, EACH OF SAID SOUND SOURCES POSITIONED TO DIRECT THE SOUND WAVE OUTPUT THEREFROM AWAY FROM THE LISTENING AREA DIRECTLY TOWARD A COMMON ACOUSTICAL REFLECTING SURFACE LOCATED CLOSELY ADJACENT TO ALL OF SAID SOUND SOURCES, THE ACOUSTICAL SOUND WAVES FROM EACH SOURCE DIFFUSING RADIALLY OUTWARD THEREFROM ALONG THE REFLECTING SURFACE AND MERGING IN AN OVERLAPPING PATTERN WITH THE SOUND WAVES FROM EACH OF THE OTHER SOURCES IN THE PLANE OF THE REFLECTING SURFACE TO FORM AN INTEGRATED WAVEFRONT, WHICH WAVEFRONT IS REFLECTED OUTWARD INTO THE LISTENING AREA, WHEREIN EACH OF SAID FLANKING SOUND SOURCES COMPRISES A LOUDSPEAKER POSITIONED TO FACE SAID COMMON REFLECTING SURFACE AND HOUSED IN AN ENCLOSURE HAVING A REFLECTING BAFFLE PLATE SECURED THERETO, SAID BAFFLE BEING DISPOSED IN FRONT OF THE CONE OF SAID LOUDSPEAKER AT AN ANGLE TO THE CONE AXIS, WHEREBY THE SOUND WAVE PRODUCED BY SAID LOUDSPEAKER ARE DIRECTED TOWARD AND REFLECTED OUTWARD FROM SAID BAFFLE ALONG SAID COMMON REFLECTING SURFACE.
Claim 2
Dependent Claim
184 words
A MULTIPLE SOUND SOURCE LOUDSPEAKER SYSTEM COMPRISING A CENTRAL SOUND SOURCE AND A PAIR OF FLANKING SOUND SOURCES SPACED LATERALLY ON OPPOSITE SIDES OF SAID VENTRAL SOUND SOURCE, EACH OF SAID SOUND SOURCES POSITIONED TO DIRECT THE SOUND WAVE OUTPUT THEREFROM AWAY FROM THE LISTENING AREA DIRECTLY TOWARD A COMMON ACOUSTICAL REFLECTING SURFACE LOCATED CLOSELY ADJACENT TO ALL OF SAID SOUND SOURCES, THE ACOUSTICAL SOUND WAVES FROM EACH SOURCE DIFFUSING RADIALLY OUTWARD THEREFROM ALONG THE REFLECTING SURFACE AND MERGING IN AN OVERLAPPING PATTERN WITH THE SOUND WAVES FROM EACH OF THE OTHER SOURCES IN THE PLANE OF THE REFLECTING SURFACE TO FORM AN INTEGRATED WAVEFRONT, WHICH WAVEFRONT IS REFLECTED OUTWARD INTO THE LISTENING AREA, WHEREIN EACH OF SAID FLANKING SOUND SOURCES COMPRISES A LOUDSPEAKER POSITIONED TO FACE SAID COMMON REFLECTING SURFACE AND HOUSED IN AN ENCLOSURE HAVING A REFLECTING BAFFLE PLATE SECURED THERETO, SAID BAFFLE BEING DISPOSED IN FRONT OF THE CONE OF SAID LOUDSPEAKER AT AN ANGLE TO THE CONE AXIS, WHEREBY THE SOUND WAVE PRODUCED BY SAID LOUDSPEAKER ARE DIRECTED TOWARD AND REFLECTED OUTWARD FROM SAID BAFFLE ALONG SAID COMMON REFLECTING SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |