US3371742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker enclosure
Assignee: Individual
•
Filing: 1965-10-21
•
Granted: 1968-03-05
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Desmond H Norton
- 👤 Martin A Hardin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:52
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
AN ACOUSTICAL ENCLOSURE FOR A LOUDSPEAKER COMPRISING AN ELONGATED HOLLOW BODY PORTION, A FIRST SOUNDING WALL CLOSING ONE END OF SAID HOLLOW BODY PORTION A LOUDSPEAKER HAVING AN OUTWARDLY FLARING SPEAKER CONE SUPPORTED BY SAID FIRST SOUNDING WALL INTERIOR OF SAID HOLLOW BODY PORTION IN REGISTRATION WITH A CENTRAL APERTURE IN SAID FIRST SOUNDING WALL, WHICH APERTURE IS SMALLER THAN THE DIAMETER OF THE SPEAKER CONE OF SAID LOUDSPEAKER, WHEREIN SAID SOUND WAVES ARE DIRECTED OUTWARDLY THROUGH SAID CENTRAL APERTURE, A SECOND SOUNDING WALL CLOSING THE OPPOSITE END OF SAID HOLLOW BODY PORTION AND HAVING A CENTRAL APERTURE, SMALLER THAN SAID APERTURE IN SAID FIRST SOUNDING WALL, AXIALLY ALIGNED WITH SAID LOUDSPEAKER AND THE CENTRAL APERTURE IN SAID FIRST SOUNDING WALL TO DIRECT SOUND WAVES FROM THE BACK OF THE SPEAKER CONE OUTWARDLY OF SAID HOLLOW BODY PORTION, AND A PAIR OF BAFFLE MEMBERS RESPECTIVELY CONNECTED IN OUTWARDLY SPACED RELATION WITH
Claim 2
Dependent Claim
151 words
AN ACOUSTICAL ENCLOSURE FOR A LOUDSPEAKER COMPRISING AN ELONGATED HOLLOW BODY PORTION, A FIRST SOUNDING WALL CLOSING ONE END OF SAID HOLLOW BODY PORTION A LOUDSPEAKER HAVING AN OUTWARDLY FLARING SPEAKER CONE SUPPORTED BY SAID FIRST SOUNDING WALL INTERIOR OF SAID HOLLOW BODY PORTION IN REGISTRATION WITH A CENTRAL APERTURE IN SAID FIRST SOUNDING WALL, WHICH APERTURE IS SMALLER THAN THE DIAMETER OF THE SPEAKER CONE OF SAID LOUDSPEAKER, WHEREIN SAID SOUND WAVES ARE DIRECTED OUTWARDLY THROUGH SAID CENTRAL APERTURE, A SECOND SOUNDING WALL CLOSING THE OPPOSITE END OF SAID HOLLOW BODY PORTION AND HAVING A CENTRAL APERTURE, SMALLER THAN SAID APERTURE IN SAID FIRST SOUNDING WALL, AXIALLY ALIGNED WITH SAID LOUDSPEAKER AND THE CENTRAL APERTURE IN SAID FIRST SOUNDING WALL TO DIRECT SOUND WAVES FROM THE BACK OF THE SPEAKER CONE OUTWARDLY OF SAID HOLLOW BODY PORTION, AND A PAIR OF BAFFLE MEMBERS RESPECTIVELY CONNECTED IN OUTWARDLY SPACED RELATION WITH
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |