Patent US3319201A successfully refreshed from Google Patents.
US3319201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unitary field structure for magnetic loudspeaker
Assignee: Individual
•
Filing: 1965-06-10
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Granted: 1967-05-09
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Expires: 1985-06-10
Abstract
No abstract record available.
Inventors
- 👤 Aldo L Coen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:17
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R31/00; H04R2209/00; H04R2209/024; H04R31/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN INTEGRAL, ONE-PIECE SPEAKER POT FOR USE WITH THE FIELD STRUCTURE IN THE MAGNETIC CIRCUIT OF A LOUDSPEAKER, SAID SPEAKER POT COMPRISING A ONE-PIECE HOMOGENOUS CUP-LIKE STRUCTURE OF SUBSTANTIALLY UNIFORM WALL THICKNESS HAVING A CLOSED BOTTOM AND A CYLINDRICAL SIDE WALL, AN INWARDLY EXTENDING ANNULAR FLANGE-LIKE FORMATION ON THE UPPER END OF SAID CUP-LIKE STRUCTURE WHICH IS A UNITARY PART THEREOF, SAID INWARDLY EXTENDING PORTION HAVING AN OPENING THEREIN WHICH DEFINES A CYLINDRICAL SURFACE, THE DIAMETER OF WHICH IS SUBSTANTIALLY LESS THAN INNER DIAMETER OF THE CYLINDRICAL SIDE WALL, SAID CYLINDRICAL SURFACE BEING ADAPTED, UPON THE MOUNTING OF A MAGNET IN SAID CUP-LIKE STRUCTURE, TO COOPERATE THEREWITH TO DEFINE AN ANNULAR AIR GAP FOR THE SAID MAGNETIC CIRCUIT, AND A SEAT IN THE INTERIOR OF SAID CUP-LIKE STRUCTURE FOR SUPPORTING SAID MAGNET.
Claim 2
Dependent Claim
132 words
AN INTEGRAL, ONE-PIECE SPEAKER POT FOR USE WITH THE FIELD STRUCTURE IN THE MAGNETIC CIRCUIT OF A LOUDSPEAKER, SAID SPEAKER POT COMPRISING A ONE-PIECE HOMOGENOUS CUP-LIKE STRUCTURE OF SUBSTANTIALLY UNIFORM WALL THICKNESS HAVING A CLOSED BOTTOM AND A CYLINDRICAL SIDE WALL, AN INWARDLY EXTENDING ANNULAR FLANGE-LIKE FORMATION ON THE UPPER END OF SAID CUP-LIKE STRUCTURE WHICH IS A UNITARY PART THEREOF, SAID INWARDLY EXTENDING PORTION HAVING AN OPENING THEREIN WHICH DEFINES A CYLINDRICAL SURFACE, THE DIAMETER OF WHICH IS SUBSTANTIALLY LESS THAN INNER DIAMETER OF THE CYLINDRICAL SIDE WALL, SAID CYLINDRICAL SURFACE BEING ADAPTED, UPON THE MOUNTING OF A MAGNET IN SAID CUP-LIKE STRUCTURE, TO COOPERATE THEREWITH TO DEFINE AN ANNULAR AIR GAP FOR THE SAID MAGNETIC CIRCUIT, AND A SEAT IN THE INTERIOR OF SAID CUP-LIKE STRUCTURE FOR SUPPORTING SAID MAGNET.
References Cited (Backward Citations)
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Cited
US2551949A
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US2533498A
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US2974204A
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US2964597A
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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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |