US3356796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field case assembly for loudspeaker
Assignee: Motors Liquidation Co
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Filing: 1964-08-11
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Granted: 1967-12-05
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Expires: 1984-08-11
Abstract
No abstract record available.
Inventors
- 👤 Shirl D Wray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A TRANSDUCER FOR CONVERTING ELECTRICAL TO MECHANICAL WAVES COMPRISING A PERMANENT MAGENT ASSEMBLY HAVING AN ANNULAR OPENING IN ONE FACE, A VIBRATABLE DIAPHRAGM, A DRIVING COIL SECURED TO THE DIAPHRAGM AND EXTENDING FROM ONE SIDE THEREOF, A METALLIC SUPPORTING FRAME HAVING A CYLINDRICAL PORTION OF PROPER SIZE FOR ACCOMMODATING THE PERMANENT MAGNET ASSEMBLY WITH ONE END OPEN FOR THE INSERTION THEREOF WHICH IS CAPABLE OF BEING DEFORMED AROUND THE END OF THE PERMANENT MAGNET ASSEMBLY TO TIGHTLY CLAMP IT IN PLACE WITHOUT THE USE OF ANY OTHER MEANS, SAID VARIABLE DIAPHRAGM BEING SUPPORTED IN THE OPPOSITE END OF THE METALLIC SUPPORTING FRAME WITH THE DRIVING COIL FACING THE PERMANENT MAGNET ASSEMBLY WHICH HAS THE ANNULAR OPENING IN THE SIDE TO ACCOMMODATE SAID DRIVING COIL.
Claim 2
Dependent Claim
124 words
A TRANSDUCER FOR CONVERTING ELECTRICAL TO MECHANICAL WAVES COMPRISING A PERMANENT MAGENT ASSEMBLY HAVING AN ANNULAR OPENING IN ONE FACE, A VIBRATABLE DIAPHRAGM, A DRIVING COIL SECURED TO THE DIAPHRAGM AND EXTENDING FROM ONE SIDE THEREOF, A METALLIC SUPPORTING FRAME HAVING A CYLINDRICAL PORTION OF PROPER SIZE FOR ACCOMMODATING THE PERMANENT MAGNET ASSEMBLY WITH ONE END OPEN FOR THE INSERTION THEREOF WHICH IS CAPABLE OF BEING DEFORMED AROUND THE END OF THE PERMANENT MAGNET ASSEMBLY TO TIGHTLY CLAMP IT IN PLACE WITHOUT THE USE OF ANY OTHER MEANS, SAID VARIABLE DIAPHRAGM BEING SUPPORTED IN THE OPPOSITE END OF THE METALLIC SUPPORTING FRAME WITH THE DRIVING COIL FACING THE PERMANENT MAGNET ASSEMBLY WHICH HAS THE ANNULAR OPENING IN THE SIDE TO ACCOMMODATE SAID DRIVING COIL.
References Cited (Backward Citations)
US2623254A
Cited
US3293379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |