US3201529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic speaker
Assignee: Individual
•
Filing: 1962-11-16
•
Granted: 1965-08-17
•
Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
- 👤 Philip C Surh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:38
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R9/04; H04R9/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A DYNAMIC SPEAKER COMPRISING A FRAME, A MAGNET ASSEMBLY SUPPORTED FROM SAID FRAME, SAID MAGNET ASSEMBLY COMPRISING AXIALLY ALIGNED SPACED APART, MAGNETICALLY ISOLATED MAGNETS, A CYLINDRICAL VOICE COIL FORM SUPPORTED COAXIALLY ABOUT SAID MAGNET ASSEMBLY AND AXIALLY MOVABLE WITH RESPECT THERETO, A SUBSTANTIALLY CYLINDRICAL VOICE COIL ON SAID FORM, SAID VOICE COIL BEING OPERATIVELY POSITIONED ON SAID VOICE COIL FORM SUCH THAT CURRENT IN SAID COIL SETS UP A MAGNETIC FIELD OPPOSITELY DIRECTED WITH RESPECT TO ONE OF SAID MAGNETS AND SIMILARLY DIRECTED WITH RESPECT TO THE OTHER OF SAID MAGNETS, AND A DIAPHRAGM MOUNTED ON SAID VOICE VOIL FORM.
Claim 2
Dependent Claim
100 words
A DYNAMIC SPEAKER COMPRISING A FRAME, A MAGNET ASSEMBLY SUPPORTED FROM SAID FRAME, SAID MAGNET ASSEMBLY COMPRISING AXIALLY ALIGNED SPACED APART, MAGNETICALLY ISOLATED MAGNETS, A CYLINDRICAL VOICE COIL FORM SUPPORTED COAXIALLY ABOUT SAID MAGNET ASSEMBLY AND AXIALLY MOVABLE WITH RESPECT THERETO, A SUBSTANTIALLY CYLINDRICAL VOICE COIL ON SAID FORM, SAID VOICE COIL BEING OPERATIVELY POSITIONED ON SAID VOICE COIL FORM SUCH THAT CURRENT IN SAID COIL SETS UP A MAGNETIC FIELD OPPOSITELY DIRECTED WITH RESPECT TO ONE OF SAID MAGNETS AND SIMILARLY DIRECTED WITH RESPECT TO THE OTHER OF SAID MAGNETS, AND A DIAPHRAGM MOUNTED ON SAID VOICE VOIL FORM.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |