US3358084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic sound reproducer
Assignee: Individual
•
Filing: 1964-02-17
•
Granted: 1967-12-12
•
Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 William J Ashworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:49
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
AN ELECTROMAGNETIC SOUND REPRODUCER COMPRISING A DIAPHRAGM OF RESILIENT FLEXIBLE MATERIAL FOR IMPARTING SOUND IMPULSES INTO THE AMBIENT AIR, A PLATE OF MAGNETIC MATERIAL SECURED TO SAID DIAPHRAGM, AN ELECTROMAGNET HAVING AN IRON FRAME WITH A PRIMARY WINDING THEREON, SAID ELECTROMAGNET SPACED A PREDETERMINED DISTANCE FROM SAID PLATE FOR MAGNETIC ATTRACTION BETWEEN SAID PLATE AND SAID ELECTROMAGNET, MEANS OF SUPPORTING SAID DIAPHRAGM AND MEANS FOR HOLDING SAID ELECTROMAGNET IN A SPACED RELATION WITH SAID PLATE, WHEREIN THE SAID ELECTROMAGNET PROVIDES COUPLING MEANS FOR OPERATIVELY CONNECTING TO AT LEAST ONE AUXILIARY SOUND REPRODUCER, WHEREIN SAID ELECTROMAGNETIC SOUND REPRODUCER IMPARTS A PREDOMINANTLY LOWER FREQUENCY SOUND INTO THE AMBIENT AIR THAN SAID AUXILIARY SOUND REPRODUCER WHICH IMPARTS A PREDOMINANTLY HIGHER FREQUENCY SOUND INTO THE AMBIENT AIR THAN SAID ELECTROMAGNETIC SOUND REPRODUCER, WHEREIN AT LEAST ONE OF SAID AUXILIARY SOUND REPRODUCERS IS OF THE PREDOMINANTLY CAPACITIVE TYPE WITH MEANS FOR OPERATIVELY CONNECTING SAID ELECTROMAGNETIC SOUND REPRODUCER TO AN ENERGY SOURCE.
Claim 2
Dependent Claim
156 words
AN ELECTROMAGNETIC SOUND REPRODUCER COMPRISING A DIAPHRAGM OF RESILIENT FLEXIBLE MATERIAL FOR IMPARTING SOUND IMPULSES INTO THE AMBIENT AIR, A PLATE OF MAGNETIC MATERIAL SECURED TO SAID DIAPHRAGM, AN ELECTROMAGNET HAVING AN IRON FRAME WITH A PRIMARY WINDING THEREON, SAID ELECTROMAGNET SPACED A PREDETERMINED DISTANCE FROM SAID PLATE FOR MAGNETIC ATTRACTION BETWEEN SAID PLATE AND SAID ELECTROMAGNET, MEANS OF SUPPORTING SAID DIAPHRAGM AND MEANS FOR HOLDING SAID ELECTROMAGNET IN A SPACED RELATION WITH SAID PLATE, WHEREIN THE SAID ELECTROMAGNET PROVIDES COUPLING MEANS FOR OPERATIVELY CONNECTING TO AT LEAST ONE AUXILIARY SOUND REPRODUCER, WHEREIN SAID ELECTROMAGNETIC SOUND REPRODUCER IMPARTS A PREDOMINANTLY LOWER FREQUENCY SOUND INTO THE AMBIENT AIR THAN SAID AUXILIARY SOUND REPRODUCER WHICH IMPARTS A PREDOMINANTLY HIGHER FREQUENCY SOUND INTO THE AMBIENT AIR THAN SAID ELECTROMAGNETIC SOUND REPRODUCER, WHEREIN AT LEAST ONE OF SAID AUXILIARY SOUND REPRODUCERS IS OF THE PREDOMINANTLY CAPACITIVE TYPE WITH MEANS FOR OPERATIVELY CONNECTING SAID ELECTROMAGNETIC SOUND REPRODUCER TO AN ENERGY SOURCE.
References Cited (Backward Citations)
US2787786A
Cited
US3092693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |