US3090461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical sound reproducing devices
Assignee: Individual
•
Filing: 1957-08-14
•
Granted: 1963-05-21
•
Expires: 1977-08-14
Abstract
No abstract record available.
Inventors
- 👤 Vivian C Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:39
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2838; H04R1/2846; H04R1/2849; H04R1/2869; H04R1/2884; H04R1/2888
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN ELECTRICAL SOUND REPRODUCING DEVICE COMPRISING TWO SUBSTANTIALLY PARALLEL OPPOSED WALLS OF THIN RESILIENT MATERIAL, SAID WALLS BEING SMOOTHLY AND OPPOSITELY CURVED AND OF INFLECTED CONTOUR AND BEING SPACED APART BY A DISTANCE LESS THAN THEIR SUPERFICIAL DIMENSIONS TO PROVIDE AN ACOUSTICAL CHAMBER EXTENDING THEREBETWEEN OPEN SUBSTANTIALLY THROUGHOUT ITS PERIPHERY, MEANS SUPPORTING SAID WALLS OVER A SMALL PORTION OF THEIR PERIPHERAL EDGES, THE GREATER PORTION OF SAID PERIPHERAL EDGES BEING UNATTACHED AND FREE TO VIBRATE, STRUT AND TIE MEMBERS EXTENDING BETWEEN SAID WALLS AT POINTS SPACED FROM SAID SUPPORTING MEANS FOR PRESTRESSING SAID WALLS, THEREBY SUBSTANTIALLY ELIMINATING SPURIOUS VIBRATIONS IN USE, AND AN ELECTRICALLY OPERATED MOTION PRODUCING MEANS POSITIONED BETWEEN SAID WALLS AND SUPPORTED THEREFROM FOR SETTING THE WALLS INV VIBRATION.
Claim 2
Dependent Claim
121 words
AN ELECTRICAL SOUND REPRODUCING DEVICE COMPRISING TWO SUBSTANTIALLY PARALLEL OPPOSED WALLS OF THIN RESILIENT MATERIAL, SAID WALLS BEING SMOOTHLY AND OPPOSITELY CURVED AND OF INFLECTED CONTOUR AND BEING SPACED APART BY A DISTANCE LESS THAN THEIR SUPERFICIAL DIMENSIONS TO PROVIDE AN ACOUSTICAL CHAMBER EXTENDING THEREBETWEEN OPEN SUBSTANTIALLY THROUGHOUT ITS PERIPHERY, MEANS SUPPORTING SAID WALLS OVER A SMALL PORTION OF THEIR PERIPHERAL EDGES, THE GREATER PORTION OF SAID PERIPHERAL EDGES BEING UNATTACHED AND FREE TO VIBRATE, STRUT AND TIE MEMBERS EXTENDING BETWEEN SAID WALLS AT POINTS SPACED FROM SAID SUPPORTING MEANS FOR PRESTRESSING SAID WALLS, THEREBY SUBSTANTIALLY ELIMINATING SPURIOUS VIBRATIONS IN USE, AND AN ELECTRICALLY OPERATED MOTION PRODUCING MEANS POSITIONED BETWEEN SAID WALLS AND SUPPORTED THEREFROM FOR SETTING THE WALLS INV VIBRATION.
References Cited (Backward Citations)
US1642124A
Cited
US1667251A
Cited
US1628230A
Cited
US1763055A
Cited
US1885308A
Cited
GB314889A
Cited
US1923870A
Cited
US2820526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |