US3292935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone arm for gramophone
Assignee: Decca Ltd
•
Filing: 1963-07-29
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Granted: 1966-12-20
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Cooper Margaret Joan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:11
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/10; G11B3/12; G11B3/28; G11B3/34; G11B3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A TONE ARM AND MOUNTING THEREFOR FOR REPRODUCING SOUND FROM DISC RECORDS COMPRISING A PIVOT FOR HORIZONTAL ROTATION OF THE TONE ARM OVER THE SURFACE OF A RECORD, A PREMANENT MAGNET FIXED TO THE TONE ARM SYMMETRICALLY ABOUT SAID PIVOT AND PERMANENT MAGNET MEANS FIXED TO THE MOUNTING FOR SAID TONE ARM SYMMETRICALLY ABOUT SAID PIVOT, THE MAGNETIC FORCE BETWEEN THE SAID PERMANENT MAGNET AND SAID PERMANENT MAGNET MEANS TENDING TO ROTATE SAID TONE ARM ABOUT SAID PIVOT IN A DIRECTION OPPOSED TO THE DIRECTION OF ROTATION OF SAID TONE ARM WHEN REPRODUCING FROM A RECORD.
Claim 2
Dependent Claim
96 words
A TONE ARM AND MOUNTING THEREFOR FOR REPRODUCING SOUND FROM DISC RECORDS COMPRISING A PIVOT FOR HORIZONTAL ROTATION OF THE TONE ARM OVER THE SURFACE OF A RECORD, A PREMANENT MAGNET FIXED TO THE TONE ARM SYMMETRICALLY ABOUT SAID PIVOT AND PERMANENT MAGNET MEANS FIXED TO THE MOUNTING FOR SAID TONE ARM SYMMETRICALLY ABOUT SAID PIVOT, THE MAGNETIC FORCE BETWEEN THE SAID PERMANENT MAGNET AND SAID PERMANENT MAGNET MEANS TENDING TO ROTATE SAID TONE ARM ABOUT SAID PIVOT IN A DIRECTION OPPOSED TO THE DIRECTION OF ROTATION OF SAID TONE ARM WHEN REPRODUCING FROM A RECORD.
References Cited (Backward Citations)
US1866403A
Cited
US2277344A
Cited
US2647753A
Cited
FR1084964A
Cited
FR1243023A
Cited
US3088742A
Cited
US3156472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |