US3349385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating transducer in a random access system
Assignee: Ampex Corp
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Filing: 1965-04-14
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Granted: 1967-10-24
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Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Clarence K Studley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:40
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53; G11B5/531
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A MEMORY SYSTEM COMPRISING A MAGNETIC RECORD PLAQUE, DRUM MEANS HAVING A CIRCUMFERENTIAL REGION BOUNDED AT AT LEAST ONE END BY A PLANE LOCATED ADJACENT SAID PLAQUE, A PLURALITY OF TRANSDUCERS MOUNTED ON SAID PLANE OF SAID DRUM MEANS ON A PLURALITY OF DIFFERENT RADIALLY OFFSET CONCENTRIC CIRCLES THEREOF, MEANS FOR ROTATING SAID DRUM MEANS AT A HIGH SPEED, AND MEANS FOR POSITIONING SAID PLAQUE TO SELECTED STATIONARY POSITIONS RELATIVE TO SAID TRANSDUCERS, WHEREBY INFORMATION MAY BE RAPIDLY RECORDED ON AND READ OUT FROM A PLURALITY OF TRACKS OF SAID PLAQUE DURING EACH REVOLUTION OF SAID DRUM MEANS.
Claim 2
Dependent Claim
98 words
A MEMORY SYSTEM COMPRISING A MAGNETIC RECORD PLAQUE, DRUM MEANS HAVING A CIRCUMFERENTIAL REGION BOUNDED AT AT LEAST ONE END BY A PLANE LOCATED ADJACENT SAID PLAQUE, A PLURALITY OF TRANSDUCERS MOUNTED ON SAID PLANE OF SAID DRUM MEANS ON A PLURALITY OF DIFFERENT RADIALLY OFFSET CONCENTRIC CIRCLES THEREOF, MEANS FOR ROTATING SAID DRUM MEANS AT A HIGH SPEED, AND MEANS FOR POSITIONING SAID PLAQUE TO SELECTED STATIONARY POSITIONS RELATIVE TO SAID TRANSDUCERS, WHEREBY INFORMATION MAY BE RAPIDLY RECORDED ON AND READ OUT FROM A PLURALITY OF TRACKS OF SAID PLAQUE DURING EACH REVOLUTION OF SAID DRUM MEANS.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |