US3219988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording device
Assignee: Bunker Ramo Corp
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Filing: 1961-02-01
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Granted: 1965-11-23
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Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 George P Miller
- 👤 Benny J Terracciano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/40; G11B5/48; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A MAGNETIC HEAD MOUNTING DEVICE FOR HOLDING MAGNETIC HEADS IN A CLOSE NON-CONTACTING RELATION TO A MAGNETIC DRUM, INCLUDING A FRAME POSITIONED ADJACENT THE DRUM, THE FRAME INCLUDING V-GROOVE SURFACES EXTENDING PARALLEL TO THE AXIS OF ROTATION OF THE DRUM, RADIUS ARM MEANS LYING IN A PLANE NORMAL TO THE AXIS OF ROTATION OF THE DRUM AND SPACED APART FROM THE DRUM, BEARING MEANS COUPLED AT A FIRST END OF THE RADIUS ARM MEANS AND REGISTERING IN TH V-GROOVE SURFACES, TO PERMIT THE RADIUS ARM MEANS TO PIVOT ABOUT THE V-GROOVE SURFACES, SHOE SUPPORT MEANS POSITIONED IN A CENTRAL PART OF THE RADIUS ARM MEANS AND EXTENDING PARALLEL TO THE AXIS OF ROTATION OF THE DRUM, A MAGNETIC HEAD SUPPORT SHOE COUPLED TO THE SHOE SUPPORT MEANS, THE MAGNETIC HEAD SUPPORT SHOE HAVING A SMOOTH CONCAVE SURFACE FACING AND SUBSTANTIALLY MATING WITH THE SURFACE OF THE DWRUM, SPRING MEANS COUPLED TO THE FRAME AND ENGAGING THE RADIUS ARM MEANS BETWEEN THE BEARING MEANS AND THE SHOE SUPPORT MEANS, THE SPRING MEANS URGING THE RADIUS ARM MEANS TOWARD THE DRUM WITH SELECTED FORCE AND UNIFORMLY WITH RESPECT TO THE AXIS OF THE DRUM, AND CAM MEANS DISPOSED ADJACENT THE SECOND END OF THE SUPPORT ARM MEANS FOR SELECTIVELY PIVOTING THE SUPPORT ARM MEANS AWAY FROM THE DRUM.
Claim 2
Dependent Claim
216 words
A MAGNETIC HEAD MOUNTING DEVICE FOR HOLDING MAGNETIC HEADS IN A CLOSE NON-CONTACTING RELATION TO A MAGNETIC DRUM, INCLUDING A FRAME POSITIONED ADJACENT THE DRUM, THE FRAME INCLUDING V-GROOVE SURFACES EXTENDING PARALLEL TO THE AXIS OF ROTATION OF THE DRUM, RADIUS ARM MEANS LYING IN A PLANE NORMAL TO THE AXIS OF ROTATION OF THE DRUM AND SPACED APART FROM THE DRUM, BEARING MEANS COUPLED AT A FIRST END OF THE RADIUS ARM MEANS AND REGISTERING IN TH V-GROOVE SURFACES, TO PERMIT THE RADIUS ARM MEANS TO PIVOT ABOUT THE V-GROOVE SURFACES, SHOE SUPPORT MEANS POSITIONED IN A CENTRAL PART OF THE RADIUS ARM MEANS AND EXTENDING PARALLEL TO THE AXIS OF ROTATION OF THE DRUM, A MAGNETIC HEAD SUPPORT SHOE COUPLED TO THE SHOE SUPPORT MEANS, THE MAGNETIC HEAD SUPPORT SHOE HAVING A SMOOTH CONCAVE SURFACE FACING AND SUBSTANTIALLY MATING WITH THE SURFACE OF THE DWRUM, SPRING MEANS COUPLED TO THE FRAME AND ENGAGING THE RADIUS ARM MEANS BETWEEN THE BEARING MEANS AND THE SHOE SUPPORT MEANS, THE SPRING MEANS URGING THE RADIUS ARM MEANS TOWARD THE DRUM WITH SELECTED FORCE AND UNIFORMLY WITH RESPECT TO THE AXIS OF THE DRUM, AND CAM MEANS DISPOSED ADJACENT THE SECOND END OF THE SUPPORT ARM MEANS FOR SELECTIVELY PIVOTING THE SUPPORT ARM MEANS AWAY FROM THE DRUM.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |