US3248737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-stabilizing mechanical system
Assignee: Unisys Corp
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Filing: 1961-05-10
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Granted: 1966-04-26
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Expires: 1981-05-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter S Thomas
- 👤 David G Adler
- 👤 Raymond J Stankiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:11
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
AN AERODYNAMICALLY STABILIZED MAGNETIC RECORDING SYSTEM COMPRISING IN COMBINATION: A TRANSDUCER-HEAD STATIONARY MOUNTING MEANS; A MAGNETIZABLE RECORDING DISC, FORMED OF RIGID MATERIAL TO PREVENT ANY VIBRATING MOVEMENT WHEN ROTATED AND DISPOSED SUBSTANTIALLY PARALLEL TO SAID MOUNTING MEANS AND IN CLOSE PROXIMITY THERETO, THEREBY FORMING AN INTERSPACE THEREBETWEEN WHEN SAID MAGNETIZABLE RECORDING DISC IS AT REST; MOTOR MEANS CONNECTED TO SAID RECORDING DISC TO ROTATE SAID DISC ABOUT ITS AXIS AT A RELATIVELY HIGH SPEED THEREBY IMPARTING RADIAL MOVEMENT TO THE AIR IN SAID INTERSPACE THUS CAUSING A PRESSURE DIFFERENTIAL BETWEEN THE AIR IN SAID INTERSPACE AND THE ATMOSPHERE SURROUNDING SAID DISC WHEREBY SAID DISC IS URGED TOWARD SAID TRANSDUCER-HEAD MOUNTING MEANS; AND SUBSTANTIALLY FRICTIONLESS SUPPORTING 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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |