US3090626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable storage disc
Assignee: Unisys Corp
•
Filing: 1960-10-03
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Granted: 1963-05-21
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Expires: 1980-10-03
Abstract
Abstract 920,729. Magnetic disc record apparatus. SPERRY RAND CORPORATION. Sept. 25, 1961 [Oct. 3, 1960], No. 34251/61. Class 40 (2). In a data processing and storage system magnetic disc records are mounted on bi - stable belleville spring hubs or on spring spokes, which allow each disc two operative positions. The discs may be separated at any point for the insertion of a movable transducer 18 by a movable fluid jet 17.
Inventors
- 👤 Walter G Wadey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:49
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B17/00; G11B17/02; G11B17/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A BISTABLE STORAGE DEVICE COMPRISING: A RECORDING DISC; MOUNTING MEANS; AND NORMALLY STRESSED RESILIENT MEANS CONNECTED BETWEEN SAID MOUNTING MEANS AND SAID RECORDING DISC FOR NORMALLY HOLDING SAID RECORDING DISC IN AN AXIALLY DISPLACED POSITION WITH RESPECT TO SAID MOUNTING MEANS.
Claim 2
Dependent Claim
41 words
A BISTABLE STORAGE DEVICE COMPRISING: A RECORDING DISC; MOUNTING MEANS; AND NORMALLY STRESSED RESILIENT MEANS CONNECTED BETWEEN SAID MOUNTING MEANS AND SAID RECORDING DISC FOR NORMALLY HOLDING SAID RECORDING DISC IN AN AXIALLY DISPLACED POSITION WITH RESPECT TO SAID MOUNTING MEANS.
References Cited (Backward Citations)
US2617655A
Cited
US2802670A
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 |