US3631426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information storage system having master and redundant data on tape in turret supported cartridges
Assignee: Texas Instruments Inc
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Filing: 1969-12-29
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Granted: 1971-12-28
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Expires: 1989-12-29
Abstract
Abstract In a information storage system, a turret supports a plurality of cartridges which in turn enclose individual lengths of magnetic tape. The turret rotates the cartridges to an apparatus that selectively transfers the cartridges to an information recording/reproducing station. At the station, phase modulated data is simultaneously recorded along 32 master data tracks. At the same time, the same data is encoded and recorded along 32 redundant tracks. During reproduction, all 64 tracks are read simultaneously. Data from the master data tracks is selected unless a parity error occurs, whereupon data from the corresponding redundant track is used.
Inventors
- 👤 Daren R Appelt
- 👤 Granville E Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:15
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1803
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
An information storage system comprising: a turret, a plurality of cartridges in said turret, each cartridge including a length of magnetic tape, an information recording/reproducing station, said turret rotatably mounted for positioning selected cartridge at said information recording/reproducing station, an elevator at said information recording/reproducing station for moving said selected cartridge into alignment with said station, and means at said station for simultaneously recording data on and for simultaneously reproducing data from a plurality of master data tracks and a plurality of redundant data tracks.
Claim 2
Dependent Claim
85 words
An information storage system comprising: a turret, a plurality of cartridges in said turret, each cartridge including a length of magnetic tape, an information recording/reproducing station, said turret rotatably mounted for positioning selected cartridge at said information recording/reproducing station, an elevator at said information recording/reproducing station for moving said selected cartridge into alignment with said station, and means at said station for simultaneously recording data on and for simultaneously reproducing data from a plurality of master data tracks and a plurality of redundant data tracks.
Claim 3
Dependent Claim
22 words
The information storage system claimed in claim 1 having a suction cup for engaging said selected cartridge to move said selected cartridge.
Claim 4
Dependent Claim
41 words
The information storage system according to claim 1 wherein each redundant data track corresponds to a master data track and wherein the same data is simultaneously recorded on and reproduced from a master data track and the corresponding redundant data track.
Claim 5
Dependent Claim
38 words
The information storage system according to claim 3 further including means for encoding the data as it is recorded on the redundant data tracks and for decoding the data as it is reproduced from the redundant data tracks.
Claim 6
Dependent Claim
19 words
The information storage system according to claim 1 wherein the data is recorded in the form of self-clocking bits.
Claim 7
Dependent Claim
53 words
The information storage system according to claim 5 wherein the data is recorded in the form of multiple-bit data bytes and further including means for simultaneously recording each byte serially along a master data track and a redundant data track and for encoding each byte as it is recorded along a redundant track.
References Cited (Backward Citations)
US2813259A
Cited
US3525086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |