Patent US3562723A successfully refreshed from Google Patents.
US3562723A
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Tape skew correction circuitry
Assignee: Unisys Corp
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Filing: 1967-09-18
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Granted: 1971-02-09
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Expires: 1987-09-18
Abstract
Abstract IN A MULTIPLE CHANNEL TAPE HANDLING SYSTEM, THE SKEW ERROR ATTRIBUTABLE TO AZIMUTH MISALIGNMENT OF THE TAPE IS CORRECTED BY INTRODUCING PROPORTIONAL VARIABLE TIME DELAYS INDIVIDUAL TO THE CHANNELS. THE SKEW ERROR ATTRIBUTABLE TO GAP SCATTER OF THE READ HEAD IS CORRECTED BY INTRODUCING FIXED TIME DELAYS INDIVIDUAL TO THE CHANNELS. SPECIFICALLY, FIXED RESISTORS INDIVIDUAL TO THE CHANNELS ON THE TAPE DETERMINE THE GAP SCATTER CORRECTION AND A SINGLE VARIABLE RESISTOR DETERMINES THE AZIMUTH CORRECTION.
Inventors
- 👤 Michael I Behr
- 👤 Robert A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:35
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |