Patent US3266025A successfully refreshed from Google Patents.
US3266025A
Expired / Lapsed
US
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Magnetic recording head with spinning for readout
Assignee: Control Data Corp
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Filing: 1961-10-26
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Granted: 1966-08-09
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Rabinow Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:30
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A MAGNETIC RECORD PLAYBACK SYSTEM WHICH INCLUDES A MAGNETIC RECORD HAVING A PLURALITY OF ADJACENT BINARY BITS RECORDED THEREON, A TRANSDUCING HEAD HAVING A GAP LOCATED ADJACENT TO THE RECORD, MEANS FOR ROTATING SAID HEAD ABOUT AN AXIS PASSING THROUGH SAID GAP AND THROUGH ONE OF SAID BIT WHEN SAID RECORD IS AT REST TO SUCCESSIVELY MAGNETICALLY COUPLE AN DECOUPLE THE HEAD WITH ONE OF SAID BINARY BITS AND THEREBY INDUCE A SIGNAL IN SAID HEAD CORRESPONDING TO THE POLARITY OF THE RECORDED BINARY BIT, AND MEANS FOR CONDUCTING SAID INDUCED SIGNAL FROM SAID HEAD DURING ONLY PORTIONS OF THE REVOLUTIONS OF SAID HEAD TO THEREBY ELIMINATE CROSS TALK ORIGINATING FROM BITS ADJACENT TO THE BIT CONFRONTING SAID GAP.
Claim 2
Dependent Claim
120 words
IN A MAGNETIC RECORD PLAYBACK SYSTEM WHICH INCLUDES A MAGNETIC RECORD HAVING A PLURALITY OF ADJACENT BINARY BITS RECORDED THEREON, A TRANSDUCING HEAD HAVING A GAP LOCATED ADJACENT TO THE RECORD, MEANS FOR ROTATING SAID HEAD ABOUT AN AXIS PASSING THROUGH SAID GAP AND THROUGH ONE OF SAID BIT WHEN SAID RECORD IS AT REST TO SUCCESSIVELY MAGNETICALLY COUPLE AN DECOUPLE THE HEAD WITH ONE OF SAID BINARY BITS AND THEREBY INDUCE A SIGNAL IN SAID HEAD CORRESPONDING TO THE POLARITY OF THE RECORDED BINARY BIT, AND MEANS FOR CONDUCTING SAID INDUCED SIGNAL FROM SAID HEAD DURING ONLY PORTIONS OF THE REVOLUTIONS OF SAID HEAD TO THEREBY ELIMINATE CROSS TALK ORIGINATING FROM BITS ADJACENT TO THE BIT CONFRONTING SAID GAP.
References Cited (Backward Citations)
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Cited
US2772328A
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US2832840A
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US2914746A
Cited
US3012233A
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US3086089A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |