US3263031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-low frequency homing
Assignee: Unisys Corp
•
Filing: 1962-05-29
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Granted: 1966-07-26
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Expires: 1982-05-29
Abstract
No abstract record available.
Inventors
- 👤 Welsh Herbert Frazer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:47
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A DEVICE FOR PROPERLY ALIGNING A SENSING HEAD WITH A MAGNETIC RECORDING VHANNEL COMPRISING A FIRST TRACK PLACED ADJACENT TO ONE EDGE OF SAID MAGNETIC RECORDING CHANNEL AND HAVING PERMANENTLY RECORDED THEREIN A FIRST SERIES OF SIGNALS; A SECOND TRACK PLACED ADJACENT TO THE OTHER EDGE OF SAID MAGNETIC RECORDING CHANNEL AND HAVING PERMANENTLY RECORD THEREIN A SECOND SERIES OF SIGNALS; MEANS TO SENSE SAID FIRST AND SECOND TRACKS AND PRODUCE AN OUTPUT SIGNAL IN ACCORDANCE WITH THE RELATIVE STRENGTHS OF THE SIGNALS OF SAID FIRST AND SECOND TRACKS DUE TO THE POSITION OF THE SENSING HEAD; AND MEANS RESPONSIVE TO SAID OUTPUT SIGNAL TO PROVIDE FURTHER SIGNAL INDICATIVE OF THE DIRECTION AND MAGNITUDE OF ANY MISALIGNMENT OF SAID SENSING HEAD WITH RESPECT TO A MAGNETIC RECORDING CHANNEL WHEREBY SAID FURTHER SIGNALS MAY BE EMPLOYED TO CONTROL THE MOVEMENT OF SAID SENSING HEAD TO A POSITION AL ALIGNMENT WITH SAID MAGNETIC RECORDING CHANNEL.
Claim 2
Independent Claim
153 words
A DEVICE FOR PROPERLY ALIGNING A SENSING HEAD WITH A MAGNETIC RECORDING VHANNEL COMPRISING A FIRST TRACK PLACED ADJACENT TO ONE EDGE OF SAID MAGNETIC RECORDING CHANNEL AND HAVING PERMANENTLY RECORDED THEREIN A FIRST SERIES OF SIGNALS; A SECOND TRACK PLACED ADJACENT TO THE OTHER EDGE OF SAID MAGNETIC RECORDING CHANNEL AND HAVING PERMANENTLY RECORD THEREIN A SECOND SERIES OF SIGNALS; MEANS TO SENSE SAID FIRST AND SECOND TRACKS AND PRODUCE AN OUTPUT SIGNAL IN ACCORDANCE WITH THE RELATIVE STRENGTHS OF THE SIGNALS OF SAID FIRST AND SECOND TRACKS DUE TO THE POSITION OF THE SENSING HEAD; AND MEANS RESPONSIVE TO SAID OUTPUT SIGNAL TO PROVIDE FURTHER SIGNAL INDICATIVE OF THE DIRECTION AND MAGNITUDE OF ANY MISALIGNMENT OF SAID SENSING HEAD WITH RESPECT TO A MAGNETIC RECORDING CHANNEL WHEREBY SAID FURTHER SIGNALS MAY BE EMPLOYED TO CONTROL THE MOVEMENT OF SAID SENSING HEAD TO A POSITION AL ALIGNMENT WITH SAID MAGNETIC RECORDING CHANNEL.
References Cited (Backward Citations)
GB762699A
Cited
US3185972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |