US3270328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for thermally setting and controlling the gaps of non-contact readout elements
Assignee: Bunker Ramo Corp
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Filing: 1962-08-14
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Granted: 1966-08-30
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Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Harold J Mccreary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/004; G11B23/00; G11B23/02; G11B23/021; G11B5/48; G11B5/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A MAGNETIC RECORDING APPARATUS HAVING A ROTATABLE RECORDING MEDIUM SUPPORT, AT LEAST ONE MAGNETIC TRANSDUCING HEAD AND MEANS FOR ADJUSTABLY SUPPORTING SAID TRANSDUCING HEAD RELATIVE TO A SURFACE OF SAID RECORDING MEDIUM, THE METHOD FOR LOCATING SAID TRANSDUCING HEAD IN SPACED RELATIONSHIP TO SAID SURFACE OF SAID RECORDING MEDIUM COMPRISING: (A) THERMALLY PRODUCING AND MAINTAINING A NEGATIVE DIMENSIONAL CHANGE IN A DISTANCE BETWEEN SAID SURFACE OF SAID RECORDING MEDIUM AND SAID SUPPORTING MEANS FOR SAID TRANSDUCING HEAD; (B) ADJUSTABLY POSITIONING AND SECURING SAID HEAD IN CONTACT WITH SAID SURFACE OF SAID RECORDING MEDIUM; AND (C) TERMINATING MAINTENANCE OF SAID THERMALLY REDUCED DIMENSIONAL CHANGE TO PERMIT A POSITIVE DIMENSIONAL CHANGE IN SAID DISTANCE.
Claim 2
Dependent Claim
113 words
IN A MAGNETIC RECORDING APPARATUS HAVING A ROTATABLE RECORDING MEDIUM SUPPORT, AT LEAST ONE MAGNETIC TRANSDUCING HEAD AND MEANS FOR ADJUSTABLY SUPPORTING SAID TRANSDUCING HEAD RELATIVE TO A SURFACE OF SAID RECORDING MEDIUM, THE METHOD FOR LOCATING SAID TRANSDUCING HEAD IN SPACED RELATIONSHIP TO SAID SURFACE OF SAID RECORDING MEDIUM COMPRISING: (A) THERMALLY PRODUCING AND MAINTAINING A NEGATIVE DIMENSIONAL CHANGE IN A DISTANCE BETWEEN SAID SURFACE OF SAID RECORDING MEDIUM AND SAID SUPPORTING MEANS FOR SAID TRANSDUCING HEAD; (B) ADJUSTABLY POSITIONING AND SECURING SAID HEAD IN CONTACT WITH SAID SURFACE OF SAID RECORDING MEDIUM; AND (C) TERMINATING MAINTENANCE OF SAID THERMALLY REDUCED DIMENSIONAL CHANGE TO PERMIT A POSITIVE DIMENSIONAL CHANGE IN SAID DISTANCE.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |