US3340518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head structure
Assignee: International Business Machines Corp
•
Filing: 1963-12-23
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Granted: 1967-09-05
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 James S Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:13
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; G11B5/127; G11B5/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A MAGNETIC HEAD STRUCTURE COMPRISING, IN COMBINATION: A FIRST BLOCK HAVING A FLAT SURFACE IN WHICH A PLURALITY OF SPACED RECESSES ARE FORMED; A SECOND BLOCK HAVING A PLURALITY OF WIDER RECESSES COMMUNICATING WITH THE RECESSES IN SAID FIRST BLOCK; MAGNETIC HEAD MEMBERS RECEIVED WITHIN SAID RECESSES IN SAID FIRST AND SECOND BLOCKS, SAID HEAD MEMBERS IN SAID SECOND BLOCK HAVING FLAT SURFACES ENGAGEABLE WITH SAID FLAT SURFACE ON SAID FIRST BLOCK; MEANS BONDING SAID HEAD MEMBERS IN SAID COMMUNICATING RECESSES TOGETHER SO AS TO FORM UNIFORM HEAD GAPS; MEANS ACTING ON SAID HEAD MEMBERS SUPPORTED BY SAID SECOND BLOCK FOR YIELDINGLY HOLDING THEIR FLAT SURFACES IN ENGAGEMENT WITH THE FLAT SURFACE ON SAID FIRST BLOCK; AND MEANS FOR CLAMPING SAID BLOCKS TOGETHER.
Claim 2
Dependent Claim
123 words
A MAGNETIC HEAD STRUCTURE COMPRISING, IN COMBINATION: A FIRST BLOCK HAVING A FLAT SURFACE IN WHICH A PLURALITY OF SPACED RECESSES ARE FORMED; A SECOND BLOCK HAVING A PLURALITY OF WIDER RECESSES COMMUNICATING WITH THE RECESSES IN SAID FIRST BLOCK; MAGNETIC HEAD MEMBERS RECEIVED WITHIN SAID RECESSES IN SAID FIRST AND SECOND BLOCKS, SAID HEAD MEMBERS IN SAID SECOND BLOCK HAVING FLAT SURFACES ENGAGEABLE WITH SAID FLAT SURFACE ON SAID FIRST BLOCK; MEANS BONDING SAID HEAD MEMBERS IN SAID COMMUNICATING RECESSES TOGETHER SO AS TO FORM UNIFORM HEAD GAPS; MEANS ACTING ON SAID HEAD MEMBERS SUPPORTED BY SAID SECOND BLOCK FOR YIELDINGLY HOLDING THEIR FLAT SURFACES IN ENGAGEMENT WITH THE FLAT SURFACE ON SAID FIRST BLOCK; AND MEANS FOR CLAMPING SAID BLOCKS TOGETHER.
References Cited (Backward Citations)
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |