Patent US3271843A successfully refreshed from Google Patents.
US3271843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a magnetic recording head
Assignee: Individual
•
Filing: 1962-09-27
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Granted: 1966-09-13
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Charles L Vice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29; G11B5/17; G11B5/295; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49027; Y10T29/49032; Y10T29/4906; Y10T29/49071; Y10T29/49826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A METHOD FOR MAKING A MAGNETIC RECORDING HEAD ASSEMBLY OF THE TYPE WHICH INCLUDES A BODY SUPPORT HAVING A FACE AND AN OUTER WALL AND WITH A MAGNETIC CORE SECURED THEREIN, COMPRISING: BORING A HOLE INTO THE BODY NEAR THE FACE AND PARALLEL THERETO, THE RADIUS OF THE HOLE BEING SMALLER THAN THE DISTANCE OF THE CENTER OF THE HOLE FROM THE FACE; UNDERCUTTING A GROOVE INTO THE WALL OF DEFINING THE HOLE FROM WITHIN SAID HOLE AND SUBSTANTIALLY CONCENTRIC THERETO, THE DEPTH OF THE GROOVE BEING GREATER THAN THE DIFFERENCE BETWEEN THE RADIUS AND SAID DISTANCE, SO THAT THE GROOVE FORMS AN OPENING IN THE FACE; FORMING AN ENTRY POST THROUGH THE OUTER WALL OF THE BODY INTO THE GROOVE; PROVIDING SAID CORE GAP IN THE OPENING AND THE CORE SEATED IN THE GROOVE, WITH AT LEAST A PORTION OF THE PERIPHERY OF SAID CORE HAVING AN ARC OF RADIUS SUBSTANTIALLY EQUAL TO THAT OF THE GROOVE, AND HAVING A PAIR OF PARALLEL SIDES SPACED APART BY A DISTANCE LESS THAN THE WIDTH OF THE ENTRY PORT; INSERTING SAID CORE THROUGH THE ENTRY PORT WITH THE SAID PARALLEL SIDES ALIGNED THEREWITH, THEN ROTATING THE CORE IN POSITION IN THE GROOVE; AND SECURING THE CORE TO THE BODY IN THE GROOVE.
Claim 2
Independent Claim
211 words
A METHOD FOR MAKING A MAGNETIC RECORDING HEAD ASSEMBLY OF THE TYPE WHICH INCLUDES A BODY SUPPORT HAVING A FACE AND AN OUTER WALL AND WITH A MAGNETIC CORE SECURED THEREIN, COMPRISING: BORING A HOLE INTO THE BODY NEAR THE FACE AND PARALLEL THERETO, THE RADIUS OF THE HOLE BEING SMALLER THAN THE DISTANCE OF THE CENTER OF THE HOLE FROM THE FACE; UNDERCUTTING A GROOVE INTO THE WALL OF DEFINING THE HOLE FROM WITHIN SAID HOLE AND SUBSTANTIALLY CONCENTRIC THERETO, THE DEPTH OF THE GROOVE BEING GREATER THAN THE DIFFERENCE BETWEEN THE RADIUS AND SAID DISTANCE, SO THAT THE GROOVE FORMS AN OPENING IN THE FACE; FORMING AN ENTRY POST THROUGH THE OUTER WALL OF THE BODY INTO THE GROOVE; PROVIDING SAID CORE GAP IN THE OPENING AND THE CORE SEATED IN THE GROOVE, WITH AT LEAST A PORTION OF THE PERIPHERY OF SAID CORE HAVING AN ARC OF RADIUS SUBSTANTIALLY EQUAL TO THAT OF THE GROOVE, AND HAVING A PAIR OF PARALLEL SIDES SPACED APART BY A DISTANCE LESS THAN THE WIDTH OF THE ENTRY PORT; INSERTING SAID CORE THROUGH THE ENTRY PORT WITH THE SAID PARALLEL SIDES ALIGNED THEREWITH, THEN ROTATING THE CORE IN POSITION IN THE GROOVE; AND SECURING THE CORE TO THE BODY IN THE GROOVE.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |