Patent US3177495A successfully refreshed from Google Patents.
US3177495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring mounted head for disc memory
Assignee: General Precision Inc
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Filing: 1962-05-31
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Granted: 1965-04-06
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Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 John A Felts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:09
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4826; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49027; Y10T29/4903
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
A RECORDING HEAD MOUNTING FOR MAINTAINING A VERY SMALL AIR GAP BETWEEN A ROTATING MAGNETIC RECORDING DISC AND THE RECORDING HEAD IRRESPECTIVE OF WOBBLE OF SAID DISC COMPRISING: (A) A SUBSTANTIALLY RECTANGULAR RECORDING HEAD SHOE HAVING A FLAT BOTTOM SURFACE ADAPTED TO FLOAT ON A THIN FILM OF AIR MOVING WITH THE RECORDING SURFACE OF A ROTATING MAGNETIC RECORDING DISC, (B) A RECORDING HEAD CORE MOUNTED IN SAID SHOE WITH THE RECORDING PORTION OF SAID CORE FLUSH WITH THE FLAT BOTTOM SURFACE OF SAID SHOE, (C) A PAIR OF ALIGNMENT PINS VERTICALLY POSITIONED IN THE TOP SURFACE OF SAID SHOE AND PLACED EQUIDISTANT FROM THE LEADING EDGE OF SAID SHOE AT POINTS THAT ARE BETWEEN 3/9 AND 5/9 THE LENGTH OF SAID SHOE, AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |