US3243521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite magnetic transducer assembly having low wear construction
Assignee: Ampex Corp
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Filing: 1962-02-20
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Granted: 1966-03-29
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Expires: 1982-02-20
Abstract
No abstract record available.
Inventors
- 👤 Walter E Lock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:53
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/193; G11B5/255; G11B5/48; G11B5/52; G11B5/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AN IMPROVED ROTARY HEAD MAGNETIC TRANSDUCER FOR TRANSDUCING WIDEBAND FREQUENCY SIGNALS IN COOPERATION WITH A LONGITUDINALLY MOVING MAGNETIC TAPE COMPRISING: A FERRITE CORE HAVING A WEDGE SHAPE CONFIGURATION; A GLASS GAP BISECTING THE CORE CONFIGURATION; A FRONT GAP SURFACE INCLUDING SAID GLASS GAP FOR TRANSVERSELY ENGAGING THE MOVING MAGNETIC TAPE; SUCH FRONT GAP SURFACE HAVING A LEVEL RECTANGULAR PORTION BOUNNDED BY A LEADING EDGE PORTION AND A TRAILING EDGE PORTION BOTH SUBSTANTIALLY PERPENDICULAR TO SAID GAP AND DISPOSED IN SUBSTANTIALLY TRANSVERSE RELATION TO THE LONGITUDINAL MOVEMENT OF THE TAPE, SAID EDGE PORTIONS BEING EACH MACHINED TO DEFINE SMOOTH OBTUSE EDGES THEREALONG.
Claim 2
Dependent Claim
101 words
AN IMPROVED ROTARY HEAD MAGNETIC TRANSDUCER FOR TRANSDUCING WIDEBAND FREQUENCY SIGNALS IN COOPERATION WITH A LONGITUDINALLY MOVING MAGNETIC TAPE COMPRISING: A FERRITE CORE HAVING A WEDGE SHAPE CONFIGURATION; A GLASS GAP BISECTING THE CORE CONFIGURATION; A FRONT GAP SURFACE INCLUDING SAID GLASS GAP FOR TRANSVERSELY ENGAGING THE MOVING MAGNETIC TAPE; SUCH FRONT GAP SURFACE HAVING A LEVEL RECTANGULAR PORTION BOUNNDED BY A LEADING EDGE PORTION AND A TRAILING EDGE PORTION BOTH SUBSTANTIALLY PERPENDICULAR TO SAID GAP AND DISPOSED IN SUBSTANTIALLY TRANSVERSE RELATION TO THE LONGITUDINAL MOVEMENT OF THE TAPE, SAID EDGE PORTIONS BEING EACH MACHINED TO DEFINE SMOOTH OBTUSE EDGES THEREALONG.
References Cited (Backward Citations)
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Cited
US2715659A
Cited
US3024318A
Cited
US3026379A
Cited
US3046359A
Cited
US3170031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |