US3401236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape apparatus with head positioning means
Assignee: Ampex Corp
•
Filing: 1965-06-23
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Granted: 1968-09-10
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Expires: 1985-06-23
Abstract
No abstract record available.
Inventors
- 👤 Narma Rein
- 👤 Delmar R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A MAGNETIC TRANSDUCING HEAD AND ROTATABLE DRUM ASSEMBLY FOR USE IN MAGNETIC TAPE RECORDING AND REPRODUCING APPARATUS, INCLUDING IN COMBINATION, A ROTATABLE DRUM HAVING A HUB PORTION AND A CYLINDRICAL WALL PORTION AND A CONNECTING PORTION, LOCATING MEANS ON SAID DRUM PROVIDING FIRST AND SECOND MUTUALLY TRANSVERSE REFERENCE SURFACES, A MAGNETIC TRANDUCING HEAD HAVING A TAPE ENGAGING TIP PROTRUDING EXTERNALLY OF SAID WALL PORTION OF SAID DRUM, SAID HEAD FURTHER HAVING THIRD AND FOURTH MUTUALLY TRANSVERSE REFERENCE SURFACES ADAPTED TO MATE RESPECTIVELY WITH SAID FIRST AND SECOND REFERENCE SURFACES ON SAID LOCATING MEANS AND POSITION SAID HEAD WITH RESPECT TO SAID DRUM, SAID FIRST AND SECOND REFERENCE SURFACES BEING DISPOSED TO PERMIT MOVEMENT OF SAID HEAD RADIALLY WITH RESPECT TO SAID DRUM, RESILIENT MEANS ENGAGING SAID HEAD AND BIASING SAID THIRD REFERENCE SURFACE AGAINST SAID FIRST REFERENCE SURFACE AND URGING SAID TIP OUTWARDLY OF SAID WALL PORTION OF SAID DRUM, AND LOCKING MEANS OPERABLE TO
Claim 2
Dependent Claim
155 words
A MAGNETIC TRANSDUCING HEAD AND ROTATABLE DRUM ASSEMBLY FOR USE IN MAGNETIC TAPE RECORDING AND REPRODUCING APPARATUS, INCLUDING IN COMBINATION, A ROTATABLE DRUM HAVING A HUB PORTION AND A CYLINDRICAL WALL PORTION AND A CONNECTING PORTION, LOCATING MEANS ON SAID DRUM PROVIDING FIRST AND SECOND MUTUALLY TRANSVERSE REFERENCE SURFACES, A MAGNETIC TRANDUCING HEAD HAVING A TAPE ENGAGING TIP PROTRUDING EXTERNALLY OF SAID WALL PORTION OF SAID DRUM, SAID HEAD FURTHER HAVING THIRD AND FOURTH MUTUALLY TRANSVERSE REFERENCE SURFACES ADAPTED TO MATE RESPECTIVELY WITH SAID FIRST AND SECOND REFERENCE SURFACES ON SAID LOCATING MEANS AND POSITION SAID HEAD WITH RESPECT TO SAID DRUM, SAID FIRST AND SECOND REFERENCE SURFACES BEING DISPOSED TO PERMIT MOVEMENT OF SAID HEAD RADIALLY WITH RESPECT TO SAID DRUM, RESILIENT MEANS ENGAGING SAID HEAD AND BIASING SAID THIRD REFERENCE SURFACE AGAINST SAID FIRST REFERENCE SURFACE AND URGING SAID TIP OUTWARDLY OF SAID WALL PORTION OF SAID DRUM, AND LOCKING MEANS OPERABLE TO
References Cited (Backward Citations)
US3076060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |