US3199093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Erasure prevention control for magnetic tape recorder
Assignee: Ampex Corp
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Filing: 1962-06-29
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Granted: 1965-08-03
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Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Walter J Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:06
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/28; G11B23/281; G11B15/00; G11B15/02; G11B15/04; G11B15/05; G11B15/06; G11B5/00; G11B5/02; G11B5/027; G11B5/03; H; H01; H01H; H01H36/00; H01H36/0006; H01H36/0013; H01H36/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A CONTROL MECHANISM FOR A MAGNETIC TAPE MACHINE OF THE TYPE THAT IS PROVIDED WITH A TAPE SUPPLY REEL, COMPRISING: A MAGNETIC REED SWITCH MOUNTED ON SAID MACHINE ADJACENT TO SAID REEL, SAID SWITCH BEING OPERABLE BETWEEN OPEN AND CLOSED POSITIONS AND INCLUDING MEANS URGING SAID SWITCH TOWARD ONE OF SAID POSITIONS; MEANS MOUNTED ON SAID MACHINE AJACENT TO SAID SWITCH FOR MAGNETICALLY BIASING SAID SWITCH TO THE OTHER OF SAID POSITIONS; AND MEANS DETACHABLY MOUNTED ON SAID REEL FOR ALTERING SAID FIELD AT SAID SWITCH FOR OPERATION TO SAID ONE POSITION UNDER THE URGING OF SAID FIRST-NAMED MEANS.
Claim 2
Dependent Claim
99 words
A CONTROL MECHANISM FOR A MAGNETIC TAPE MACHINE OF THE TYPE THAT IS PROVIDED WITH A TAPE SUPPLY REEL, COMPRISING: A MAGNETIC REED SWITCH MOUNTED ON SAID MACHINE ADJACENT TO SAID REEL, SAID SWITCH BEING OPERABLE BETWEEN OPEN AND CLOSED POSITIONS AND INCLUDING MEANS URGING SAID SWITCH TOWARD ONE OF SAID POSITIONS; MEANS MOUNTED ON SAID MACHINE AJACENT TO SAID SWITCH FOR MAGNETICALLY BIASING SAID SWITCH TO THE OTHER OF SAID POSITIONS; AND MEANS DETACHABLY MOUNTED ON SAID REEL FOR ALTERING SAID FIELD AT SAID SWITCH FOR OPERATION TO SAID ONE POSITION UNDER THE URGING OF SAID FIRST-NAMED MEANS.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |