US3382326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer head
Assignee: IIT Research Institute
•
Filing: 1962-03-08
•
Granted: 1968-05-07
•
Expires: 1982-03-08
Abstract
No abstract record available.
Inventors
- 👤 Camras Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/49; G11B5/4907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A TRANSDUCER DEVICE COMPRISING A CORE HAVING LARGE CROSS SECTION PORTIONS WITH A LARGE FLUX CARRYING CAPACITY AND HAVING A CONSTRICTED CROSS SECTION PORTION WITH A SUBSTANTIALLY REDUCED CROSS SECTION AND A SUBSTANTIALLY REDUCED FLUX CARRYING CAPACITY IN COMPARISON TO SAID LARGE CROSS SECTION PORTIONS OF SAID CORE, FIRST AND SECOND ENERGIZING MEANS COUPLED TO SAID CORE FOR GENERATING CYCLICALLY VARYING MAGNETOMOTIVE FORCES IN THE CORE OF RESPECTIVE AMPLITUDES AND PHASES WHICH COACT TO SWITCH SAID CORE FROM ONE POLARITY OF MAGNETIZATION TO ANOTHER POLARITY OF MAGNETIZATION IN SUCCESSIVE CYCLES THEREOF, AND MEANS COMPRISING SAID CORE FOR CARRYING OUT A TRANSDUCING OPERATION AT THE TIME INTERVALS WHEN SAID CORE IS BEING SWITCHED FROM SAID ONE POLARITY OF MAGNETIZATION TO THE OTHER POLARITY OF MAGNETIZATION,
Claim 2
Dependent Claim
124 words
A TRANSDUCER DEVICE COMPRISING A CORE HAVING LARGE CROSS SECTION PORTIONS WITH A LARGE FLUX CARRYING CAPACITY AND HAVING A CONSTRICTED CROSS SECTION PORTION WITH A SUBSTANTIALLY REDUCED CROSS SECTION AND A SUBSTANTIALLY REDUCED FLUX CARRYING CAPACITY IN COMPARISON TO SAID LARGE CROSS SECTION PORTIONS OF SAID CORE, FIRST AND SECOND ENERGIZING MEANS COUPLED TO SAID CORE FOR GENERATING CYCLICALLY VARYING MAGNETOMOTIVE FORCES IN THE CORE OF RESPECTIVE AMPLITUDES AND PHASES WHICH COACT TO SWITCH SAID CORE FROM ONE POLARITY OF MAGNETIZATION TO ANOTHER POLARITY OF MAGNETIZATION IN SUCCESSIVE CYCLES THEREOF, AND MEANS COMPRISING SAID CORE FOR CARRYING OUT A TRANSDUCING OPERATION AT THE TIME INTERVALS WHEN SAID CORE IS BEING SWITCHED FROM SAID ONE POLARITY OF MAGNETIZATION TO THE OTHER POLARITY OF MAGNETIZATION,
References Cited (Backward Citations)
US2955169A
Cited
DE1026974B
Cited
US2921143A
Cited
US2872530A
Cited
US2897290A
Cited
US2915597A
Cited
US3171107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |