Patent US2551937A successfully refreshed from Google Patents.
Patent US3193835A successfully refreshed from Google Patents.
US3193835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-loading transducer mounting
Assignee: Unisys Corp
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Filing: 1961-06-20
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Granted: 1965-07-06
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Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Walter G Wadey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
313 words
IN COMBINATION A RECORD MEDIUM, A TRANSDUCER FOR PRODUCING A RECORD ON SAID RECORD MEDIUM IN RESPONSE TO SIGNAL SUPPLIED TO SAID TRANSDUCER, MEANS FOR MOVING SAID RECORD MEDIUM AT A SUBSTANTIALLY HIGH RECORDING SPEED WITH RESPECT TO SAID TRANSDUCER TO ESTABLISH A LAYER OF AMBIENT GAS CARRIED BY THE SURFACE OF SAID MEDIUM, MEANS FOR MOUNTING SAID TRANSDUCER IN VARIABLE SPACED RELATIONSHIP WITH THE SURFACE OF SAID RECORD MEDIUM, SAID MEANS FOR MOUNTING BEING ARRANGED TO ALLOW SAID TRANSDUCER TO BE SUFFICIENTLY SPACED FROM THE SURFACE OF SAID RECORD MEDIUM TO PREVENT CONTACT THEREWITH WHEN THE SAID RECORD MEDIUM IS MOVING AT A SLOW SPEED, SAID TRANSDUCER MOUNTING INCLUDING A MEMBER CARRYING SAID TRANSDUCER AND HAVING A FIRST AND SECOND SURFACE AREA FACING SAID RECORD MEDIUM, SAID MEMBER HAVING AN AIRFOIL SHAPED TO PROVIDE BERNOUILLI FORCES ON SAID MEMBER, SAID FIRST SURFACE AREA BEING ORIENTED TO FORM WITH THE SURFACE OF SAID RECORD MEDIUM AN ACTUATE ANGLE FACING A DIRECTION OPPOSITE TO THE DIRECTION IN WHICH SAID GAS LAYER IS CARRIED BY SAID RECORD MEDIUM SURFACE AND ORIENTED TO LEAD SAID TRANSDUCER, SAID SECOND SURFACE AREA BEING ORIENTED TO FORM WITH THE SURFACE OF SAID RECORD MEDIUM AN ACUTE ANGLE FACING A DIRECTION OPPOSITE THAT OF SAID ANGLE FORMED WITH SAID FIRST SURFACE AND ORIENTED TO TRAIL SAID TRANSDUCER, WHEREBY SAID SECOND SURFACE AREA IN COMBINATION WITH SAID FIRST SURFACE AREA REACTS TO SAID GAS LAYER IN MANNER TO EXERT A FIRST FORCE ON SAID MEMBER TENING TO BRING SAID TRANSDUCER IN CLOSER PROXIMITY TO THE SURFACE OF SAID MEDIUM WHEN SAID RECORDING MEDIUM IS MOVED AT A HIGH SPEED FOR RECORDING AND SAID FIRST SURFACE AREA REACTS TO SAID GAS LAYER IN MANNER TO EXERT A SECOND FORCE OPPOSING SAID FIRST FORCE AND EFFECTIVE TO BALANCE SAID FIRST FORCE WHEN SAID TRANSDUCER IS IN CLOSE RECORDING RELATIONSHIP TO SAID RECORD MEDIUM.
Claim 2
Dependent Claim
313 words
IN COMBINATION A RECORD MEDIUM, A TRANSDUCER FOR PRODUCING A RECORD ON SAID RECORD MEDIUM IN RESPONSE TO SIGNAL SUPPLIED TO SAID TRANSDUCER, MEANS FOR MOVING SAID RECORD MEDIUM AT A SUBSTANTIALLY HIGH RECORDING SPEED WITH RESPECT TO SAID TRANSDUCER TO ESTABLISH A LAYER OF AMBIENT GAS CARRIED BY THE SURFACE OF SAID MEDIUM, MEANS FOR MOUNTING SAID TRANSDUCER IN VARIABLE SPACED RELATIONSHIP WITH THE SURFACE OF SAID RECORD MEDIUM, SAID MEANS FOR MOUNTING BEING ARRANGED TO ALLOW SAID TRANSDUCER TO BE SUFFICIENTLY SPACED FROM THE SURFACE OF SAID RECORD MEDIUM TO PREVENT CONTACT THEREWITH WHEN THE SAID RECORD MEDIUM IS MOVING AT A SLOW SPEED, SAID TRANSDUCER MOUNTING INCLUDING A MEMBER CARRYING SAID TRANSDUCER AND HAVING A FIRST AND SECOND SURFACE AREA FACING SAID RECORD MEDIUM, SAID MEMBER HAVING AN AIRFOIL SHAPED TO PROVIDE BERNOUILLI FORCES ON SAID MEMBER, SAID FIRST SURFACE AREA BEING ORIENTED TO FORM WITH THE SURFACE OF SAID RECORD MEDIUM AN ACTUATE ANGLE FACING A DIRECTION OPPOSITE TO THE DIRECTION IN WHICH SAID GAS LAYER IS CARRIED BY SAID RECORD MEDIUM SURFACE AND ORIENTED TO LEAD SAID TRANSDUCER, SAID SECOND SURFACE AREA BEING ORIENTED TO FORM WITH THE SURFACE OF SAID RECORD MEDIUM AN ACUTE ANGLE FACING A DIRECTION OPPOSITE THAT OF SAID ANGLE FORMED WITH SAID FIRST SURFACE AND ORIENTED TO TRAIL SAID TRANSDUCER, WHEREBY SAID SECOND SURFACE AREA IN COMBINATION WITH SAID FIRST SURFACE AREA REACTS TO SAID GAS LAYER IN MANNER TO EXERT A FIRST FORCE ON SAID MEMBER TENING TO BRING SAID TRANSDUCER IN CLOSER PROXIMITY TO THE SURFACE OF SAID MEDIUM WHEN SAID RECORDING MEDIUM IS MOVED AT A HIGH SPEED FOR RECORDING AND SAID FIRST SURFACE AREA REACTS TO SAID GAS LAYER IN MANNER TO EXERT A SECOND FORCE OPPOSING SAID FIRST FORCE AND EFFECTIVE TO BALANCE SAID FIRST FORCE WHEN SAID TRANSDUCER IS IN CLOSE RECORDING RELATIONSHIP TO SAID RECORD MEDIUM.
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |