Patent US3219969A successfully refreshed from Google Patents.
US3219969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic transducer and driving circuit therefor
Assignee: Individual
•
Filing: 1960-09-19
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Granted: 1965-11-23
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Benjamin L Snavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:50
CPC Classifications
G; G10; G10K; G10K13/00; G01; G01S; G01S1/00; G01S1/72; G10K9/00; G10K9/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
AN UNDERWATER ELECTRACOUSTIC TRANSDUCER COMPRISING A SUBSTANTIALLY CYLINDRICAL, RIGID, HOLLOW MEMBER HAVING A PAIR OF OPPOSITELY POSITIONED OPEN ENDS, A PAIR OF MOVABLE SUBSTANTIALLY CYLINDRICAL PISTONS, EACH PISTON BEING LOCATED AT A RESPECTIVE END OF THE CYLINDRICAL MEMBER AND SLIDEABLE KN PROXIMITY TO THE INTERIOR WALL THEREOF, A CONTROL ELEMENT, ELECTROMOTIVE MEANS CONTAINED WITHIN EACH OF SAID PISTONS AND COUPLED TO SAID CONTROL ELEMENT FOR SYNCHRONOUSLY MOVING SAID PISTONS IN OPPOSITE DIRECTIONS, A FLUID SPRING CONSISTING ESSENTIALLY OF LIQUID SILICONE FILLING THE VOLUME WITHIN THE MEMBER BETWEEN SAID PISTONS, AND MEANS CARRIED BY EACH OF SAID PISTONS FOR RETAINING THE LIQUID SILICONE WITHIN THE MEMBER.
Claim 2
Dependent Claim
105 words
AN UNDERWATER ELECTRACOUSTIC TRANSDUCER COMPRISING A SUBSTANTIALLY CYLINDRICAL, RIGID, HOLLOW MEMBER HAVING A PAIR OF OPPOSITELY POSITIONED OPEN ENDS, A PAIR OF MOVABLE SUBSTANTIALLY CYLINDRICAL PISTONS, EACH PISTON BEING LOCATED AT A RESPECTIVE END OF THE CYLINDRICAL MEMBER AND SLIDEABLE KN PROXIMITY TO THE INTERIOR WALL THEREOF, A CONTROL ELEMENT, ELECTROMOTIVE MEANS CONTAINED WITHIN EACH OF SAID PISTONS AND COUPLED TO SAID CONTROL ELEMENT FOR SYNCHRONOUSLY MOVING SAID PISTONS IN OPPOSITE DIRECTIONS, A FLUID SPRING CONSISTING ESSENTIALLY OF LIQUID SILICONE FILLING THE VOLUME WITHIN THE MEMBER BETWEEN SAID PISTONS, AND MEANS CARRIED BY EACH OF SAID PISTONS FOR RETAINING THE LIQUID SILICONE WITHIN THE MEMBER.
Claim 3
Dependent Claim
111 words
A CIRCUIT FOR EFFECTING ENERGY TRANSFER BETWEEN A FIRST AND SECOND CORE COMPRISING FIRST ELECTROMAGNETIC MEANS COUPLED TO SAID FIRST CORE FOR CHANGING THE FLUX OF SAID FIRST CORE IN A FIRST DIRECTION, SECOND ELECTROMAGNETIC MEANS COUPLED TO SAID SECOND CORE FOR CHANGING THE FLUX OF SAID SECOND CORE IN A SECOND DIRECTION AT A DIFFERENT TIME THAN WHEN THE FLUX OF SAID FIRST CORE IS CHANGED IN THE FIRST DIRECTION, A FIRST COIL WOUND ON SAID FIRST CORE AND A SECOND COIL WOUND ON SAID SECOND CORE, A FIRST RECTIFYING MEANS COUPLED BETWEEN ONE END OF SAID FIRST COIL AND ONE END OF SAID SECOND COIL FOR PERMITTING CURRENT FLOW
Claim 4
Dependent Claim
111 words
A CIRCUIT FOR EFFECTING ENERGY TRANSFER BETWEEN A FIRST AND SECOND CORE COMPRISING FIRST ELECTROMAGNETIC MEANS COUPLED TO SAID FIRST CORE FOR CHANGING THE FLUX OF SAID FIRST CORE IN A FIRST DIRECTION, SECOND ELECTROMAGNETIC MEANS COUPLED TO SAID SECOND CORE FOR CHANGING THE FLUX OF SAID SECOND CORE IN A SECOND DIRECTION AT A DIFFERENT TIME THAN WHEN THE FLUX OF SAID FIRST CORE IS CHANGED IN THE FIRST DIRECTION, A FIRST COIL WOUND ON SAID FIRST CORE AND A SECOND COIL WOUND ON SAID SECOND CORE, A FIRST RECTIFYING MEANS COUPLED BETWEEN ONE END OF SAID FIRST COIL AND ONE END OF SAID SECOND COIL FOR PERMITTING CURRENT FLOW
References Cited (Backward Citations)
US3124730A
Cited
US2081619A
Cited
US2405575A
Cited
US2375158A
Cited
US2519916A
Cited
US2623738A
Cited
US2903673A
Cited
US2895095A
Cited
US2843742A
Cited
US2769946A
Cited
US2945168A
Cited
US3118098A
Cited
US2958078A
Cited
US3004178A
Cited
US3056104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |