US3077946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise suppression in electric power transformers
Assignee: English Electric Co Ltd
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Filing: 1960-06-13
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Granted: 1963-02-19
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Expires: 1980-06-13
Abstract
No abstract record available.
Inventors
- 👤 Wilkins John Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:43
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AN ELECTRIC POWER TRANSFORMER COMPRISING A TANK RIGIDLY MOUNTED ON A BASE AND CONTAINING A CORE, WINDINGS AND AN INSULATING AND COOLING MEDIUM, EXTERNAL CLADDING MEANS COMPRISING AT LEAST ONE PLATE CONSTITUTING A SOUND-REFLECTING MEDIUM AND SPACED AWAY FROM THE TANK, AND FLEXIBLE SUPPORT MEANS SECURED TO SAID TANK AND TO SAID EXTERNAL CLADDING MEANS SUPPORTING SAID CLADDING MEANS FROM SAID TANK, THE MASS OF THE CLADDING MEANS AND THE RESILIENCE OF THE FLEXIBLE SUPPORT MEANS BEING SUCH THAT THE FLEXIBLY-SUPPORTED CLADDING HAS A NATURAL RESONANT FREQUENCY SUBSTANTIALLY LESS THAN THE OPERATIONAL FREQUENCY OF THE TRANSFORMER.
Claim 2
Dependent Claim
96 words
AN ELECTRIC POWER TRANSFORMER COMPRISING A TANK RIGIDLY MOUNTED ON A BASE AND CONTAINING A CORE, WINDINGS AND AN INSULATING AND COOLING MEDIUM, EXTERNAL CLADDING MEANS COMPRISING AT LEAST ONE PLATE CONSTITUTING A SOUND-REFLECTING MEDIUM AND SPACED AWAY FROM THE TANK, AND FLEXIBLE SUPPORT MEANS SECURED TO SAID TANK AND TO SAID EXTERNAL CLADDING MEANS SUPPORTING SAID CLADDING MEANS FROM SAID TANK, THE MASS OF THE CLADDING MEANS AND THE RESILIENCE OF THE FLEXIBLE SUPPORT MEANS BEING SUCH THAT THE FLEXIBLY-SUPPORTED CLADDING HAS A NATURAL RESONANT FREQUENCY SUBSTANTIALLY LESS THAN THE OPERATIONAL FREQUENCY OF THE TRANSFORMER.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |