US3169236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic core for electrical induction apparatus with reduced magnetic losses
Assignee: General Electric Co
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Filing: 1961-04-17
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Granted: 1965-02-09
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Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 James M Mcquade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:39
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/02; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; H01F1/14783; H01F27/00; H01F27/24; H01F27/245; H01F41/00; H01F41/02; H01F41/0206; H01F41/0233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN AN ELECTRICAL TRANSFORMER, A SUBSTANTIALLY RECTANGULAR MAGNETIC CORE COMPRISING A PLURALITY OF STACKED LAMINATIONS OF GRAIN-ORIENTED SILICON STEEL, THE DIRECTION OF ORIENTATION OF THE GRAINS BEING SUBSTANTIALLY PARALLEL TO THE LONG SIDES OF SAID LAMINATION, THERE BEING MAGNETIC FLUX PASSING THROUGH SAID CORE WHEN THE TRANSFORMER IS IN OPERATION, SAID FLUX TRAVELING IN THE DIRECTION OF GRAIN OREINTATION THROUGH THE MAJOR PORTION OF SAID CORE, AND SAID FLUX TRAVELING THE CROSS-GRAIN DIRECTION AT TEH CORNERS OF SAID CORE, AN ELECTRICAL INSULATING COATING CONSISTING ESSENTIALLY OF BETA CALCIUM ORTHOSILICATED BONDED TO THE SURFACE OF SAID LAMINATION ONLY AT THE CORNERS WHERE FLUX TRAVELS IN THE CROSS GRAIN DIRECTION, WHEREBY CORE LOSSES AND MAGNETO-STRICTIVE STRAINS CAUSED BY FLUX TRAVELING ACROSS THE GRAIN WHEN SAID APPARATUS IS ENERGIZED ARE REDUCED.
Claim 2
Dependent Claim
128 words
IN AN ELECTRICAL TRANSFORMER, A SUBSTANTIALLY RECTANGULAR MAGNETIC CORE COMPRISING A PLURALITY OF STACKED LAMINATIONS OF GRAIN-ORIENTED SILICON STEEL, THE DIRECTION OF ORIENTATION OF THE GRAINS BEING SUBSTANTIALLY PARALLEL TO THE LONG SIDES OF SAID LAMINATION, THERE BEING MAGNETIC FLUX PASSING THROUGH SAID CORE WHEN THE TRANSFORMER IS IN OPERATION, SAID FLUX TRAVELING IN THE DIRECTION OF GRAIN OREINTATION THROUGH THE MAJOR PORTION OF SAID CORE, AND SAID FLUX TRAVELING THE CROSS-GRAIN DIRECTION AT TEH CORNERS OF SAID CORE, AN ELECTRICAL INSULATING COATING CONSISTING ESSENTIALLY OF BETA CALCIUM ORTHOSILICATED BONDED TO THE SURFACE OF SAID LAMINATION ONLY AT THE CORNERS WHERE FLUX TRAVELS IN THE CROSS GRAIN DIRECTION, WHEREBY CORE LOSSES AND MAGNETO-STRICTIVE STRAINS CAUSED BY FLUX TRAVELING ACROSS THE GRAIN WHEN SAID APPARATUS IS ENERGIZED ARE REDUCED.
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) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |