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US3243744A Expired / Lapsed US ⏱️ 0.0 years remaining

Toroidal core electrical transformer with cooling fins

Assignee: Federal Pacific Electric Co
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Filing: 1960-08-03
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Granted: 1966-03-29
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Expires: 1980-08-03
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Abstract

No abstract record available.

Inventors

  • 👤 Andrew A Halacsy

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 16:21
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/085

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 141 words
AN ELECTRICAL TRANSFORMER COMPRISING A TOROIDAL MAGNETIC CORE AND HEAT GENERATING WINDINGS THEREON ARRANGED AS INNER AND OUTER LAYERS OF CURRENT-CARRYING CONVOLUTIONS HAVING LAYERS OF INSULATION BETWEEN THE LAYERS OF CONVOLUTIONS, SAID MAGNETIC CORE BEING OF CIRCULAR CROSS SECTION AS VIEWED IN A PLANE CONTAINING THE TOROIDAL AXIS, AND MEANS FOR CONDUCTING HEAT TO THE AMBIENT ATMOSPHERE COMPRISING A SERIES OF HEAT CONDUCTING MEMBERS EACH HAVING A FIRST METAL PORTION EXTENDING ALONG THE CORE LOCALLY AND CONFRONTING AT LEAST ONE OF SAID LAYERS OF CONVOLUTIONS, SAID FIRST METAL PORTIONS BEING OF SEMICIRCULAR CROSS SECTION AND DISPOSED TO CONFRONT THE PERIPHERALLY OUTWARD PORTION OF SAID TOROIDAL CORE, AND MEMBERS EACH HAVING ANOTHER METAL PORTION EXTENDING INTEGRALLY FROM SAID FIRST PORTION AND DISPOSED RADIALLY OUTWARD SO AS TO EXTEND BETWEEN ADJACENT CONVOLUTIONS OF AT LEAST ONE OF SAID LAYERS INTO THE AMBIENT ATMOSPHERE.
Claim 2
Dependent Claim 141 words
AN ELECTRICAL TRANSFORMER COMPRISING A TOROIDAL MAGNETIC CORE AND HEAT GENERATING WINDINGS THEREON ARRANGED AS INNER AND OUTER LAYERS OF CURRENT-CARRYING CONVOLUTIONS HAVING LAYERS OF INSULATION BETWEEN THE LAYERS OF CONVOLUTIONS, SAID MAGNETIC CORE BEING OF CIRCULAR CROSS SECTION AS VIEWED IN A PLANE CONTAINING THE TOROIDAL AXIS, AND MEANS FOR CONDUCTING HEAT TO THE AMBIENT ATMOSPHERE COMPRISING A SERIES OF HEAT CONDUCTING MEMBERS EACH HAVING A FIRST METAL PORTION EXTENDING ALONG THE CORE LOCALLY AND CONFRONTING AT LEAST ONE OF SAID LAYERS OF CONVOLUTIONS, SAID FIRST METAL PORTIONS BEING OF SEMICIRCULAR CROSS SECTION AND DISPOSED TO CONFRONT THE PERIPHERALLY OUTWARD PORTION OF SAID TOROIDAL CORE, AND MEMBERS EACH HAVING ANOTHER METAL PORTION EXTENDING INTEGRALLY FROM SAID FIRST PORTION AND DISPOSED RADIALLY OUTWARD SO AS TO EXTEND BETWEEN ADJACENT CONVOLUTIONS OF AT LEAST ONE OF SAID LAYERS INTO THE AMBIENT ATMOSPHERE.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-03-28 1969-09-27 1970-03-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-03-28 1973-09-27 1974-03-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-03-28 1977-09-27 1978-03-29 $7700.00 Window Closed / Lapsed

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