US3317874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating transformer
Assignee: Allis Chalmers Corp
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Filing: 1964-06-25
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Granted: 1967-05-02
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Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 Vernon B Honsinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:08
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
AN ELECTRIC TRANSFORMER COMPRISING: A PLURALITY OF IRON LAMINATIONS ARRANGED TO DEFINE A FIRST ANNULAR CORE MEMBER, A SECOND ANNULAR CORE MEMBER CONCENTRIC WITH SAID FIRST CORE MEMBER; SAID SECOND CORE MEMBER HAVING A FIRST SET OF U-SHAPED LAMINATIONS ARRANGED TO FORM AN ANNULAR MEMBER WITH THE LEG PORTIONS OF SAID LAMINATIONS EXTENDING RADIALLY OUTWARD, A SECOND SET OF U-SHAPED LAMINATIONS POSITIONED BETWEEN THE LEGS OF SAID LAMINATIONS OF SAID FIRST SET AND BEING ARRANGED WITH THEIR LEGS EXTENDING RADIALLY OUTWARD TO DEFINE THEREBETWEEN AN ANNULAR GROOVE, A THIRD SET OF LAMINATIONS HAVING A SUBSTANTIALLY RECTANGULAR SHAPE POSITIONED WITHIN SAID ANNULAR GROOVE, SAID CORE MEMBERS COMBINING TO DEFINE THEREBETWEEN AN ANNULAR TORUS; A FIRST COIL POSITIONED WITHIN SAID TORUS AND BEING CONNECTED TO A SOURCE OF CURRENT; A SECOND COIL POSITIONED IN SAID TORUS AND CONNECTED TO A LOAD, ONE OF SAID CORE MEMBERS BEING ROTATABLE RELATIVE TO THE OTHER AND EACH OF SAID LAMINATIONS OF EACH OF SAID CORES LYING IN A PLANE THAT INCLUDES THE CENTER LINE OF SAID CORE.
Claim 2
Dependent Claim
172 words
AN ELECTRIC TRANSFORMER COMPRISING: A PLURALITY OF IRON LAMINATIONS ARRANGED TO DEFINE A FIRST ANNULAR CORE MEMBER, A SECOND ANNULAR CORE MEMBER CONCENTRIC WITH SAID FIRST CORE MEMBER; SAID SECOND CORE MEMBER HAVING A FIRST SET OF U-SHAPED LAMINATIONS ARRANGED TO FORM AN ANNULAR MEMBER WITH THE LEG PORTIONS OF SAID LAMINATIONS EXTENDING RADIALLY OUTWARD, A SECOND SET OF U-SHAPED LAMINATIONS POSITIONED BETWEEN THE LEGS OF SAID LAMINATIONS OF SAID FIRST SET AND BEING ARRANGED WITH THEIR LEGS EXTENDING RADIALLY OUTWARD TO DEFINE THEREBETWEEN AN ANNULAR GROOVE, A THIRD SET OF LAMINATIONS HAVING A SUBSTANTIALLY RECTANGULAR SHAPE POSITIONED WITHIN SAID ANNULAR GROOVE, SAID CORE MEMBERS COMBINING TO DEFINE THEREBETWEEN AN ANNULAR TORUS; A FIRST COIL POSITIONED WITHIN SAID TORUS AND BEING CONNECTED TO A SOURCE OF CURRENT; A SECOND COIL POSITIONED IN SAID TORUS AND CONNECTED TO A LOAD, ONE OF SAID CORE MEMBERS BEING ROTATABLE RELATIVE TO THE OTHER AND EACH OF SAID LAMINATIONS OF EACH OF SAID CORES LYING IN A PLANE THAT INCLUDES THE CENTER LINE OF SAID CORE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |