US3127580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current regulating welding transformers and core therefor
Assignee: Individual
•
Filing: 1963-04-25
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Granted: 1964-03-31
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Expires: 1983-04-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:32
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A WELDING TRANSFORMER COMPRISING INDUCTIVELY COUPLED PRIMARY AND SECONDARY WINDINGS PRODUCING AN OUTPUT CURRENT, A FERROMAGNETIC CORE COMPOSING THE MAGNETIC CIRCUIT FOR SAID WINDINGS, CORE EXTENSIONS ON OPPOSITE ENDS OF SAID CORE OUTWARDLY OF SAID WINDINGS, EACH OF SAID CORE EXTENSIONS HAVING AN AIR GAP THEREIN PROVIDING A PAIR OF OPPOSITELY DISPOSED AIR GAPS, A SHUNT TRANSVERSELY MOVABLE IN ONE OF SAID AIR GAPS TO A PRESET POSITION TO SET THE MAXIMUM OUTPUT CURRENT FROM SAID SECONDARY WINDING, AND ANOTHER SHUNT INDEPENDENTLY TRANSVERSELY MOVABLE IN THE OTHER OF SAID AIR GAPS TO SELECTIVELY VARY THE OUTPUT CURRENT FROM THE SET MAXIMUM TO A MINIMUM.
Claim 2
Dependent Claim
104 words
A WELDING TRANSFORMER COMPRISING INDUCTIVELY COUPLED PRIMARY AND SECONDARY WINDINGS PRODUCING AN OUTPUT CURRENT, A FERROMAGNETIC CORE COMPOSING THE MAGNETIC CIRCUIT FOR SAID WINDINGS, CORE EXTENSIONS ON OPPOSITE ENDS OF SAID CORE OUTWARDLY OF SAID WINDINGS, EACH OF SAID CORE EXTENSIONS HAVING AN AIR GAP THEREIN PROVIDING A PAIR OF OPPOSITELY DISPOSED AIR GAPS, A SHUNT TRANSVERSELY MOVABLE IN ONE OF SAID AIR GAPS TO A PRESET POSITION TO SET THE MAXIMUM OUTPUT CURRENT FROM SAID SECONDARY WINDING, AND ANOTHER SHUNT INDEPENDENTLY TRANSVERSELY MOVABLE IN THE OTHER OF SAID AIR GAPS TO SELECTIVELY VARY THE OUTPUT CURRENT FROM THE SET MAXIMUM TO A MINIMUM.
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) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |