US3316481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell type welding transformer
Assignee: Individual
•
Filing: 1966-09-16
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Granted: 1967-04-25
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Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:15
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A SHELL TYPE WELDING TRANSFORMER COMPRISING A GENERALLY RECTANGULAR CORE INCLUDING LONGITUDINAL LEG PORTIONS AND END LEG PORTIONS, A PAIR OF INTERMEDIATE LEG PORTIONS CONNECTING OPPOSITE LONGITUDINAL LEG PORTIONS OF SAID CORE INTERMEDIATE SAID END LEG PORTIONS, A FIRST LONGITUDINAL LEG SECTION EXTENDING BETWEEN ONE OF SAID END LEG PORTIONS AND THE ADJACENT INTERMEDIATE LEG PORTION, A SECOND LONGITUDINAL LEG SECTION EXTENDING BETWEEN SAID PAIR OF INTERMEDIATE LEG PORTIONS, AN AIR GAP IN THE OTHER OF SAID END LEG PORTIONS AT ONE END OF THE CORE, A SHUNT CORE SECTION LONGITUDINALLY MOVABLE IN SAID GAP, SAID FIRST AND SECOND LONGITUDINAL LEG SECTIONS AND SAID SHUNT CORE SECTION DISPOSED SUBSTANTIALLY NORMAL TO SAID PAIR OF INTERMEDIATE LEG PORTIONS, INDUCTIVELY COUPLED PRIMARY AND SECONDARY WINDINGS FOR PRODUCING A SECONDARY OUTPUT CURRENT POSITIONED ABOUT SAID FIRST AND SECOND LONGITUDINAL LEG SECTIONS AND SAID SHUNT CORE SECTION, AND SAID SHUNT CORE SECTION MOVABLE TOWARD AND AWAY FROM THE OTHER INTERMEDIATE LEG PORTION TO ADJUST THE SECONDARY OUTPUT CURRENT FROM A PREDETERMINED MINIMUM TO A PREDETERMINED MAXIMUM.
Claim 2
Dependent Claim
172 words
A SHELL TYPE WELDING TRANSFORMER COMPRISING A GENERALLY RECTANGULAR CORE INCLUDING LONGITUDINAL LEG PORTIONS AND END LEG PORTIONS, A PAIR OF INTERMEDIATE LEG PORTIONS CONNECTING OPPOSITE LONGITUDINAL LEG PORTIONS OF SAID CORE INTERMEDIATE SAID END LEG PORTIONS, A FIRST LONGITUDINAL LEG SECTION EXTENDING BETWEEN ONE OF SAID END LEG PORTIONS AND THE ADJACENT INTERMEDIATE LEG PORTION, A SECOND LONGITUDINAL LEG SECTION EXTENDING BETWEEN SAID PAIR OF INTERMEDIATE LEG PORTIONS, AN AIR GAP IN THE OTHER OF SAID END LEG PORTIONS AT ONE END OF THE CORE, A SHUNT CORE SECTION LONGITUDINALLY MOVABLE IN SAID GAP, SAID FIRST AND SECOND LONGITUDINAL LEG SECTIONS AND SAID SHUNT CORE SECTION DISPOSED SUBSTANTIALLY NORMAL TO SAID PAIR OF INTERMEDIATE LEG PORTIONS, INDUCTIVELY COUPLED PRIMARY AND SECONDARY WINDINGS FOR PRODUCING A SECONDARY OUTPUT CURRENT POSITIONED ABOUT SAID FIRST AND SECOND LONGITUDINAL LEG SECTIONS AND SAID SHUNT CORE SECTION, AND SAID SHUNT CORE SECTION MOVABLE TOWARD AND AWAY FROM THE OTHER INTERMEDIATE LEG PORTION TO ADJUST THE SECONDARY OUTPUT CURRENT FROM A PREDETERMINED MINIMUM TO A PREDETERMINED MAXIMUM.
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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |