US3210702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Potted welding transformer with a tap switch
Assignee: Kirkhof Manufacturing Corp
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Filing: 1963-05-22
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Granted: 1965-10-05
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Expires: 1983-05-22
Abstract
No abstract record available.
Inventors
- 👤 William H Carrigan
- 👤 Jr William G Emaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:30
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
151 words
A DISPOSABLE WELDING TRANSFORMER, COMPRISING: A PERIPHERAL CASING HAVING BOTH UPPER AND LOWER ENDS OPEN; A LOWER SUPPORT RING AFFIXED TO THE INSIDE OF SAID CASING ADJACENT TO BUT SPACED FROM SAID LOWER END; PRIMARY COILS RESTING ON SAID SUPPORT RING; CAST METAL SECONDARY COILS POSITIONED INSIDE SAID PRIMARRY COILS AND INCLUDING TERMINAL PADS PROJECTING OUT OF SAID TRANSFORMER THROUGH AND BELOW THE LOWER END OF SAID CASING; AN UPPER RING AFFIXED TO THE INSIDE OF SAID CASING; AN UPPER RING TAP SWITCH MOUNTED ON THE UPPER END OF SAID CASING SPACED FROM SAID UPPER RING AND CLOSING SAID UPPER END; ELECTRICAL LEADS EXTENDING FROM SAID PRIMARY COILS UP TO SAID TAP SWITCH; AND A THERMOSETTING RESIN FORMING THE BOTTOM OF SAID CASING, FILLING SAID CASING, PENETRATING AND ENCAPSULATING SAID COILS, FIRMLY ANCHORING SAID TERMINAL PADS, EMBEDDING AND ANCHORING SAID LEADS, AND BONDED TO SAID TAP SWITCH TO INTEGRATE THE ASSEMBLY.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |