Patent US3174085A successfully refreshed from Google Patents.
US3174085A
Expired / Lapsed
US
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Capacitor construction
Assignee: Sprague Electric Co
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Filing: 1960-01-11
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Granted: 1965-03-16
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Expires: 1980-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter W Schroeder
- 👤 William A Owczarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:20
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G4/236; H01G13/00; H01G13/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A WELDED CAPACITOR COMPRISING A METAL CAN HOUSING HAVING AN OPEN END, A FIRST EXTERNAL LEAD WELDED TO THE HOUSING EXTERIOR, A CAPACITANCE UNIT WITHIN THE HOUSING, A HARD BUSHING OF INSULATING MATERIAL POSITION WITHIN THE OPEN END OF THE HOUSING FOR SEALING OFF THE HOUSING, A CIRCUMFERENTIALLY EXTENDING INDENT IN THE SURFACE OF THE BUSHING, A RESILIENT O-RING SEATED IN THE INDENT WHICH FORMS A SEAL BETWEEN THE CAN AND THE BUSHING, AN INWARDLY DEPRESSED AREA IN THE CAN WALL WHICH IS URGED AGAINST THE O-RING, A CONDUCTOR PLUG SUBSTANTIALLY EMBEDDED WITHIN THE BUSHING, SAID PLUG HAVING CIRCUMFERENTIAL LOCKING GROOVES FILLED BY SAID BUSHING, AN EXTERNAL LEAD WELDED TO THE OUTER SURFACE OF THE PLUG, A FOLDED TAB-TYPE TERMINAL OF VALVE METAL FOR ONE OF THE ELECTRODES OF THE CAPACITANCE UNIT BEING WELDED TO THE INSIDE OF THE CAN SURFACE OPPOSITE THE FIRST EXTERNAL LEAD, AND A SECOND FOLDED TAB-TYPE TERMINAL OF VALVE METAL FOR THE OTHER ELECTRODE OF THE CAPACITANCE UNIT WHICH TERMINAL IS WELDED TO THE INNER SURFACE OF SAID CONDUCTOR PLUG.
Claim 2
Dependent Claim
175 words
A WELDED CAPACITOR COMPRISING A METAL CAN HOUSING HAVING AN OPEN END, A FIRST EXTERNAL LEAD WELDED TO THE HOUSING EXTERIOR, A CAPACITANCE UNIT WITHIN THE HOUSING, A HARD BUSHING OF INSULATING MATERIAL POSITION WITHIN THE OPEN END OF THE HOUSING FOR SEALING OFF THE HOUSING, A CIRCUMFERENTIALLY EXTENDING INDENT IN THE SURFACE OF THE BUSHING, A RESILIENT O-RING SEATED IN THE INDENT WHICH FORMS A SEAL BETWEEN THE CAN AND THE BUSHING, AN INWARDLY DEPRESSED AREA IN THE CAN WALL WHICH IS URGED AGAINST THE O-RING, A CONDUCTOR PLUG SUBSTANTIALLY EMBEDDED WITHIN THE BUSHING, SAID PLUG HAVING CIRCUMFERENTIAL LOCKING GROOVES FILLED BY SAID BUSHING, AN EXTERNAL LEAD WELDED TO THE OUTER SURFACE OF THE PLUG, A FOLDED TAB-TYPE TERMINAL OF VALVE METAL FOR ONE OF THE ELECTRODES OF THE CAPACITANCE UNIT BEING WELDED TO THE INSIDE OF THE CAN SURFACE OPPOSITE THE FIRST EXTERNAL LEAD, AND A SECOND FOLDED TAB-TYPE TERMINAL OF VALVE METAL FOR THE OTHER ELECTRODE OF THE CAPACITANCE UNIT WHICH TERMINAL IS WELDED TO THE INNER SURFACE OF SAID CONDUCTOR PLUG.
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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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |