Patent US3689811A successfully refreshed from Google Patents.
US3689811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage capacitor
Assignee: Individual
•
Filing: 1971-10-21
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Granted: 1972-09-05
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Expires: 1991-10-21
Abstract
Abstract A high energy density, high voltage capacitor. The capacitor comprises a plurality of stacked capacitor winding sections having tab connectors extending completely through the windings and folded back adjacent opposed sides of the windings. The winding sections with the tab connectors are stacked and compressed to series connect the sections. The sections are impregnated with a scavenger-type dielectric fluid and are encapsulated in a solid organopolymeric body.
Inventors
- 👤 Paul Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:52
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/228; H01G4/242; H01G4/245
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
A high energy density, high voltage capacitor comprising, in combination, an electrode and dielectric assembly which is impregnated with a scavenger type dielectric fluid, said assembly comprising a plurality of stacked capacitor winding sections having tab connectors extending completely through said sections longitudinally of their respective winding axes and folded back adjacent opposed respective exterior sides of said winding sections, said capacitor winding sections being stacked such that adjacent tab connectors of adjacent stacked capacitor winding sections are in electrical contact between said adjacent winding sections to thereby result in series connection of the stacked capacitor winding sections, a solid organopolymeric body encapsulating said assembly and which is compatible with said dielectric fluid, terminal means for providing external electrical connection with said assembly through said organopolymeric body, and means for compressing said stacked capacitor winding sections longitudinally of their staCking axis.
Claim 2
Dependent Claim
141 words
A high energy density, high voltage capacitor comprising, in combination, an electrode and dielectric assembly which is impregnated with a scavenger type dielectric fluid, said assembly comprising a plurality of stacked capacitor winding sections having tab connectors extending completely through said sections longitudinally of their respective winding axes and folded back adjacent opposed respective exterior sides of said winding sections, said capacitor winding sections being stacked such that adjacent tab connectors of adjacent stacked capacitor winding sections are in electrical contact between said adjacent winding sections to thereby result in series connection of the stacked capacitor winding sections, a solid organopolymeric body encapsulating said assembly and which is compatible with said dielectric fluid, terminal means for providing external electrical connection with said assembly through said organopolymeric body, and means for compressing said stacked capacitor winding sections longitudinally of their staCking axis.
Claim 3
Dependent Claim
22 words
A capacitor in accordance with claim 1 wherein said dielectric fluid is castor oil and wherein said organopolymeric body is polyurethane plastic.
Claim 4
Dependent Claim
49 words
A capacitor in accordance with claim 2 wherein said capacitor winding sections are generally rectangular, flattened windings comprising two thin aluminum electrode strips wound with two insulating dielectric interlayers separating said electrode strips which are wider and longer than said electrode strips to provide insulating margins about said strips.
Claim 5
Dependent Claim
74 words
A capacitor in accordance with claim 3 wherein said tab connectors are elongated metal sheets which are laid in at the midpoints of said electrode strips of said winding sections to minimize inductive effects of current flow, and wherein said elongated sheets are folded back at both margin ends of said capacitor winding sections to provide said electrode and dielectric assembly with a double current path through said stacked, series connected capacitor winding sections.
Claim 6
Dependent Claim
59 words
A capacitor in accordance with claim 4 wherein said means for compressing said stacked sections includes a plurality of compression rods longitudinally about said assembly and end plates in connection with said rods and adjacent the ends of said assembly, said rods being under tension such that a compressive force is exerted upon said assembly through said end plates.
Claim 7
Dependent Claim
59 words
A capacitor in accordance with claim 5 wherein said capacitor winding sections are stacked in a plurality of subassembly units each comprising a plurality of said capacitor winding sections, and wherein levelling plates slidably mounted on said compression rods are located between said subassembly units to maintain alignment of said stacked, compressed capacitor winding sections in said subassembly units.
Claim 8
Dependent Claim
29 words
A capacitor in accordance with claim 6 wherein there is less than about 1 percent by volume of air or void space in said impregnated electrode and dielectric assembly.
References Cited (Backward Citations)
GB270241A
Cited
US2531185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |