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Patent US3681666A successfully refreshed from Google Patents.
US3681666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitor with extended electrode for support in the container
Assignee: CORNELL-DUBILIER ELECTRONICS Inc
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Filing: 1971-07-06
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Granted: 1972-08-01
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Expires: 1991-07-06
Abstract
Abstract An electrolytic capacitor of wound electrodes and a metal container has an extended-foil cathode. The cover of the container is forced against the top of the wound electrolytic capacitor section, and this is transmitted as pressure of the wound section against the bottom of the container. The forced contact of the extended-foil cathode against the metal container promotes efficient heat dissipation which allows an increased ripple-current rating for the electrolytic capacitor. The construction has excellent resistance to shock and vibration without resort to a deposit of potting compound between the wound section and the container bottom.
Inventors
- 👤 Edward L Bowling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:15
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0003; H01G9/004; H01G9/04; H01G9/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
An electrolytic capacitor, including a metal container having a side wall and a bottom, a cover at the end of the container opposite said bottom, a wound capacitor section in said container, said capacitor section including electrode foils at least one of which is anodically formed, porous dielectric separators between said electrodes, an electrolyte impregnation in said separators, and means providing respective terminal connections to said electrode foils, one of said electrode foils having an edge extending beyond the edges of the other of said electrode foils and said dielectric separators and into contact with the bottom of the metal container, said capacitor having means for applying pressure against the end of the capacitor section nearest the cover and thereby pressing said extending edge of said one foil firmly against said metal container bottom for enhanced heat dissipation, and for resisting endwise displacement of the wound capacitor section in the container in response to mechanical shock.
Claim 2
Dependent Claim
156 words
An electrolytic capacitor, including a metal container having a side wall and a bottom, a cover at the end of the container opposite said bottom, a wound capacitor section in said container, said capacitor section including electrode foils at least one of which is anodically formed, porous dielectric separators between said electrodes, an electrolyte impregnation in said separators, and means providing respective terminal connections to said electrode foils, one of said electrode foils having an edge extending beyond the edges of the other of said electrode foils and said dielectric separators and into contact with the bottom of the metal container, said capacitor having means for applying pressure against the end of the capacitor section nearest the cover and thereby pressing said extending edge of said one foil firmly against said metal container bottom for enhanced heat dissipation, and for resisting endwise displacement of the wound capacitor section in the container in response to mechanical shock.
Claim 3
Dependent Claim
48 words
An electrolytic capacitor in accordance with claim 1, wherein said container includes means secure against lateral shift relative to the container and engaging said capacitor section for inhibiting lateral shift of the wound section relative to the container in response to mechanical shocks imposed on said container laterally.
Claim 4
Dependent Claim
23 words
An electrolytic capacitor in accordance with claim 1, further including an elastic body in compression between said cover and said wound capacitor section.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |