US4403393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerated aging-impregnation of electrolytic capacitors
Assignee: Sprague Electric Co
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Filing: 1981-10-23
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Granted: 1983-09-13
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Expires: 2001-10-23
Abstract
Abstract A process for the accelerated aging and impregnation of electrolytic capacitors having formed anodes is carried out in two stages. In the first stage, the capacitors are loaded into a centrifuge, a voltage less than final aging voltage is applied, the pressure within the centrifuge is reduced, the centrifuge is started, and then electrolyte is admitted to impregnate the capacitors. When the capacitors are fully impregnated, the aging voltage is increased to the desired final value.
Inventors
- 👤 Giacomo Giacomello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:45
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/0029
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A two-stage process for accelerated aging and impregnating electrolytic capacitors comprising a first stage sequence of first loading capacitors having formed anodes into a centrifuge, second supplying a voltage less than the desired final aging voltage to said capacitors, third reducing pressure within said centrifuge, fourth starting said centrifuge, fifth admitting impregnating electrolyte, and aging said capacitors while centrifuging and impregnating until said capacitors are fully impregnated, and a second stage of increasing said voltage to said desired aging voltage.
Claim 2
Dependent Claim
80 words
A two-stage process for accelerated aging and impregnating electrolytic capacitors comprising a first stage sequence of first loading capacitors having formed anodes into a centrifuge, second supplying a voltage less than the desired final aging voltage to said capacitors, third reducing pressure within said centrifuge, fourth starting said centrifuge, fifth admitting impregnating electrolyte, and aging said capacitors while centrifuging and impregnating until said capacitors are fully impregnated, and a second stage of increasing said voltage to said desired aging voltage.
Claim 3
Dependent Claim
28 words
A process according to claim 1 wherein when said aging is almost complete, atmospheric pressure is reestablished within said centrifuge, and said aging is completed at atmospheric pressure.
Claim 4
Dependent Claim
28 words
A process according to claim 2 wherein said centrifuging and application of said aging voltage is continued for an additional period with said capacitors at constant internal temperature.
Claim 5
Dependent Claim
22 words
A process according to claim 1 wherein said pressure is reduced to 50 torr or less before said impregnating electrolyte is admitted.
Claim 6
Dependent Claim
18 words
A process according to claim 1 wherein said voltage initially applied is 80% of said final aging voltage.
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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |