US4320437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor with edge coated electrode
Assignee: General Electric Co
•
Filing: 1980-06-23
•
Granted: 1982-03-16
•
Expires: 2000-06-23
Abstract
Abstract A roll section for an electrical capacitor comprises a wound composite of alternate strips of polypropylene and aluminum foil with narrow bands of a dielectric coating along the longitudinal edges of the aluminum strips. The coated edges may also be folded for optimum results.
Inventors
- 👤 David G. Shaw
- 👤 Angelo Yializis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:09
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
An electrical capacitor of the high voltage power factor correction type comprising in combination (a) a casing (b) at least one capacitor roll section in said casing (c) said roll section comprising a pair of spaced thin aluminum electrode foil strips and an intermediate dielectric strip all wound in roll form (d) and a dielectric liquid of a predetermined dielectric constant in said casing and impregnating said capacitor roll section. (e) the said dielectric strip consisting solely of one or more synthetic resin strips of a dielectric constant below about 3 (f) said dielectric fluid having a dielectric constant below about 3 (g) at least one of said electrode foils having a narrow, thin band of a solid dielectric polymer material thereon which covers the edge on both sides thereof and being an essentially smooth unbroken and continuous layer (h) the thickness of said polymer being in the range of 0.06 mil (1.5 u) to 0.2 mil (5 u).
Claim 2
Dependent Claim
159 words
An electrical capacitor of the high voltage power factor correction type comprising in combination (a) a casing (b) at least one capacitor roll section in said casing (c) said roll section comprising a pair of spaced thin aluminum electrode foil strips and an intermediate dielectric strip all wound in roll form (d) and a dielectric liquid of a predetermined dielectric constant in said casing and impregnating said capacitor roll section. (e) the said dielectric strip consisting solely of one or more synthetic resin strips of a dielectric constant below about 3 (f) said dielectric fluid having a dielectric constant below about 3 (g) at least one of said electrode foils having a narrow, thin band of a solid dielectric polymer material thereon which covers the edge on both sides thereof and being an essentially smooth unbroken and continuous layer (h) the thickness of said polymer being in the range of 0.06 mil (1.5 u) to 0.2 mil (5 u).
Claim 3
Dependent Claim
24 words
The invention as recited in claim 1 wherein said dielectric strip has a dielectric constant and dielectric strength higher than that of the liquid.
Claim 4
Dependent Claim
14 words
The invention as recited in claim 1 wherein the polymer is a cured polymer.
Claim 5
Dependent Claim
24 words
The invention as recited in claim 1 wherein the dielectric coating has a dielectric constant high than that of the fluid or dielectric strip.
Claim 6
Dependent Claim
16 words
The invention as recited in claim 1 wherein both longitudinal edges of one foil are coated.
Claim 7
Dependent Claim
16 words
The invention as recited in claim 5 wherein both said coated longitudinal edges are buried edges.
Claim 8
Dependent Claim
22 words
The invention as recited in claim 5 wherein one longitudinal edge on each foil is coated and said edges are buried edges.
Claim 9
Dependent Claim
38 words
The invention as recited in claim 1 wherein the said one edge having the said narrow band of coating is an edge folded in U shape, and the coating is on the outside only of the U shape.
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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) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |