Patent US3746953A successfully refreshed from Google Patents.
US3746953A
Expired / Lapsed
US
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Electrical capacitor
Assignee: Cooper Industries LLC
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Filing: 1972-05-19
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Granted: 1973-07-17
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Expires: 1992-05-19
Abstract
Abstract A power factor correction capacitor is constructed of several capacitor packs, each having convolutely wound layers of aluminum foil and polypropylene film with two layers of polypropylene film between the layers of foil. The several capacitor packs are assembled into a case and impregnated with trichlorodiphenyl with a bis (3, 4-epoxy-6-methylcyclohexylmethyl) adipate as an additive. During the winding process the foil is deformed by a deforming roller rolled against the roll of foil as it is wound into the capacitor pack.
Inventors
- 👤 J Lapp
- 👤 N Weiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:30
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22
Claims Analysis
Total Claims: 56
Claim 1
Independent Claim
17 words
A capacitor according to claim 1 wherein said dielectric layers each comprise a strip of insulating film.
Claim 2
Dependent Claim
16 words
A capacitor according to claim 2 wherein said insulating film strip is a polypropylene film strip.
Claim 3
Dependent Claim
18 words
A capacitor according to claim 1 wherein said dielectric layers each comprise two adjacent strips of polypropylene film.
Claim 4
Dependent Claim
15 words
A capacitor according to claim 4 wherein said conductive strips are strips of metallic foil.
Claim 5
Dependent Claim
15 words
A capacitor according to claim 4 wherein said conductive strips are strips of aluminum foil.
Claim 6
Dependent Claim
17 words
A capacitor according to claim 1 wherein both of said conductive strips have said randomly sized deformations.
Claim 7
Dependent Claim
28 words
A capacitor according to claim 7 wherein said deformations comprise a substantially random combination of smaller indentations, larger indentations, and indentations of sufficient depth to just produce perforations.
Claim 8
Dependent Claim
23 words
A capacitor according to claim 7 wherein said indentations vary in depth up to a maximum of about the magnitude of 6 mils.
Claim 9
Dependent Claim
27 words
A capacitor according to claim 7 wherein said indentations are randomly placed along linear rows a distance apart of about the magnitude of one-fourteenth of an inch.
Claim 10
Dependent Claim
20 words
A capacitor according to claim 7 wherein at least some indentations are of sufficient depth to just barely produce perforations.
Claim 11
Dependent Claim
19 words
A capacitor according to claim 7 wherein said dielectric layers each comprise a strip of insulating dielectric polymeric film.
Claim 12
Dependent Claim
16 words
A capacitor according to claim 12 wherein said insulating film strip is a polypropylene film strip.
Claim 13
Dependent Claim
20 words
A capacitor according to claim 12 wherein said dielectric layers each comprise two adjacent strips of a dielectric polymeric film.
Claim 14
Dependent Claim
12 words
A capacitor according to claim 14 wherein said dielectric film is polypropylene.
Claim 15
Dependent Claim
28 words
A capacitor according to claim 13 wherein said deformations comprise a substantially random combination of smaller indentations, larger indentations, and indentations of sufficient length to just produce perforations.
Claim 16
Dependent Claim
23 words
A capacitor according to claim 16 wherein said indentations vary in depth up to a maximum of about the magnitude of 6 mils.
Claim 17
Dependent Claim
27 words
A capacitor according to claim 17 wherein said indentations are randomly placed along linear rows a distance apart of about the magnitude of one-fourteenth of an inch.
Claim 18
Dependent Claim
18 words
A capacitor according to claim 18 wherein said dielectric layers each comprise two adjacent strips of polypropylene film.
Claim 19
Dependent Claim
15 words
A capacitor according to claim 13 wherein said conductive strips are strips of metallic foil.
Claim 20
Dependent Claim
15 words
A capacitor according to claim 20 wherein said conductive strips are strips of aluminum foil.
Claim 21
Dependent Claim
18 words
A capacitor according to claim 21 wherein said dielectric layers each comprise two adjacent strips of polypropylene film.
Claim 22
Dependent Claim
29 words
A capacitor according to claim 13 wherein at least some indentations are of sufficient depth to produce perforations of random size up to a maximum of about pinhole size.
Claim 23
Dependent Claim
15 words
A capacitor according to claim 23 wherein said conductive strips are strips of metallic foil.
Claim 24
Dependent Claim
15 words
A capacitor according to claim 23 wherein said conductive strips are strips of aluminum foil.
Claim 25
Dependent Claim
14 words
A capacitor according to claim 7 wherein said dielectric liquid comprises a stabilizing additive.
Claim 26
Dependent Claim
21 words
A capacitor according to claim 7 wherein said dielectric liquid is a halogenated aromatic compound and said additive is an epoxide.
Claim 27
Dependent Claim
20 words
A capacitor according to claim 6 wherein said dielectric liquid is trichlorodiphenyl and said additive is bis (3, 4-epoxy-6-methylcyclohexylmethyl) adipate.
Claim 28
Dependent Claim
115 words
A capacitor comprising: a casing; a capacitor pack within the casing having two conductive strips of foil and two dielectric layers alternately wound to form the capacitor pack with at least one of the conductive strips of foil having randomly sized deformations formed by applying a deforming roller against a roll of the conductive foil with a selected force and rolling said deforming roller against said roll of foil as said foil is rolled off said roll, said deforming roller having selectively positioned raised points adapted to push deformations into said foil through several layers of foil on said roll upon the application of said selected force; and a dielectric liquid impregnating the capacitor pack.
Claim 29
Dependent Claim
22 words
A capacitor according to claim 26 wherein said dielectric layers are comprised of at least one strip of a dielectric polymeric film.
Claim 30
Dependent Claim
18 words
A capacitor according to claim 29 wherein said dielectric layers each comprise two adjacent strips of polypropylene film.
Claim 31
Dependent Claim
17 words
A capacitor according to claim 29 wherein both of said conductive strips have said randomly sized deformations.
Claim 32
Dependent Claim
19 words
A capacitor according to claim 32 wherein said dielectric liquid comprises a halogenated aromatic compound and a stabilizing additive.
Claim 33
Dependent Claim
18 words
A capacitor according to claim 32 wherein said dielectric liquid comprises a chlorinated diphenyl and an epoxide additive.
Claim 34
Dependent Claim
20 words
A capacitor according to claim 34 wherein said chlorinated diphenyl is trichlorodiphenyl and said additive is bis (3, 4-epoxy-6-methylcyclohexylmethyl) adipate.
Claim 35
Dependent Claim
50 words
A capacitor according to claim 32 wherein said deforming roller has the raised points equally spaced apart from each other to produce rows of indentations in the foil in the direction of rotation of the roll with said rows spaced apart from each other by about one-fourteenth of an inch.
Claim 36
Dependent Claim
56 words
A capacitor according to claim 36 wherein said deforming roller comprises equally spaced spiral grooves having a selected negative pitch and equally spaced spiral grooves having a positive pitch and intersecting the other set of grooves at an angle with said grooves having a slope selected to leave pyramidal-shaped points between the intersections of the grooves.
Claim 37
Dependent Claim
23 words
A capacitor according to claim 37 wherein said selected force is selected to produce maximum indentations of about the magnitude of 6 mils.
Claim 38
Dependent Claim
32 words
A capacitor according to claim 38 wherein said selected force and raised points are selected to produce a random selection of maximum sized indentations, smaller sized indentations, and indentations resulting in perforations.
Claim 39
Dependent Claim
30 words
A capacitor according to claim 39 wherein said selected force is selected to produce indentations of sufficient depth to perforate the foil in about 20 per cent of the indentations.
Claim 40
Dependent Claim
22 words
A capacitor according to claim 40 wherein some of said perforations are of a maximum size about that of a pinhole size.
Claim 41
Dependent Claim
18 words
A capacitor according to claim 41 wherein said dielectric layers are comprised of a strip of polypropylene film.
Claim 42
Dependent Claim
18 words
A capacitor according to claim 41 wherein said dielectric layers each comprise two adjacent strips of polypropylene film.
Claim 43
Dependent Claim
24 words
A capacitor according to claim 37 wherein said selected force is selected to produce a maximum indentation of about the magnitude of 6 mils.
Claim 44
Dependent Claim
30 words
A capacitor according to claim 44 wherein said selected force is selected to produce indentations of sufficient depth to perforate the foil in about 20 per cent of the indentations.
Claim 45
Dependent Claim
50 words
A capacitor according to claim 32 wherein said deforming roller has the raised points equally spaced aPart from each other to produce rows of indentations in the foil in the direction of rotation of the roll with said rows spaced apart from each other by about one-fourteenth of an inch.
Claim 46
Dependent Claim
20 words
A capacitor according to claim 46 wherein said perforations are of a maximum size about that of a pinhole size.
Claim 47
Dependent Claim
41 words
A capacitor according to claim 45 wherein said deforming roller has the raised points spaced apart from each other to produce rows of indentations in the foil with said rows spaced apart from each other by about one-fourteenth of an inch.
Claim 48
Dependent Claim
30 words
A capacitor according to claim 48 wherein said selected force is selected to produce indentations of sufficient depth to perforate the foil in about 20 per cent of the indentations.
Claim 49
Dependent Claim
52 words
A capacitor according to claim 49 wherein said dielectric layers are each comprised of a strip of polypropylene film. 51. A capacitor according to claim 35 wherein said selected force and raised points are selected to produce a random selection of maximum sized indentations, smaller sized indentations, and indentations resulting in perforations.
Claim 50
Dependent Claim
19 words
A capacitor according to claim 51 wherein said dielectric layers each comprise a sheet of a dielectric polymeric film.
Claim 51
Dependent Claim
17 words
A capacitor according to claim 51 wherein said dielectric layers each comprise two strips of polypropylene film.
Claim 52
Dependent Claim
30 words
A capacitor according to claim 51 wherein said selected force is selected to produce indentations of sufficient depth to perforate the foil in about 20 per cent of the indentations.
Claim 53
Dependent Claim
22 words
A capacitor according to claim 54 wherein some of said perforations are of a maximum size about that of a pinhole size.
Claim 54
Dependent Claim
30 words
A capacitor according to claim 32 wherein said selected force is selected to produce indentations of sufficient depth to perforate the foil in about 20 per cent of the indentations.
Claim 55
Dependent Claim
22 words
A capacitor according to claim 56 wherein some of said perforations are of a maximum size about that of a pinhole size.
Claim 56
Dependent Claim
17 words
A capacitor according to claim 57 wherein said dielectric layers each comprise a sheet of polypropylene film.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |