US3662199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage insulated coil and machine utilizing the same
Assignee: Portec Inc
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Filing: 1971-03-01
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Granted: 1972-05-09
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Expires: 1991-03-01
Abstract
Abstract An improved insulated coil for an electrodynamic machine is prepared by wrapping multiple layers of a wide insulative wrapper impregnated with a B-staged resin bonding material around the straight section of the coil, in overlapping contact with a narrow insulative tape impregnated with the identical or a chemically compatible B-staged resin bonding material. The tape is overlapped with the ends of the wide wrapper and the wrapped assembly is then heat and pressure treated to cure the resin impregnate to a permanent, solid set and to form thereby an insulated coil with a continuous, unitary insulative joint between the wrapper and the tape.
Inventors
- 👤 Robert L Anderson
- 👤 Marvin M Fromm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:12
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K15/00; H02K15/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
26 words
The coil of claim 1 wherein said wrapper is of a width sufficient to cover substantially the entire length of said straight section of said coil.
Claim 2
Dependent Claim
27 words
The coil of claim 1 wherein said wrapper is of a width sufficient to cover at least about one-third of the entire length of said straight section.
Claim 3
Dependent Claim
16 words
An improved electrodynamic machine, the improvement comprising the coils of claim 1 contained within said machine.
Claim 4
Dependent Claim
17 words
The coil of claim 2 wherein said wrapper B-staged resin and said tape B-staged resin are identical.
Claim 5
Dependent Claim
22 words
The coil of claim 2 wherein said B-staged resins are selected from the class of epoxy resins, polyester resins and mixtures thereof.
Claim 6
Dependent Claim
17 words
The coil of claim 2 wherein said wrapper and said tape contain mica as an insulating medium.
Claim 7
Dependent Claim
28 words
The coil of claim 7 wherein said mica comprises at least 50 percent by weight of said wrapper and at least 50 percent by weight of said tape.
Claim 8
Dependent Claim
44 words
The coil of claim 2 wherein said return bent portion of said coil includes a knuckle portion, and said knuckle portion has wrapped along at least a portion of its length a fully cured tape which is contiguous to said B-staged resin impregnated tape.
Claim 9
Dependent Claim
44 words
The coil of claim 2 wherein said wrapper is telescoped at the edges thereof so that successive widths of diMinishing numbers of layers of wrapper appear at each end thereof, and said tape is in overlapping relationship to said telescoped ends of said wrapper.
Claim 10
Dependent Claim
117 words
An electrodynamic machine having one or more insulated coils contained therein, each of said coils comprising one or more straight sections and one or more return-bent sections, an insulative wrapping on said coil, said wrapping comprising the finish cured product of one or more turns of B-staged resin impregnated wrapper of a width sufficient to substantially cover the entire length of said straight section of said coil, and one or more turns of the finish cured product of B-staged resin impregnated tape wrapped around a portion at least of said return-bent portion, said wrapper and said tape being in overlapping relationship at their respective edges, said wrapper and tape resins being chemically compatible, one with the other.
Claim 11
Dependent Claim
18 words
The machine of claim 11 wherein the B-staged resins of said wrapper and said tape are identical resins.
Claim 12
Dependent Claim
21 words
The machine of claim 11 wherein the cured-resin compounds are selected from the class consisting of epoxy, polyester, and mixtures thereof.
Claim 13
Dependent Claim
14 words
The machine of claim 11 further including layers of finishing tape over said wrapping.
Claim 14
Dependent Claim
17 words
The machine of claim 14 further including a varnished coating baked onto said layers of finishing tape.
Claim 15
Dependent Claim
40 words
The machine of claim 11 wherein said return bent sections have knuckle portions and said knuckle portions have wrapped along at least a portion of their length a fully cured tape which is contiguous to said B-staged resin impregnated tape.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |