Patent US4392070A successfully refreshed from Google Patents.
US4392070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated coil assembly and method of making same
Assignee: General Electric Co
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Filing: 1981-04-16
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Granted: 1983-07-05
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Expires: 2001-04-16
Abstract
Abstract An insulated field pole coil assembly for a dynamoelectric machine characterized by including an open-weave glass tape wound in half-lapped fashion around the energizing coil of magnet wire on the pole and coated with a continuous, void-free, crack-resistant dipping compound that is supported by the strands of the tape. In the method of the invention a coil is wound with lapped open-weave tape and immersed in dipping compound which is supported by the tape strands while the compound is cured, and thereafter, to form a crack-resistant, continuous insulating coating around the coil.
Inventors
- 👤 Joseph J. Zdaniewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:55
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/325; H02K15/00; H02K15/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
119 words
An insulated coil assembly for a field pole of a dynamoelectric machine, said coil assembly comprising; a coil of conductive wire coated with an insulating varnish and arranged to define a multi-side window for receiving therein a portion of a field pole, a lapped layer of open-weave glass fiber tape positioned snuggly around each of the respective sides of said coil to entirely cover the coil, and a substantially void free, continuous, crack-resistant, thermoset dipping compound that is thermally stable in a range of temperature from -50° C. to 150° C., forming a cured solid ringing coating that is generally uniformly distributed over the surface of the coil and is supported in a generally uniform thickness by said tape.
Claim 2
Dependent Claim
119 words
An insulated coil assembly for a field pole of a dynamoelectric machine, said coil assembly comprising; a coil of conductive wire coated with an insulating varnish and arranged to define a multi-side window for receiving therein a portion of a field pole, a lapped layer of open-weave glass fiber tape positioned snuggly around each of the respective sides of said coil to entirely cover the coil, and a substantially void free, continuous, crack-resistant, thermoset dipping compound that is thermally stable in a range of temperature from -50° C. to 150° C., forming a cured solid ringing coating that is generally uniformly distributed over the surface of the coil and is supported in a generally uniform thickness by said tape.
Claim 3
Dependent Claim
26 words
An invention as defined in claim 1 wherein said lapped layer of tape consists of a single half-lapped layer of substantially uniformly spaced turns of tape.
Claim 4
Dependent Claim
16 words
An invention as defined in claim 2 wherein said dipping compound is a thixotropic epoxy resin.
Claim 5
Dependent Claim
27 words
An invention as defined in claim 1 wherein said dipping compound is taken from a class of dipping compounds, including: polyamides, polyesters, silicones, polyetherimides, polyimides and polyurethanes.
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |