US3676814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature adhesive overcoat for magnet wire
Assignee: Westinghouse Electric Corp
•
Filing: 1970-02-06
•
Granted: 1972-07-11
•
Expires: 1990-02-06
Abstract
Abstract An electrical conductor is coated with a high temperature thermosetting wire enamel base coat and overcoat of an aromatic thermoplastic polysulfone adhesive to form a composite insulated electrical conductor.
Inventors
- 👤 Floyd F Trunzo
- 👤 David A Scheidmantel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:47
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/308; H01B3/307; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/298
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
20 words
The insulated conductor of claim 1 wherein the polysulfone is selected from the group consisting of polysulfones having the formulas:
Claim 2
Dependent Claim
26 words
passing the coated conductor through an oven having a temperature between about 100* C and 430* C, at a uniform speed, to form a solid film;
Claim 3
Dependent Claim
28 words
depositing an adhesive overcoat of aromatic thermoplastic polysulfone resin, having a melting point between 280* C and 260* C, in solution on the base coated conductor; followed by
Claim 4
Dependent Claim
12 words
The insulated conductor of claim 1 wherein the polysulfone has the formula:
Claim 5
Dependent Claim
23 words
repeating step (2) to continuously form a base coated conductor having an overcoat between 0.0,001 and 0.005 inch thick of adhesive; followed by
Claim 6
Dependent Claim
15 words
A transformer coil having a plurality of turns of the insulated conductor of claim 3.
Claim 7
Independent Claim
16 words
A method of making a magnet wire coil for an electrical apparatus comprising the steps of:
Claim 8
Dependent Claim
18 words
winding the composite coated conductor into a coil having a plurality of adjacent contacting conductor turns; and finally
Claim 9
Dependent Claim
22 words
heating the composite coated coil between about 200* to 260* C to fuse the thermoplastic polysulfone overcoats of adjacent conductor turns together.
Claim 10
Dependent Claim
30 words
The method of claim 5 wherein the oven of step (2) has a temperature gradient of between about 100* C at the entrance and about 430* C near the exit.
Claim 11
Dependent Claim
14 words
The method of claim 7 wherein the heating in step (6) is resistance heating.
Claim 12
Dependent Claim
19 words
The method of claim 6 wherein the polysulfone is selected from the group consisting of polysulfones having the formulas:
Claim 13
Dependent Claim
11 words
The method of claim 6 wherein the polysulfone has the formula:
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |