Patent US3867758A successfully refreshed from Google Patents.
US3867758A
Expired / Lapsed
US
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Method of making glass insulated electrical coils
Assignee: ANAMAG Inc A CORP OF DE
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Filing: 1974-05-15
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Granted: 1975-02-25
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Expires: 1994-05-15
Abstract
Abstract In the manufacture of glass insulated coils, the wire is not enameled until the coil has been formed. The wire is insulated with tapes separated from a wide band formed by enameling and baking a large plurality of parallel glass fibers.
Inventors
- 👤 Daniel B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:07
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/12; H01F41/122; H01B; H01B13/00; H01B13/06; H01B13/08; H01B13/0883; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
The method of making an electrical coil comprising the steps of; A. drawing a length of wire to a preselected cross-sectional area and shape, B. supporting a large plurality of continuous glass fibers adjacently positioned in substantially planar configuration and advancing said fibers through enamel-coating apparatus, thereby coating said fibers with a continuous film of said enamel, C. passing said fibers through a baking zone, thereby drying said enamel and forming a wide band of longitudinally glassfiber-reinforced enamel insulation, D. dividing said band into a plurality of individual tapes, E. helically wrapping said tapes around a continuous bare length of said wire to form insulated conductor, F. winding said conductor into an electrical coil, G. saturating said coil with insulating enamel, H. baking said coil being coated with said enamel.
Claim 2
Independent Claim
130 words
The method of making an electrical coil comprising the steps of; A. drawing a length of wire to a preselected cross-sectional area and shape, B. supporting a large plurality of continuous glass fibers adjacently positioned in substantially planar configuration and advancing said fibers through enamel-coating apparatus, thereby coating said fibers with a continuous film of said enamel, C. passing said fibers through a baking zone, thereby drying said enamel and forming a wide band of longitudinally glassfiber-reinforced enamel insulation, D. dividing said band into a plurality of individual tapes, E. helically wrapping said tapes around a continuous bare length of said wire to form insulated conductor, F. winding said conductor into an electrical coil, G. saturating said coil with insulating enamel, H. baking said coil being coated with said enamel.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said enamel saturating said coil has substantially the same polymeric composition as said enamel coating said fibers.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said enamel coating said fibers is applied in solution.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said enamel coating said fibers is applied free from solvent.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |