US3675175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage coil assembly for electric induction apparatus
Assignee: General Electric Co
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Filing: 1971-05-10
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Granted: 1972-07-04
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Expires: 1991-05-10
Abstract
Abstract In a high voltage winding assembly of the balanced multi-layer type, axially juxtaposed winding sections each having a line terminal connected to its outermost coil layer are connected in series circuit relation at their innermost coil layers and wound upon a common supporting cylinder of wrapped insulating material. Interwound in the supporting cylinder are a plurality of radially spaced shielding sleeves of electrically conductive material, and at opposite ends of the winding each sleeve is flared radially outward and over opposite ends of the winding to connect with one of a series of axially spaced apart shielding rings. The radially innermost shielding sleeve is connected to ground and the radially outermost shielding sleeve is connected to the winding midpoint between the serially connected, balanced winding sections.
Inventors
- 👤 John C Dutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:43
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/324; H01F27/34; H01F27/36; H01F27/363
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
In a high voltage winding assembly for electric induction apparatus, a supporting cylinder of insulating material including at least three shielding sleeves of electric conducting material in radially spaced apart relation, said sleeves being split axially to form capacitively coupled electrostatic shields between inner and outer surfaces of said insulating cylinder, a two-section multiple layer helical winding on said cylinder, each winding section comprising a plurality of concentric helical coils connected in series circuit relation, said winding sections having a series circuit connection between the juxtaposed ends of their radially innermost coils and each section having a high voltage line terminal at its other end, said shielding sleeves extending axially beyond and being radially flared outwardly over opposite ends of said innermost coils, and means electrically connecting said series circuit connection to the radially outermost shielded sleeve.
Claim 2
Dependent Claim
137 words
In a high voltage winding assembly for electric induction apparatus, a supporting cylinder of insulating material including at least three shielding sleeves of electric conducting material in radially spaced apart relation, said sleeves being split axially to form capacitively coupled electrostatic shields between inner and outer surfaces of said insulating cylinder, a two-section multiple layer helical winding on said cylinder, each winding section comprising a plurality of concentric helical coils connected in series circuit relation, said winding sections having a series circuit connection between the juxtaposed ends of their radially innermost coils and each section having a high voltage line terminal at its other end, said shielding sleeves extending axially beyond and being radially flared outwardly over opposite ends of said innermost coils, and means electrically connecting said series circuit connection to the radially outermost shielded sleeve.
Claim 3
Dependent Claim
75 words
A winding assembly according to claim 1 including in combination, a plurality of split shielding rings of electrically conductive material disposed in axial spaced relation on said insulating cylinder adjacent the axially remote ends of said winding sections, said shielding rings at each axial end of said winding being electrically connected to said shielding sleeves in consecutive order with the radially outermost sleeve being connected to the rings immediately adjacent opposite ends of said winding.
Claim 4
Dependent Claim
30 words
In combination with the winding assembly of claim 1, a grounded magnetizable core disposed within said supporting cylinder, and means electrically connecting the radially innermost shielding sleeve to said core.
Claim 5
Dependent Claim
22 words
In a winding assembly according to claim 1, the combination of means electrically connecting the radially innermost shielding sleeve to ground potential.
Claim 6
Dependent Claim
38 words
A winding assembly according to claim 2 in which said shielding sleeves are of progressively less axial length in radially outer positions and said shielding rings are formed as annular lips at opposite ends of each said sleeve.
Claim 7
Dependent Claim
20 words
The winding assembly according to claim 5 in which said shielding rings are individually insulated on all external peripheral surfaces.
Claim 8
Dependent Claim
32 words
A winding assembly according to claim 5 in which said shielding rings are formed of electrically conducting elastomeric material and encircle opposite ends of each said shielding sleeve in resilient contacting engagement.
Claim 9
Dependent Claim
36 words
A winding assembly according to claim 1 wherein said supporting cylinder is formed of wound insulating sheet material and said shielding sleeves are formed as interwound layers of conducting sheet material in concentric radially spaced relation.
Claim 10
Dependent Claim
27 words
A winding assembly according to claim 8 wherein each said shielding sleeve comprises a single peripheral layer of electrical conducting paint applied to said insulating sheet materiaL.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |