US3902147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air core duplex reactor
Assignee: Trench Electric Ltd
•
Filing: 1973-12-21
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Granted: 1975-08-26
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Expires: 1993-12-21
Abstract
Abstract An air core duplex reactor consisting of one, two or more sets of two rigid cylindrical coil assemblies disposed in concentric, radially spaced relation. All of the coils are electrically connected in parallel at one end and have individual connections for the respective sets of coils at the opposite end, one set of coils being interleaved with the other and each coil consisting of a rigid, longitudinally extending sleeve member having a coil wound on a portion of the length thereof extending from adjacent the parallel connected end in a direction toward the opposite end. The sleeve extends beyond the end of the coil to the individual connections, thereby providing insulation against arcing. Each coil member is relatively thin and spaced closely adjacent one another providing a coupling factor of up to at least 85 percent. The rigid coil is provided by a resinous material and, preferably, is glass reinforced. Barrier insulation may be provided in one or more of the coils and such barrier insulation extends from adjacent the individual connections for the coils in a direction toward the opposite end overlapping a portion of the coil associated therewith.
Inventors
- 👤 Anthony B Trench
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:53
CPC Classifications
H; H01; H01F; H01F37/00; H01F37/005; H01F27/00; H01F27/02; H01F27/022
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
An air core duplex reactor comprising two or more cylindrical coil assemblies disposed in concentric, radially spaced relation with an air space therebetween, each said coil assembly comprising one or more conductors helically wound and embedded in a resinous material providing a rigid, longitudinally extending sleeve-like member having a coil winding therein, said coil winding being helically wound from adjacent one end of said sleeve-like member in a direction toward the opposite end and extending only along a portion of the axial length thereof whereby the sleeve at such other end projects beyond the helical winding a substantially greater distance than at said one end, film insulation embedded in said projecting portion of the sleeve and overlapping a portion of the helical winding, means at said one end electrically connecting all of said coils in parallel and terminal means at said opposite end of the sleeve assemblies and connected to respective ones of the coil windings providing individual connections therefor.
Claim 2
Dependent Claim
160 words
An air core duplex reactor comprising two or more cylindrical coil assemblies disposed in concentric, radially spaced relation with an air space therebetween, each said coil assembly comprising one or more conductors helically wound and embedded in a resinous material providing a rigid, longitudinally extending sleeve-like member having a coil winding therein, said coil winding being helically wound from adjacent one end of said sleeve-like member in a direction toward the opposite end and extending only along a portion of the axial length thereof whereby the sleeve at such other end projects beyond the helical winding a substantially greater distance than at said one end, film insulation embedded in said projecting portion of the sleeve and overlapping a portion of the helical winding, means at said one end electrically connecting all of said coils in parallel and terminal means at said opposite end of the sleeve assemblies and connected to respective ones of the coil windings providing individual connections therefor.
Claim 3
Dependent Claim
18 words
An air core duplex reactor as defined in claim 1 wherein said resinous material member is glass reinforced.
Claim 4
Dependent Claim
35 words
An air core duplex reactor as defined in claim 1 including a rigid spider member supporting said coil assemblies at said one end thereof and which provides said means connecting the coil windings in parallel.
Claim 5
Dependent Claim
177 words
An air core duplex reactor comprising two or more sets of two rigid cylindrical coil assemblies, all of said coil assemblies being disposed in concentric, radially spaced relation with a space therebetween and electrically connected in parallel at one end, the opposite ends of each set of coils being connected in parallel and having individual connections for the respective sets of coils, each said rigid coil assembly comprising one or more conductors wound helically and embedded in a resinous material providing a rigid, longitudinally extending sleeve-like member, said coil windings extending axially along only a portion of the length of the respective sleeve-like members and arranged such that the windings extend from closely adjacent the parallel connected ends in a direction toward the opposite end of the sleeve-like assemblies terminating at a position spaced from said opposite end a substantially greater distance than the spacing of said coil windings from the parallel connections and film insulation embedded in the portion of the sleeve projecting beyond the winding and overlapping at least an end portion of the winding.
Claim 6
Dependent Claim
177 words
An air core duplex reactor comprising two or more sets of two rigid cylindrical coil assemblies, all of said coil assemblies being disposed in concentric, radially spaced relation with a space therebetween and electrically connected in parallel at one end, the opposite ends of each set of coils being connected in parallel and having individual connections for the respective sets of coils, each said rigid coil assembly comprising one or more conductors wound helically and embedded in a resinous material providing a rigid, longitudinally extending sleeve-like member, said coil windings extending axially along only a portion of the length of the respective sleeve-like members and arranged such that the windings extend from closely adjacent the parallel connected ends in a direction toward the opposite end of the sleeve-like assemblies terminating at a position spaced from said opposite end a substantially greater distance than the spacing of said coil windings from the parallel connections and film insulation embedded in the portion of the sleeve projecting beyond the winding and overlapping at least an end portion of the winding.
Claim 7
Dependent Claim
28 words
An air core duplex reactor as defined in claim 1 including spacers disposed in circumferential spaced relation between adjacent coil assemblies retaining the same in selected spaced relationship.
Claim 8
Dependent Claim
24 words
An air core duplex reactor as defined in claim 4 wherein each set of coil assemblies comprises alternate ones of the concentrically arranged coils.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |