Patent US4176334A successfully refreshed from Google Patents.
US4176334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage transformer and process for making same
Assignee: Raytheon Co
•
Filing: 1977-06-13
•
Granted: 1979-11-27
•
Expires: 1997-06-13
Abstract
Abstract High voltage solid dielectric insulation system transformers and inductors have been designed and produced by a process which results in a substantial improvement in the high voltage, size and weight characteristics of magnetic components prepared therefrom.
Inventors
- 👤 Robert S. Buritz
- 👤 Robert D. Parker
- 👤 Jack J. Kisch
- 👤 John Burnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:54
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/327; H01F27/34; H01F27/36; H01F27/363; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49073
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A small, lightweight, high voltage transformer utilizing all solid dielectric insulation materials having a specific weight of less than three pounds per kilowatt of transformer power comprising a primary transformer winding disposed about a porous barrier insulation material impregnated with a dielectric resin, a conductively coated epoxy-glass laminate primary shield electrically connected to said primary winding and extending beyond said primary winding in the axial direction and having rounded ends which project in a radial direction away from said winding and maintained in a predetermined spaced relationship to said winding by said impregnated porous barrier insulation material, a conductively coated epoxy-glass laminate secondary shield maintained in a predetermined spaced relationship to said primary shield by said impregnated insulation material and electrically connected to a secondary transformer winding disposed about said secondary shield and an encapsulation system comprised of said dielectric resin which completely surrounds and encapsulates said transformer.
Claim 2
Dependent Claim
148 words
A small, lightweight, high voltage transformer utilizing all solid dielectric insulation materials having a specific weight of less than three pounds per kilowatt of transformer power comprising a primary transformer winding disposed about a porous barrier insulation material impregnated with a dielectric resin, a conductively coated epoxy-glass laminate primary shield electrically connected to said primary winding and extending beyond said primary winding in the axial direction and having rounded ends which project in a radial direction away from said winding and maintained in a predetermined spaced relationship to said winding by said impregnated porous barrier insulation material, a conductively coated epoxy-glass laminate secondary shield maintained in a predetermined spaced relationship to said primary shield by said impregnated insulation material and electrically connected to a secondary transformer winding disposed about said secondary shield and an encapsulation system comprised of said dielectric resin which completely surrounds and encapsulates said transformer.
Claim 3
Dependent Claim
98 words
The transformer of claim 1, wherein said primary shield projects in the axial direction further than the windings of said primary winding and secondary shield and has rounded ends with radii substantially larger than the radii of said winding wires which project in a radial direction away from said primary coil, wherein said secondary shield projects in the axial direction further than the ends of said secondary coil and has radial components with rounded ends with radii substantially larger than the radii of said secondary winding wires which project in the radial direction further than said secondary winding.
Claim 4
Dependent Claim
20 words
The transformer of claim 1, wherein said insulation material is comprised of a chopped-polyester fiber mat impregnated with a resin.
Claim 5
Dependent Claim
40 words
The transformer of claim 1, wherein said insulation material is comprised of a chopped-polyester fiber mat impregnated with a resin comprised of a mixture of butyl-glycidyl ether and the reaction product of bisphenol-A and epichlorohydrin crosslinked with an amine hardener.
Claim 6
Dependent Claim
20 words
The transformer of claim 4, wherein said resin is a mixture of 11% butyl-glycidyl ether and 89% said reaction product.
Claim 7
Dependent Claim
18 words
The transformer of claim 4, wherein said amine hardener is comprised of menthane diamine, metaphenylene diamine and benzyldimethylamine.
Claim 8
Dependent Claim
99 words
The transformer of claim 4 wherein said primary shield projects in the axial direction further than the windings of said primary winding and secondary shield and has rounded ends with radii substantially larger than the radii of said winding's wires which project in a radial direction away from said primary coil and wherein said secondary shield projects in the axial direction further than the ends of said secondary winding and has radial components whose rounded ends have radii substantially larger than the radii of said secondary winding wires which project in the radial direction further than said secondary winding.
Claim 9
Dependent Claim
39 words
A transformer of claim 1 having several secondary shields arranged about said primary shield, wherein each shield is electrically connected to one secondary winding and is insulated from other secondary shields and said primary shield by said insulation material.
Claim 10
Dependent Claim
40 words
A transformer of claim 8 wherein said insulation material is comprised of a chopped-polyester fiber mat impregnated with a resin comprised of a mixture of butyl-glycidyl ether and the reaction product of bisphenol-A and epichlorohydrin crosslinked with an amine hardener.
Claim 11
Dependent Claim
68 words
A transformer of claim 9 having multiple secondary windings wherein each secondary winding is electrically connected to an outer corona shield having rounded edges which extend beyond said secondary in the axial direction and wherein each secondary unit, comprising an outer corona shield, a secondary shield, and a secondary winding electrically connected together, is insulated from other secondary units and said primary shield by said electrical insulation materials.
Claim 12
Dependent Claim
28 words
A transformer of claim 10 which includes a core whereby electromagnetic coupling between said primary windings and said secondary windings is achieved and a flux path is contained.
References Cited (Backward Citations)
US1837245A
Cited
US2170048A
Cited
CH211138A
Cited
DE976786C
Cited
US2731589A
Cited
US2995685A
Cited
US3265998A
Cited
DE1513911A1
Cited
US3436704A
Cited
US3566202A
Cited
US3643196A
Cited
US3675175A
Cited
US3979530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |