US4752999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical transformer
Assignee: Individual
•
Filing: 1987-09-04
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Granted: 1988-06-28
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Expires: 2007-09-04
Abstract
Abstract A spherical transformer and process for forming same is set forth. Hollow, hemispherical elements are rotated to enable a cooperating cutting tool to impart a helical impression therein. An adhesive is sprayed into the interiors of both hemispheres and thereafter powdered metal, such as stainless steel, is directed thereon to form a sheet-like core that when both hemispheres are joined to provide an uninterrupted metal core with said hemisphere. A primary winding is inserted into the aforenoted grooves about one hemisphere and a secondary winding is positioned into the helically cut grooves in said second hemisphere. The thusly formed transformer is positioned on a base for a stability thereof.
Inventors
- 👤 Jerome C. Sills, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:00
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/10; H01F41/00; H01F41/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A process for forming a spherical transformer comprising the steps of, a. providing first and second hemispherical portions, and b. imparting grooves into first and second exterior surface of said hemispherical portions, and c. adhesively securing a powdered metallic alloy onto the inner surfaces of said first and second hemispherical portions to form a continuous sheetlike lamination therein, and d. securing said first and second hemispherical portions together, and e. positioning a first winding into said grooves of said first hemispherical portion, and f. imparting a second winding into said grooves of said second hemispherical portion.
Claim 2
Dependent Claim
96 words
A process for forming a spherical transformer comprising the steps of, a. providing first and second hemispherical portions, and b. imparting grooves into first and second exterior surface of said hemispherical portions, and c. adhesively securing a powdered metallic alloy onto the inner surfaces of said first and second hemispherical portions to form a continuous sheetlike lamination therein, and d. securing said first and second hemispherical portions together, and e. positioning a first winding into said grooves of said first hemispherical portion, and f. imparting a second winding into said grooves of said second hemispherical portion.
Claim 3
Dependent Claim
56 words
A process for forming a spherical transformer as set forth in claim 1 wherein said metallic alloy is adhesively secured to said inner surface of said first and second hemispherical portion by initially applying an adhesive, matrix-like material into said inner surfaces and then applying the metallic alloy in powdered form to form said inner laminate.
Claim 4
Dependent Claim
32 words
A process for forming a spherical transformer as set forth in claim 1 wherein said grooves are imparted into said hemispherical portion by rotating said hemispherical portions relative to a grooving tool.
Claim 5
Dependent Claim
51 words
A process for forming a spherical transformer as set forth in claim 1 wherein said spherical transformer is positioned and mounted onto a base element formed with a complementary concave surface to accept a spherical transformer and a planar surface opposite said concave surface for stable positioning on desired support surfaces.
Claim 6
Dependent Claim
52 words
A process for forming a spherical transformer as set forth in claim 1 wherein securement straps of a length greater than the length of a groove formed in said spherical transformer but less then the width of two grooves are secured over said groove to protect and secure said windings positioned therein.
References Cited (Backward Citations)
US1546424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |