US3665356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential transformer with balancing means
Assignee: Rucker Co
•
Filing: 1969-04-23
•
Granted: 1972-05-23
•
Expires: 1989-04-23
Abstract
Abstract A differential transformer having a balancing sleeve interposed between its primary and secondary windings to provide a substantially identical degree of coupling between each of the primary windings and the secondary winding. The balancing sleeve is made of magnetic and/or electrically conductive materials.
Inventors
- 👤 Ellwood S Douglas
- 👤 Wallace W Wahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/20; H01F38/38; H01F27/00; H01F27/34; H01F27/36; H01F27/361; H01F27/366; H01F38/22; H01F38/28; H01F38/30; H01F38/305; H01H; H01H83/00; H01H83/14; H01H83/144; H01H2083/146
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
In a differential transformer, a core of magnetic material, a plurality of conductors passing through said core to form a plurality of single turn primary windings, a secondary winding wound on said core, and current balancing means surrounding said conductors and extending through said core to provide a substantially identical degree of coupling between each of said primary windings and said secondary winding, said current balancing means including spaced apart inner and outer sleeve portions fabricated of an electrically conductive material disposed coaxially of said core, means electrically connecting said inner and outer sleeve portions together at their ends, and a sleeve of magnetic material intermediate said inner and outer sleeve portions, said sleeve extending coaxially of said core.
Claim 2
Dependent Claim
119 words
In a differential transformer, a core of magnetic material, a plurality of conductors passing through said core to form a plurality of single turn primary windings, a secondary winding wound on said core, and current balancing means surrounding said conductors and extending through said core to provide a substantially identical degree of coupling between each of said primary windings and said secondary winding, said current balancing means including spaced apart inner and outer sleeve portions fabricated of an electrically conductive material disposed coaxially of said core, means electrically connecting said inner and outer sleeve portions together at their ends, and a sleeve of magnetic material intermediate said inner and outer sleeve portions, said sleeve extending coaxially of said core.
Claim 3
Dependent Claim
39 words
A differential transformer as in claim 1 wherein said inner and outer sleeve portions are cylindrical sleeveS and the means connecting the ends of said sleeve portions together includes annular rings extending between said sleeves at the ends thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |