US3708775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable impedance regulating transformer
Assignee: EXIDE ELECTRONICS CORPORATION A CORPORATION OF DE
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Filing: 1971-08-06
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Granted: 1973-01-02
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Expires: 1991-08-06
Abstract
Abstract An adjustable impedance regulating transformer of the type having four windings including a primary winding, a secondary winding and two control windings wound on four legs of a transformer core. The core comprises in sequence a first leg of a first cross section, two legs of twice the first cross section and a fourth leg of the first cross section. The two control windings are located on the two legs of first cross section and the primary and secondary windings are located, respectively, on the two legs of twice the first cross section. The core can utilize standard transformer laminations.
Inventors
- 👤 A Haddock
- 👤 J Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:20
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/14; H01F29/146; H01F29/143
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
235 words
An adjustable impedance regulating transformer having a magnetic core which comprises: a. a first control leg having a first control winding thereon; b. a primary leg having a primary winding thereon, the primary leg having approximately twice the cross sectional area of the first control leg and being structurally and magnetically connected to the first control leg by a first pair of connecting arms; the cross sectional area of each arm of the first pair of connecting arms being approximately equal to the cross sectional area of the first control leg; c. a secondary leg having a secondary winding thereon, the secondary leg having approximately the same cross sectional area as the primary leg and being structurally and magnetically connected to the primary leg by a second pair of connecting arms; the cross sectional area of each arm of the second pair of connecting arms being approximately equal to the cross sectional area of the primary leg; and, d. a second control leg having a second control winding thereon, the cross sectional area of the second control leg being approximately equal to the cross sectional area of the first control leg and being structurally and magnetically connected to the secondary leg by a third pair of connecting arms; the cross sectional area of each arm of the third pair of connecting arms being approximately equal to the cross sectional area of the first control leg.
Claim 2
Dependent Claim
235 words
An adjustable impedance regulating transformer having a magnetic core which comprises: a. a first control leg having a first control winding thereon; b. a primary leg having a primary winding thereon, the primary leg having approximately twice the cross sectional area of the first control leg and being structurally and magnetically connected to the first control leg by a first pair of connecting arms; the cross sectional area of each arm of the first pair of connecting arms being approximately equal to the cross sectional area of the first control leg; c. a secondary leg having a secondary winding thereon, the secondary leg having approximately the same cross sectional area as the primary leg and being structurally and magnetically connected to the primary leg by a second pair of connecting arms; the cross sectional area of each arm of the second pair of connecting arms being approximately equal to the cross sectional area of the primary leg; and, d. a second control leg having a second control winding thereon, the cross sectional area of the second control leg being approximately equal to the cross sectional area of the first control leg and being structurally and magnetically connected to the secondary leg by a third pair of connecting arms; the cross sectional area of each arm of the third pair of connecting arms being approximately equal to the cross sectional area of the first control leg.
Claim 3
Dependent Claim
204 words
An adjustable impedance regulating transformer which comprises: a. a first stack and a second stack of transformer core laminations, each stack of laminations comprising a first end leg, a middle leg and a second end leg with the first end leg being interconnected with the middle leg by a first pair of connecting arms and with the middle leg being interconnected to the second end leg by a second pair of connecting arms, the second stack of laminations located adjacent to the first stack of laminations in partial overlapping relationship so that the first end leg of the first stack overlies the middle leg of the second stack and the middle leg of the first stack overlies the second end leg of the second stack; b. a first control winding being disposed about the second end leg of the first stack; c. a primary winding being disposed about the middle leg of the first staCk and the second end leg of the second stack; d. a secondary winding being disposed about the first end leg of the first stack and the middle leg of the second stack; and e. a second control winding being disposed about the first end leg of the second stack.
Claim 4
Dependent Claim
204 words
An adjustable impedance regulating transformer which comprises: a. a first stack and a second stack of transformer core laminations, each stack of laminations comprising a first end leg, a middle leg and a second end leg with the first end leg being interconnected with the middle leg by a first pair of connecting arms and with the middle leg being interconnected to the second end leg by a second pair of connecting arms, the second stack of laminations located adjacent to the first stack of laminations in partial overlapping relationship so that the first end leg of the first stack overlies the middle leg of the second stack and the middle leg of the first stack overlies the second end leg of the second stack; b. a first control winding being disposed about the second end leg of the first stack; c. a primary winding being disposed about the middle leg of the first staCk and the second end leg of the second stack; d. a secondary winding being disposed about the first end leg of the first stack and the middle leg of the second stack; and e. a second control winding being disposed about the first end leg of the second stack.
Claim 5
Dependent Claim
20 words
An adjustable impedance transformer as described in claim 2 in which the first and second control windings are electrically interconnected.
References Cited (Backward Citations)
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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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |