US3803479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulating transformer
Assignee: FOSTER TRANSFORMER CO
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Filing: 1972-09-18
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Granted: 1974-04-09
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Expires: 1992-09-18
Abstract
Abstract A voltage regulating transformer for providing a constant output is disclosed. The transformer has a coil connected in series with a capacitor to form a resonant circuit. The transformer is formed of a plurality of laminate members, the members forming a core about which the coil is wound. The other legs of the laminate members form a yoke about the coil. Alternate laminate members are formed with a magnetic gap to provide a plurality of magnetic gaps in the flux path of the coil.
Inventors
- 👤 R Rathor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:01
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/04; G05F3/06; H; H01; H01F; H01F27/00; H01F27/24; H01F27/245
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
146 words
A voltage regulating transformer having magnetic conductivity, comprising a plurality of stacked, interspersed first and second laminate members each having an E-I configuration and together defining a composite, laminated transformer core and yoke, said first laminate members defining a continuous flux path and said second laminate members having a gap in the flux path thereof, thus defining a plurality of laterally spaced magnetic gaps in the flux path of the transformer core, said laminate members defining a coil supporting portion, coil means wound about said coil supporting portion, means connecting said coil means to an input source of alternating current, means connecting said coil means with output terminals, said plurality of spaced magnetic gaps in the flux path of said transformer core providing spaced regions of high reluctance whereby the transformer becomes saturated quickly thereby providing a constant output over a wide range of input fluctuation.
Claim 2
Dependent Claim
146 words
A voltage regulating transformer having magnetic conductivity, comprising a plurality of stacked, interspersed first and second laminate members each having an E-I configuration and together defining a composite, laminated transformer core and yoke, said first laminate members defining a continuous flux path and said second laminate members having a gap in the flux path thereof, thus defining a plurality of laterally spaced magnetic gaps in the flux path of the transformer core, said laminate members defining a coil supporting portion, coil means wound about said coil supporting portion, means connecting said coil means to an input source of alternating current, means connecting said coil means with output terminals, said plurality of spaced magnetic gaps in the flux path of said transformer core providing spaced regions of high reluctance whereby the transformer becomes saturated quickly thereby providing a constant output over a wide range of input fluctuation.
Claim 3
Dependent Claim
88 words
A voltage regulating transformer as in claim 1, wherein each laminate member comprises a pair of spaced, substantially parallel end elements, said coil supporting portion extending from one end element toward the other end element substantially intermediate the ends thereof, and a pair of leg elements on either side of and parallel to the coil supporting portion and extending between the end elements adjacent the opposite ends of the end elements, said coil wound around the coil supporting portion between the coil supporting portion and the leg elements.
Claim 4
Dependent Claim
47 words
A voltage regulating transformer as in claim 2, wherein the coil supporting portion on each of said second laminate members is shorter than the leg elements and is spaced from said other end element to define said magnetic gap, said leg elements engaging said other end element.
Claim 5
Dependent Claim
50 words
A voltage regulating transformer as in claim 2, wherein the leg elements on each of said second laminate members are shorter than the coil supporting portion thereof and said leg elements are spaced from the other end element to define a pair of magnetic gaps in the flux path thereof.
Claim 6
Dependent Claim
30 words
A voltage regulating transformer as in claim 1, wherein a capacitor is connected in series with said core between the core and the input source thereby forming a series-resonant circuit.
Claim 7
Dependent Claim
34 words
A voltage regulating transformer as in claim 1, wherein said laminate members each comprise an E-element and an I-element, said E- and I-elements engaging one another to form the magnetic circuit of the transformer.
Claim 8
Dependent Claim
42 words
A voltage regulating transformer as in claim 6, wherein each E-element includes an end element and three leg elements extending laterally therefrom, the middle leg element comprising said coil supporting portion and being spaced from the I-element to define said magnetic gap.
Claim 9
Dependent Claim
53 words
A voltage regulating transformer as in claim 6, wherein each E-element includes an end element and three leg elements extending laterally therefrom, the middle leg element comprising said coil supporting portion, the leg elements on either side of the coil supporting portion spaced from the I-element to define a pair of magnetic gaps.
Claim 10
Dependent Claim
44 words
A voltage regulating transformer as in claim 6, wherein the first and second laminate members are stacked in alternating relationship with alternate laminate members reversed so that the I-element of a first laminate member is adjacent an end element of a second laminate member.
Claim 11
Dependent Claim
26 words
The voltage regulating transformer according to claim 1 in which said first and second laminate members are alternately stacked to form said composite laminate transformer core.
Claim 12
Dependent Claim
183 words
A voltage regulating transformer having magnetic conductivity comprising in combination a plurality of first laminate members each defining a continuous flux path, a plurality of second laminate members interspersed among said first laminate members and each having a magnetic gap in the flux path thereof, said first and second laminate members being stacked together to form a composite laminated transformer core having a plurality of laterally spaced magnetic gaps in the flux path of said stacked laminate transformer core wherein the magnetic gaps provide regions of high reluctance whereby the transformer becomes quickly saturated to provide a constant output over a wide range of input fluctuation, each of said laminate members including a pair of spaced, substantially parallel end elements, a pair of leg elements and a coil supporting portion extending between said end elements, coil means wound about said coil supporting portion, means connecting said coil means to an input source of alternating current including a capacitor connected in series with the coil and with the source to form a series resonant circuit, and means connecting said coil means with output terminals.
Claim 13
Dependent Claim
183 words
A voltage regulating transformer having magnetic conductivity comprising in combination a plurality of first laminate members each defining a continuous flux path, a plurality of second laminate members interspersed among said first laminate members and each having a magnetic gap in the flux path thereof, said first and second laminate members being stacked together to form a composite laminated transformer core having a plurality of laterally spaced magnetic gaps in the flux path of said stacked laminate transformer core wherein the magnetic gaps provide regions of high reluctance whereby the transformer becomes quickly saturated to provide a constant output over a wide range of input fluctuation, each of said laminate members including a pair of spaced, substantially parallel end elements, a pair of leg elements and a coil supporting portion extending between said end elements, coil means wound about said coil supporting portion, means connecting said coil means to an input source of alternating current including a capacitor connected in series with the coil and with the source to form a series resonant circuit, and means connecting said coil means with output terminals.
Claim 14
Dependent Claim
96 words
A voltage regulating transformer as in claim 11, wherein said laminate members each comprises an E-element and an I-element, each said E-element including one end element and three leg elements extending laterally therefrom, said coil supporting portion comprising the middle of said leg elements, said other end element comprising the I-element, said E- and I-elements engaging one another to form the magnetic circuit of the transformer, and said coil supporting portion on said second laminate members being shorter than the leg elements on either side thereof and spaced from the I-element to define said magnetic gap.
Claim 15
Dependent Claim
111 words
A voltage regulating transformer as in claim 11, wherein said laminate members each comprises an E-element and an I-element, each of said E-elements including one end element and three leg elements extending laterally therefrom, said coil supporting portion comprising the middle of said leg elements, said other end element comprising the I-element, said E- and I-elements engaging one another to form the magnetic circuit of the transformer, said leg elements on either side of the coil supporting portion of the second laminate members being shorter than the coil supporting portion and spaced from the I-element to define a pair of magnetic gaps in the flux path of the second laminate member.
Claim 16
Dependent Claim
25 words
The voltage regulating transformer according to claim 11 in which said first and second laminate members are alternately stacked to form said composite transformer core.
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |