US3883834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballast transformer with heat dissipating device
Assignee: General Electric Co
•
Filing: 1973-12-13
•
Granted: 1975-05-13
•
Expires: 1993-12-13
Abstract
Abstract Ballast transformer is arranged in a housing with its coils resting on a spring bracket in contact with the housing so that heat from the coils is transmitted by the bracket to the housing for dissipation thereby.
Inventors
- 👤 Carl M Osteen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/22; H01F38/00; H01F38/08; H01F38/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
193 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said resilient member being formed of a top and compressible spring leg means, said inductive ballast device resting on said top and holding said spring leg means compressed in contact with said housing wall, said core and coil assembly comprising an elongated core member and coil means surrounding said core member, said coil means resting against said resilient member, said electrically insulating and thermally conducting means being arranged between said coil means and the top of said resilient member, said electrically insulating and thermally conducting means comprising a layer of elastic material on said coil means and a sheet of dielectric material between said elastic material and said resilient member.
Claim 2
Dependent Claim
193 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said resilient member being formed of a top and compressible spring leg means, said inductive ballast device resting on said top and holding said spring leg means compressed in contact with said housing wall, said core and coil assembly comprising an elongated core member and coil means surrounding said core member, said coil means resting against said resilient member, said electrically insulating and thermally conducting means being arranged between said coil means and the top of said resilient member, said electrically insulating and thermally conducting means comprising a layer of elastic material on said coil means and a sheet of dielectric material between said elastic material and said resilient member.
Claim 3
Dependent Claim
183 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said resilient member being formed of a top and compressible spring leg means, said inductive ballast device resting on said top and holding said spring leg means compressed in contact with said housing wall, said core and coil assembly comprising an elongated core member and coil means surrounding said core member, said coil means resting against said resilient member, said electrically insulating and thermally conducting means being arranged between said coil means and the top of said resilient member said housing having opposite ledges, said elongated core member resting at its opposite ends on said ledges in thermal contact therewith.
Claim 4
Dependent Claim
183 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said resilient member being formed of a top and compressible spring leg means, said inductive ballast device resting on said top and holding said spring leg means compressed in contact with said housing wall, said core and coil assembly comprising an elongated core member and coil means surrounding said core member, said coil means resting against said resilient member, said electrically insulating and thermally conducting means being arranged between said coil means and the top of said resilient member said housing having opposite ledges, said elongated core member resting at its opposite ends on said ledges in thermal contact therewith.
Claim 5
Dependent Claim
110 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said heat conductive resilient member comprising a flat bearing portion having spaced legs projecting from one side thereof, said legs being of generally S-shaped compressible spring form.
Claim 6
Dependent Claim
110 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said heat conductive resilient member comprising a flat bearing portion having spaced legs projecting from one side thereof, said legs being of generally S-shaped compressible spring form.
Claim 7
Dependent Claim
99 words
A device as defined in claim 3, said housing wall comprising a main wall portion and opposite flange portions defining a recess for receiving said resilient member, said spring legs of said resilient member having free ends projecting laterally in opposite directions, the distance between said free ends in uncompressed condition of said spring legs being greater than the distance between said opposite wall flange portions, whereby the ends of said spring legs are adapted to engage said opposite wall flange portions for holding said resilient member in assembly with said housing when said member is in uncompressed condition.
Claim 8
Dependent Claim
49 words
A device as defined in claim 1, said coil means comprising insulating bobbin means having a wire coil thereon and spaced rim portions projecting beyond said wire coil, said bottom rim portions resting against said resilient member and defining therewith a space in which said elastic material is confined.
Claim 9
Dependent Claim
133 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said resilient member comprising a flat strip of spring material having an intermediate bEaring surface and formed at its opposite ends with generally S-shaped legs having flat bottom portions generally parallel to said intermediate bearing surface and in thermal contact with said housing wall over substantially their entire bottom surface.
Claim 10
Dependent Claim
133 words
An electrical ballast device comprising, in combination, a housing of heat conductive material having a wall, an inductive ballast device mounted in said housing comprising a core and coil assembly, a heat conductive resilient member arranged between said core and coil assembly and said housing wall and resiliently urged in thermal contact therewith for transmitting heat from said assembly to said housing for dissipation thereby, and electrically insulating and thermally conducting means interposed between said resilient member and said core and coil assembly, said resilient member comprising a flat strip of spring material having an intermediate bEaring surface and formed at its opposite ends with generally S-shaped legs having flat bottom portions generally parallel to said intermediate bearing surface and in thermal contact with said housing wall over substantially their entire bottom surface.
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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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |