Patent US4016477A successfully refreshed from Google Patents.
US4016477A
Expired / Lapsed
US
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Novel multi-path leakage transformer and inverter ballast
Assignee: ISODYNE Inc
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Filing: 1975-04-29
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Granted: 1977-04-05
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Expires: 1995-04-29
Abstract
Abstract A highly efficient, energy saving ballasting and transfer circuit, utilizing a single high frequency inverter ballast unit, capable of powering multiple lamp loads from any direct or alternating electric power source, comprises a current feedback inverter in combination with a unique multi-path, independently controlled leakage transformer, which operates to permit coupling of the single inverter unit to any number of lamps, particularly the gas discharge type. The multi-path leakage transformer provides multiple and independent magnetic circuits to power any number of lamps from a single source which, because of its linear transfer function, achieves controlled light output of the lamps proportional to the power input.
Inventors
- 👤 Horace Ghiringhelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:06
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F38/10; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M7/53832; H02M7/53835; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H05B41/282; H05B41/2821; H05B41/2822; Y; Y10; Y10S; Y10S315/00; Y10S315/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
An inverter ballast for operating multiple electric gas discharge lamps, which comprises a power conversion circuit, and a leakage transformer having a multi-path magnetic circuit, said transformer including a primary coil operated from a single source and separate secondary coils, each said secondary coil having its own independent magnetic core circuit path and its own lamp loads.
Claim 2
Dependent Claim
57 words
An inverter ballast for operating multiple electric gas discharge lamps, which comprises a power conversion circuit, and a leakage transformer having a multi-path magnetic circuit, said transformer including a primary coil operated from a single source and separate secondary coils, each said secondary coil having its own independent magnetic core circuit path and its own lamp loads.
Claim 3
Dependent Claim
60 words
An inverter ballast, according to claim 1, for operation at high frequencies, which comprises a current feedback inverter tuned to a high frequency for optimum power transfer to lamp loads and maximum light output and a leakage transformer, connected between the inverter and the lamps, having a multi-path magnetic circuit, said transformer including said primary coil and said secondary coils.
Claim 4
Dependent Claim
18 words
An inverter ballast, according to claim 1, operating at high frequencies ranging from approximately 20 KHz and higher.
Claim 5
Dependent Claim
18 words
An inverter ballast, according to claim 1, wherein the electric power source is a DC electric power source.
Claim 6
Dependent Claim
20 words
An inverter ballast, according to claim 2, wherein the inverter is a current feed-back inverter tuned to an optimum frequency.
Claim 7
Dependent Claim
16 words
An inverter ballast, according to claim 5, wherein the current feed-back inverter includes variable impedance networks.
Claim 8
Dependent Claim
37 words
An inverter ballast, according to claim 1, wherein the secondary circuits of the multi-path leakage transformer have a high degree of leakage inductance and are tuned independently to maximize energy transfer from the inverter to the lamps.
Claim 9
Dependent Claim
33 words
An inverter ballast, according to claim 1, capable of operating over a wide range of input voltages of at least one decade to permit dimming light output linearly in relation to power consumption.
Claim 10
Dependent Claim
15 words
An inverter ballast, according to claim 1, wherein the gas discharge lamps are fluorescent lamps.
Claim 11
Dependent Claim
69 words
An electric leakage transformer for operating multiple lamp loads from a single power source having a very high degree of magnetic loading isolation between the secondary circuits, which comprises a primary coil and multiple secondary coils corresponding to the number of lamp load sets, said secondary coils being part of separate and independent magnetic paths, which yield high leakage reactances and which pass in common through said primary coil.
Claim 12
Dependent Claim
69 words
An electric leakage transformer for operating multiple lamp loads from a single power source having a very high degree of magnetic loading isolation between the secondary circuits, which comprises a primary coil and multiple secondary coils corresponding to the number of lamp load sets, said secondary coils being part of separate and independent magnetic paths, which yield high leakage reactances and which pass in common through said primary coil.
Claim 13
Dependent Claim
24 words
An electric leakage transformer, according to claim 10, wherein independent secondary ballast reactances permit operation of the secondary lamp loads from a single primary.
Claim 14
Dependent Claim
33 words
An inverter feeding an electric multi-path leakage transformer, according to claim 10, to power any type of multiple load which requires multiple secondaries having individually controlled and magnetically isolated leakage reactances for each.
Claim 15
Dependent Claim
18 words
An inverter ballast, according to claim 1, wherein the electric power source is an AC electric power source.
Claim 16
Dependent Claim
33 words
A converter, feeding an electric multi-path leakage transformer, according to claim 10, to power any type of multiple load which requires multiple secondaries having individually controlled and magnetically isolated leakage reactances for each.
Claim 17
Dependent Claim
33 words
A cyclo-converter feeding an electric multi-path leakage transformer according to claim 10, to power any type of multiple load which requires multiple secondaries having individually controlled and magnetically isolated leakage reactances for each.
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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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |