US4274033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency lamp operating circuit
Assignee: General Electric Co
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Filing: 1979-06-18
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Granted: 1981-06-16
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Expires: 1999-06-18
Abstract
Abstract High frequency circuit for operating gaseous discharge lamps includes oppositely poled controlled semiconductor switches connected to a resonant circuit comprising a capacitor and inductor connected to the lamp load and serving both as a high-frequency ballast for the lamp and to effect alternating turn-off of the semiconductor switches. Diodes are connected to the switches in a manner to provide energy pulses on the lamp load without return to the supply source. A control circuit is provided for alternately triggering the semiconductor switches into operation.
Inventors
- 👤 Joe A. Nuckolls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:49
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H05; H05B; H05B41/00; H05B41/14; H05B41/26; H05B41/28; H05B41/288; H05B41/2885; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
146 words
A high frequency starting, operating and automatic control circuit comprising, in combination, a source of current, a load connected to said source of current, impedance means connected between said load and said source of current in series therewith, first controlled semiconductor switching means connected between said source of current and said impedance means in series therewith, second controlled semiconductor switching means connected in parallel with said series-connected impedance means and said load, unidirectional current means in series with each of said controlled semiconductor switching means for directing energy pulses to said load and blocking normal source current flow, and control means including triggering means connected to said first and second controlled semiconductor switching means for alternate actuation thereof, whereby the alternate energizing of said first and second controlled semiconductor switching means applies high frequency energy pulses to said load for starting, operating and controlling the same.
Claim 2
Dependent Claim
146 words
A high frequency starting, operating and automatic control circuit comprising, in combination, a source of current, a load connected to said source of current, impedance means connected between said load and said source of current in series therewith, first controlled semiconductor switching means connected between said source of current and said impedance means in series therewith, second controlled semiconductor switching means connected in parallel with said series-connected impedance means and said load, unidirectional current means in series with each of said controlled semiconductor switching means for directing energy pulses to said load and blocking normal source current flow, and control means including triggering means connected to said first and second controlled semiconductor switching means for alternate actuation thereof, whereby the alternate energizing of said first and second controlled semiconductor switching means applies high frequency energy pulses to said load for starting, operating and controlling the same.
Claim 3
Dependent Claim
25 words
A circuit as defined in claim 1, said impedance means comprising a capacitor and an inductor connected in series and forming a series resonant circuit.
Claim 4
Dependent Claim
28 words
A circuit as defined in claim 2, and high voltage generating means connected to said inductor across said load for providing a high ignition voltage on said load.
Claim 5
Dependent Claim
28 words
A circuit as defined in claim 3, said inductor comprising primary and secondary windings, said high voltage generating means comprising a second capacitor connected to said primary winding.
Claim 6
Dependent Claim
15 words
A circuit as defined in claim 2, said inductor comprising a high leakage reactance autotransformer.
Claim 7
Dependent Claim
16 words
A circuit as defined in claim 2, said inductor comprising a high leakage reactance isolation transformer.
Claim 8
Dependent Claim
19 words
A circuit as defined in claim 2, said first and second controlled semiconductor switching means comprising silicon controlled rectifiers.
Claim 9
Dependent Claim
17 words
A circuit as defined in claim 2, said first and second controlled semiconductor switching means comprising transistors.
Claim 10
Dependent Claim
32 words
A circuit as defined in claim 5, and high voltage generating means comprising a second capacitor connected to a tap on said autotransformer for providing a high ignition voltage on said load.
Claim 11
Dependent Claim
32 words
A circuit as defined in claim 6, and high voltage generating means comprising a second capacitor connected to a tap on said transformer for providing a high ignition voltage on said load.
Claim 12
Dependent Claim
229 words
A high frequency starting, operating and automatic control circuit comprising, in combination, a source of current, a load connected to said source of current, impedance means connected between said load and said source of current in series therewith, first controlled semiconductor switching means connected between said source of current and said impedance means in series therewith, second controlled semiconductor switching means connected in parallel with said series-connected impedance means and said load, unidirectional current means in series with each of said controlled semiconductor switching means for directing energy pulses to said load and blocking normal source current flow, and control means including triggering means connected to said first and second controlled semiconductor switching means for alternate actuation thereof, whereby the alternate energizing of said first and second controlled semiconductor switching means applies high frequency energy pulses to said load for starting, operating and controlling the same, said source of current providing alternating current, said unidirectional current means comprising a first diode in series with said first semiconductor switching means, a second diode connected to the junction of said first diode and said first semiconductor switching means in parallel with said source of current, a third diode in series with said second semiconductor switching means and a fourth diode connected to the junction of said third diode and said second semiconductor switching means in parallel with said source of current.
Claim 13
Dependent Claim
229 words
A high frequency starting, operating and automatic control circuit comprising, in combination, a source of current, a load connected to said source of current, impedance means connected between said load and said source of current in series therewith, first controlled semiconductor switching means connected between said source of current and said impedance means in series therewith, second controlled semiconductor switching means connected in parallel with said series-connected impedance means and said load, unidirectional current means in series with each of said controlled semiconductor switching means for directing energy pulses to said load and blocking normal source current flow, and control means including triggering means connected to said first and second controlled semiconductor switching means for alternate actuation thereof, whereby the alternate energizing of said first and second controlled semiconductor switching means applies high frequency energy pulses to said load for starting, operating and controlling the same, said source of current providing alternating current, said unidirectional current means comprising a first diode in series with said first semiconductor switching means, a second diode connected to the junction of said first diode and said first semiconductor switching means in parallel with said source of current, a third diode in series with said second semiconductor switching means and a fourth diode connected to the junction of said third diode and said second semiconductor switching means in parallel with said source of current.
Claim 14
Dependent Claim
222 words
A high frequency starting, operating and automatic control circuit comprising, in combination, a source of current, a load connected to said source of current, impedance means connected between said load and said source of current in series therewith, first controlled semiconductor switching means connected between said source of current and said impedance means in series therewith, second controlled semiconductor switching means connected in parallel with said series-connected impedance means and said load, unidirectional current means in series with each of said controlled semiconductor switching means for directing energy pulses to said load and blocking normal source current flow, and control means including triggering means connected to said first and second controlled semiconductor switching means for alternate actuation thereof, whereby the alternate energizing of said first and second controlled semiconductor switching means applies high frequency energy pulses to said load for starting, operating and controlling the same, said unidirectional current means comprising a first diode in series with said first semiconductor switching means, a second diode connected to the junction of said first diode and said first semiconductor switching means in parallel with said source of current, a third diode in series with said second semiconductor switching means and a fourth diode connected to the junction of said third diode and said second semiconductor switching means in parallel with said source of current.
Claim 15
Dependent Claim
222 words
A high frequency starting, operating and automatic control circuit comprising, in combination, a source of current, a load connected to said source of current, impedance means connected between said load and said source of current in series therewith, first controlled semiconductor switching means connected between said source of current and said impedance means in series therewith, second controlled semiconductor switching means connected in parallel with said series-connected impedance means and said load, unidirectional current means in series with each of said controlled semiconductor switching means for directing energy pulses to said load and blocking normal source current flow, and control means including triggering means connected to said first and second controlled semiconductor switching means for alternate actuation thereof, whereby the alternate energizing of said first and second controlled semiconductor switching means applies high frequency energy pulses to said load for starting, operating and controlling the same, said unidirectional current means comprising a first diode in series with said first semiconductor switching means, a second diode connected to the junction of said first diode and said first semiconductor switching means in parallel with said source of current, a third diode in series with said second semiconductor switching means and a fourth diode connected to the junction of said third diode and said second semiconductor switching means in parallel with said source of current.
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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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |