US3555302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency control circuit
Assignee: General Electric Co
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Filing: 1967-11-30
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Granted: 1971-01-12
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Expires: 1987-11-30
Abstract
Abstract High-frequency control circuit operating gaseous discharge lamps from an alternating current source includes an alternating current wave-chopping circuit comprising parallel connected oppositely poled controlled rectifiers actuated by a voltage sensitive switch connected to an RC charging circuit, and a commutating branch connected across the controlled rectifiers comprising a capacitor and an inductor in series.
Inventors
- 👤 Joe A Nuckolls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:32
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39; H05B41/392; H05B41/3921; H05B41/3924
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
99 words
High-frequency control circuit comprising, in combination, a source of alternating current, load means connected to and energized by said alternating current source, and alternating current wave-chopping means for energizing in a controlled manner said load means with high-frequency alternating current pulses following said source of alternating current for starting and controlling the operation of said load means, said wave-chopping means comprising controlled switching means, actuating means connected to said switching means for controlling the operation thereof for producing high-frequency pulses at a predetermined rate, and commutating means connected to said switching means for controlling the duration of said pulses.
Claim 2
Dependent Claim
99 words
High-frequency control circuit comprising, in combination, a source of alternating current, load means connected to and energized by said alternating current source, and alternating current wave-chopping means for energizing in a controlled manner said load means with high-frequency alternating current pulses following said source of alternating current for starting and controlling the operation of said load means, said wave-chopping means comprising controlled switching means, actuating means connected to said switching means for controlling the operation thereof for producing high-frequency pulses at a predetermined rate, and commutating means connected to said switching means for controlling the duration of said pulses.
Claim 3
Dependent Claim
20 words
A circuit as defined in claim 1, wherein said commutating means comprises a capacitor and an inductor connected in series.
Claim 4
Dependent Claim
18 words
A circuit as defined in claim 2, wherein said commutating means is connected across said controlled switching means.
Claim 5
Dependent Claim
26 words
A circuit as defined in claim 2, wherein said commutating means is connected across said load means at the output side of said controlled switching means.
Claim 6
Dependent Claim
64 words
A circuit as defined in claim 1, wherein said actuating means comprises resistance means and capacitance means connected in series and voltage sensitive switch means connected in series discharge relation with said capacitance means, said controlled switching means comprising controlled rectifier means having control electrode means for triggering the operation thereof, said control electrode means being connected to said actuating means for actuation thereby.
Claim 7
Dependent Claim
63 words
A circuit as dEfined in claim 5, said controlled rectifier means comprising parallel connected oppositely poled controlled rectifiers each having a control electrode, said capacitance means comprising a pair of capacitors respectively connected between said resistance means and the respective controlled rectifiers, said voltage sensitive switch means comprising a pair of unidirectional semiconductor switches respectively connected between said capacitors and said control electrodes.
Claim 8
Dependent Claim
32 words
A circuit as defined in claim 6, and diode means connected between said current source and said actuating means for passing current alternately to said respective control electrodes on alternate half cycles.
Claim 9
Dependent Claim
20 words
A circuit as defined in claim 6, wherein a variable resistor is connected across one of said pair of capacitors.
Claim 10
Dependent Claim
26 words
A circuit as defined in claim 2, wherein a high-frequency capacitor is connected across said alternating current source at the input side of said wave-chopping means.
Claim 11
Dependent Claim
49 words
A circuit as defined in claim 3, said inductor of said commutating means comprising a saturable transformer, said controlled switching means being connected to a tap on said saturable transformer forming an auto transformer having a primary connected to said load means and a secondary connected to said capacitor.
Claim 12
Dependent Claim
23 words
A circuit as defined in claim 10, said controlled switching means comprising parallel connected oppositely poled controlled rectifiers each connected to said tap.
Claim 13
Dependent Claim
40 words
A circuit as defined in claim 1, and feedback means connected between the output side of said controlled switching means and said actuating means for synchronizing the output of said controlled switching means with the operation of said actuating means.
Claim 14
Dependent Claim
25 words
A circuit as defined in claim 1, wherein said controlled switching means comprises transistor means connected between said alternating current source and said load means.
Claim 15
Dependent Claim
28 words
A circuit as defined in claim 1, wherein said controlled switching means comprises parallel connected, oppositely poled transistors connected between said alternating current source and said load means.
Claim 16
Dependent Claim
23 words
A circuit as defined in claim 1, wherein said controlled switching means comprises a pair of parallel connected, oppositely poled, unidirectional semiconductor switches.
Claim 17
Dependent Claim
33 words
A circuit as defined in claim 15, including unidirectional blocking means connected between each semiconductor switch and said actuating means for directing trigger pulses from said latter means to the respective semiconductor switches.
References Cited (Backward Citations)
US3025418A
Cited
US3214604A
Cited
US3353032A
Cited
US3283177A
Cited
US3344311A
Cited
US3453450A
Cited
US3422309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |