US3553526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency generator for the ignition of a discharge lamp
Assignee: US Philips Corp
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Filing: 1969-12-03
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Granted: 1971-01-05
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Expires: 1989-12-03
Abstract
Abstract An ignition circuit for a gas discharge tube operated from an alternating current source which provides a high voltage and frequency starting signal to the tube as the source is reaching the peak output voltage. The control terminal of a voltage controlled switch is connected to the charging circuit for a high frequency oscillator energized by the alternating current source to switch on the oscillator in response to a source voltage near the peak output of the source.
Inventors
- 👤 Jozef Cornelis Moerkens
- 👤 Antonius Johannes Van Bogaart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:58
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/042; H05B41/044
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
201 words
Circuit for the ignition and supply of a gas discharge tube from a low-frequency source, comprising an inductor; a capacitor; a controlled semiconductor switching rectifier having a control terminal and an input-output path; means for connecting the inductor, the capacitor, and the input-output path of the switching rectifier in a first loop circuit; means for coupling the gas discharge tube to the loop circuit, said circuit having at least two input terminals for connecting the circuit to the source; a second inductor; means for connecting the input terminals of the circuit across said capacitor through the second inductor; and means for connecting the control terminal of said rectifier to the input-output path of the rectifier, the means for coupling the gas discharge tube to the loop circuit comprising a third inductor coupled to the first inductor and forming a transformer therewith, and means for connecting the third inductor to the gas discharge tube, the gas discharge tube being provided with a preheated electrode, the circuit further comprising a fourth inductor coupled to at least a part of the second inductor and forming a second transformer therewith and means for connecting the second transformer to the preheated electrode of the discharge tube.
Claim 2
Dependent Claim
201 words
Circuit for the ignition and supply of a gas discharge tube from a low-frequency source, comprising an inductor; a capacitor; a controlled semiconductor switching rectifier having a control terminal and an input-output path; means for connecting the inductor, the capacitor, and the input-output path of the switching rectifier in a first loop circuit; means for coupling the gas discharge tube to the loop circuit, said circuit having at least two input terminals for connecting the circuit to the source; a second inductor; means for connecting the input terminals of the circuit across said capacitor through the second inductor; and means for connecting the control terminal of said rectifier to the input-output path of the rectifier, the means for coupling the gas discharge tube to the loop circuit comprising a third inductor coupled to the first inductor and forming a transformer therewith, and means for connecting the third inductor to the gas discharge tube, the gas discharge tube being provided with a preheated electrode, the circuit further comprising a fourth inductor coupled to at least a part of the second inductor and forming a second transformer therewith and means for connecting the second transformer to the preheated electrode of the discharge tube.
Claim 3
Dependent Claim
143 words
A high-frequency generator for igniting a gas discharge tube provided with filaments from a low frequency source, comprising a first inductor; a capacitor; a controlled semiconductor switching rectifier having a control terminal and an input-output path; means for connecting the first inductor, the capacitory and the input-output pat of the switching rectifier in a first loop circuit; means for connecting the loop circuit to the gas discharge tube, said generator having at least to input terminals for connecting the generator to the source; a second inductor; means for connecting the input terminals of the generator across the capacitor through said second inductor; a third inductor coupled to the second inductor and forming a transformer therewith; means for connecting the third inductor to the filaments of the gas discharge tube; and means for connectinG the control terminal of the rectifier to the loop circuit.
Claim 4
Dependent Claim
143 words
A high-frequency generator for igniting a gas discharge tube provided with filaments from a low frequency source, comprising a first inductor; a capacitor; a controlled semiconductor switching rectifier having a control terminal and an input-output path; means for connecting the first inductor, the capacitory and the input-output pat of the switching rectifier in a first loop circuit; means for connecting the loop circuit to the gas discharge tube, said generator having at least to input terminals for connecting the generator to the source; a second inductor; means for connecting the input terminals of the generator across the capacitor through said second inductor; a third inductor coupled to the second inductor and forming a transformer therewith; means for connecting the third inductor to the filaments of the gas discharge tube; and means for connectinG the control terminal of the rectifier to the loop circuit.
Claim 5
Dependent Claim
47 words
A generator as claimed in claim 2, wherein the means for connecting the loop circuit to the gas discharge tube comprises a fourth inductor coupled to the first inductor and forming a second transformer therewith, and means for connecting the fourth inductor to the gas discharge tube.
Claim 6
Dependent Claim
52 words
A generator as claimed in claim 3, wherein the means for connecting the control terminal of the rectifier to the loop circuit comprises a noncapacitive impedance connected to the control terminal of the rectifier, and means for connecting the noncapacitive impedance to a portion of the second remote from the generator terminals.
Claim 7
Dependent Claim
29 words
A generator as claimed in claim 3, further comprising a separate means for connecting the gas discharge tube to a portion of the second inductor proximate the generator terminals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |