US3771014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply for starting and operating arc lamps
Assignee: GTE Sylvania Inc
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Filing: 1972-08-31
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Granted: 1973-11-06
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Expires: 1992-08-31
Abstract
Abstract A power supply for starting and operating metal halide short arc lamps comprising a full wave rectifier bridge and voltage doubler circuit having a capacitive ballast connected on the AC side and a pair of voltage tripler circuits connected at the positive and negative DC terminals of the bridge. The arc lamp is connected across one of the triplers, and a starting circuit for the arc lamp is energized by the other tripler. The output of the bridgedoubler is employed to operate a timing circuit which activates an indicator when the arc lamp fails to operate after a predetermined interval of starting circuit operation.
Inventors
- 👤 F Paget
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:38
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/02; H05B31/30; H05B31/305; H05B41/00; H05B41/02; H05B41/04; H05B41/042; Y; Y10; Y10S; Y10S315/00; Y10S315/07
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
191 words
A power supply for starting and operating an arc lamp from a source alternating current comprising, in combination: power supply input means for connection to said source of alternating current; a full wave rectifier-voltage doubler circuit having AC input means and first and second DC output terminals; a reactive ballast means coupled between said power supply input means and the AC input means of said rectifier-doubler circuit; means connected to the first DC output terminal of said rectifier-doubler circuit for forming a first voltage tripler having an output terminal; means for connecting said arc lamp between said first tripler output terminal and the second DC output terminal of said rectifier-doubler circuit to form a DC lamp operating circuit loop; a lamp starting circuit coupled to said lamp operating loop for introducing a voltage pulse of sufficient energy to ignite said arc lamp; means connected to the second DC output terminal of said rectifier-doubler circuit for forming a second voltage tripler having an output terminal; and means connecting the first DC output terminal of said rectifierdoubler circuit and said second tripler output terminal to said starting circuit for energizing said starting circuit.
Claim 2
Dependent Claim
191 words
A power supply for starting and operating an arc lamp from a source alternating current comprising, in combination: power supply input means for connection to said source of alternating current; a full wave rectifier-voltage doubler circuit having AC input means and first and second DC output terminals; a reactive ballast means coupled between said power supply input means and the AC input means of said rectifier-doubler circuit; means connected to the first DC output terminal of said rectifier-doubler circuit for forming a first voltage tripler having an output terminal; means for connecting said arc lamp between said first tripler output terminal and the second DC output terminal of said rectifier-doubler circuit to form a DC lamp operating circuit loop; a lamp starting circuit coupled to said lamp operating loop for introducing a voltage pulse of sufficient energy to ignite said arc lamp; means connected to the second DC output terminal of said rectifier-doubler circuit for forming a second voltage tripler having an output terminal; and means connecting the first DC output terminal of said rectifierdoubler circuit and said second tripler output terminal to said starting circuit for energizing said starting circuit.
Claim 3
Dependent Claim
92 words
A power supply in accordance with claim 1 further including a timing circuit connected across the first and second DC output terminals of said rectifier-doubler circuit and adapted to provide an output signal in the presence of a predetermined voltage across said rectifier-doubler output terminals for a predetermined period of time, and indicating means adapted to be activated by the output signal from said timing circuit, said predetermined voltage normally being present when said power supply input is connected to saId source of alternating current and said arc lamp is not operating.
Claim 4
Dependent Claim
80 words
A power supply in accordance with claim 2 wherein said timing circuit is adapted to be reset by any one of the following events: (a) starting of said arc lamp before said indicating means is activated; (b) starting of said arc lamp after said indicating means is activated; (c) disconnection of said power supply input from said source of alternating current before said indicating means is activated; and (d) disconnection of said power supply after said indicating means is activated.
Claim 5
Dependent Claim
33 words
A power supply in accordance with claim 1 wherein said reactive ballast means comprises a capacitor serially connected between said power supply input and the AC input means of said rectifier doubler circuit.
Claim 6
Dependent Claim
27 words
A power supply in accordance with claim 4 wherein said power supply is adapted to be started and operated from a source of 400 Hz alternating current.
Claim 7
Dependent Claim
150 words
A power supply in accordance with claim 1 wherein: said rectifier-doubler circuit comprises a bridge rectifier including four diodes and at least one capacitor connected across the bridge rectifier to produce a voltage doubling action at the DC output terminals thereof; said means forming a first tripler comprises a fifth diode and a second capacitor connected in that order across a first arm of said bridge between the first DC output terminal and AC input means of said rectifier-doubler circuit, said first tripler output terminal being the junction of said fifth diode and second capacitor; and said means forming a second tripler comprising a third capacitor and a sixth diode connected in that order across a second arm of said bridge between the AC input means and second DC output terminal of said rectifier-doubler circuit, said second tripler output terminal being the junction of said sixth diode and third capacitor.
Claim 8
Dependent Claim
83 words
A power supply in accordance with claim 6 wherein: an autotransformer is connected in said lamp operating circuit loop to couple said starting circuit thereto; and said starting circuit comprises a controlled switching means and fourth capacitor connected in circuit with the primary of said autotransformer, and circuit means for periodically generating trigger pulses for said switching means, said controlled switching means being operative in response to each of said trigger pulses for discharging said fourth capacitor through the primary of said autotransformer.
Claim 9
Dependent Claim
27 words
A power supply in accordance with claim 7 wherein said power supply is adapted to be started and operated from a source of 400 Hz alternating current.
Claim 10
Dependent Claim
20 words
A power supply in accordance with claim 7 wherein said means for periodically generating trigger pulses is a relaxation oscillator.
Claim 11
Dependent Claim
92 words
A power supply in accordance with claim 9 further including a timing circuit connected across the first and second DC output terminals of said rectifier-doubler circuit and adapted to provide an output signal in the presence of a predetermined voltage across said rectifier-doubler output terminals for a predetermined period of time, and indicating means adapted to be activated by the output signal from said timing circuit, said predetermined voltage normally being present when said power supply input is connected to said source of alternating current and said arc lamp is not operating.
Claim 12
Dependent Claim
29 words
A power supply in accordance with claim 10 wherein said relaxation oscillator operates at about 5 Hz and the predetermined period of said timing circuit is about 30 seconds.
References Cited (Backward Citations)
US3679934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |