US3758815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supplemental energy storage circuit for arc discharge lamps
Assignee: GTE Sylvania Inc
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Filing: 1972-01-04
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Granted: 1973-09-11
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Expires: 1992-01-04
Abstract
Abstract A ballast circuit for a tungsten-iodide short arc discharge lamp has, in addition to an alternating current full wave rectifier bridge supplying low voltage operating current to the lamp, a capacitor-diode bridge circuit whose discharge characteristic of voltage multiplying and low current is controlled so that discharge occurs while the rectifier bridge is approaching or at zero volts, at the time in each alternating current half cycle when it is needed to promote arc striking or prevent extinction of an arc.
Inventors
- 👤 F Paget
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:21
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; H05B41/042
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
An energy storage circuit for supplementing an alternating current power supply for an arc discharge lamp comprising: a bridge having input terminals for connection to the alternating current supply and output terminals for connection to the lamp, and four arms connected between the terminals, at least two adjacent arms of the bridge in series between the output terminals each comprising a network of capacitances and diodes, each network including at least two capacitances connected in series with each other and an intermediate diode, and at least two remaining diodes each connected in parallel with a different capacitance and an intermediate diode of said series.
Claim 2
Dependent Claim
104 words
An energy storage circuit for supplementing an alternating current power supply for an arc discharge lamp comprising: a bridge having input terminals for connection to the alternating current supply and output terminals for connection to the lamp, and four arms connected between the terminals, at least two adjacent arms of the bridge in series between the output terminals each comprising a network of capacitances and diodes, each network including at least two capacitances connected in series with each other and an intermediate diode, and at least two remaining diodes each connected in parallel with a different capacitance and an intermediate diode of said series.
Claim 3
Dependent Claim
16 words
A circuit according to claim 1 wherein each network comprises N capacitances and 3 (N-1) diodes.
Claim 4
Dependent Claim
10 words
A circuit according to claim 1 wherein N equals 2.
Claim 5
Dependent Claim
25 words
A circuit according to claim 1 wherein two of the bridge arms each comprise the aforesaid capacitance-diode network and two arms each comprise a capacitance.
Claim 6
Dependent Claim
58 words
A circuit according to claim 1 wherein said alternating current supply comprises a rectifier bridge having alternating current input terminals and output terminals, the first said bridge having its input terminals connected to the alternating current input terminals, and the output terminals of the respective bridges being connected in parallel to supply connectors for an arc discharge lamp.
Claim 7
Dependent Claim
17 words
A circuit according to claim 5 wherein a metal-halide arc discharge lamp is connected between said connectors.
Claim 8
Dependent Claim
23 words
A circuit according to claim 5 wherein two of the bridge arms comprise the aforesaid capacitance-diode network and two arms comprise a capacitance.
Claim 9
Dependent Claim
60 words
A circuit according to claim 1 in combination with an alternating current supply comprising a rectifier bridge having alternating current input terminals and output terminals, the first said bridge having its input terminals connected to the alternating current input terminals, and the output terminals of the respective bridges being connected in parallel to supply connectors for an arc discharge lamp.
Claim 10
Dependent Claim
18 words
A circuit according to claim 1 in combination with a kilovolt pulse supply for igniting the lamp arc.
Claim 11
Dependent Claim
15 words
A circuit according to claim 9 wherein the kilovolt supply comprises a mechanical piezoelectric device.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |