Patent US3726937A successfully refreshed from Google Patents.
Patent US3219756A successfully refreshed from Google Patents.
US3219756A
Expired / Lapsed
US
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Ignition circuit for an arc-discharge lamp in a projection system
Assignee: General Electric Co
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Filing: 1962-03-05
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Granted: 1965-11-23
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Roussin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:11
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/20; H05B41/23; H05B41/231
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A LIGHT VALVE PROJECTION SYSTEM HAVING A DEFORMABLE MEDIUM, A SOURCE OF ELECTRONS FOR STRIKING SAID DEFORMABLE MEDIUM AND A LIGHT SOURCE COMPRISING AN ARC-DISCHARGE LAMP INCLUDING A PAIR OF ARC-DISCHARGE ELECTRODES HAVING A DESIRED ATMOSPHERE THEREBETWEEN, A MEANS FOR PROVIDING AN IONIZING VOLTAGE FOR THE LAMP COMPRISING: A SOURCE OF RELATIVELY HIGH DIRECT CURRENT VOLTAGE FOR ACCELERATING A STREAM OF ELECTRONS FROM THE ELECTRON SOURCE TOWARD THE DEFORMABLE MEDIUM, MEANS COUPLING SAID SOURCE OF HIGH VOLTAGE BETWEEN THE ELECTRODES OF SAID LAMP FOR CAUSING IONIZATION OF THE ATMOSPHERE THEREBETWEEN, SAID COUPLING MEANS INCLUDING MEANS FOR AUTOMATICALLY DECOUPLING SAID HIGH VOLTAGE SOURCE FROM SAID LAMP WHEN AN OPERATING CURRENT FLOWS IN SAID LAMP.
Claim 2
Dependent Claim
114 words
IN A LIGHT VALVE PROJECTION SYSTEM HAVING A DEFORMABLE MEDIUM, A SOURCE OF ELECTRONS FOR STRIKING SAID DEFORMABLE MEDIUM AND A LIGHT SOURCE COMPRISING AN ARC-DISCHARGE LAMP INCLUDING A PAIR OF ARC-DISCHARGE ELECTRODES HAVING A DESIRED ATMOSPHERE THEREBETWEEN, A MEANS FOR PROVIDING AN IONIZING VOLTAGE FOR THE LAMP COMPRISING: A SOURCE OF RELATIVELY HIGH DIRECT CURRENT VOLTAGE FOR ACCELERATING A STREAM OF ELECTRONS FROM THE ELECTRON SOURCE TOWARD THE DEFORMABLE MEDIUM, MEANS COUPLING SAID SOURCE OF HIGH VOLTAGE BETWEEN THE ELECTRODES OF SAID LAMP FOR CAUSING IONIZATION OF THE ATMOSPHERE THEREBETWEEN, SAID COUPLING MEANS INCLUDING MEANS FOR AUTOMATICALLY DECOUPLING SAID HIGH VOLTAGE SOURCE FROM SAID LAMP WHEN AN OPERATING CURRENT FLOWS IN SAID LAMP.
References Cited (Backward Citations)
US682693A
Cited
US2957942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |