Patent US2349684A successfully refreshed from Google Patents.
US3249809A
Expired / Lapsed
US
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Lighting apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1962-11-01
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Granted: 1966-05-03
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Expires: 1982-11-01
Abstract
No abstract record available.
Inventors
- 👤 Emil F Steinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:13
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/20; H05B41/23; H05B41/231
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
LIGHTING APPARATUS INCLUDING A SHORT-ARC LAMP OF THE XENON HIGH-PRESSURE TYPE HAVING A PAIR OF ELECTRODES BETWEEN WHICH AN ARC IS FIRED, POLYPHASE TRANSFORMER MEANS INCLUDING VARIABLE REACTANCE MEANS CONNECTED IN VOLTAGE-ABSORBING RELATIONSHIP WITH SAID TRANSFORMER MEANS, SAID REACTANCE MEANS INCLUDING CORE MEANS OF THE ADJUSTABLE AIR-GAP TYPE, RECTIFIER MEANS OF THE SILICON TYPE CONNECTED TO SAID TRANSFORMER MEANS FOR DERIVING DIRECT-CURRENT OUTPUT FROM SAID TRANSFORMER MEANS, AND MEANS CONNECTING SAID RECTIFIER MEANS IN DIRECT-CURRENT POWER-SUPPLY RELATIONSHIP WITH SAID ELECTRODES SO THAT SAID OUTPUT SUPPLIES A SHORT ARC BETWEEN SAID ELECTRODES, MEANS CONNECTED TO THE REACTANCE MEANS FOR CAUSING ADJUSTMENT OF THE AIR GAP TO CAUSE THE VOLTAGECURRENT CHARACTERISTIC OF SAID OUTPUT TO BE CORRELATEDL TO THE VOLTAGE-CURRENT CHARACTERISTIC OF SAID LAMP AS THE PRESSURE IN SAID LAMP INCREASES DURING THE WARM-UP INTERVAL AFTER SAID ARC IS FIRST FIRED, SO THAT SAID ARC CONTINUES TO BURN FROM THE INSTANT WHEN IT IS FIRED UNTIL AFTER THE FINAL STEADY-STATE PRESSURE IS REACHED.
Claim 2
Dependent Claim
161 words
LIGHTING APPARATUS INCLUDING A SHORT-ARC LAMP OF THE XENON HIGH-PRESSURE TYPE HAVING A PAIR OF ELECTRODES BETWEEN WHICH AN ARC IS FIRED, POLYPHASE TRANSFORMER MEANS INCLUDING VARIABLE REACTANCE MEANS CONNECTED IN VOLTAGE-ABSORBING RELATIONSHIP WITH SAID TRANSFORMER MEANS, SAID REACTANCE MEANS INCLUDING CORE MEANS OF THE ADJUSTABLE AIR-GAP TYPE, RECTIFIER MEANS OF THE SILICON TYPE CONNECTED TO SAID TRANSFORMER MEANS FOR DERIVING DIRECT-CURRENT OUTPUT FROM SAID TRANSFORMER MEANS, AND MEANS CONNECTING SAID RECTIFIER MEANS IN DIRECT-CURRENT POWER-SUPPLY RELATIONSHIP WITH SAID ELECTRODES SO THAT SAID OUTPUT SUPPLIES A SHORT ARC BETWEEN SAID ELECTRODES, MEANS CONNECTED TO THE REACTANCE MEANS FOR CAUSING ADJUSTMENT OF THE AIR GAP TO CAUSE THE VOLTAGECURRENT CHARACTERISTIC OF SAID OUTPUT TO BE CORRELATEDL TO THE VOLTAGE-CURRENT CHARACTERISTIC OF SAID LAMP AS THE PRESSURE IN SAID LAMP INCREASES DURING THE WARM-UP INTERVAL AFTER SAID ARC IS FIRST FIRED, SO THAT SAID ARC CONTINUES TO BURN FROM THE INSTANT WHEN IT IS FIRED UNTIL AFTER THE FINAL STEADY-STATE PRESSURE IS REACHED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |