US3211952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp operating circuit
Assignee: —
•
Filing: —
•
Granted: 1965-10-12
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Expires: 1982-10-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:04
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/20; H05B41/23; H05B41/232; H05B41/2325; Y; Y10; Y10S; Y10S315/00; Y10S315/02; Y10S315/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A CIRCUIT FOR AN ELECTRIC DISCHARGE LAMP OF THE KIND HAVING A FILAMENTARY ELECTRODE AT EACH END WITH A PAIR OF INLEADS LEADING TO OPPOSITE SIDES OF EACH ELECTRODE COMPRISING: TWO PAIRS OF REACTANCES; AND SWITCHING MEANS HAVING TWO POSITIONS, ONE FOR STANDBY AND THE OTHER FOR NORMAL OPERATION OF SAID LAMP; SAID SWITCHING MEANS IN SAID STANDBY POSITION CONNECTING ONE PAIR OF REACTANCES IN SERIES BETWEEN AN ALTERNATING CURRENT SUPPLY TERMINAL AND ONE SIDE OF ONE ELECTRODE, AND THE OTHER PAIR OF REACTANCES IN SERIES BETWEEN ANOTHER ALTERNATING CURRENT SUPPLY TERMINAL AND ONE SIDE OF THE OTHER ELECTRODE, AND FURTHER CONNECTING THE OTHER SIDES OF THE TWO ELECTRODES TOGETHER; SAID SWITCHING MEANS IN SAID OPERATING POSITION CONNECTING THE REACTANCES OF ONE PAIR FROM ON ALTERNATING CURRENT SUPPLY TERMINAL TO OPPOSITE SIDES OF ONE ELECTRODE, AND THE REACTANCES OF THE OTHER PAIR FROM THE OTHER ALTERNATING CURRENT SUPPLY TERMINAL TO OPPOSITE SIDES OF THE OTHER ELECTRODE.
Claim 2
Dependent Claim
156 words
A CIRCUIT FOR AN ELECTRIC DISCHARGE LAMP OF THE KIND HAVING A FILAMENTARY ELECTRODE AT EACH END WITH A PAIR OF INLEADS LEADING TO OPPOSITE SIDES OF EACH ELECTRODE COMPRISING: TWO PAIRS OF REACTANCES; AND SWITCHING MEANS HAVING TWO POSITIONS, ONE FOR STANDBY AND THE OTHER FOR NORMAL OPERATION OF SAID LAMP; SAID SWITCHING MEANS IN SAID STANDBY POSITION CONNECTING ONE PAIR OF REACTANCES IN SERIES BETWEEN AN ALTERNATING CURRENT SUPPLY TERMINAL AND ONE SIDE OF ONE ELECTRODE, AND THE OTHER PAIR OF REACTANCES IN SERIES BETWEEN ANOTHER ALTERNATING CURRENT SUPPLY TERMINAL AND ONE SIDE OF THE OTHER ELECTRODE, AND FURTHER CONNECTING THE OTHER SIDES OF THE TWO ELECTRODES TOGETHER; SAID SWITCHING MEANS IN SAID OPERATING POSITION CONNECTING THE REACTANCES OF ONE PAIR FROM ON ALTERNATING CURRENT SUPPLY TERMINAL TO OPPOSITE SIDES OF ONE ELECTRODE, AND THE REACTANCES OF THE OTHER PAIR FROM THE OTHER ALTERNATING CURRENT SUPPLY TERMINAL TO OPPOSITE SIDES OF THE OTHER ELECTRODE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |