US3305697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballast apparatus with air-core inductor
Assignee: General Electric Co
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Filing: 1963-11-12
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Granted: 1967-02-21
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Frank A Neusbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:42
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
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A BALLAST APPARATUS FOR STARTING AND OPERATING AT LEAST ONE ELECTRIC DISCHARGE LAMP FROM AN ALTERNATING SOURCE, SAID BALLAST APPARATUS INCLUDING A HIGH LEAKAGE REACTANCE TRANSFORMER HAVING A MAGNETIC CORE, A PRIMARY WINDING AND A SECONDARY WINDING INDUCTIVELY COUPLED WITH SAID PRIMARY WINDING ON THE MAGNETIC CORE, SAID PRIMARY WINDING HAVING A PAIR OF LEADS FOR CONNECTION TO SAID ALTERNATING SOURCE, A SERIES CAPACITOR CONNECTED IN SERIES CIRCUIT RELATION WITH SAID SECONDARY WINDING TO PROVIDE A NET CAPACITIVE REACTANCE IN THE SECONDARY CIRCUIT OF SAID HIGH LEAKAGE REACTANCE TRANSFORMER, A SHUNTING CAPACITOR CONNECTED IN PARALLEL CIRCUIT RELATION WITH SAID SECONDARY WINDING, CIRCUIT MEANS INCLUDING A PLURALITY OF OUTPUT LEADS FOR SUPPLYING THE OUTPUT CURRENT OF THE APPARATUS TO THE LAMP, THE IMPROVEMENT COMPRISING AN AIR-CORE IN-
Claim 2
Dependent Claim
127 words
IN A BALLAST APPARATUS FOR STARTING AND OPERATING AT LEAST ONE ELECTRIC DISCHARGE LAMP FROM AN ALTERNATING SOURCE, SAID BALLAST APPARATUS INCLUDING A HIGH LEAKAGE REACTANCE TRANSFORMER HAVING A MAGNETIC CORE, A PRIMARY WINDING AND A SECONDARY WINDING INDUCTIVELY COUPLED WITH SAID PRIMARY WINDING ON THE MAGNETIC CORE, SAID PRIMARY WINDING HAVING A PAIR OF LEADS FOR CONNECTION TO SAID ALTERNATING SOURCE, A SERIES CAPACITOR CONNECTED IN SERIES CIRCUIT RELATION WITH SAID SECONDARY WINDING TO PROVIDE A NET CAPACITIVE REACTANCE IN THE SECONDARY CIRCUIT OF SAID HIGH LEAKAGE REACTANCE TRANSFORMER, A SHUNTING CAPACITOR CONNECTED IN PARALLEL CIRCUIT RELATION WITH SAID SECONDARY WINDING, CIRCUIT MEANS INCLUDING A PLURALITY OF OUTPUT LEADS FOR SUPPLYING THE OUTPUT CURRENT OF THE APPARATUS TO THE LAMP, THE IMPROVEMENT COMPRISING AN AIR-CORE IN-
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |