Patent US3351815A successfully refreshed from Google Patents.
US3351815A
Expired / Lapsed
US
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Ballast employing plurality of temperature sensitive fuses
Assignee: General Electric Co
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Filing: 1965-07-09
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Granted: 1967-11-07
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Expires: 1985-07-09
Abstract
No abstract record available.
Inventors
- 👤 George L Wolfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:50
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/40; H01F27/402; H01F27/406; H01H; H01H37/00; H01H37/74; H01H37/76; H01H37/761; Y; Y10; Y10S; Y10S315/00; Y10S315/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A FLUORESCENT LAMP BALLAST CIRCUIT HAVING AT LEAST A PRIMARY WINDING AND A SECOND WINDING COUPLED TO A MAGNETIC CORE, SAID BALLAST BEING SUPPLED WITH ELECTRICAL POWER THROUGH INPUT LEADS, THE IMPROVEMENT COMPRISING: A PLURALITY OF TEMPERATURE SENSITIVE FUSES EACH HAVING A STRUCTURE THAT OPENS THE ELECTRIC CIRCUIT THROUGH SAID FUSE IN RESPONSE TO THE AMBIENT TEMPERATURE OF SAID FUSE EXCEEDING A PREDETERMINED MAGNITUDE; MEANS CONNECTING SAID FUSES IN PARALLEL; MEANS CONNECTING SAID PARALLEL CONNECTED FUSES IN SERIES WITH ONE LEAD OF SAID BALLAST CIRCUIT; AND MEANS POSITIONING SAID FUSES IN SAID BALLAST CASE.
Claim 2
Dependent Claim
95 words
IN A FLUORESCENT LAMP BALLAST CIRCUIT HAVING AT LEAST A PRIMARY WINDING AND A SECOND WINDING COUPLED TO A MAGNETIC CORE, SAID BALLAST BEING SUPPLED WITH ELECTRICAL POWER THROUGH INPUT LEADS, THE IMPROVEMENT COMPRISING: A PLURALITY OF TEMPERATURE SENSITIVE FUSES EACH HAVING A STRUCTURE THAT OPENS THE ELECTRIC CIRCUIT THROUGH SAID FUSE IN RESPONSE TO THE AMBIENT TEMPERATURE OF SAID FUSE EXCEEDING A PREDETERMINED MAGNITUDE; MEANS CONNECTING SAID FUSES IN PARALLEL; MEANS CONNECTING SAID PARALLEL CONNECTED FUSES IN SERIES WITH ONE LEAD OF SAID BALLAST CIRCUIT; AND MEANS POSITIONING SAID FUSES IN SAID BALLAST CASE.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |