US4316121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrally ballasted fluorescent lamp unit
Assignee: General Electric Co
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Filing: 1979-11-01
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Granted: 1982-02-16
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Expires: 1999-11-01
Abstract
Abstract An integrally connected fluorescent lamp and ballast unit having an elongated ballast of wire wound around and along an elongated magnetizable core and extending alongside an elongated lamp bulb. The elongated lamp and ballast can be straight, or can be curved. The ballast provides a combined resistive and inductive ballasting impedance for the lamp.
Inventors
- 👤 Edward E. Hammer
- 👤 Eugene Lemmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:29
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/02; H05B41/04; Y; Y10; Y10S; Y10S315/00; Y10S315/05
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A ballasted discharge lamp unit comprising a ballast connected in series with an elongated discharge lamp, said ballast comprising an elongated magnetizable core wound with a single winding which provides both inductive and resistive components of total ballast impedance, said ballast being positioned alongside and extending along substantially the entire length of said lamp, said inductive and resistive components being of such values that each contributes substantially to the ballasting of the discharge lamp when operating to produce light.
Claim 2
Dependent Claim
79 words
A ballasted discharge lamp unit comprising a ballast connected in series with an elongated discharge lamp, said ballast comprising an elongated magnetizable core wound with a single winding which provides both inductive and resistive components of total ballast impedance, said ballast being positioned alongside and extending along substantially the entire length of said lamp, said inductive and resistive components being of such values that each contributes substantially to the ballasting of the discharge lamp when operating to produce light.
Claim 3
Dependent Claim
28 words
A lamp unit as claimed in claim 1, in which each of said inductive and resistive components contributes at least one-fourth to the total ballasting of the lamp.
References Cited (Backward Citations)
DE716810C
Cited
US2301670A
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GB618256A
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GB738573A
Cited
GB761688A
Cited
US3974418A
Cited
US3996493A
Cited
US4208616A
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US4178535A
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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) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |