US4233541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Start winding for solenoidal electric field discharge lamps
Assignee: General Electric Co
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Filing: 1979-05-24
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Granted: 1980-11-11
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Expires: 1999-05-24
Abstract
Abstract Efficient starting of solenoidal electric field discharge lamps is effected with a start winding disposed on the same core with the ballast reactance. This placement of the start winding possesses certain advantages over other methods of lamp starting, and in particular it facilitates hot restart of the lamp.
Inventors
- 👤 Armand P. Ferro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:01
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/048
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A solenoidal electric field lamp apparatus comprising: a light-transmissive evacuable envelope containing an ionizable gaseous medium and having a phosphor disposed on said envelope for absorption of electromagnetic radiation at a first optical frequency from said medium and reradiation of electromagnetic radiation at a second optical frequency; a magnetic lamp core electromagnetically coupled to said medium, said core having a conductive winding thereon; an electronic ballast circuit for supplying radio frequency energy; means for providing ballast reactance for said ballast circuit; a transformer having a core, a primary winding electromagnetically coupled to said ballast circuit and a secondary winding coupled to said lamp core; and a start winding disposed on a magnetic core and connected to act as an autotransformer with said transformer secondary winding and being futher connected to a starting electrode disposed proximal to said gaseous medium.
Claim 2
Dependent Claim
139 words
A solenoidal electric field lamp apparatus comprising: a light-transmissive evacuable envelope containing an ionizable gaseous medium and having a phosphor disposed on said envelope for absorption of electromagnetic radiation at a first optical frequency from said medium and reradiation of electromagnetic radiation at a second optical frequency; a magnetic lamp core electromagnetically coupled to said medium, said core having a conductive winding thereon; an electronic ballast circuit for supplying radio frequency energy; means for providing ballast reactance for said ballast circuit; a transformer having a core, a primary winding electromagnetically coupled to said ballast circuit and a secondary winding coupled to said lamp core; and a start winding disposed on a magnetic core and connected to act as an autotransformer with said transformer secondary winding and being futher connected to a starting electrode disposed proximal to said gaseous medium.
Claim 3
Dependent Claim
20 words
The solenoidal electric field lamp device of claim 1 in which said lamp core is disposed within said gaseous medium.
Claim 4
Dependent Claim
24 words
The lamp apparatus of claim 1 in which said starting electrode comprises an electrically conductive pad disposed adjacent to the exterior of said envelope.
Claim 5
Dependent Claim
26 words
The lamp apparatus of claim 1 in which said starting electrode comprises a coated conductive lead with an exposed tip being disposed within said gaseous medium.
Claim 6
Dependent Claim
20 words
The lamp apparatus of claim 1 in which said ballast reactance means comprises a pair of opposed, electromagnetically coupled coils.
Claim 7
Dependent Claim
31 words
The lamp apparatus of claim 1 in which said ballast reactance means comprises a multilegged magnetic core with at least one leg possessing an air gap therein for providing leakage reactance.
Claim 8
Dependent Claim
22 words
The lamp apparatus of claim 1 in which said transformer core and said ballast reactance means share a common magnetic core structure.
Claim 9
Dependent Claim
18 words
The lamp apparatus of claim 7 in which said start winding also shares the common magnetic core structure.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |