US5498937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeless high-pressure discharge lamp having coil supports of aluminum nitride supporting individual coil turns
Assignee: US Philips Corp
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Filing: 1994-02-09
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Granted: 1996-03-12
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Expires: 2014-02-09
Abstract
Abstract An electrode-less high pressure discharge lamp has a lamp vessel which is surrounded by an electric coil having turns. End portions of the coil are electrically connected to current conductors. The turns of the coil are supported by aluminium nitride, which is in thermal contact with the current conductors. There is a good heat transfer from the coil to the conductors, keeping the coil relatively cool and efficient. The coil screens the lamp vessel to a small extent only, thereby improving the lamp efficacy.
Inventors
- 👤 Achim Korber
- 👤 Johannes A. J. M. van Vliet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:48
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/048
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
79 words
An electrodeless high-pressure discharge lamp, comprising: a light-transmitting lamp vessel closed in a vacuum tight manner and having an ionizable filling; an electric coil disposed around the lamp vessel, and having turns along a plane through the lamp vessel, said coil having end portions; current conductors electrically connected to said end portions; and a coil support supporting each of said coil turns, said coil support comprising aluminum nitride and being in thermal contact with each of said coil turns.
Claim 2
Dependent Claim
79 words
An electrodeless high-pressure discharge lamp, comprising: a light-transmitting lamp vessel closed in a vacuum tight manner and having an ionizable filling; an electric coil disposed around the lamp vessel, and having turns along a plane through the lamp vessel, said coil having end portions; current conductors electrically connected to said end portions; and a coil support supporting each of said coil turns, said coil support comprising aluminum nitride and being in thermal contact with each of said coil turns.
Claim 3
Dependent Claim
35 words
An electrodeless high-pressure discharge lamp as claimed in claim 1, characterized in that said coil support includes a support plate, and turns of said coil are joined into a spiralling shape on said support plate.
Claim 4
Dependent Claim
45 words
An electrodeless high-pressure discharge lamp as claimed in claim 1, characterized in that said coil support includes a plurality of support plates, and the electric coil has turns which are joined into a spiralling shape and which are enclosed between respective pairs of support plates.
Claim 5
Dependent Claim
31 words
An electrodeless high-pressure discharge lamp as claimed in claim 1, characterized in that the electric coil has a layered structure with a layer of aluminum nitride between each two adjoining turns.
Claim 6
Dependent Claim
33 words
An electrodeless high-pressure discharge lamp as claimed in claim 1, characterized in that the lamp vessel has at least one projection enclosed in the coil support for holding the lamp vessel in position.
Claim 7
Dependent Claim
80 words
An electrodeless discharge lamp, comprising: a) a lamp vessel which is energizeable for emitting light; b) a coil around the lamp vessel for energizing said lamp vessel to emit light, said coil having at least one coil turn; and c) a support plate having an opening through which said lamp vessel extends, said support plate comprising aluminum nitride, supporting said coil turn, and being in thermal contact with said coil turn over substantially the entire length of said coil turn.
Claim 8
Dependent Claim
80 words
An electrodeless discharge lamp, comprising: a) a lamp vessel which is energizeable for emitting light; b) a coil around the lamp vessel for energizing said lamp vessel to emit light, said coil having at least one coil turn; and c) a support plate having an opening through which said lamp vessel extends, said support plate comprising aluminum nitride, supporting said coil turn, and being in thermal contact with said coil turn over substantially the entire length of said coil turn.
Claim 9
Dependent Claim
32 words
An electrodeless discharge lamp according to claim 6, wherein said support plate has opposing faces, and said coil includes a coil turn disposed on each face and electrically connected to each other.
Claim 10
Dependent Claim
43 words
An electrodeless discharge lamp according to claim 7, wherein said lamp includes a plurality of said support plates arranged in a layered structure, each plate supporting a pair of coil turns, with coil turns on adjacent plates being electrically connected to each other.
Claim 11
Dependent Claim
30 words
An electrodeless discharge lamp according to claim 8, wherein said plates have a plate thickness, and said coil turns have a thickness which is substantially less than said plate thickness.
Claim 12
Dependent Claim
20 words
An electrodeless discharge lamp according to claim 9, wherein said coil turns comprise a metal foil fixed on said plates.
Claim 13
Dependent Claim
17 words
An electrodeless discharge lamp according to claim 9, wherein said coil turns are printed on said plates.
Claim 14
Dependent Claim
30 words
An electrodeless discharge lamp according to claim 7, wherein said plates have a plate thickness, and said coil turns have a thickness which is substantially less than said plate thickness.
Claim 15
Dependent Claim
20 words
An electrodeless discharge lamp according to claim 12, wherein said coil turns comprise a metal foil fixed on said plates.
Claim 16
Dependent Claim
17 words
An electrodeless discharge lamp according to claim 12, wherein said coil turns are printed on said plates.
Claim 17
Dependent Claim
30 words
An electrodeless discharge lamp according to claim 6, wherein said plates have a plate thickness, and said coil turns have a thickness which is substantially less than said plate thickness.
Claim 18
Dependent Claim
82 words
An electrodeless discharge lamp, comprising: a) a lamp vessel which is energizeable for emitting light; b) a coil around the lamp vessel for energizing said lamp vessel to emit light, said coil having at least one coil turn; and c) a support plate having an opening through which said lamp vessel extends, said support plate consisting essentially of aluminum nitride, supporting said coil turn, and being in thermal contact with said coil turn over substantially the entire length of said coil turn.
Claim 19
Dependent Claim
82 words
An electrodeless discharge lamp, comprising: a) a lamp vessel which is energizeable for emitting light; b) a coil around the lamp vessel for energizing said lamp vessel to emit light, said coil having at least one coil turn; and c) a support plate having an opening through which said lamp vessel extends, said support plate consisting essentially of aluminum nitride, supporting said coil turn, and being in thermal contact with said coil turn over substantially the entire length of said coil turn.
Claim 20
Dependent Claim
21 words
An electrodeless discharge lamp according to claim 16, wherein said coil turn comprises a metal foil fixed on said support plate.
Claim 21
Dependent Claim
18 words
An electrodeless discharge lamp according to claim 16, wherein said coil turn is printed on said support plate.
Claim 22
Dependent Claim
89 words
An electrodeless discharge lamp, comprising: a) a lamp vessel which is energizeable for emitting light; b) a coil around the lamp vessel for energizing said lamp vessel to emit light, said coil having at least one coil turn; and c) a support plate for supporting said coil turn and for transporting heat away from said coil turn, said support plate having an opening through which said lamp vessel extends, and said plate being in thermal contact with said coil turn over substantially the entire length of said coil turn.
Claim 23
Dependent Claim
89 words
An electrodeless discharge lamp, comprising: a) a lamp vessel which is energizeable for emitting light; b) a coil around the lamp vessel for energizing said lamp vessel to emit light, said coil having at least one coil turn; and c) a support plate for supporting said coil turn and for transporting heat away from said coil turn, said support plate having an opening through which said lamp vessel extends, and said plate being in thermal contact with said coil turn over substantially the entire length of said coil turn.
Claim 24
Dependent Claim
32 words
An electrodeless discharge lamp according to claim 19, wherein said support plate has opposing faces, and said coil includes a coil turn disposed on each face and electrically connected to each other.
Claim 25
Dependent Claim
43 words
An electrodeless discharge lamp according to claim 20, wherein said lamp includes a plurality of said support plates arranged in a layered structure, each plate supporting a pair of coil turns, with coil turns on adjacent plates being electrically connected to each other.
Claim 26
Dependent Claim
30 words
An electrodeless discharge lamp according to claim 21, wherein said plates have a plate thickness, and said coil turns have a thickness which is substantially less than said plate thickness.
Claim 27
Dependent Claim
20 words
An electrodeless discharge lamp according to claim 22, wherein said coil turns comprise a metal foil fixed on said plates.
Claim 28
Dependent Claim
17 words
An electrodeless discharge lamp according to claim 22, wherein said coil turns are printed on said plates.
Claim 29
Dependent Claim
30 words
An electrodeless discharge lamp according to claim 19, wherein said plates have a plate thickness, and said coil turns have a thickness which is substantially less than said plate thickness.
Claim 30
Dependent Claim
20 words
An electrodeless discharge lamp according to claim 25, wherein said coil turns comprise a metal foil fixed on said plates.
Claim 31
Dependent Claim
17 words
An electrodeless discharge lamp according to claim 25, wherein said coil turns are printed on said plates.
Claim 32
Dependent Claim
48 words
An electrodeless discharge lamp according to claim 19, wherein said plate has opposing plate faces, said coil turn spirals radially outward between said plate faces with successive radially adjacent portions, and said plate includes sections disposed between and supporting said successive radially adjacent portions of said coil turn.
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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) | 1999-03-12 | 1999-09-11 | 2000-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-12 | 2003-09-11 | 2004-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-12 | 2007-09-11 | 2008-03-12 | $7700.00 | Window Closed / Lapsed |