Coil assembly for an electrodeless fluorescent lamp
First Claim
Patent Images
1. An electrodeless fluorescent lamp comprising:
- a discharge vessel containing a fill which when energized sustains a discharge and at least a phosphor coating on the inner surface of the vessel, the vessel having a re-entrant portion; and
,a coil assembly comprising;
a base, a core of magnetically permeable material supported on the base, a coil around the core, anda retaining clip arrangement for securing the coil relative to the base and retaining the core on the base;
the coil and core of the coil assembly being housed in the re-entrant portion of the vessel.
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Abstract
A coil assembly for an electrodeless fluorescent lamp comprises a hollow ferrite core 30, and a coil 31. The core is retained on a base 32 by a coil former 34 surrounding the core. The core 30 is retained in the former 34 by a circlip 33 or projections. The coil 31 is wound on the former. Pins 36 to which the coil is soldered connect the coil to an energizing circuit.
119 Citations
17 Claims
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1. An electrodeless fluorescent lamp comprising:
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a discharge vessel containing a fill which when energized sustains a discharge and at least a phosphor coating on the inner surface of the vessel, the vessel having a re-entrant portion; and
,a coil assembly comprising; a base, a core of magnetically permeable material supported on the base, a coil around the core, and a retaining clip arrangement for securing the coil relative to the base and retaining the core on the base; the coil and core of the coil assembly being housed in the re-entrant portion of the vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An electrodeless fluorescent lamp comprising:
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a discharge vessel containing a fill which when energized sustains a discharge and at least a phosphor coating on the inner surface of the vessel, the vessel having a re-entrant portion; and
,a coil assembly comprising; a base, a core of magnetically permeable material supported on the base, a coil around the cores, and at least a pair of fingers between which the core is located that retain the core on the base, the fingers having respective lateral projections engaging the end of the core remote from the base; the coil and core of the coil assembly being housed in the re-entrant portion of the vessel.
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17. An electrodeless fluorescent lamp comprising:
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a discharge vessel containing a fill which when energized sustains a discharge and at least a phosphor coating on the inner surface of the vessel, the vessel having a re-entrant portion; and
,a coil assembly comprising; a base, a core of magnetically permeable material supported on the base, a coil around the core, and a coil former for retaining the core on the base, the core being located in the coil former, the coil being wound on the coil former, and the core is retained in the former by a circlip within the former; the coil and core of the coil assembly being housed in the re-entrant portion of the vessel.
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Specification