Excitation coil for an electrodeless fluorescent lamp

Details Excitation coil for an electrodeless fluorescent lamp Excitation coil for an electrodeless fluorescent lamp

1992-10-26

1994-08-30

Lee, Benny

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315348, 315 39, 313155, 313355, H01J 6154

Patent

active

053431260

ABSTRACT:
An excitation coil for an electrodeless fluorescent lamp of the type having a core of insulating material, is made of a metal having a low thermal expansion coefficient which is plated with a high-conductivity metal. An insulating coating is applied over the metal plating. An exemplary coil includes a molybdenum wire, plated with silver, and finally coated with alumina. The result is a thermally stable excitation coil that maintains its shape, even at high operating temperatures, and hence maintains its impedance characteristic over the operating range of the lamp.

REFERENCES:
patent: 2282097 (1942-05-01), Taylor
patent: 3161540 (1964-12-01), Kingsley et al.
patent: 3268305 (1966-08-01), Hagadorn et al.
patent: 4010400 (1977-03-01), Hollister
patent: 4119889 (1978-10-01), Hollister
patent: 4422017 (1983-12-01), Denneman et al.
Roberts, "Electrodeless Fluorescent Lamp", pending U.S. patent application, Ser. No. 07/937,083, filed Aug. 31, 1992.
El-Hamamsy, "Electrodeless Fluorescent Lamp Shield for Reduction of Electromagnetic Interference and Dielectric Losses", pending U.S. patent application, Ser. No. 07/936,495, filed Aug. 28, 1992.

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