Electrodeless high intensity discharge lamp excitation coil and

Details Electrodeless high intensity discharge lamp excitation coil and Electrodeless high intensity discharge lamp excitation coil and

Filed on

1991-10-31

Date issued

1992-10-06

Examiner

LaRoche, Eugene R.

Patent Class

Electric lamp and discharge devices: systems

SubClass

Pulsating or a.c. supply

SubSubClass

Induction-type discharge device load

Other Related Categories

315344, H05B 4116

Type

Patent

Status

active

Patent number

051534843

Description

ABSTRACT:
An electrodeless high intensity discharge (HID) lamp system includes a ballast housing constructed from a thermally conductive material for containing a ballast of a type having at least one RF power switching device. The RF switching device is thermally coupled to the ballast housing to provide heat sinking therefor. The excitation coil of the HID lamp is also thermally coupled to said ballast housing via thermally-conductive coil mounting studs, but is electrically insulated therefrom. An opening in the ballast housing enables the electrical connection of the coil to the output circuit of the ballast. The RF power switching device and the excitation coil are arranged so as to be spaced apart sufficiently in order to maintain the ballast housing temperature substantially uniform during operation of said lamp, thereby maximizing lamp efficiency and increasing the useful life of the lamp and ballast.

REFERENCES:
patent: 4383203 (1983-05-01), Stanley
patent: 4812702 (1989-03-01), Anderson
patent: 4894591 (1990-01-01), Witting
patent: 4910439 (1990-03-01), El-Hamamsy
patent: 5023566 (1991-06-01), El-Hamamsy
patent: 5039903 (1991-08-01), Farrall
patent: 5043859 (1991-08-01), Korman et al.
patent: 5047692 (1991-09-01), Borowiec et al.
patent: 5057750 (1991-10-01), Farrall
patent: 5075600 (1991-12-01), El-Hamamsy

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