Luminaire for an electrodeless high intensity discharge lamp wit

Details Luminaire for an electrodeless high intensity discharge lamp wit Luminaire for an electrodeless high intensity discharge lamp wit

1990-03-12

1991-04-09

Mis, David

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315 85, H05B 4124

Patent

active

050067630

ABSTRACT:
A luminaire for an electrodeless high intensity discharge (HID) lamp includes passive and/or active electromagnetic interference (EMI) shielding apparatus. One embodiment of passive EMI shielding apparatus comprises at least one section of a conductive conical surface oriented so that its longitudinal axis is coincident with the envelope of the HID lamp. Currents are induced in the outer surface of the conductive cone-section, establishing a radio frequency magnetic field tending to eliminate the radio frequency magnetic field induced by current through the excitation coil of the lamp. Alternative or additional types of passive EMI shielding apparatus include a conductive disk having an opening for surrounding the envelope in the vicinity of the arc tube, and nested conductive cylinders. Active EMI shielding apparatus comprises a loop of wire for carrying a current in order to establish another magnetic field tending to reduce or eliminate EMI. A luminaire for directing light radiated by the HID lamp includes a parabolic reflector which functions as passive EMI shielding apparatus and, in one embodiment, comprises a waveguide beyond cutoff for preventing electromagnetic radiation from propagating through the lamp.

REFERENCES:
patent: 3763392 (1973-10-01), Hollister
patent: 3860854 (1975-01-01), Hollister
patent: 4152745 (1979-05-01), Eul
patent: 4187445 (1980-02-01), Houston
patent: 4187447 (1989-02-01), Stout et al.
patent: 4409521 (1983-10-01), Roberts
patent: 4810938 (1989-03-01), Johnson et al.
patent: 4812702 (1989-03-01), Anderson
patent: 4910439 (1990-03-01), El-Hamamsy et al.
patent: 4959584 (1990-09-01), Anderson

Affiliated with

Also associated with

Rating

Luminaire for an electrodeless high intensity discharge lamp wit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Luminaire for an electrodeless high intensity discharge lamp wit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Luminaire for an electrodeless high intensity discharge lamp wit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2036943