Metal vapor discharge lamp

Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Discharge device load

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Details

315 60, 315 70, 315 73, 315262, H05B 4119, H01J 1734

Patent

active

042232473

ABSTRACT:
The invention relates to a high-pressure sodium vapor discharge lamp which comprises a discharge tube provided with an external starting electrode. In accordance with the invention the lamp comprises a transformer wherein the secondary winding of the transformer is connected between the starting electrode and a main electrode of the discharge tube, the primary winding of that transformer being included in an oscillatory circuit including a glow starter. These further components of the starting circuit form part of the lamp. In this construction proper starting of the lamp is achieved with minimal insulation near the input terminals of the lamp.

REFERENCES:
patent: 3859562 (1975-01-01), Nakamura
patent: 3900753 (1975-08-01), Richardson
patent: 4037129 (1977-07-01), Zack et al.

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