Electrodeless low pressure discharge lamp with improved heat tra

Details Electrodeless low pressure discharge lamp with improved heat tra Electrodeless low pressure discharge lamp with improved heat tra

1996-12-09

1998-09-01

Pascal, Robert J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315344, 313 46, 313488, 313493, H05B 4116

Patent

active

058014934

ABSTRACT:
A discharge vessel (10) closed in a gastight manner has a cavity (11) enclosing a discharge space provided with an ionizable filling. A coil (20) with a winding (21) of an electric conductor and an assembly (30) of a heat conductor (31) and one or several elongate cores (32) of soft-magnetic material are accommodated in the cavity. The cores (32) are arranged along a longitudinal axis (33) of the heat conductor (31) in one or several recesses (34) of the heat conductor which issue into a circumferential surface (36) of the assembly (30). The heat conductor (31) occupies at least half the circumference in a cross-section perpendicular to the longitudinal axis (33) of the assembly (30). The construction of the lamp according to the invention renders possible lamp operation at higher lamp powers also without the use of a heat pipe.

REFERENCES:
patent: 3987335 (1976-10-01), Anderson
patent: 4065701 (1977-12-01), Haugsjaa et al.
patent: 4536675 (1985-08-01), Postma
patent: 4622495 (1986-11-01), Smeelen
patent: 4661746 (1987-04-01), Postma et al.
patent: 5006752 (1991-04-01), Eggink et al.
patent: 5130912 (1992-07-01), Friederichs et al.
patent: 5572083 (1996-11-01), Antonis et al.
patent: 5598069 (1997-01-01), Van Os et al.
patent: 5621266 (1997-04-01), Popov et al.
patent: 5696426 (1997-12-01), Antonis et al.

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