Using a magnetic field to locate an amalgam in an electrodeless

Details Using a magnetic field to locate an amalgam in an electrodeless Using a magnetic field to locate an amalgam in an electrodeless

1993-12-15

1995-05-02

Gross, Anita Pellman

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

313160, 313490, 313493, 315344, 362264, 445 26, 445 40, 445 42, H05B 4116

Patent

active

054122899

ABSTRACT:
An electrodeless SEF fluorescent discharge lamp of the type having an envelope with a re-entrant cavity formed therein for containing an excitation coil includes an amalgam positioned for maintaining an optimum mercury vapor pressure during lamp operation. The amalgam is doped with a magnetic material, such as iron, cobalt, nickel, aluminum or tungsten, and is initially located in an optimal operating position using a magnetic field generated by a magnet situated about the lamp envelope. Advantageously, the magnetic field can be used to relocate the amalgam within the exhaust tube, as desired, during lamp processing steps. After processing, the magnet is removed, and no amalgam holder is required.

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"Electrodeless Fluorescent Lamp with Optimized Amalgam Positioning," by Borowitec et al., GE Docket No. RD-22,894, Ser. No. 08/130,935, filed Oct. 4, 1993.
"Accurate Placement and Retention of an Amalgam in an Electrodeless Fluorescent Lamp," by Borowitec et al., GE Docket No. RD-23,176, Ser. No. 08/131,221, filed Oct. 4, 1993.

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