Low-pressure mercury vapor discharge lamp

Details Low-pressure mercury vapor discharge lamp Low-pressure mercury vapor discharge lamp

2007-02-20

2007-02-20

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S550000, C313S547000, C445S038000

Reexamination Certificate

active

10560680

ABSTRACT:
Low-pressure mercury vapor discharge lamp comprises a light-transmitting discharge vessel (10) enclosing, in a gastight manner, a discharge space (13) provided with a filling of mercury and a rare gas. The discharge vessel comprises discharge means (20a;20b) for maintaining a discharge in the discharge space. The discharge vessel is provided with a container comprising an amalgam (2). The container is provided with releasing means (4) for the controlled release of mercury vapor from the amalgam. The releasing means is open during lamp operation and is substantially closed when, during lamp operation, the temperature of the amalgam becomes higher than a pre-determined temperature. Preferably, the pre-determined temperature corresponds to a temperature of a range of temperatures at which the mercury-vapor pressure above the amalgam is relatively stable.

REFERENCES:
patent: 3619697 (1971-11-01), Evans
patent: 4823047 (1989-04-01), Holmes et al.
patent: 5757129 (1998-05-01), Schafnitzel et al.
patent: 5917276 (1999-06-01), Traksel et al.
patent: 6310437 (2001-10-01), Blau et al.
patent: 6456004 (2002-09-01), Johnson et al.
patent: 61047056 (1986-03-01), None

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