Fluorescent lamp and amalgam assembly therefor

Details Fluorescent lamp and amalgam assembly therefor Fluorescent lamp and amalgam assembly therefor

2005-05-10

2005-05-10

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S491000, C313S492000, C313S493000, C313S546000, C313S561000, C313S582000

Reexamination Certificate

active

06891323

ABSTRACT:
An amalgam assembly for a fluorescent lamp includes an exhaust tubulation closed at a free end thereof, a glass ball disposed in the tubulation, and a mercury amalgam body disposed in the tubulation between the glass ball and the tubulation closed end. The tubulation is provided with a pinched portion comprising a plurality of inwardly extending dimples separated from each other and adapted to engage the glass ball to retain the glass ball on a central axis of the tubulation. The glass ball rests on the dimples concentrically and gaps between the dimples allow gas to pass therethrough between the glass ball and an inside surface of the tubulation.

REFERENCES:
patent: 4035682 (1977-07-01), Bubar
patent: 4393325 (1983-07-01), van der Kooi
patent: 4528209 (1985-07-01), Anderson et al.
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patent: 5994837 (1999-11-01), Willems et al.
patent: 6097137 (2000-08-01), Forsdyke et al.
patent: 6650041 (2003-11-01), Speer et al.
patent: 6653775 (2003-11-01), Speer et al.

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