Amalgam assembly and fluorescent lamp

摘要

An amalgam assembly for a fluorescent lamp (10) includes an exhaust tubulation (20) closed at a free end thereof (24), a glass ball (40) disposed in the tubulation (20), and a mercury amalgam body (32) disposed in the tubulation (20) between the glass ball (40) and the tubulation closed end (24). The tubulation (20) is provided with a pinched portion (22) comprising a plurality of inwardly extending dimples (26) separated from each other and adapted to engage the glass ball (40) to retain the glass ball (40) on a central axis of the tubulation (20). The glass ball (40) rests on the dimples (26) concentrically and gaps between the dimples (26) allow gas to pass therethrough between the glass ball (40) and an inside surface (30) of the tubulation (20).