| 摘要 |
A high pressure sodium vapor lamp comprising an alumina arc tube within an outer glass envelope is provided with a capacitive starting aid in the interenvelope space. The aid comprises a stiff wire which is pressed lengthwise against the side of the arc tube by a bimetal arm swinging in a plane normal to the lamp axis. Preferably the wire has a camber concave towards the arc tube which is flattened out at room temperature. In the event of a reclosure, the camber shortens the hot restart time.
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