| 摘要 |
PURPOSE:To accurately prevent the material for amalgam formation from falling into a luminous tube by providing a rod-shaped body with one or more holes on the side near an exhaust hole formed in the capillary of the luminous tube and the material for amalgam formation on the side far from the exhaust hole, respectively. CONSTITUTION:An exhaust hole 8 is formed on one end side of a capillary 7. A rod-shaped body 9 made of a hollow glass tube and material 10 for amalgam formation made of bismuth, indium, lead, etc. are inserted in this capillary 7 on the side near the exhaust hole 8 and on the side far from it, especially and then the other end of the capillary tube 7 is sealed. The other end of the other capillary is sealed after the exhaust process inside a luminous tube 1 is completed. Consequently, the space enough to facilitate the passing of mercury vapor is formed by a hole formed on the rod-shaped body 9. As a result, the mercury vapor pressure can fully be regulated by an amalgam effect. |
