| 摘要 |
<p>PURPOSE:To prevent a phosphor coated film depositied on the inside of a glass valve from being peeld by gas jetted from an exhaust by drilling the exhaust hole of an exhaust tube on the axis of a flare tube. CONSTITUTION:An exhaust tube 23 is connected to the flare tube 22 of a stem 21, and an exhaust hole 25 is drilled through the joint part 24 of the flare tube 22. This exhaust hole 25, formed on the opposite side of the flare 26 of the flare tube 22, is with the concave groove 29 of a squeezed part 28 supporting the lead wire 27 of the stem 21 with a squeeze, and is further opened on the axis 30 of the flare tube 22. Moreover, a tungusten coil filament 31 is connected to the one end of the lead wire 27, and the squeezed part 28 is provided with a concave groove 29 on the exhaust hole 25 side. And the end part of said groove supports the lead wire 27 on the diameter of the flare tube 22 oncluding the axis 30 of the flare tube 22. Hereby, the peeling of a phosphor film can be prevented.</p> |
