| 摘要 |
PURPOSE:To facilitate the confirmation during operation, by lifting colored liquid by the turning of impellers provided at the outer surface part of a number displaying rotary drum. CONSTITUTION:A doughnut shaped chamber 3 is provided at the outer surface part of a number displaying rotary drum 2. Transparent blades 4 are provided in the chamber 3 in an impeller shape. A transparent material is used for a surface part 5 for displaying the number. In this chamber 3, two kinds of liquids are sealed tightly. One liquid is transparent, and the other is the colored liquid, which is not mixed with said liquid and has slightly heavy specific gravity. When the rotary drum 2 is rotated, the colored liquid 6, which is sedimented at the lower part of the doughnut shaped chamber 3, is lifted by the blades 4. When the blade 4 is turned from the horizontal attitude, the colored liquid 6 falls down bit by bit. |
