| 摘要 |
PURPOSE:To obtain a sample having a constant weight readily, by varying the ratio between the length of openings, through which the sample at an arbitrary radius from the axial center of a rotary body is selectively passed, and the total length of a circumference, thereby performing the reduction at an arbitrary ratio accurately. CONSTITUTION:A sample feeder 9 is moved on a scaled supporting rod 8 and fixed at a sample falling position corresponding to a reduction ratio. Then, a turn table 2 is rotated by a motor 5, and a sample is inputted into the feeder 9. Then the sample falls through a lower end 12 and collected by a receiving pan 11 through openings 1 and 10. The ratio of the sample, which falls to a position separated by a radius (r) from an axial center Ao, becomes the ratio between the sum of the lengths of arcs on the opening 1 and the total length of a circumference. When both ends 1c and 1d of the opening 1 are made parallel with a central line 15, said ratio is continuously varied in the direction of the radius. By moving the feeder 9, the specified amount of the sample can be fed at an arbitrary reduction ratio. |
