| 摘要 |
Calipers for automeasuring of radius, comprises arms (1) and (2), a needle (3), a graphite grain (4), a support (5), a segment of circular ring (6) and a scale (7). Arms (1) and (2) are coupled in a point (B). Angle (θ) between the arms (1) and (2) is adjusted according to the reduction and separation. The segment of a circular ring (6) is on one side fixed to the internal side of the arm (1), and it freely passes through an opening inside the arm (2). On the segment of the circular ring (6) there is a scale (7) whereon one may read a radius dimension (r) of the circle drawn by a caliper to the angle (θ). Gauging of this scale is carried so that the distance between the point (A) and the top of the graphite grain (4) is determined to a certain value, and then where cross section of the internal side of the arm (2) and the segment of the circular ring (6) is, an appropriate marker positioned and that value is entered in, provided that it is a whole number. |
