EXPLANATORY IMPLEMENT FOR MEASUREMENT THEORY BY MICROMETER

摘要

PURPOSE:To constitute an explanatory implement so that even a beginner can understand easily the measurement theory by spreading out graphically and planely a micrometer so that its inside can also be seen from the outside, and measuring the length of an object to be measured by the same theory as the micrometer. CONSTITUTION:On a substrate 14, a frame graphic 15 corresponding to a fixed measuring part of a micrometer, and a sleeve scale 18 are displayed in a pre scribed position. On this substrate 14, a freely slidable sliding plate 20 is pro vided, and on the sliding plate 20, a spindle graphic 23 corresponding to a mov able measuring part of the micrometer is displayed, and on the sliding plate, a thimble plate 26 is provided, and a thimble scale 27 is displayed thereon. Also, a guide part 28 inclined by a lead angle theta portion for screwing a sleeve and a thimble is provided on the sliding plate. In this constitution, the sliding plate 20 and the thimble plate 26 are allowed to slide, and by reading each numerical value of an intersection of the thimble scale 27 and the sleeve scale 18, length l of a measuring body can be measured by the same theory.