| 摘要 |
A linear measurement device having a digital readout provides rapid and direct measurement of center-to-center, center-to-edge and edge-to-edge distances. The device includes an endpiece assembly secured to an elongate beam. A slider assembly is disposed on the beam for bi-directional translation therealong and includes an electronic distance measuring and readout assembly. The endpiece assembly and the slider assembly each include portions of three sets of locating structures which cooperate to position the slider relative to the beam to effect linear measurement. A first set of locating structures comprises a pair of cones for locating the centers of circles and measuring therebetween. The second set of locating structures comprises a cone and a pin for measuring the distance of the center of a circle from an edge. The third set of locating structures includes two pairs of pins disposed in parallel spaced relationship for making edge-to-edge and diagonal measurements.
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