Patent ID: 6061922
Filing Date: 2000-05-16
Classification: G01B

Abstract:
A length correction device comprising:a rail including two side plates formed with two elongated slots and two fixing blocks fixedly mounted between said side plates;a seat including a main body, a collar, a packing and a knob, said main body having a circular cap, a cylindrical portion extending from said circular cap and adapted to fit into one of said slots, and a threaded portion extending from said cylindrical portion, said cylindrical portion having a threaded hole, said collar having a diameter larger than the width of at least one of said slots and having a center hole adapted to receive said cylindrical portion of said main body, said collar having a threaded hole aligned with said threaded hole of said main body, said packing having a center hole, said knob having a cylindrical body formed with a neck and a threaded hole;a screw rod for engaging the seat having a cylindrical head with a plurality of holes, an elongated threaded portion, and a groove close to a free end of said elongated threaded portion; anda rectangular block for engaging the screw rod formed with a threaded hole and a recess at one side thereof and two pin holes and a threaded hole at a lateral side thereof; anda positioning plate 47 fixedly mounted on said rectangular block.