INSTRUMENT FOR SIMULTANEOUS DRAWING ALGEBRAIC CURVES OF 2ND, 3RD AND 4TH ORDER

摘要

An instrument for simultaneous drawing algebraic curves of 2, 3and 4order comprises a rectangular lever, a rotary ruler, a horizontal crossbeam and a connecting rod connected dyads of slides, a link connected by a cross slider with a yoke and a dyad of sliders with a vertical crossbeam.