INSTRUMENT FOR SIMULTANEOUS DRAWING OF OVALS AND TRANSCENDENT CURVE

摘要

An instrument for simultaneous drawing of ovals and transcendent curve contains a horizontal fixed ruler connected at the basis by hinge with a rotary ruler connected by hinged dyad of sliders with the link. The instrument is equipped with horizontal mobile ruler, which is connected with cross-shaped slider with vertical mobile ruler, which is hingedly attached to the T-shaped slider.