INSTRUMENT FOR SIMULTANEOUS CONVERSION OF THE CIRCLE INTO PARABOLA AND CURVE OF THE 3RD ORDER OF THE TYPE PERLYNA

摘要

An instrument for simultaneous conversion of the circle into parabola and curve of the 3rd order of the type "Perlina" contains a traverse and a master vertical bar connected together with hinges and sliders. It additionally contains a rectangular guide with the cuts, in apex of which a hinged slider is mounted, through which the arm of rectangular lever passes.