DEVICE FOR SHOWING RULED SURFACES Russian patent published in 1995 - IPC

FIELD: educational means. SUBSTANCE: device has base and rods attached to the base. There are guides in the plane of the base made in form of a row of pins fixed onto the base. Flexible elements are attached to guides and rods; any flexible element has one end fastened to the guide and the other end is attached to the rod. Flexible element may represent parts of indivisible flexible element which goes round points of fixing in sequence at guides and rods according to law predetermined. Moreover, single rod at least is mounted onto the base through ball joint. EFFECT: widened functional capabilities. 1 dwg