An apparatus for use in the preparation of views in perspective (Machine-translation by Google Translate, not legally binding)

摘要

Apparatus for the direct determination of a perspective view from two projections of an object in planes at right angles to each other, comprising a carriage mounted for movement along a rectilinear guide as a function of the angles of sight measured from a point of it looks predetermined, a secondary guide mounted on said carriage at right angles to said secondary guide and a rotating cylindrical diagram marked with a set of curves of the apparent heights of the points on the object corresponding to each real height in a plane of reference according to the separation of said points from the point of view, said diagram being arranged along said secondary guide with its axis parallel to the trajectory of the movement of said cursor along said secondary guide. (Machine-translation by Google Translate, not legally binding)