Transformation of linear movement of piston to rotation using an epicyclic gear train, uses gear ratio that ensures the path of one point is the diameter of a circle, which forms the course of the piston

摘要

The transformation between linear and rotary movement uses a property of an epicyclic gear with a ratio of 1:2. The points of the circumference of a circle rotating without sliding inside another circle of double the radius describe a path that is one of the diameters of the large circle. This diameter is the course of the piston.