Involute can be generated by tracing the end of thread winding on a circular surface keeping the thread always tight.
Curve generated by a point situated either within or outside the generating circle when it rolls without slipping on the circumference of another circle and inside it.
Shape of the curve generated by a point on circumference of circular plate when the plate is rolling inside circle of radius equal to diameter of circular plate.
Name of the curve generated by end of the spoke touching the Rim of wheel, when wheel is moving on a straight road.
Name of the curve generated by ends of rolling stick over circular plate without slipping.....