The motion coefficients and design methods for a wheel rolling externally or internally to a fixed wheel are given in Part I for linkage constraint satisfying up to 6 multiply separated positions. Part II provides design equations and graphical procedures in terms of the cubic circle and center point curves based on four symmetrical, multiply separated positions of the moving wheel. The important special case of an angular-circular transformer mechanism with constant mechanical advantage is treated in detail for four positions in Part III.

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