A design technique which makes use of the unique inflection circles that result when the instant center (pole) falls at a fixed pivot or at a link pivot is developed to synthesize a 4-bar linkage which has a point or points on its coupler plane which trace two straight-line motions of specified angular displacements for two adjustments of a “fixed” pivot. When combined with an adaptation of the Euler-Savary equation, this technique can be used to synthesize a 4-bar linkage having a coupler point which traces three straight-line motions for three specified adjustments of a fixed pivot.
Synthesis of 4-Bar Linkages Adjustable for Several Approximate Straight-Line Motions of a Coupler Point
C. B. Beaudrot
U. S. Army, Jet Propulsion Laboratory, Pasadena, Calif.
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Beaudrot, C. B. (February 1, 1969). "Synthesis of 4-Bar Linkages Adjustable for Several Approximate Straight-Line Motions of a Coupler Point." ASME. J. Eng. Ind. February 1969; 91(1): 172–178. https://doi.org/10.1115/1.3591506
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