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RESEARCH PAPERS

A Compendium of Line-Symmetric Four-Bars

[+] Author and Article Information
J. Eddie Baker

Department of Applied Mechanics, The University of New South Wales, P.O. Box 1, Kensington, N.S.W. 2033, Australia

J. Mech. Des 101(3), 509-514 (Jul 01, 1979) (6 pages) doi:10.1115/1.3454088 History: Received June 01, 1978; Online October 21, 2010

Abstract

Geometrical properties of linkages, such as parallelism of joint axes and symmetries, have previously been used to establish mobility. Because it was not until very recently that all relevant four-bar linkages had been isolated, it had not been possible to investigate the extent to which line-symmetry is significant in linkage mobility. In this paper, the concurrence or otherwise of line-symmetry and mobility is comprehensively studied as it applies to four-bar loops, resulting in the specification of the five distinct line-symmetric four-bars. Finally, a conclusion is drawn concerning the relationship between symmetries and linkage mobility.

Copyright © 1979 by ASME
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