Abstract

Abstract This paper explores the geometry of the Bennett linkage. Bennett, in the year 1903, invented a 4-R spatial linkage with two remarkable characteristics i.e. with 4 non-parallel and non-concurrent joint axes, has mobility one. In this paper the relationship among the intensities of the twists, i.e. four skew axes of the Bennett, and the perpendicular distances among the opposite skew axes of the Bennett linkage is established. The geometry of the three revolute joint axes of the Bennett Mechanism, one of the classical screw 3-system (Hunt (1978)), are not only skew but are independent to each other.

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