Rotary drive cam reciprocating slide - fits without play in slide window and has equilateral triangular shape with rounded angles and convex sides

摘要

The cam (3) is of an approximate equilateral triangular form with rounded angles and tangential convex sides. It is located without play in the rectangular window of a slide, and is rotated to impart reciprocal linear motion to the slide. The window has a side of length (2a) whilst the amplitude of the mechanism (2b). The cam (3) edge profile (C) is defined by the equation x cos A + y sin A = a+bf(A), where f(A) is an odd number, and is the polar angle with reference to orthogonal axes (OXY). (O) is the axis of cam rotation and f(A) may equal cos 2n+1 A with n equalling 1.