Old Linkages 7 Angle Splitter 1

Description

From the book "How to Draw a Straight Line; A Lecture on Linkages", by A.B. Kempe, London, 1877. This is a series of linkage mechanisms, really old, but still interesting and useful. In this mechanism, four bars (1 fixed red and 3 moving blue) split from each other, with the same exact angle between each two of them. Scheme at https://br.pinterest.com/pin/479070479118547712.