120 Trammel

A very useful tool for drawing ellipses. It comprises a cross, A, with grooves and a bar, B, with pins, C, attached to sliding blocks in the grooves, and a pen or stylus, D, at the projecting end of the bar to scribe the ellipse.

118 Stud Studding 121 Turret facebooktwittergoogle_plusredditpinterestlinkedinmail