Hod Lipson 2003-05-29
A simulation of the Peaucellier straight-line linkage for tracing an exact straight line. The line is generated by an 8-link compund mechanism that exploits transformations known as geometric inversors. This is an abstract model where the frame and supports have been removed, leaving only the moving links and their constraints. Click and drag any ungrounded joint up and down, and watch the right tip trace a straight line. Modify the length of the center link slightly to trace an exact arc of arbitrarily large radius.