In 1928, Henry Scudder described how to use a carpenter's square to trisect an angle. We use the ideas behind Scudder's technique to define a trisectrix—a curve that can be used to trisect an angle. We also describe a compass that could be used to draw the curve.
Richeson, David S., "A Trisectrix From a Carpenter's Square" (2017). Dickinson College Faculty Publications. Paper 1414.