Model: S37 Four-bar Linkage with Parallelogram Straight-line Mechanism
This model is in essence a four-bar mechanism with a parallelogram or 'pantagraph' copying extension not unlike the Watt steam engine straight-line mechanism. The Voigt catalog calls this mechanism an 'Ellipse linkage with stork's bill', (Storchschnabel, in German) This description is not clear since the four-bar is not an exact ellipse drawing mechanism. The 'stork's bill may refer to Model S-36 which also has a parallelogram extension and looks like a pecking bird in motion.
Francis Moon 2003-07-01
- Durley : Kinematics of Machines (pp 84, 87, 136, 167., 1907)
- Reuleaux, Kennedy : Kinematics of Machinery (p.21, 1876)
- Tutorials and Descriptions : Brief Description of the Mathematics Behind the Peaucellier-Lipkin Linkage
- Tutorials and Descriptions : How to Draw a Straight Line