The four bar linkage is a type of mechanical linkage that ... started with Archimedes who applied geometry to the study of the lever, but a full mathematical description had to wait until the ...

Of course he didn’t (YouTube). Instead, he wrote a simulator that lets him try out various custom linkages in real time. It’s a Windows-only application (sigh), but it’s free to use ...

A lever is a simple mechanism that uses a bar to pivot around a fixed point called a fulcrum. Levers can be joined together to form linkages. Simple linkages can be used to change the direction of ...