Scott Russell linkage

The linkage is named after John Scott Russell (1808–1882), although watchmaker William Freemantle had already patented it in 1803.

[1][2] A different form of the linkage has been used in a front-wheel-drive vehicle with solid rear axle to control lateral movement, and with a flexing elastomeric connection instead of the rolling or sliding connection.

The Evans 'grasshopper' linkage is a variant of a Scott Russell linkage which uses a long link to create a large enough arc to approximate a line.

The Bricard inversor directly incorporates the Scott Russell's links, replacing the previously required straight line connection and allowing for two exact straight line outputs at right angles.

If both ends are turned into sliding connections, it becomes a Trammel of Archimedes.