Oldham coupling GIF.
The Oldham coupling was invented in 1821 by Irish engineer John Oldham, for use in paddle steamers. The first seagoing iron steamship, the Aaron Manby, used paddlewheels linked by an Oldham coupling.
https://s3-us-west-1.amazonaws.com/h...m_coupling.gif
https://s3-us-west-1.amazonaws.com/h...m_coupling.gif
