slotted link

This action is via a slotted link or Whitworth link.

The other end of the actuating lever is attached to a die block which slides in a slotted link.

The Scotch yoke (also known as slotted link mechanism) is a reciprocating motion mechanism, converting the linear motion of a slider into rotational motion, or vice versa.

If I have to use a new slotted link each time I swap them over it won't be very economical and the chain will probably end up consisting of slotted links.

In 1841 two employees in Stephenson's locomotive works, draughtsman William Howe and pattern-maker William Williams, suggested the simple expedient of replacing the gabs with a vertical slotted link, pivoted at both ends to the tips of the eccentric rods.