Linear motion

motion along a dimension of length (straight line in space)

motor

mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle

actuator that creates motion in a straight line

mechanical linkage that converts rotary motion to approximately-straight motion, invented by James Watt

mechanical linkage capable of transforming rotary motion into linear motion

six-bar straight-line mechanism

machine element for guiding a component along a straight line

four-bar straight-line mechanism

mechanisms that provide a perfect straight line motion without sliding guides

mechanisms generating real or approximate straight line motion

abstract line added to convey movement