Mangle wheel

mangle man"gle, n. [D. mangel, fr. OE. mangonel a machine for throwing stones, LL. manganum, Gr. ? a machine for defending fortifications, axis of a pulley. Cf. {Mangonel}.] A machine for smoothing linen or cotton cloth, as sheets, tablecloths, napkins, and clothing, by roller pressure, often with heated rollers. [1913 Webster]

{Mangle rack} (Mach.), a contrivance for converting continuous circular motion into reciprocating rectilinear motion, by means of a rack and pinion, as in the mangle. The pinion is held to the rack by a groove in such a manner that it passes alternately from one side of the rack to the other, and thus gives motion to it in opposite directions, according to the side in which its teeth are engaged.

{Mangle wheel}, a wheel in which the teeth, or pins, on its face, are interrupted on one side, and the pinion, working in them, passes from inside to outside of the teeth alternately, thus converting the continuous circular motion of the pinion into a reciprocating circular motion of the wheel. [1913 Webster]