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.

See also: mangle

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.