Movement No. 54 presents the Mangle Wheel in its star-wheel form — a mechanism designed to produce alternating rotary motion from a continuous unidirectional input. While Movement No. 36 introduced the classic mangle wheel with a pinion traveling inside and outside a continuous tooth track, Movement No. 54 presents a related but distinct variation: the star wheel configuration. The star wheel is a gear wheel with teeth or projections arranged around its periphery in a star-like pattern, combined with a driving element that engages these projections in sequence. The key characteristic shared with the mangle wheel family is the ability to produce reciprocating — back-and-forth — rotary output from a continuously rotating input, without requiring the input to reverse its direction. As the driving element rotates continuously in one direction, it engages the star wheel’s projections alternately on one side then the other, pushing the star wheel first in one rotational direction, then reversing it — creating the characteristic alternating rotary motion. This type of mechanism was historically used in mangle machines for pressing and wringing laundry, where the rollers needed to reverse direction periodically to feed the fabric back and forth. The alternating output is also useful in winding mechanisms, textile machinery, and any application where a periodic reversal of rotational direction is required from a continuously running prime mover. The star wheel’s simple, robust geometry makes it well suited for transmitting significant force while producing this alternating motion reliably and repeatedly.
54. Mangle or star-wheel, for producing an alternating rotary motion.