A one-page dictionary entry on thread winders, machines for spooling thread, from Knight's American Mechanical Dictionary. It describes a winder in which a friction wheel drives the spool and a cam-traversed thread guide lays the thread evenly. It also describes a machine that lays exterior layers of button-hole twist on a spool in patterns, and shows a thread-winding guide. Illustrated with Figs. 6407-6410.