The fusee, the other mainspring compensation device, was much more efficient. England continued to make the bulkier full plate fusee watches until about 1900. As the fusee turns, the projection catches on the blade, preventing further winding. The gear on the fusee drives the movement's wheel train, usually the center wheel. In 1790, Robert Cox began to manufacture fusee chains in workshops in the High Street. The fusee is topped by the winding square (requiring separate key). As it is wound, the fusee chain rises toward the top of the fusee. The origin of the fusee is not known. This type is called a "going fusee". Thys calls his version a snek drive (after the Dutch term for Fusee (horology)). The fusee was a much more lasting idea. The fusee was a much longer-lasting innovation. Many keywind watch movements make use of a fusee, to improve isochronism. At first the fusee cord was made of gut, or sometimes wire. More commonly, however, a driptorch or a flare (fusee) is used.