Hoisting Appliances (1906)
“ In the case of the sheave with wrought-iron arms, or spokes, Fig. 3, the load is transmitted around the rim to the side opposite its point of application and is carried from there to the hub and shaft by the tension of the spokes; in fact, from the method of construction, the spokes in this sheave act only by tension. The sheave is strong and rigid, and much lighter than [Pg 4] a cast-iron sheave of the same strength, so that there is less wear between it and the rope due to any slipping action when it is started or stopped. Fig. 4 Fig. ”
