Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 995
Fig. 399 Hydraulic Elevators 967 allows them to revolve freely around the studs upon whichthey are mounted. The frame I is suspended from a ropethat passes over the two small sheaves resting on top of theoverhead beams. The end of this rope extends downward^,outside of the elevator hatchway^ and…
