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 980
ighter k^against the guide, but producing an additional retardingforce. When a car is caught by the safety, all that is neces- Hydraulic Elevators 951 sary to release it is to start in the upward direction, and theforce exerted by the lifting cylinder is enough to overcomethe friction of the wedges… … Fig. 392 a very high velocity when the ropes do not break, and onthat account it is necessary to arrange the safety so thatit will act when the speed reaches a certain stage regard-^less of the cause of increased velocity. This is accom-plished by means of the Otis safety governor, shown^mounted on…
