Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 986
wedge tighteragainst 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… … 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, shownmounted on…
