Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . Hoisting-Machine Si C zthar i [From Harper ) the wooden conductor n. The eccentrics are upon,con- Fig. nectedwith spi-ral springs,which tend torotate them,and bring thetoothed partagainst the con-ductor n ; butso long as theroperemainsin-tact, the work-ing faces of theeccentrics are

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