Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 370
ing the position of the rope Xo. 1, it will be seen that by it the right hand one of DERRICK. 367 these blocks can be raised or lowered by means of the crank, pinion, geer and barrel. No. 1 of thecrab, at the opposite end of the boom; in a similar way, the left hand block is raised by rope No.… … Scale.—6 feet=l inch. nwards. Again, if rope No. 1 alone be slackened, the weight is lowered and tends inwards, and again ifNo. 2 he slackened, the weight is lo wered outwardly ; by these means the stone may be deposited atany spot within reach of the boom.DISC ENGINE. See Engine. 368 DISTILLATION…
Mechanical engineering · Mechanics · Engineering
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