Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 97
the hoisting chain, the weight ofthe cage instantly comes upon the counterbalancing ropes, and thelevers being drawn out, the teeth take into the rack and the cage isprevented from falling. The use of a counterbalance weight is of further service in re-ducing the work to be done by the hoisting… … hFr/n../. r,./ LI7 Jleius ri
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