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Scientific American, Vol. 42, No. 20 (1880) (1880)
leaf 3
I, are two drums, upon each of which are wound two chains, J K.. The chain, J, in front of one of the trucks; and Fig. 3 is an inverted plan in its place. runs downward around a sheave on the truck timber, thence The nut on the spindle, G, is then turned so‘as to raise view, showing the apparatus… … © 1880 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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