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Scientific American, Vol. 54, No. 17 (April 1886) (1886)
leaf 7
The greater resistance to slipping is obtained, and the- of four threads we get three, and the total pitch be- first kind has usually three rollers of equal diameter, blank slips on the larger rollers, which thus become comes % in. instead of 1 in., the other 14 in. being sup- revolving in the same… … IMPROVED SCREW FORGING MACHINE. © 1886 SCIENTIFIC AMERICAN, INCPatented · Patents · Apparatus · Rollers · Munn · Scientific American · Wheel shaping · Potash solution · American supplement · Express money · Address munn · Wood working · Cubic feet · Power loom · Liquid fuel
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