Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 121
Fig. 144. … Fif/. 140 Iiy. 143. SHEAVES WITH WROLXIHT IRUX ARMS. PATTERN MAKING, 69 SHEAVES WITH WROUGHT IRON ARMS. AN ORIGINAL WAY OF MAKING THE HUB. The style of sheave shown in Fig. 138 is used exten-sively in mines for carrying rope; the arms, whichspread on either side, act like stay-rods to the…
Patternmaking
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-1083-683.webp)
