Fig. 3 represents the signal post, on the exterior of whichis a hand lever, K, working in a semicircular guide and turn-ing the sheave, J, within the post. To the circumference ofthis sheave, the wire, H, is fastened, passing therefrom overother sheaves for a distance of from 1,000 to 2,000 feet,…
Patents · Iron · Water · Machine · Consists · Scientific American · Sewing machine · Three inches · Takes place · Steam boiler · Judge benedict · Carbonic acid · Cast Iron · Steam engine · Stove pipe
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-401-267.webp)
![An illustration from A Dictionary of science, literature, and art [electronic resource]: comprising the history, description, and scientific principles of every branch of human knowledge; with the derivation and definition of all the terms in general use (1844)](https://img.insideoutlibrary.com/img/200/ia-62523189.5956.emory.edu-533-122.webp)
