Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 431
pulleys B B will then be moved at the same speed as the wheel D and the pulleys A A; hence theweight required to keep the wheels R R in their present position, is equal to the weight required tomove the pulleys B B. The weight thus required, is found by means of the lever H J. The arm H isattached…
Mechanical engineering
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-507-340.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-553-371.webp)
