Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 231
. tangent drawn from each side of the crank-path to the point e will give the extrememovements of the link e, and a line at right angles to this line and from the centre of thecrank-shaft on each side will divide the crank-path in two parts. The tool-holder, /, orplaner platen, travels over an… … Fig. 416,
Mechanical drawing
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-197-147.webp)
