Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 522
are transferred the length of their faces right and left; and as the sectors are edge shaped at their centreof motion o o, they necessarily revolve free from the impediment of rubbing surfaces, and consequentlywithout friction. When the eccentric wheels have made their revolution, the follower will…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
