The practical mechanic : comprising a clear exposition of the principles and practice of mechanism, with their application to the industrial arts (1887)
Drake, J. A · Philadelphia : J.W. Lukenbach · leaf 161
es ; from them the form of the tooth is de- scribed on the bevelled face of the wheel. If the form of the tooth is described on the largest circle of the wheel, all the lines from this face run to the point C, so that when the wheel revolves around its axis, all the lines, from the teeth… … side motion of the wheel and screw is accelerated; and when the threads and number of teeth are equal, an angle of 45° is required for teeth and thread, provided their diameters also are equal. This motion causes a great deal of friction, and it is only resorted to where no other means can be…
Industrial arts · Technology · Workshop recipes
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-917-412.webp)
