![]() ![]() ![]() Some craftsmen were able to take advantage of this simple machine and develop it to the point where it would cut teeth as it laid them out instead of cutting wheels by hand with files, they used a file moving up and down in a slide mounted on a frame, which also carried the pattern and the wheel to be cut. ![]() Thus it was divided into exactly the same number of units as the pattern circle, and all that remained was to shape the teeth with suitable files. Once this was completed, he had only to center the wheel to be cut on the plate used as a pattern then using a rule or alidade pivoted at the center of the plate and laid in succession on each point dividing a given circle, he marked these divisions on the wheel. This practice was still followed not long ago, but those operations demanded a great amount of time, and how much accuracy could be expected from this method? However, one intelligent workman did not leave the craft in that state for long he saw a better way, which was to draw various concentric circles on a large brass plate, which he then divided into the numbers of units he used in the mechanisms he was making. The first means employed by workmen who had wheels to cut was marking out with dividers the number of units needed, then cutting them with files. Taillemard, a very good machinist who died about twenty years ago. I should have great difficulty in identifying the inventor of this splendid machine he is unknown to us, like almost all those who have made discoveries that are useful to the nation, while we know by name the inventors of several frivolous things.Īll I have been able to learn is that the machine comes from England, and the first to build one here was M. I need not pause to prove the usefulness of the engine (it is well known) my purpose must be to describe it, explain its various uses, and give the means or point out the care required in its construction. On it depends the quality of timekeepers like clocks, watches, etc., for whatever the nature of the regulator, if the teeth of the wheels and pinions are uneven, the imperceptible motion of the hands cannot be uniform, nor can the power of the driving force be even, unless the wheels themselves are so consequently, the regulator itself accelerates or slows as a result of those inequalities. The wheel cutting engine is a tool used by horologists to lay out and cut the teeth on the wheels of clocks, watches, etc., as required by the mechanisms for which the wheels are intended.įew machines are more essential to the crafts, and few whose accuracy is as critical, as the cutting engine. ![]() Originally published as "Fendre, machine à," Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers, 6:482–490 (Paris, 1756).Ĭutting, wheel. Ann Arbor: Michigan Publishing, University of Michigan Library, 2018. "Wheel cutting engine." The Encyclopedia of Diderot & d'Alembert Collaborative Translation Project. of "Fendre, machine à," Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers, vol. Please see for information on reproduction.īerthoud, Ferdinand. This text is protected by copyright and may be linked to without seeking permission. ![]()
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