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<p>[QUOTE=&quot;conderluva, post: 1282050, member: 21717&quot;]Just found a brief article in the esylum archives on the topic.</p><p><br /></p><p>&quot;In all, there have been 22 people, firms and mints who had&nbsp;&nbsp; a part in developing this equipment throughout history.&nbsp; It&nbsp;&nbsp; has gone through five stages. </p><p><br /></p><p>The first stage was little more&nbsp;&nbsp; than a rotating drill (with a string bow like a Boy Scout&nbsp;&nbsp; starting a fire). It was used for cameo cutting.&nbsp; &nbsp; </p><p><br /></p><p>The second stage applied peddle power to the fixed drill or&nbsp;&nbsp; cutter (peddled like an old sewing machine) for early die cutting. </p><p><br /></p><p>&nbsp; In the third stage water or steam was added as the power source&nbsp;&nbsp; and devices were cut in dies and lettering would, of course, have&nbsp;&nbsp; to be added later with punches.&nbsp; &nbsp; </p><p><br /></p><p>Here you have Matthew Boulton using these machines at his&nbsp;&nbsp; Soho Mint and when his partner, James Watt, retired, he made&nbsp;&nbsp; refinements to Boulton&#039;s machines.&nbsp; The nationalities of the&nbsp;&nbsp; machinists who made improvements were French, British,&nbsp;&nbsp; Belgian and later, German. The U.S.Mint first had a French&nbsp;&nbsp; Contamin pantograph in 1836, which was replaced by a&nbsp;&nbsp; British Hill machine in 1867, and the French Janvier in 1906.&nbsp; &nbsp; By the third stage it was a &#039;controlled milling machine&#039; to&nbsp;&nbsp; cut dies. The pattern had to rotate in sync (synchronization)&nbsp;&nbsp; with the diestock being cut, both revolving on separate axis...&quot;</p><p><a href="http://www.coinbooks.org/esylum_v07n11a10.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.coinbooks.org/esylum_v07n11a10.html" rel="nofollow">http://www.coinbooks.org/esylum_v07n11a10.html</a>[/QUOTE]</p><p><br /></p>

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