Coining By Lever Press
Between 1817 and 1830 the German engineer Dietrich "Diedrich" Uhlhorn invented the Presse Monétaire (level coin press known as Uhlhorn Press) which bears his name. Uhlhorn invented a new type of minting press (steam driven knuckle-lever press) that made him internationally famous; over 500 of the units had been sold by 1940. The advanced construction of the Uhlhorn press proved to be highly satisfactory, and the use of the screw press for general coinage was gradually eliminated.
Read more about this topic: Mint (coin)
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