A flailing machine with a ring is a device that allows minting coins with a raised edge , unlike a flailing machine , with which a pattern is applied to the smooth edge of an already finished coin.
For the first time for the manufacture of a raised edge, a ring-engraving machine was used in France in 1577 . A century later, such machines appeared in England , Denmark and Sweden .
In Prussia , open spring rings were used in milling machines, which were inserted into a closed ring for minting. In 1790, the Dro medalist invented split rings consisting of three or more parts. Such rings were installed in a thick frame, from which they were knocked out after the manufacture of each circulation of coins. There were also machines with a smooth ring, on which the minting of coins was carried out, with a edge previously formed on a milling machine.
Literature
- Fengler H., Girow G., Unger V. Dictionary of numismatics: Per. with him. M. G. Arsenyeva / Resp. Editor V. M. Potin. - 2nd ed., Revised. and add. - M .: Radio and communications, 1993. - S. 77-78. - 408 p. - 50,000 copies. - ISBN 5-256-00317-8 .