Forsyth, Alexander John

▪ British inventor
born Dec. 28, 1769, Belhelvie, Aberdeenshire, Scot.
died June 11, 1843, Belhelvie

      Scottish Presbyterian minister and inventor who between 1805 and 1807 produced a percussion lock for firearms (gun) that would explode a priming compound with a sharp blow, thereby avoiding the priming powder and free, exposed sparks of the flintlock system.

      The son of a minister, Forsyth decided to follow his father's profession and in 1790 became his successor when the elder Forsyth died. He began experimenting with firearms in his spare time, initially trying to improve on priming powders then in use. His first percussion system, developed in 1805, involved a small steel box, called the “scent bottle,” that rotated at the breech end of the barrel and left a small charge of potassium chlorate in a small nipple leading into the barrel. This primer was then detonated by the impact of a falling hammer. When he took his device to London the following spring, the master general of ordnance provided him with work space in the Tower of London, and by 1807 Forsyth had patented a system that worked in existing firearms. A new master general abruptly terminated the work, however, and Forsyth spent the following decade and a half producing hunting firearms and protecting his patent from competitors. He was finally awarded a small pension by the government but died before the first installment reached him.

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Universalium. 2010.

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