THE 1860s
'The drawing accompanying an 1862 weapons patent by this man is <a href="http://www.j-archive.com/media/2004-07-12_J_23.jpg" target="_blank">seen</a> <a href="http://www.j-archive.com/media/2004-07-12_J_23a.jpg" target="_blank">here</a>'
Gatling