Gatling Gun
a machine gun, invented by Richard J. Gatling. The gun consists of a series of barrels in combination with a grooved carrier and lock cylinder. The main features of the gun are: (1) Each barrel in the gun is provided with its own independent lock or firing mechanism. (2) All the locks revolve simultaneously with the barrels, carrier and inner breech, when the gun is in operation. The locks also have a reciprocating motion when the gun is rotated. The gun cannot be fired when either the barrels or locks are at rest.