The Springfield Arms Company existed only for a brief period in 1850 and 1851, making revolvers designed by its chief engineer, James Warner, before being driven out of business by Colt patent lawyers. During that time, Springfield (no relation to the arsenal) made a variety of models in .28, .31, and .36 caliber and with a variety of barrel lengths and other features (including a well-designed safety notch to allow the guns to be carried fully loaded safely). In an attempt to avoid patent infringement, Warner separated the cylinder rotation and firing mechanisms into two different triggers on some models, including this Navy pattern example. The front trigger would rotate and lock the cylinder, and then it would trip the rear trigger which released the sear and fired the gun. This was not sufficient to save him from copyright infringement suits, though, and only about 125 of the double-trigger Navy revolvers were made.