Revolvers

Until the mid-1840s most pistols were single-shot muzzle-loaders fired by wheel lock, flintlock, and percussion ignition systems. In 1835 king Colt patented the first successful percussion revolver. In the frame of this weapon was a revolving cylinder drilled with several chambers (usually five or six), into which powder and ball (or combustible paper cartridges containing powder and ball) were loaded from the front. In the rear of each chamber a percussion cap was placed over a hollow nipple that directed the jet of flame to the powder when the cap was struck by the hammer. This type of revolver was eventually called “cap-and-ball.” Where earlier revolvers required the shooter to line up a chamber with the barrel and cock the hammer in separate steps, Colt devised a single-action mechanical linkage that rotated the cylinder as the hammer was cocked with the thumb