A superposed load or stacked charge or superimposed load is a method used by various muzzle-loading firearms, from matchlocks to caplocks, including a few modern weapons, such as Metal Storm, to fire multiple shots from a single barrel without reloading. [1] In a sense, superposed load guns were the first automatic firearms, as they fired multiple shots per pull of the trigger.
Superposed loads are loads that are placed in the barrel, one in front of the other, so that there is an alternating sequence of (starting from the breach end) powder, ball, powder, ball, etc., for the desired number of charges. Each charge is accompanied by a corresponding touch hole that allows ignition of that charge. In the simplest case, the matchlock, each touch hole is individually primed and ignited with the match, front to rear. Each ball behind the first acts as a seal, to prevent ignition of the next charge. [1]
Flintlocks using superposed charges often involved a sliding lock, that slid along the barrel and locked in place at each successive touch hole. The lock would be primed, cocked, and fired at each touch hole to discharge successive charges. Some caplock designs used multiple hammers, each impacting a nipple leading to a different charge, allowing true rapid fire. [1]
Designs using superposed loads have appeared periodically throughout firearms history, though they have met with only limited success. They have always been plagued with issues of sequential charges firing together, which can result in a burst barrel and injury to the user. [1]
A firearm is any type of gun that uses an explosive charge and is designed to be readily carried and operated by an individual. The term is legally defined further in different countries.
The percussion cap, percussion primer, or caplock, introduced in the early 1820s, is a type of single-use percussion ignition device for muzzle loader firearm locks enabling them to fire reliably in any weather condition. Its invention gave rise to the caplock mechanism or percussion lock system which used percussion caps struck by the hammer to set off the gunpowder charge in rifles and cap and ball firearms. Any firearm using a caplock mechanism is a percussion gun. Any long gun with a cap-lock mechanism and rifled barrel is a percussion rifle. Cap and ball describes cap-lock firearms discharging a single bore-diameter spherical bullet with each shot.
A muzzleloader is any firearm in which the user loads the projectile and the propellant charge into the muzzle end of the gun. This is distinct from the modern designs of breech-loading firearms, in which user loads the ammunition into the breech end of the barrel. The term "muzzleloader" applies to both rifled and smoothbore type muzzleloaders, and may also refer to the marksman who specializes in the shooting of such firearms. The firing methods, paraphernalia and mechanism further divide both categories as do caliber.
In firearms terminology, an action is the functional mechanism of a breech-loading firearm that handles the ammunition cartridges, or the method by which that mechanism works. Actions are technically not present on muzzleloaders, as all those are single-shot firearms with a closed off breech with the powder and projectile manually loaded from the muzzle. Instead, the muzzleloader ignition mechanism is referred to as the lock.
Flintlock is a general term for any firearm that uses a flint-striking ignition mechanism, the first of which appeared in Western Europe in the early 16th century. The term may also apply to a particular form of the mechanism itself, also known as the true flintlock, that was introduced in the early 17th century, and gradually replaced earlier firearm-ignition technologies, such as the matchlock, the wheellock, and the earlier flintlock mechanisms such as the snaplock and snaphaunce.
A wheellock, wheel-lock, or wheel lock is a friction-wheel mechanism which creates a spark that causes a firearm to fire. It was the next major development in firearms technology after the matchlock, and the first self-igniting firearm. Its name is from its rotating steel wheel to provide ignition. Developed in Europe around 1500, it was used alongside the matchlock, the snaplock, the snaphance, and the flintlock.
A matchlock or firelock is a historical type of firearm wherein the gunpowder is ignited by a burning piece of flammable cord or twine that is in contact with the gunpowder through a mechanism that the musketeer activates by pulling a lever or trigger with their finger. This firing mechanism was an improvement over the hand cannon, which lacked a trigger and required the musketeer or an assistant to apply a match directly to the gunpowder by hand. The matchlock mechanism allowed the musketeer to apply the match himself without losing his concentration.
A snaphance or snaphaunce is a type of firearm lock in which a flint struck against a striker plate above a steel pan ignites the priming powder which fires the gun. It is the mechanical progression of the wheellock firing mechanism, and along with the miquelet lock and doglock are predecessors of the flintlock mechanism.
A repeating rifle is a single-barreled rifle capable of repeated discharges between each ammunition reload. This is typically achieved by having multiple cartridges stored in a magazine and then fed individually into the chamber by a reciprocating bolt, via either a manual or automatic action mechanism, while the act of chambering the round typically also recocks the hammer/striker for the following shot. In common usage, the term "repeating rifle" most often refers specifically to manual repeating rifles, as opposed to self-loading rifles, which use the recoil, gas, or blowback of the previous shot to cycle the action and load the next round, even though all self-loading firearms are technically a subcategory of repeating firearms.
The flintlock mechanism is a type of lock used on muskets, rifles, and pistols from the early 17th to the mid-19th century. It is commonly referred to as a "flintlock". The term is also used for the weapons themselves as a whole, and not just the lock mechanism.
The lock of a firearm is the mechanism used to initiate firing. It is generally used as a historical term, referring to such mechanisms used in muzzle-loading and early breech-loading firearms, as modern firearms uniformly fire by use of a firing pin to strike the rear of a cartridge. Side-lock refers to the type of construction, in which the individual components of the mechanism are mounted either side of a single plate. The assembly is then mounted to the stock on the side of the firearm. In modern firearm designs, the mechanism to initiate firing is generally constructed within the frame or receiver of the firearm and is referred to as the firing or trigger mechanism.
A snaplock is a type of lock for firing a gun or is a gun fired by such a lock.
A touch hole, also known as a cannon vent, is a small hole at the rear (breech) portion of the barrel of a muzzleloading gun or cannon. The hole provides external access of an ignition spark into the breech chamber of the barrel, either with a slow match (matchlock), a linstock or a flash pan ignited by some type of pyrite- (wheellock) or flint-based gunlock, which will initiate the combustion of the main gunpowder charge. Without touch hole, it would be nearly impossible to ignite the powder because the only otherwise access into the barrel is from the front via the muzzle, which is obturated by the projectile.
The flash pan or priming pan is a small receptacle for priming powder, found next to the touch hole on muzzle-loading guns. Flash pans are found on gonnes, matchlocks, wheellocks, snaplocks, snaphances, and flintlocks.
A handgun is a firearm designed to be usable with only one hand. It is distinguished from a long barreled gun which typically is intended to be held by both hands and braced against the shoulder. Handguns have shorter effective ranges compared to long guns, and are much harder to shoot accurately. While most early handguns are single-shot pistols, the two most common types of handguns used in modern times are revolvers and semi-automatic pistols.
In firearms, the cylinder is the cylindrical, rotating part of a revolver containing multiple chambers, each of which is capable of holding a single cartridge. The cylinder rotates (revolves) around a central axis in the revolver's action to sequentially align each individual chamber with the barrel bore for repeated firing. Each time the gun is cocked, the cylinder indexes by one chamber. Serving the same function as a rotary magazine, the cylinder stores ammunitions within the revolver and allows it to fire multiple times, before needing to be reloaded.
The Kalthoff repeater was a type of repeating firearm that was designed by members of the Kalthoff family around 1630, and became the first repeating firearm to be brought into military service. At least nineteen gunsmiths are known to have made weapons following the Kalthoff design. Some early Kalthoff guns were wheellocks, but the rest were flintlocks. The capacity varied between 5 and 30 rounds, depending on the style of the magazines. A single forward and back movement of the trigger guard, which could be done in 1–2 seconds, readied the weapon for firing. The caliber of Kalthoff guns generally varied between 0.4–0.8 in (10–20 mm), though 0.3 in (7.6 mm) caliber examples also exist.
The Belton flintlock was a repeating flintlock design using superposed loads, conceived by Philadelphia, Pennsylvania, resident Joseph Belton some time prior to 1777. The musket design was offered by Belton to the newly formed Continental Congress in 1777. Belton wrote that the musket could fire eight rounds with one loading, and that he could support his claims "by experimental proof." Belton failed to sell the musket to Congress, and later was unable to sell the design to the British Army a year after the American Revolution. There are no records that indicate that the gun was ever supplied, and it is uncertain if or how exactly the Belton improvement operated.
A multiple-barrel firearm is any type of firearm with more than one gun barrel, usually to increase the rate of fire or hit probability and to reduce barrel erosion or overheating.
In firearms and artillery, the primer is the chemical and/or device responsible for initiating the propellant combustion that will propel the projectiles out of the gun barrel.
Diary of Samuel Pepys, Thursday, 3 July 1662 .