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The original patent filed by Hermann Gerlich in 1932 [6]. The squeeze bore concept was first patented by German inventor Carl Puff in 1903 [7] [8], even though the general principle was known already in 19th century and later applied in lighter fashion on Armstrong guns, on which only the muzzle yet not the barrel itself was of slightly smaller diameter (to cast off the sealing leather-bag ...
Machine shut-off nozzles serve as the connection between the plasticizing barrel (with reciprocating screw) and the mold. They are mounted on the machineside of the plastic injection molding process, unlike hot runner nozzles which are mounted on the moldside of the process. Machine shut-off nozzles differ from open nozzles because of their ...
This is a problem in many manufacturing processes, especially the firearms industry: the barrel of a gun must be very straight and accurately sized. Gun barrels are far longer than their inside diameter; as an example, the .223 inches (5.7 mm) caliber barrel of the M16 rifle is 20 inches (510 mm) long, nearly 90 times the diameter of the bore ...
A female worker boring out the barrel of a Lee-Enfield rifle during WWI. Gun barrels are usually made of some type of metal or metal alloy.However, during the late Tang dynasty, Chinese inventors discovered gunpowder, and used bamboo, which has a strong, naturally tubular stalk and is cheaper to obtain and process, as the first barrels in gunpowder projectile weapons such as fire lances. [2]
View down the barrel of a L16 81mm mortar, showing the fixed firing-pin. Many revolvers use a firing pin that is fixed to the hammer. Simple blowback sub-machine guns that fire from the open-bolt position often have a fixed firing pin that protrudes from the face of the bolt. As the bolt fully closes on the breech the primer of the newly ...
The original Rock Island FPW had an 11-inch (280 mm) barrel, while the Colt prototypes and the production M231 both had 15.6 inch (396 mm) barrels. Initially the FPWs had no locking mechanism and had flip up sights, along with a metal wire stock akin to that on the M3 submachine gun, to allow the weapon to be used outside of the vehicle more ...
The Montigny mitrailleuse was an early type of crank-operated machine-gun developed by the Belgian gun works of Joseph Montigny between 1859 and 1870. It was an improved version of the "Mitrailleuse", (English: Grapeshot shooter) invented by Belgian Captain Fafschamps in 1851 which was a fixed 50-barrelled volley gun.
Described as a "supergun", the infernal machine was designed to fire 25 rifle barrels at the same time. Each barrel was originally believed to have been loaded with eight bullets and twenty lead pellets, [1] but a thorough inspection of the misfired barrels by Jean Le Page, Arquebusier Ordinaire to the King, showed that each barrel contained about 3.5–4 in (8.9–10.2 cm) of gunpowder, 6 to ...