Abstract: A high-strength ceramic laminated tube comprising an inner tube of ceramic material and at least one outer tube of a metal or ceramic material shrunken onto the inner tube is provided, e.g., a ceramic tube capable of withstanding the mechanical stresses which occur in, e.g., a gun barrel, or in a bearing subjected to great stress.

Abstract: In order to use cases for firearms of various materials such: aluminum, (which is inexpensive), brass, iron and to facilitate use of greater pressure while insuring reliable operation of the gun, this invention proposes the use of divided holders fixed in the chamber (dies which are adjustable). These holders, after discharge of the cartridge, move back along with the case and the bolt, a very short distance, spread out, loosening the case. The case moves farther along with the bolt, and is ejected in regular manner. The bolt introduces the next cartridge into the chamber, etc.

Abstract: To increase the strength, rigidity and accuracy of a rifle gun barrel, a multi-part composite rifle barrel is created by enclosing the inner rifled tube with an outer sleeve, the two fastened together in a way that introduces compression in the outer part and tension in the inner part. The tension in the inner part increases the barrel's rigidity and reduces its vibration, thus increasing the accuracy of the rifle.

Abstract: A coned joint for the purpose of structurally joining two filament wound bes, having dissimilar diameters, into a single launch tube. After being joined together, the assembled tubes have a straightness equal to or better than a comparable rolled or fabricated metal tube in addition to being lighter and less costly to produce.

Abstract: Filament/epoxy camouflage launch tubes in which the launch tubes are fabrted using conventional filament winding processes and materials and in which each tube is bonded together with an epoxy resin system in which the epoxy resin system includes coloring agents for coloring the launch tubes in a camouflage color that colors the launch tube through and through. The exact color of the launch tube can be varied by varying the amount of the coloring agent.

Abstract: A machine gun barrel for firing blanks comprising a reclaimed quick discoct barrel with a one piece blank firing attachment with diminished orifice replacing the flash suppressor and threadedly mounted over the barrel end provides gas build-up necessary for gun operation without leakage. Accidental live round firing causes forward, not lateral, fragmentation of the attachment because of its conical bore configuration.

Abstract: Existence of cracks through the liner of a gun barrel is determined by sizing the outer tube of the barrel to expand and jam in the recoil jacket in response to pressure between the liner and the tube; or by providing electrical conductors between the tube and the liner which change their electrical characteristics when cracks form; or by permitting powder gases to leak through small openings in the tube as an indication of failure; or by a combination of these methods.

Abstract: A composite extension rod for coupling a drilling tool and a hammer which is located outside of the drill hole and has a central tube surrounded by parallel high strength rods and an outer sheath which has coupling sleeves at its ends.

Abstract: In an automatic firearm, the cartridge chamber at the barrel end is assembled of two elements and the interface between them is gas pressure sealed. Each element has a different number of gas pressure balance grooves leaving a minimum of support surface for the cartridge with resulting minimum of resistance against pulling of the empty cartridge.