|
Interrupted Screw
file:Breech 122m10 hameenlinna 2.jpg, Breech from Russian 122 mm M1910 howitzer, modified and combined with 105 mm H37 howitzer barrel An interrupted screw or interrupted thread is a mechanical device typically used in the Breech-loading weapon, breech of artillery guns. It is believed to have been invented in 1845. The system has also been used to close other devices, including the joint between helmet (bonnet) and breastplate (corselet) of standard diving suit helmets, and the locks of diving chambers. Design An interrupted screw has a section of thread along its axis removed. The screw is mated with a partially threaded hole in the receptacle: threadless channels in the breechblock screw line up with the threaded parts of the receptacle, and vice versa. The screw can thus be smoothly inserted all the way into the receptacle, after which as little as one-eighth of a turn can engage the two sets of threads securely, sealing the joint. The amount of rotation required ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
|
|
Breech 122m10 Hameenlinna 2
Breech may refer to: * Breech (firearms), the opening at the rear of a gun barrel where the cartridge is inserted in a breech-loading weapon * breech, the lower part of a pulley block * breech, the penetration of a boiler where exhaust gases leave it * breech birth, when the baby is born feet or bottom first * breeches, an item of clothing covering the body from the waist down * buttocks, or breech, the lower part of the human abdomen People with the surname * Ernest R. Breech (1897–1978), American businessman, chairman of Ford Motor Company * Jim Breech (born 1956), American football player See also * * Breach (other) * Breeching (other) {{disambiguation, surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
|
|
Bureau Of Ordnance
The Bureau of Ordnance (BuOrd) was a United States Navy organization, which was responsible for the procurement, storage, and deployment of all naval weapons, between the years 1862 and 1959. History The Bureau of Ordnance was established as part of the Department of the Navy by an act of Congress, on July 5, 1862 (12 Stat. 510). The act split the Navy's existing Bureau of Ordnance and Hydrography (1842–1862) into two entities by transferring hydrographic functions into the newly established Bureau of Navigation. During the early 20th century, BuOrd became involved in the development of aerial weapons. This often led to friction with the Bureau of Aeronautics (BuAer), which had responsibility for the development of Naval aircraft. BuAer's work on "pilotless aircraft," or drones, conflicted with BuOrd's development of guided missiles. After World War II, the Navy examined ways to improve coordination between the two bureaus; ultimately, the decision was made to merge the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
|
 |
Cartridge (firearms)
A cartridge, also known as a round, is a type of pre-assembled firearm ammunition packaging a projectile ( bullet, shot, or slug), a propellant substance ( smokeless powder, black powder substitute, or black powder) and an ignition device ( primer) within a metallic, paper, or plastic case that is precisely made to fit within the barrel chamber of a breechloading gun, for convenient transportation and handling during shooting. Although in popular usage the term "bullet" is often used to refer to a complete cartridge, the correct usage only refers to the projectile. Military and commercial producers continue to pursue the goal of caseless ammunition. Some artillery ammunition uses the same cartridge concept as found in small arms. In other cases, the artillery shell is separate from the propellant charge. A cartridge without a projectile is called a '' blank''; one that is completely inert (contains no active primer and no propellant) is called a '' dummy''; one that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
 |
Shell (projectile)
A shell, in a modern military context, is a projectile whose payload contains an explosive, incendiary device, incendiary, or other chemical filling. Originally it was called a bombshell, but "shell" has come to be unambiguous in a military context. A shell can hold a tracer ammunition, tracer. All explosive- and incendiary-filled projectiles, particularly for mortar (weapon), mortars, were originally called ''grenades'', derived from the French language, French word for pomegranate, so called because of the similarity of shape and that the multi-seeded fruit resembles the powder-filled, fragmentizing bomb. Words cognate with ''grenade'' are still used for an artillery or mortar projectile in some European languages. Shells are usually large-caliber projectiles fired by artillery, armored fighting vehicle, armoured fighting vehicles (e.g. tanks, assault guns, and mortar carriers), warships, and autocannons. The shape is usually a cylinder (geometry), cylinder topped by an o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
 |
Radius
In classical geometry, a radius (: radii or radiuses) of a circle or sphere is any of the line segments from its Centre (geometry), center to its perimeter, and in more modern usage, it is also their length. The radius of a regular polygon is the line segment or distance from its center to any of its Vertex (geometry), vertices. The name comes from the Latin ''radius'', meaning ray but also the spoke of a chariot wheel.Definition of Radius at dictionary.reference.com. Accessed on 2009-08-08. The typical abbreviation and mathematical symbol for radius is ''R'' or ''r''. By extension, the diameter ''D'' is defined as twice the radius:Definition of radius at mathwords.com. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
|
Welin Breech Block
The Welin breech block was a revolutionary stepped, interrupted thread design for locking artillery breeches, invented by Axel Welin in 1889 or 1890. Shortly after, Vickers Vickers was a British engineering company that existed from 1828 until 1999. It was formed in Sheffield as a steel foundry by Edward Vickers and his father-in-law, and soon became famous for casting church bells. The company went public in 18 ... acquired the British patents. Welin breech blocks provide obturation for artillery pieces which use separate loading bagged charges and projectiles. In this system the projectile is loaded first and then followed by cloth bags of propellant. Design The breech block screw incorporates multiple threaded "steppings" of progressively larger radius and a gap step occupying each circular section. A three step breech block screw's circular area would nominally be divided into quarters, with each quarter containing three threaded sections of progressively incr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
|
 |
Axel Welin
Ernst Martin Axel Welin (10 November 1862 – 27 July 1951), was a Swedish inventor and industrialist. He was married to Agnes Welin from 1889. Axel Welin studied at the Royal Institute of Technology in Stockholm from 1879 to 1884. Between 1886 and 1888, Welin worked as a weapons designer for Thorsten Nordenfelt in London. In 1889 he started his own engineering firm, the Welin Davit & Engineering Company Ltd. He soon designed the famed ''Welin Breech''. However, his main interest was davits. He invented a new and improved davit for lowering boats on board ship, a quadrant davit for double-banked boats which simply became known as the Welin davit. The RMS ''Titanic'' was equipped with Welin davits,Michael Davie: "The Titanic. The Full Story of a Tragedy", Grafton Books, 1987, p. 103 and after the disaster the demand for his product skyrocketed. He was awarded the John Scott Medal of The Franklin Institute in 1911. He retired a wealthy man in 1932 and returned to Sweden. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
 |
De Bange
Charles Ragon de Bange (17 October 1833 – 9 July 1914) was a French artillery officer and Polytechnician. He invented the first effective obturator system for breech-loading artillery, which remains in use. He also designed a system of field guns of various calibers which served the French Army well into World War I: the ''Système de Bange''. Career De Bange breech obturator system Many attempts had been made at developing breech-loading cannons, but had only partial success sealing of the breech. When fired, hot gases and burning gunpowder could escape, losing power and potentially burning the operating crew. Rifles, with smaller loads and thus less stress, were able to use rubber in O-rings as on the Chassepot rifle. The same principle of breech sealing applied on cannons was not as easy to develop. Several materials were able to hold the pressure and heat of cannon fire, but did not expand like rubber, thereby failing to provide a tight seal. The most successful of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
 |
Dahlgren Gun
Dahlgren guns were muzzle-loading naval guns designed by a United States Navy Rear Admiral John A. Dahlgren (November 13, 1809 – July 12, 1870), mostly used in the American Civil War. Dahlgren's design philosophy evolved from an accidental explosion in 1849 of a gun being tested for accuracy, killing a gunner. He believed a safer, more powerful naval cannon could be designed using more scientific design criteria. Dahlgren guns were designed with a smooth curved shape, equalizing strain and concentrating more weight of metal in the gun breech where the greatest pressure of expanding propellant gases needed to be met to keep the gun from bursting. Because of their rounded contours, Dahlgren guns were nicknamed "soda bottles", a shape which became their most identifiable characteristic. Dahlgren boat howitzers During the Mexican–American War, the U.S. found itself lacking in light guns that could be fired from ships' boats and landed to be used as light artillery in suppo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
|
Charles Morris (naval Officer)
Charles Morris (July 26, 1784 – January 27, 1856) was an American naval officer whose service extended through the first half of the 19th century. Biography Morris was born in Woodstock, Connecticut on July 26, 1784. After being appointed a midshipman in July 1799, he served in the Quasi-War with France, First Barbary War, the Second Barbary War, and the War of 1812. He was promoted to captain in March 1813. He served as a Navy Commissioner from 1823 to 1827, and as the Chief of the Bureau of Construction, Equipment, and Repairs from 1844 to 1847. In 1812, Morris was appointed first lieutenant of under the command of Isaac Hull during her battle with , in which action Morris was severely wounded. He was promoted to captain on March 3, 1813. In 1814, he commanded in raiding expeditions against British commerce. Cornered in the Penobscot River in Maine by a British squadron under Captain Robert Barrie, Morris and his men went ashore with their cannons and, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
|
 |
United States Navy
The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 million tons in 2021. It has the world's largest aircraft carrier fleet, with List of aircraft carriers in service, eleven in service, one undergoing trials, two new carriers under construction, and six other carriers planned as of 2024. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the U.S. Navy is the third largest of the United States military service branches in terms of personnel. It has 299 deployable combat vessels and about 4,012 operational aircraft as of 18 July 2023. The U.S. Navy is one of six United States Armed Forces, armed forces of the United States and one of eight uniformed services of the United States. The United States Navy traces its origins to the Continental Navy, which was established during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
 |
Breech-loading Weapon
A breechloader is a firearm in which the user loads the ammunition from the breech end of the barrel (i.e., from the rearward, open end of the gun's barrel), as opposed to a muzzleloader, in which the user loads the ammunition from the ( muzzle) end of the barrel. The vast majority of modern firearms are generally breech-loaders, while firearms made before the mid-19th century were mostly smoothbore muzzle-loaders. Only a few muzzleloading weapons, such as mortars, rifle grenades, some rocket launchers, such as the Panzerfaust 3 and RPG-7, and the GP series grenade launchers, have remained in common usage in modern military conflicts. However, referring to a weapon explicitly as breech-loading is mostly limited to weapons where the operator loads ammunition by hand (and not by operating a mechanism such as a bolt-action), such as artillery pieces or break-action small arms. Breech-loading provides the advantage of reduced reloading time because it is far quicker to load t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |