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Blish Lock
The Blish lock is a breech locking mechanism designed by John Bell Blish based upon his assumption that under extreme pressures, certain dissimilar metals would resist movement with a force greater than friction laws would predict. In modern engineering terminology, it is an extreme manifestation of what is now called static friction, or ''stiction''. His locking mechanism was used first in the Thompson submachine gun. Nowadays it is discredited as a useful firearm operating principle, due to its almost nonexistent effects on the operation and functioning of a firearm; because of that, firearms which theoretically employed it operate not by the supposed ''Blish lock'' principle, but, in fact, by blowback operation. Invention The Blish lock resulted from John Blish's observation of large naval guns. He noticed that the breech blocks of naval guns with interrupted thread breeches remained closed when fired with full charges, but tended to unscrew when fired with light charges. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blish Patent
James Benjamin Blish () was an American science fiction and fantasy writer. He is best known for his ''Cities in Flight'' novels and his series of ''Star Trek'' novelizations written with his wife, J. A. Lawrence. His novel ''A Case of Conscience'' won the Hugo Award. He is credited with creating the term "gas giant" to refer to large planetary bodies. Blish was a member of the Futurians. His first published stories appeared in ''Super Science Stories'' and ''Amazing Stories''. Blish wrote literary criticism of science fiction using the pen name William Atheling Jr. His other pen names included Donald Laverty, John MacDougal, and Arthur Lloyd Merlyn. Life Blish was born on May 23, 1921, at East Orange, New Jersey. While in high school, Blish self-published a fanzine, called ''The Planeteer'', using a hectograph. The fanzine ran for six issues. Blish attended meetings of the Futurian Science Fiction Society in New York City during this period. Futurian members Damon Kni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thompson 21 And Rifle
Thompson may refer to: People * Thompson (surname) * Thompson M. Scoon (1888–1953), New York politician Places Australia * Thompson Beach, South Australia, a locality Bulgaria * Thompson, Bulgaria, a village in Sofia Province Canada * Thompson, Manitoba * Thompson (electoral district), an electoral district in the above location * Rural Municipality of Thompson, Manitoba * Thompson River, a river in British Columbia ** Thompson Country, a region within the basin of the Thompson River ** Thompson Plateau, a landform in the Interior of British Columbia named for the Thompson River ** Thompson-Nicola Regional District, a regional district in British Columbia * Thompson Sound (British Columbia), a sound in the area of the Broughton Archipelago * Thompson Sound, British Columbia, an unincorporated locality at Thompson Sound * Thompson Station, Nova Scotia England * Thompson, Norfolk New Zealand * Thompson Sound (New Zealand), one of the indentations in the coas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breech-loading Weapon
A breechloader is a firearm in which the user loads the ammunition (cartridge or shell) via the rear (breech) end of its barrel, as opposed to a muzzleloader, which loads ammunition via the front ( muzzle). Modern firearms are generally breech-loading – except for replicas of vintage weapons. Early firearms before the mid-19th century were almost entirely muzzle-loading. Mortars and the Russian GP-25 grenade launcher are the only muzzleloaders remaining in frequent modern usage. However, referring to a weapon specifically as breech loading is mostly limited to single-shot or otherwise non-repeating firearms, such as double-barreled shotguns. Breech-loading provides the advantage of reduced reloading time, because it is far quicker to load the projectile and propellant into the chamber of a gun/cannon than to reach all the way over to the front end to load ammunition and then push them back down a long tube – especially when the projectile fits tightly and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Bell Blish
John Bell Blish (September 8, 1860 – December 22, 1921) was an American inventor known primarily for developing the Blish lock, used in the Thompson submachine gun, more commonly known as the "Tommy Gun." Blish licensed the patent for his lock to the Auto-Ordnance Corporation in 1915 in return for company stock. Blish was a career United States naval officer, serving as executive officer on the U.S. warships ''Niagara'' and ''Vicksburg'' (PG-11) during the Spanish–American War. He retired from the United States Navy with the rank of Commander in 1919. Blish was buried at Arlington National Cemetery. Namesake The USS ''John Blish'', a survey ship commissioned during World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ..., was named after him. External links''Dictionary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stiction
Stiction is the static friction that needs to be overcome to enable relative motion of stationary objects in contact. The term is a portmanteau of the words ''static'' and ''friction'', and is perhaps also influenced by the verb '' to stick''. Any solid objects pressing against each other (but not sliding) will require some threshold of force parallel to the surface of contact in order to overcome static adhesion. Stiction is a ''threshold'', not a continuous force. However, stiction might also be an illusion made by the rotation of kinetic friction. In situations where two surfaces with areas below the micrometer scale come into close proximity (as in an accelerometer), they may adhere together. At this scale, electrostatic and/or Van der Waals and hydrogen bonding forces become significant. The phenomenon of two such surfaces being adhered together in this manner is also called stiction. Stiction may be related to hydrogen bonding or residual contamination. Automobiles Sticti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thompson Submachine Gun
The Thompson submachine gun (also known as the "Tommy Gun", "Chicago Typewriter", "Chicago Piano", “Trench Sweeper” or "Trench Broom") is a blowback-operated, air-cooled, magazine-fed selective-fire submachine gun, invented by United States Army Brigadier general John T. Thompson in 1918. It was originally designed to break the stalemate of trench warfare of World War I, but was not finished until after the war ended. The Thompson saw early use by the United States Marine Corps during the Banana Wars, the United States Postal Inspection Service, the Irish Republican Army, the Republic of China, and the FBI (following the Kansas City Massacre). The weapon was also sold to the general public. Because it could be obtained so easily, the Thompson became notorious during the Prohibition era as the signature weapon of various organized crime syndicates in the United States in the 1920s. It was a common sight in the media at the time, and was used by both law enforcement office ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blowback (firearms)
Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gas created by the ignition of the propellant charge. Several blowback systems exist within this broad principle of operation, each distinguished by the methods used to control bolt movement. In most actions that use blowback operation, the breech is not locked mechanically at the time of firing: the inertia of the bolt and recoil , relative to the weight of the bullet, delay opening of the breech until the bullet has left the barrel. A few locked breech designs use a form of blowback (example: primer actuation) to perform the unlocking function. The blowback principle may be considered a simplified form of gas operation, since the cartridge case behaves like a piston driven by the powder gases. Other operating principles for self-loading firearms include delayed blowback, blow forward, gas operation, and recoil operation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interrupted Screw
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 of artillery guns. It is believed to have been invented in 1845. The system has also been used to close other applications, 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 screw, 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 to achieve full closure depends on the number of unthread ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blowback (arms)
Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gas created by the ignition of the propellant charge. Several blowback systems exist within this broad principle of operation, each distinguished by the methods used to control bolt movement. In most actions that use blowback operation, the breech is not locked mechanically at the time of firing: the inertia of the bolt and recoil , relative to the weight of the bullet, delay opening of the breech until the bullet has left the barrel. A few locked breech designs use a form of blowback (example: primer actuation) to perform the unlocking function. The blowback principle may be considered a simplified form of gas operation, since the cartridge case behaves like a piston driven by the powder gases. Other operating principles for self-loading firearms include delayed blowback, blow forward, gas operation, and recoil operatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
45 ACP
The .45 ACP (Automatic Colt Pistol) or .45 Auto (11.43×23mm) is a rimless straight-walled handgun cartridge designed by John Moses Browning in 1904, for use in his prototype Colt semi-automatic pistol. After successful military trials, it was adopted as the standard chambering for Colt's M1911 pistol. The round was developed due to a lack of stopping power experienced in the Moro Rebellion in places like Sulu. The issued ammunition, .38 Long Colt, had proved inadequate, motivating the search for a better cartridge. This experience and the Thompson–LaGarde Tests of 1904 led the Army and the Cavalry to decide that a minimum of .45 caliber was required in a new handgun. The standard issue military .45 ACP round uses a 230-grain (14.9 g) round nose projectile that travels at approximately 830 feet per second (250 m/s) when fired from a government-issue M1911A1 pistol. It operates at a relatively low maximum chamber pressure rating of , compared to for both 9mm Parab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
45 Remington–Thompson
45 may refer to: * 45 (number) * one of the years 45 BC, AD 45, 1945, 2045 Film * ''45'' (film), directed by Peter Coster (2009) * ''.45'' (film), directed by Gary Lennon (2006) Music * ''45'' (Jaguares album), 2008 * ''45'' (Kino album), 1982 * "45" (Bon Iver song), 2016 * "45" (The Gaslight Anthem song), 2012 * "45" (Shinedown song), 2003 * "45" (Elvis Costello song), 2002 *"Forty Five", a song by Karma to Burn from the album '' Appalachian Incantation'', 2010 *45 rpm record or 45, a common form of vinyl single Other uses *Donald Trump, the 45th President of the United States, with the nickname "45" * ''45'' (book), written by Bill Drummond *.45 caliber, a family of firearm cartridges ** A nickname for a handgun chambered in .45 caliber, such as the M1911 pistol or Colt Single Action Army **.45 ACP, pistol cartridge **.45 Colt, revolver cartridge *Jacobite rising of 1745 or "The '45", in the United Kingdom *Forty-fives Forty-fives (also known as Auction Forty-Fives, Auction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
