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Kingston Valve
A Kingston valve is a type of valve fitted in the bottom of a ship's plating that connects the sea to the ship's piping and storage tanks. A Kingston valve is a type of seacock. It is arranged so that, under normal operating conditions, sea pressure keeps the valve closed. When opened from the ship's interior, the Kingston valve allows sea water to enter the tank. The mechanism was introduced in 1837 by John Kingston (1786–1847), an English engineer after whom it is named. Surface ships On surface ships, Kingston valves are fitted on ship systems such as fuel tanks, water tanks, and ballast tanks. The valve allows sea water to enter the tank. For fuel tanks, the purpose was cleaning the tanks. On water tanks, the Kingston valve gave ship engineers the ability to blow out increasingly salty water from the system, by safely and easily operating the valve from the interior of the ship. Sea water was used in the ship's steam-powered propulsion system, with water being injected ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argonaute FS S636 P1040826
The Argonaute protein family, first discovered for its evolutionarily conserved stem cell function, plays a central role in RNA silencing processes as essential components of the RNA-induced silencing complex (RISC). RISC is responsible for the gene silencing phenomenon known as RNA interference (RNAi). Argonaute proteins bind different classes of small non-coding RNAs, including microRNAs (miRNAs), small interfering RNAs (siRNAs) and Piwi-interacting RNAs (piRNAs). Small RNAs guide Argonaute proteins to their specific targets through sequence complementarity (base pairing), which then leads to mRNA cleavage, translation inhibition, and/or the initiation of mRNA decay. The name of this protein family is derived from a mutant phenotype resulting from mutation of AGO1 in '' Arabidopsis thaliana'', which was likened by Bohmert et al. to the appearance of the pelagic octopus '' Argonauta argo''. RNA interference RNA interference (RNAi) is a biological process in which the RNA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vent (submarine)
In submarine technology a vent is a valve fitted to the top of a submarine's ballast tanks to let air escape from the top of the ballast tank and be replaced by water entering through the opening(s) called "flood ports" or "floods" at the bottom of the tank. In earlier times, the openings at the bottom of the ballast tank were fitted with valves known as Kingston valves. These valves were eliminated in the U.S. Navy between the World Wars. When on the surface a submarine's ballast tanks are filled with air which gives the vessel its buoyancy and in order for the submarine to submerge water is taken into the ballast tanks through the flood ports at the bottom of the tanks, effacing this excess buoyancy. As the ballast tanks contain air when on the surface it is necessary to allow this air to escape, so that water may then enter the tanks, and this air is allowed to escape via the opened vents in the top of the ballast tanks. The vents which are used to allow water to enter th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watercraft Components
Any vehicle used in or on water as well as underwater, including boats, ships, hovercraft and submarines, is a watercraft, also known as a water vessel or waterborne vessel. A watercraft usually has a propulsive capability (whether by sail, oar, paddle, or engine) and hence is distinct from a stationary device, such as a Floating dock (jetty), pontoon, that merely Buoyancy, floats. Types Most watercraft may be described as either a ship or a boat. However, numerous items, including surfboards, robot, underwater robots, seaplanes and torpedoes, may be considered neither ships nor boats. Although ships are typically larger than boats, the distinction between those two categories is not one of size per se. *Ships are typically large ocean-going vessels; whereas boats are smaller, and typically travel most often on inland or coastal waters. *A rule of thumb says "a boat can fit on a ship, but a ship can't fit on a boat", and a ship ''usually'' has sufficient size to carry its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plumbing Valves
Plumbing is any system that conveys fluids for a wide range of applications. Plumbing uses pipes, valves, plumbing fixtures, tanks, and other apparatuses to convey fluids. Heating and cooling (HVAC), waste removal, and potable water delivery are among the most common uses for plumbing, but it is not limited to these applications. The word derives from the Latin for lead, ''plumbum'', as the first effective pipes used in the Roman era were lead pipes. In the developed world, plumbing infrastructure is critical to public health and sanitation. Boilermakers and pipefitters are not plumbers although they work with piping as part of their trade and their work can include some plumbing. History Plumbing originated during ancient civilizations, as they developed public baths and needed to provide potable water and wastewater removal for larger numbers of people. The Mesopotamians introduced the world to clay sewer pipes around 4000 BCE, with the earliest examples found in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century Inventions
The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. It was also marked by the collapse of the large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Battle Of Guadalcanal
The Naval Battle of Guadalcanal, sometimes referred to as the Third and Fourth Battles of Savo Island, the Battle of the Solomons, the Battle of Friday the 13th, or, in Japanese sources, the , took place from 12 to 15 November 1942, and was the decisive engagement in a series of naval battles between Allied (primarily American) and Imperial Japanese forces during the months-long Guadalcanal Campaign in the Solomon Islands during World War II. The action consisted of combined air and sea engagements over four days, most near Guadalcanal and all related to a Japanese effort to reinforce land forces on the island. The only two U.S. Navy admirals to be killed in a surface engagement in the war were lost in this battle. Allied forces landed on Guadalcanal on 7 August 1942 and seized an airfield, later called Henderson Field, that was under construction by the Japanese military. There were several subsequent attempts to recapture the airfield by the Imperial Japanese Army and Nav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Battleship Kirishima
was a warship of the Imperial Japanese Navy during World War I and World War II. Designed by British naval engineer George Thurston, she was the third launched of the four s. Laid down in 1912 at the Mitsubishi, Mitsubishi Shipyards in Nagasaki, Nagasaki, Nagasaki, ''Kirishima'' was formally ship commissioning, commissioned in 1915 on the same day as her sister ship, . ''Kirishima'' patrolled on occasion off the Chinese coast during World War I, and helped with rescue efforts following the 1923 Great Kantō earthquake. Starting in 1927, ''Kirishima''s first reconstruction rebuilt her as a battleship, strengthening her armor and improving her speed. From 1934, a second reconstruction completely rebuilt her superstructure, upgraded her engine plant, and equipped her with Aircraft catapult, launch catapults for floatplanes. Now fast enough to accompany Japan's growing aircraft carrier, carrier fleet, she was reclassified as a fast battleship. During the Second Sino-Japanese War, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial Japanese Navy
The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender in World War II. The Japan Maritime Self-Defense Force (JMSDF) was formed between 1952–1954 after the dissolution of the IJN. The Imperial Japanese Navy was the third largest navy in the world by 1920, behind the Royal Navy and the United States Navy (USN). It was supported by the Imperial Japanese Navy Air Service for aircraft and airstrike operation from the fleet. It was the primary opponent of the Western Allies in the Pacific War. The origins of the Imperial Japanese Navy go back to early interactions with nations on the Asian continent, beginning in the early medieval period and reaching a peak of activity during the 16th and 17th centuries at a time of cultural exchange with European powers during the Age of Discovery. After t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Aircraft Carrier Graf Zeppelin
The German aircraft carrier ''Graf Zeppelin'' was the lead ship in a class of two carriers of the same name ordered by the ''Kriegsmarine'' of Nazi Germany. She was the only aircraft carrier launched by Germany and represented part of the ''Kriegsmarine''s attempt to create a well-balanced oceangoing fleet, capable of projecting German naval power far beyond the narrow confines of the Baltic and North Seas. The carrier would have had a complement of 42 fighters and dive bombers. Construction on ''Graf Zeppelin'' began on 28 December 1936, when her keel was laid down at the Deutsche Werke shipyard in Kiel. Named in honor of ''Graf'' (Count) Ferdinand von Zeppelin, the ship was launched on 8 December 1938, and was 85% complete by the outbreak of World War II in September 1939. ''Graf Zeppelin'' was not completed and was never operational due to shifting construction priorities necessitated by the war. She remained in the Baltic for the duration of the war; with Germany's defeat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scuttling Of The German Fleet In Scapa Flow
Shortly after the end of the First World War, the German Kaiserliche Marine was scuttled by its sailors while held off the harbor of the British Royal Navy base at Scapa Flow, in the Orkney Islands of Scotland. The High Seas Fleet was interned there under the terms of the Armistice while negotiations took place over the fate of the ships. Fearing that either the UK would seize the ships unilaterally or the German government at the time might reject the Treaty of Versailles and resume the war effort (in which case the ships could be used against Germany), Admiral Ludwig von Reuter decided to scuttle the fleet. The scuttling was carried out on 21 June 1919. Intervening British guard ships were able to beach some of the ships, but 52 of the 74 interned vessels sank. Many of the wrecks were salvaged over the next two decades and were towed away for scrapping. Those that remain are popular diving sites. The ships are a source of low-background steel. Background The signing o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Battleship Potemkin
The Russian battleship ''Potemkin'' (russian: Князь Потёмкин Таврический, translit=''Kniaz Potyomkin Tavricheskiy'', links=no, "Prince Potemkin of Taurida") was a pre-dreadnought battleship built for the Imperial Russian Navy's Black Sea Fleet. She became famous when the crew rebelled against the officers in June 1905 (during that year's revolution), which is now viewed as a first step towards the Russian Revolution of 1917. The mutiny later formed the basis of Sergei Eisenstein's 1925 silent film ''Battleship Potemkin''. After the mutineers sought asylum in Constanța, Romania, and after the Russians recovered the ship, her name was changed to ''Panteleimon''. She accidentally sank a Russian submarine in 1909 and was badly damaged when she ran aground in 1911. During World War I, ''Panteleimon'' participated in the Battle of Cape Sarych in late 1914. She covered several bombardments of the Bosphorus fortifications in early 1915, including one where ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Battleship Sevastopol (1895)
''Sevastopol'' (russian: Севастополь) was the last of three ships in the of pre-dreadnought battleships built for the Imperial Russian Navy in the 1890s. Named for the siege of Sevastopol during the Crimean War, the ship was commissioned into the First Pacific Squadron of the Russian Pacific Fleet and was stationed at Port Arthur (today Lüshunkou District, Dalian, Liaoning, China), a Russian naval base acquired from China in 1898 as part of the Kwantung Leased Territory. One of the first ships to use Harvey nickel-steel armor and Popov radios, she displaced at full load and was long overall, and mounted a main battery of four guns in two twin turrets. She was laid down in May 1892, launched on 1 June 1895 and completed in 1899. Her sea trials lasted until 1900. ''Sevastopol'' saw service in the Russo-Japanese War of 1904–1905. Slightly damaged during a surprise attack on Port Arthur in early February, the ship later participated in several attempts to br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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