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Patent Slip
A patent slip or marine railway is an inclined plane extending from shoreline into water, featuring a "cradle" onto which a ship is first floated, and a mechanism to haul the ship, attached to the cradle, out of the water onto a slip. The marine railway was invented by a Scot, Thomas Morton, in the early 19th century, as a cheaper alternative to dry docks for marine vessel repairs, in particular below waterline. Larger modern marine railways can handle vessels of thousands of tons. History Invented by shipwright Thomas Morton in 1818, the marine railway offered an alternative to the expensive and time-consuming process of dry docking a ship to perform maintenance or repairs to its hull below waterline. The means and mechanisms over time became various, but always include a "cradle" onto which the ship is floated, and a mechanical mechanism for transferring the ship from water to land up an incline. The destination where work was performed was termed the slip. Thomas Morton p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Chute Acansino
Big or BIG may refer to: * Big, of great size or degree Film and television * Big (film), ''Big'' (film), a 1988 fantasy-comedy film starring Tom Hanks * ''Big'', a 2023 Taiwanese children's film starring Van Fan and Chie Tanaka * ''Big!'', a Discovery Channel television show * ''Richard Hammond's Big'', a television show presented by Richard Hammond * Big (TV series), ''Big'' (TV series), a 2012 South Korean TV series * Big (My Hero), "Big" (''My Hero''), a 2003 television episode * ''Banana Island Ghost'', a 2017 fantasy action comedy film Music * ''Big: the musical'', a 1996 musical based on the film * Big Records, a record label * Big! (Betty Who album), ''Big!'' (Betty Who album) * Big (album), ''Big'' (album), a 2007 album by Macy Gray * Big (Brassmunk song), "Big" (Brassmunk song) * Big (Dead Letter Circus song), "Big" (Dead Letter Circus song) * Big (Fontaines D.C. song), "Big" (Fontaines D.C. song) * Big (Juice Wrld song), "Big" (Juice Wrld song) * Big (Sneaky Sound Sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Block And Tackle
A block and tackle or only tackle is a system of two or more pulleys with a rope or cable threaded between them, used to provide tension and lift heavy loads. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load. The rope is threaded through the pulleys to provide mechanical advantage that amplifies the force applied to the rope. Hero of Alexandria described cranes formed from assemblies of pulleys in the first century. Illustrated versions of Hero's ''Mechanica'' (a book on raising heavy weights) show early block and tackle systems. Overview A block is a set of pulleys or sheaves mounted on a single frame. An assembly of blocks with a rope threaded through the pulleys is called tackle. The process of threading ropes or cables through blocks is called "reeving", and a threaded block and tackle is said to have been "rove". A block and tackle system amplifies the tension force in the rope to lift heavy loads ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shipbuilding
Shipbuilding is the construction of ships and other Watercraft, floating vessels. In modern times, it normally takes place in a specialized facility known as a shipyard. Shipbuilders, also called shipwrights, follow a specialized occupation that traces its roots to before recorded history. Until recently, with the development of complex non-maritime technologies, a ship has often represented the most advanced structure that the society building it could produce. Some key industrial advances were developed to support shipbuilding, for instance the sawing of timbers by Saw#Mechanically powered saws, mechanical saws propelled by windmills in Dutch shipyards during the first half of the 17th century. The design process saw the early adoption of the logarithm (invented in 1615) to generate the curves used to produce the shape of a hull (watercraft), hull, especially when scaling up these curves accurately in the mould Lofting, loft. Shipbuilding and ship repairs, both commercial an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictionary Of National Biography
The ''Dictionary of National Biography'' (''DNB'') is a standard work of reference on notable figures from British history, published since 1885. The updated ''Oxford Dictionary of National Biography'' (''ODNB'') was published on 23 September 2004 in 60 volumes and online, with 50,113 biographical articles covering 54,922 lives. First series Hoping to emulate national biographical collections published elsewhere in Europe, such as the (1875), in 1882 the publisher George Smith (1824–1901), of Smith, Elder & Co., planned a universal dictionary that would include biographical entries on individuals from world history. He approached Leslie Stephen, then editor of the '' Cornhill Magazine'', owned by Smith, to become the editor. Stephen persuaded Smith that the work should focus only on subjects from the United Kingdom and its present and former colonies. An early working title was the ''Biographia Britannica'', the name of an earlier eighteenth-century reference work. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evans Bay Patent Slip
The Evans Bay Patent Slip is a heritage site of the former patent slip located in Evans Bay, in Wellington Harbour in the North Island of New Zealand. The first slipway on the site was commissioned in May 1863 to enable maintenance of the hulls of small vessels. The Wellington Provincial Council was keen to encourage shipping trade by improving facilities in Wellington Harbour and began planning later in 1863 for the construction of a larger patent slip. A concession was granted for the supply, construction and operation of a patent slip on the site. Equipment for the new slip was delivered in 1865 and 1866, but construction was delayed for several years because of a contractual dispute concerning the suitability of the design for the ground conditions. The original suppliers lost a court case and withdrew from the project. The Wellington Patent Slip Company was formed to take over the assets, and construction began in 1871. The Patent Slip was officially opened in March 1873. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caribbean
The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America to the west, and South America to the south, it comprises numerous List of Caribbean islands, islands, cays, islets, reefs, and banks. It includes the Lucayan Archipelago, Greater Antilles, and Lesser Antilles of the West Indies; the Quintana Roo Municipalities of Quintana Roo#Municipalities, islands and Districts of Belize#List, Belizean List of islands of Belize, islands of the Yucatán Peninsula; and the Bay Islands Department#Islands, Bay Islands, Miskito Cays, Archipelago of San Andrés, Providencia and Santa Catalina, Archipelago of San Andrés, Providencia, and Santa Catalina, Corn Islands, and San Blas Islands of Central America. It also includes the coastal areas on the Mainland, continental mainland of the Americas bordering the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hassel Island
Hassel Island (also sometimes Hassell Island) is a small island of the U.S. Virgin Islands, a United States territory located in the Caribbean Sea. Hassel Island lies in the Charlotte Amalie Harbor just south of Saint Thomas and east of Water Island, with which it is part of the sub-district of Water Island. The roughly island was once a peninsula of Saint Thomas, known as Orkanhullet (Hurricane Hole). Hassel Island was separated by the Danish government in 1860, and named for the Hassel family who owned much of the estate. In March 2012, the MTV's reality TV series ''The Real World'' was filmed for its twenty-seventh season on Hassel Island. The series was filmed at the Royal Mail Building which was the former quarters of the Royal Mail Steam Packet Company. During the later 1900s it was operated as the Royal Mail Inn. It is the only season that the television series has filmed in the Caribbean. The season completed its filming two months later in May 2012. In 2015, that la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Creque Marine Railway
The Creque Marine Railway, formerly the "St Thomas Marine Repair Facility", is an inclined-plane ship railway on Hassel Island, in the bay of Charlotte Amalie off the coast of St. Thomas Island, in the U.S. Virgin Islands. Its site is below Fort Shipley, within Virgin Islands National Park. History 19th century The marine railway was constructed in the 1840s by Danish investors, at Little Careening Cove on Hassel Island in the colonial Danish West Indies. It entered commercial service in 1844. It is probably the world's oldest surviving marine railway. A large ship-cradle, built out of "greenheart" wood, ran on four rails, down a shallow incline into the water; the cradle was ballasted. A ship could be floated into the cradle, then drawn up the railway by a winch so that work could be done on the hull - or propellers - of the ship on dry land. The winch was driven by a beam engine. The beam engine and winch mechanism were manufactured by Boulton of Hamburg, around 1840. 20th c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Chute Marine Railway
Big Chute Marine Railway is a patent slip at lock 44 (in the township of Georgian Bay, Ontario, Georgian Bay) of the Trent-Severn Waterway in Ontario, Canada. It works on an inclined plane to carry boats in individual cradles over a change of height of about . It is the only marine railway (or canal inclined plane) of its kind in North America still in use, and is overseen by federally operated Parks Canada. This railway is vital for those cruising the Great Loop route. History In 1914, contracts were let to have 3 locks built to connect the Severn River to Georgian Bay at Port Severn, Big Chute, and Swift Rapids. With the start of World War I, however, there was a shortage of manpower and resources. Lock 45 at Port Severn was nearing completion, so it was finished as a small, "temporary" lock. (It remains in use to this day.) The locks at Big Chute and Swift Rapids were not completed, with "temporary" marine railways being built instead. The original Big Chute Marine Rai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock (water Navigation)
A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a chamber in a permanently fixed position in which the water level can be varied. (In a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson (engineering), caisson) that rises and falls.) Locks are used to make a river more easily navigable, or to allow a canal to cross land that is not level. Over time, more and larger locks have been used in canals to allow a more direct route to be taken. History Ancient Egypt In Ancient Egypt, the river-locks was probably part of the Canal of the Pharaohs: Ptolemy II is credited by some for being the first to solve the problem of keeping the Nile free of salt water when his engineers invented the lock around 274/273 BC. Ancient China During 960–1279 CE, the natural extension o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cathodic Protection
Cathodic protection (CP; ) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. A simple method of protection connects the metal to be protected to a more easily corroded " sacrificial metal" to act as the anode. The sacrificial metal then corrodes instead of the protected metal. For structures such as long pipelines, where passive galvanic cathodic protection is not adequate, an external DC electrical power source is used to provide sufficient current. Cathodic protection systems protect a wide range of metallic structures in various environments. Common applications are: steel water or fuel pipelines and steel storage tanks such as home water heaters; steel pier piles; ship and boat hulls; offshore oil platforms and onshore oil well casings; offshore wind farm foundations and metal reinforcement bars in concrete buildings and structures. Another common application is in galvanized steel, in which a sacrif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air. The blades are shaped so that their rotational motion through the fluid causes a pressure difference between the two surfaces of the blade by Bernoulli's principle which exerts force on the fluid. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft (ship), propeller shaft with an approximately horizontal axis. History Early developments The principle employed in using a screw propeller is derived from stern sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the blade to the wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
