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Caisson Lock
The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats through large height differences. Such locks, each of which would only raise and lower boats through small height differences of a few feet, would not suffice when large height differences had to be tackled nor when water was in short supply. The caisson (or ) was thought to be one solution, although it transpired that the technology of the day was not capable of achieving this type of construction economically. It was designed primarily as a water-saving measure, and also was an attempt to minimise construction costs compared with other engineering solutions of the time. In use it was capable of replacing up to seven conventional locks. Othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caisson Lockenglish
{{disambiguation ...
Caisson (French for "box") may refer to: * Caisson (Asian architecture), a spider web ceiling * Caisson (engineering), a sealed underwater structure * Caisson (lock gate), a gate for a dock or lock, constructed as a floating caisson * Caisson (pen name), of Edward Sperling * Caisson (western architecture), a type of coffer * Caisson disease, or decompression sickness * Caisson lock, a type of canal lock * Deep foundation, also called a caisson foundation * Limbers and caissons, a two-wheeled cart for carrying ammunition, also used in certain state and military funerals See also * Kazon, a fictional alien race in ''Star Trek'' * Khe Sanh Khe Sanh is the district capital of Hướng Hoá District, Quảng Trị Province, Vietnam, located 63 km west of Đông Hà. During the Vietnam War, the Khe Sanh Combat Base was located to the north of the city. The Battle of Khe San ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boulton & Watt
Boulton & Watt was an early British engineering and manufacturing firm in the business of designing and making marine and stationary steam engines. Founded in the English West Midlands around Birmingham in 1775 as a partnership between the English manufacturer Matthew Boulton and the Scottish engineer James Watt, the firm had a major role in the Industrial Revolution and grew to be a major producer of steam engines in the 19th century. The engine partnership The partnership was formed in 1775 to exploit Watt's patent for a steam engine with a separate condenser. This made much more efficient use of its fuel than the older Newcomen engine. Initially the business was based at the Soho Manufactory near Boulton's Soho House on the southern edge of the then-rural parish of Handsworth. However most of the components for their engines were made by others, for example the cylinders by John Wilkinson. In 1795, they began to make steam engines themselves at their Soho Found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boat Lift
A boat lift, ship lift, or lift lock is a machine for transporting boats between water at two different elevations, and is an alternative to the canal lock. It may be vertically moving, like the Anderton boat lift in England, rotational, like the Falkirk Wheel in Scotland, or operate on an inclined plane, like the Ronquières inclined plane in Belgium. History A precursor to the canal boat lift, able to move full-sized canal boats, was the tub boat lift used in mining, able to raise and lower the 2.5 ton tub boats then in use. An experimental system was in use on the Churprinz mining canal in Halsbrücke near Dresden. It lifted boats using a moveable hoist rather than caissons. The lift operated between 1789 and 1868,Charles Hadfield ''World Canals: Inland Navigation Past and Present'', p. 71, and for a period of time after its opening engineer James Green reporting that five had been built between 1796 and 1830. He credited the invention to Dr James Anderson of Edinb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balance Lock
The balance lock was a type of boat lift designed by James Fussell (1748-1832) to transport boats up and down a hillside on a canal. An experimental balance lock was built as part of the Dorset and Somerset Canal and work was started for four more, but the project failed for financial reasons and they were not completed. History When the Dorset and Somerset Canal was authorised by an Act of Parliament in 1796, the builders were faced with the need for many locks, as the branch to Frome needed to accommodate a change in level of . James Fussell was a knowledgeable ironworker, and proposed the building of boat lifts to raise and lower the boats, rather than conventional locks. There had been some precursors, for John Duncombe had invented a counterbalanced lift in 1790, while working as the engineer on the Ellesmere Canal, and Robert Wheldon was proposing to use lifts on the nearby Somerset Coal Canal. From the documents which accompanied the bill when it was submitted to parliam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balance Lock
The balance lock was a type of boat lift designed by James Fussell (1748-1832) to transport boats up and down a hillside on a canal. An experimental balance lock was built as part of the Dorset and Somerset Canal and work was started for four more, but the project failed for financial reasons and they were not completed. History When the Dorset and Somerset Canal was authorised by an Act of Parliament in 1796, the builders were faced with the need for many locks, as the branch to Frome needed to accommodate a change in level of . James Fussell was a knowledgeable ironworker, and proposed the building of boat lifts to raise and lower the boats, rather than conventional locks. There had been some precursors, for John Duncombe had invented a counterbalanced lift in 1790, while working as the engineer on the Ellesmere Canal, and Robert Wheldon was proposing to use lifts on the nearby Somerset Coal Canal. From the documents which accompanied the bill when it was submitted to parliam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cutlery
Cutlery (also referred to as silverware, flatware, or tableware), includes any hand implement used in preparing, serving, and especially eating food in Western culture. A person who makes or sells cutlery is called a cutler. The city of Sheffield in England has been famous for the production of cutlery since the 17th century and a train – the ''Master Cutler'' – running from Sheffield to London was named after the industry. Bringing affordable cutlery to the masses, stainless steel was developed in Sheffield in the early 20th century. The major items of cutlery in Western culture are the knife, fork and spoon. These three implements first appeared together on tables in Britain in the Georgian era. In recent times, hybrid versions of cutlery have been made combining the functionality of different eating implements, including the spork (''sp''oon / f''ork''), spife (''sp''oon / kn''ife''), and knork (''kn''ife / f''ork''). The sporf or splade combines all three. Etym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Maudslay
Henry Maudslay ( pronunciation and spelling) (22 August 1771 – 14 February 1831) was an English machine tool innovator, tool and die maker, and inventor. He is considered a founding father of machine tool technology. His inventions were an important foundation for the Industrial Revolution. Maudslay's invention of a metal lathe to cut metal, circa 1800, enabled the manufacture of standard screw thread sizes. Standard screw thread sizes allowed interchangeable parts and the development of mass production. Early life Maudslay was the fifth of seven children of Henry Maudslay, a wheelwright in the Royal Engineers, and Margaret (''nee'' Whitaker), the young widow of Joseph Laundy. His father was wounded in action and so in 1756 became an 'artificer' at the Royal Arsenal, Woolwich (then in Kent), where he remained until 1776 and died in 1780. The family lived in an alley that no longer exists, off Beresford Square, between Powis Street and Beresford Street. Career ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stationary Steam Engine
Stationary steam engines are fixed steam engines used for pumping or driving mills and factories, and for power generation. They are distinct from Steam locomotive, locomotive engines used on Rail transport, railways, traction engines for heavy steam haulage on roads, steam cars (and other motor vehicles), agricultural engines used for ploughing or threshing, marine steam engine, marine engines, and the steam turbines used as the mechanism of power generation for most nuclear reactor#Electrical power generation, nuclear power plants. They were introduced during the 18th century and widely made for the whole of the 19th century and most of the first half of the 20th century, only declining as electricity supply and the internal combustion engine became more widespread. Types of stationary steam engine There are different patterns of stationary steam engines, distinguished by the layout of the Cylinder (engine), cylinders and crankshaft: *Beam engines have a rocking Beam (struct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enabling Act
An enabling act is a piece of legislation by which a legislative body grants an entity which depends on it (for authorization or legitimacy) the power to take certain actions. For example, enabling acts often establish government agencies to carry out specific government policies in a modern nation. The effects of enabling acts from different times and places vary widely. Germany The German word for an enabling act is ''Ermächtigungsgesetz''. It usually refers to the enabling act of 23 March 1933 which became a cornerstone of Adolf Hitler's seizure of power. Acts of 1914–1927 The first enabling act is dated from 4 August 1914 just after the German entry into World War I. With the vote of the Social Democratic Party, the Reichstag (the German Empire's parliament) agreed to give the government certain powers to take the necessary economic measures during the war. Such enabling acts were also common in other countries. The Reichstag had to be informed, and had the right to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Compressor
An air compressor is a pneumatic device that converts power (using an electric motor, diesel or gasoline engine, etc.) into potential energy stored in pressurized air (i.e., compressed air). By one of several methods, an air compressor forces more and more air into a storage tank, increasing the pressure. When the tank's pressure reaches its engineered upper limit, the air compressor shuts off. The compressed air, then, is held in the tank until called into use. The kinetic energy provided by the compressed air can be used for a variety of applications such as pneumatic tool as it is released air and the tank depressurizes. When tank pressure reaches its lower limit, the air compressor turns on again and re-pressurizes the tank. An air compressor must be differentiated from a pump because it works for any gas/air, while pumps work on a liquid. Classification Compressors may be classified according to the pressure delivered: # Low-pressure air compressors (LPACs), which have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rack-and-pinion
A rack and pinion is a type of linear actuator that comprises a circular gear (the ''pinion'') engaging a linear gear (the ''rack''). Together, they convert rotational motion into linear motion. Rotating the pinion causes the rack to be driven in a line. Conversely, moving the rack linearly will cause the pinion to rotate. A rack and pinion drive can use both straight and helical gears. Though some suggest helical gears are quieter in operation, no hard evidence supports this theory. Helical racks, while being more affordable, have proven to increase side torque on the datums, increasing operating temperature leading to premature wear. Straight racks require a lower driving force and offer increased torque and speed per percentage of gear ratio which allows lower operating temperature and lessens viscal friction and energy use. The maximum force that can be transmitted in a rack and pinion mechanism is determined by the tooth pitch and the size of the pinion as well as the gear r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sir William Congreve, 2nd Baronet
Sir William Congreve, 2nd Baronet KCH FRS (20 May 1772 – 16 May 1828) was an English soldier, publisher and inventor. He pioneered rocket artillery and was renowned for his development and deployment of Congreve rockets. He was also a Tory Member of Parliament (MP). Biography He was the eldest son of Rebeca Elmston and Lt. General Sir William Congreve, 1st Baronet, the Comptroller of the Royal Laboratories at the Royal Arsenal and raised in Kent, England. He was educated at Newcome's school in Hackney, Wolverhampton Grammar School and Singlewell School in Kent. He then studied law at Trinity College, Cambridge, graduating BA in 1793 and MA in 1796. In 1814 he succeeded his father as second Baronet Congreve. In 1803 he was a volunteer in the London and Westminster Light Horse, and was a London businessman who published a polemical newspaper, the ''Royal Standard and Political Register'', which was Tory, pro-government and anti-Cobbett. Following a damaging libel action ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
