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Signalling Block System
Signalling block systems enable the safe and efficient operation of railways by preventing collisions between trains. The basic principle is that a track is broken up into a series of sections or "blocks". Only one train may occupy a block at a time, and the blocks are sized to allow a train to stop within them. That ensures that a train always has time to stop before getting dangerously close to another train on the same line. The block system is referred to in the UK as the ''method of working'', in the US as the ''method of operation'', and in Australia as ''safeworking''. In most situations, a system of signals is used to control the passage of trains between the blocks. When a train enters a block, signals at both ends change to indicate that the block is occupied, typically using red lamps or indicator flags. When a train first enters a block, the rear of the same train has not yet left the previous block, so both blocks are marked as occupied. That ensures there is slight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Block Instrument
Block or blocked may refer to: Arts, entertainment and media Broadcasting * Block programming, the result of a programming strategy in broadcasting * W242BX, a radio station licensed to Greenville, South Carolina, United States known as ''96.3 the Block '' * WFNZ-FM, a radio station licensed to Harrisburg, North Carolina, United States, branded as ''92.7 The Block'' * Blocked (''The Flash''), an episode of the television series ''The Flash'' Music * Block Entertainment, a record label * Blocks Recording Club, a record label * Woodblock (instrument), a small piece of slit drum made from one piece of wood and used as a percussion instrument * "Blocks", by C418 from '' Minecraft - Volume Beta'', 2013 Toys * Toy block, one of a set of wooden or plastic pieces, of various shapes * Unit block, a type of standardized wooden toy block for children Video game * Blocked (video game), a puzzle game for the iPhone and iPod Touch Building and construction * Breeze block, cinder block o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Block Instruments-9
Block or blocked may refer to: Arts, entertainment and media Broadcasting * Block programming, the result of a programming strategy in broadcasting * W242BX, a radio station licensed to Greenville, South Carolina, United States known as ''96.3 the Block '' * WFNZ-FM, a radio station licensed to Harrisburg, North Carolina, United States, branded as ''92.7 The Block'' * Blocked (''The Flash''), an episode of the television series ''The Flash'' Music * Block Entertainment, a record label * Blocks Recording Club, a record label * Woodblock (instrument), a small piece of slit drum made from one piece of wood and used as a percussion instrument * "Blocks", by C418 from '' Minecraft - Volume Beta'', 2013 Toys * Toy block, one of a set of wooden or plastic pieces, of various shapes * Unit block, a type of standardized wooden toy block for children Video game * Blocked (video game), a puzzle game for the iPhone and iPod Touch Building and construction * Breeze block, cinder block or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-line Working
On a railway Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a prep ..., single-line workingDriver's Rulebook: Module P1 - Sections 1 to 6 Single line working refers to the practice where, when one line out of the two lines is blocked, trains are able to use the other in either direction.Brainscape Flashcards: Single line working /ref> This is usually when a line is out of use for maintenanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Fothergill Cooke
Sir William Fothergill Cooke (4 May 1806 – 25 June 1879) was an English inventor. He was, with Charles Wheatstone, the co-inventor of the Cooke-Wheatstone electrical telegraph, which was patented in May 1837. Together with John Ricardo he founded the Electric Telegraph Company, the world's first public telegraph company, in 1846. He was knighted in 1869. Life He was born at Ealing, Middlesex; his father, William Cooke, was a surgeon there, and later was appointed professor of anatomy at the University of Durham. He was educated at Durham School and at the University of Edinburgh, and at the age of 20 entered the Indian Army. After five years' service in India Cooke returned home; then studied medicine in Paris, and at Heidelberg under Georg Wilhelm Munke. In 1836 he saw electric telegraphy, then only experimental: Munke had illustrated his lectures with a telegraphic apparatus on the principle introduced by Pavel Schilling in 1835. Cooke decided to put the invention into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Midland Railway
The North Midland Railway was a British railway company, which opened its line from Derby to Rotherham (Masbrough) and Leeds in 1840. At Derby, it connected with the Birmingham and Derby Junction Railway and the Midland Counties Railway at what became known as the Tri-Junct Station. In 1844, the three companies merged to form the Midland Railway. Origin The East Midlands had for some years been at the centre of plans to link the major cities throughout the country. In Yorkshire, George Hudson was the Chairman of the York and North Midland Railway, a proposed line from York towards the industrial markets of Manchester and Liverpool. The new line would connect it, and the Manchester and Leeds Railway as part of a trunk route from the South and London to Yorkshire and the North East of England. Meanwhile, financiers in Birmingham, were looking to expand their system northwards. George Carr Glyn was the first Chairman of the new company, with George Stephenson appointed as e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay Cross Tunnel
Clay Cross Tunnel is a tunnel on the former North Midland Railway line near Clay Cross in Derbyshire, England, now part of the Midland Main Line. Construction It was designed by George Stephenson with an estimate of £96,000 for construction. The tenders for the work were issued by the North Midland Railway in December 1836. The contractors appointed were Messrs. Hardy, Copeland and Cropper of Watford for the sum of £105,400 (). The tunnel was to be wide and high with a bed of broken stone at the base deep to form the rail bed. The tunnel was to be arched completely round with brickwork laid in Roman cement deep in the roof and walls, and deep in the floor. Approximately 15 million bricks were required for the tunnel lining. The greatest depth below the surface was about . Construction began on 2 February 1837 when the first sod was turned for the sinking of the ventilation shaft in the centre of the tunnel. The boring of the tunnel was not straightforward, eventually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cooke And Wheatstone Telegraph
The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke and English scientist Charles Wheatstone. It was a form of needle telegraph, and the first telegraph system to be put into commercial service. The receiver consisted of a number of needles which could be moved by electromagnetic coils to point to letters on a board. This feature was liked by early users who were unwilling to learn codes, and employers who did not want to invest in staff training. In later systems the letter board was dispensed with, and the code was read directly from the movement of the needles. This came about because the number of needles was reduced, leading to more complex codes. The change was motivated by the economic need to reduce the number of telegraph wires used, which was related to the number of needles. The change became more urgent as the insulation of some of the early installations deteriorat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2012 Summer Olympics
The 2012 Summer Olympics (officially the Games of the XXX Olympiad and also known as London 2012) was an international multi-sport event held from 27 July to 12 August 2012 in London, England, United Kingdom. The first event, the group stage in women's football, began on 25 July at the Millennium Stadium in Cardiff, followed by the opening ceremony on 27 July. 10,768 athletes from 204 National Olympic Committees (NOCs) participated in the 2012 Olympics. Following a bid headed by former Olympic champion Sebastian Coe and the then-London mayor Ken Livingstone, London was selected as the host city at the 117th IOC Session in Singapore on 6 July 2005, defeating bids from Moscow, New York City, Madrid, and Paris. London became the first city to host the modern Olympics three times, having previously hosted the Summer Games in 1908 and 1948. Construction for the Games involved considerable redevelopment, with an emphasis on sustainability. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Underground
The London Underground (also known simply as the Underground or by its nickname the Tube) is a rapid transit system serving Greater London and some parts of the adjacent counties of Buckinghamshire, Essex and Hertfordshire in England. The Underground has its origins in the Metropolitan Railway, the world's first underground passenger railway. Opened on 10 January 1863, it is now part of the Circle, District, Hammersmith & City and Metropolitan lines. The first line to operate underground electric traction trains, the City & South London Railway in 1890, is now part of the Northern line. The network has expanded to 11 lines, and in 2020/21 was used for 296 million passenger journeys, making it one of the world's busiest metro systems. The 11 lines collectively handle up to 5 million passenger journeys a day and serve 272 stations. The system's first tunnels were built just below the ground, using the cut-and-cover method; later, smaller, roughly circular tu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Line
The Northern line is a London Underground line that runs from North London to South London. It is printed in black on the Tube map. The Northern line is unique on the Underground network in having two different routes through central London, two southern branches and two northern branches. Despite its name, it does not serve the northernmost stations on the Underground, though it does serve the southernmost station at , the terminus of one of the two southern branches. The line's northern termini, all in the London Borough of Barnet, are at and ; is the terminus of a single-station branch line off the High Barnet branch. The two main northern branches run south to join at where two routes, one via in the West End and the other via in the City, continue to join at in Southwark. At Kennington, the line again divides into two branches, one to each of the southern termini at , in the borough of Merton, and in Wandsworth. For most of its length it is a deep tube line. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jubilee Line
The Jubilee line is a London Underground line that runs between in east London and in the suburban north-west, via the Docklands, South Bank and West End. Opened in 1979, it is the newest line on the Underground network, although some sections of track date back to 1932 and some stations to 1879. The western section between and was previously a branch of the Metropolitan line and later the Bakerloo line, while the newly built line was completed in two major sections: initially in 1979 to , then in 1999 with an extension to Stratford. The later stations are larger and have special safety features, both aspects being attempts to future-proof the line. Following the extension to east London, serving areas once poorly connected to the Underground, the line has seen a huge growth in passenger numbers and is the third-busiest on the network (after the Northern and Central lines), with over 213 million passenger journeys in 2011/12. Between and the Jubilee line shares its r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Positioning System
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephonic or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
