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Track Tamper
A tamping machine or ballast tamper, informally simply a tamper, is a self-propelled, rail-mounted machine used to pack (or tamp) the track ballast under railway tracks to make the tracks and roadbed more durable and level. Prior to the introduction of mechanical tampers, this task was done by manual labour with the help of beaters. As well as being faster, more accurate, more efficient and less labour-intensive, tamping machines are essential for the use of concrete sleepers since they are too heavy (usually over ) to be lifted by hand. At its most basic, a tamping machine only packs the ballast. Some modern machines, sometimes known as tamper-liners or tamping and lining machines, also correct the alignment of the rails to make them parallel and level, in order to achieve a more comfortable ride for passengers and freight and to reduce the mechanical strain applied to the rails by passing trains. This is done by finding places where the sleepers have sunk from the weight of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Complete Workhead
Complete may refer to: Logic * Completeness (logic) * Completeness of a theory, the property of a theory that every formula in the theory's language or its negation is provable Mathematics * The completeness of the real numbers, which implies that there are no "gaps" in the real numbers * Complete metric space, a metric space in which every Cauchy sequence converges * Complete uniform space, a uniform space where every Cauchy net in converges (or equivalently every Cauchy filter converges) * Complete measure, a measure space where every subset of every null set is measurable * Completion (algebra), at an ideal * Completeness (cryptography) * Completeness (statistics), a statistic that does not allow an unbiased estimator of zero * Complete graph, an undirected graph in which every pair of vertices has exactly one edge connecting them * Complete tree (abstract data type), a tree with every level filled, except possibly the last * Complete category, a category ''C'' where every di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plasser American
Plasser & Theurer is an Austrian manufacturer of rail track maintenance and track laying machines. Plasser & Theurer was established in 1953. It is a privately owned company with 30% being held by Josef Theurer, 30% by his daughter Elisabeth Max-Theurer, 20% each by Dorothea Theurer and Hans-Jörg Holleis. Currently, the company is active in over 100 countries. History Plasser & Theurer was established in 1953 by a group of nine people, amongst them was Josef Theurer, the company's first CEO. Theurer played a key role in managing the business over the following six decades. Plasser & Theurer has long sought to integrate emerging technologies into its track maintenance products, particularly rapid developments made within the IT sector. By the mid-2000s, it held roughly 3,000 patents. The company has a dedicated R&D division that builds and tests prototypes, as well as continuously assessing various technologies from outside of the traditional rail sector. Further input is dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matisa
Matisa Matériel Industriel S.A. is a Swiss company that manufactures rail maintenance machines and provides associated services. It was founded in 1945 and is based in the canton of Vaud. History The origins of Matisa can be traced back to the working practices of early twentieth century railways; traditionally many of the reoccurring maintenance tasks involved in keeping lines in a safe operating condition had been almost exclusively performed by hand and involved strenuous effort, and thus necessitated considerable continuous labour costs being incurred. During the 1940s, the future founders of Matisa had recognised that mechanisation could improve not only the speed but ease and affordability of track maintenance tasks and had developed their own prototype tamping machine that would act to stabilise track beds while reducing human labour. During 1945, Matisa was established with the purpose of setting up industrial production of this tamper; the company quickly established itse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Track Centre
The track spacing is the distance between the track centres of double-track railway lines. There are standard distances derived from the standard loading gauge in a country. For high-speed trains and in tighter curves that distance needs to be increased. The track spacing is also called the ''centre-to-centre'' spacing to differentiate it from the ''edge-to-centre'' spacing of a railway. These two values may be different depending on how signal masts are added to the overall track geometry. Description The distance between the track centres makes a difference in cost and performance of a double-track line. The track centres can be as narrow and as cheap as possible, but maintenance must be done on the side. Signals for bi-directional working cannot be mounted between the tracks so must be mounted on the 'wrong' side of the line or on expensive Railroad signal#Gantry mounting, signal bridges. Track centres are usually wider on high-speed lines, as Aerodynamics, aerodynamic pressur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Crossing
A double junction is a railway junction where a double-track railway splits into two double track lines. Usually, one line is the main line and carries traffic through the junction at normal speed, while the other track is a branch line that carries traffic through the junction at reduced speed. A number of configurations are possible. At grade Diamond The simplest and oldest arrangement consists of two turnouts (points) and a fixed Diamond crossing. Because the diamond needs to be relatively coarse, say 1 in 8, the curve radius is necessarily small, leading to a speed of perhaps . This type of junction is common on street-running tramways, where speeds are quite low and junction must fit into the available road space. Because the points are close together, the entire junction can be controlled by the mechanical point rodding of a single signal box. Signal passed at danger (SPAD) protection — A train from R to P with 12 points reverse is protected from a train from P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad Switch
A railroad switch (American English, AE), turnout, or (set of) points (Commonwealth English, CE) is a mechanical installation enabling railway trains to be guided from one Rail tracks, track to another, such as at a Junction (rail), railway junction or where a Branch line, spur or Siding (rail), siding branches off. Design The parts of a turnout are known by different names in different jurisdictions. The main terms in U.S. and UK usage are shown in the selectable diagrams. In this article, the U.S. term is listed first and UK second, in parentheses. The most common type of switch consists of a pair of linked tapering rails, known as ''points'' (''switch rails'' or ''point blades''), lying between the diverging outer rails (the ''stock rails''). These points can be moved laterally into one of two positions to direct a train coming from the point blades toward the straight path or the diverging path. A train moving from the narrow end toward the point blades (i.e. it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northam, Western Australia
Northam is a town in the Wheatbelt region of Western Australia, situated at the confluence of the Avon and Mortlock Rivers. It is the largest town and regional centre in the Avon Valley region of the Central Wheatbelt. It is located approximately 97 kilometres (60 miles) north east of Perth, the capital city of Western Australia. At the time of the 2021 census, Northam had a population of 6,679. History The area around Northam was first explored in 1830 by a party of colonists led by Ensign Robert Dale, and subsequently founded in 1833. It was named by Governor Stirling, probably after a village of the same name in Devon, England. Almost immediately it became a point of departure for explorers and settlers who were interested in the lands which lay to the east. This initial importance declined with the growing importance of the nearby towns of York and Beverley, but the arrival of the railway made Northam the major departure point for prospectors and miners heading ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perth
Perth () is the list of Australian capital cities, capital city of Western Australia. It is the list of cities in Australia by population, fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth . The Extremes on Earth#Other places considered the most remote, world's most isolated major city by certain criteria, Perth is part of the South West Land Division of Western Australia, with most of Perth metropolitan region, Perth's metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp. The city has expanded outward from the original British settlements on the Swan River (Western Australia), Swan River, upon which its #Central business district, central business district and port of Fremantle are situated. Perth was founded by James Stirling (Royal Navy officer), Captain James Stirling in 1829 as the administrative centre of the Swan River Colony. The city is situated on the traditional lands of the Whadju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dual Gauge
Dual gauge railroad track has three or four rails, allowing vehicles of two track gauges to run on it. Signalling and sidings are more expensive to install on dual gauge tracks than on two single gauge tracks. Dual gauge is used when there is not enough room for two single tracks or when tracks of two different gauges meet in marshalling yards or train stations. Background The rail gauge is the most fundamental specification of a railway. Rail tracks and Wheelset (rail transport), wheelsets are built within engineering tolerances that allow optimum lateral movement of the wheelsets between the rails. Pairs of rails that become too wide or narrow in gauge will cause derailments, especially if in excess of normal gauge-widening on curves. Given the requirement for gauge to be within very tight limits, when the designed distance between the pair of wheels on a wheelset differs even slightly from that of others on a railway, track must be built to two specific gauges. That is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Tie
A railroad tie, crosstie (American English), railway tie (Canadian English Canadian English (CanE, CE, en-CA) encompasses the Variety (linguistics), varieties of English language, English used in Canada. According to the 2016 Canadian Census, 2016 census, English was the first language of 19.4 million Canadians or ...) or railway sleeper (Australian English, Australian and British English) is a rectangular support for the Track (rail transport), rails in railroad tracks. Generally laid perpendicular to the rails, ties transfer loads to the track ballast and subgrade, hold the rails upright and keep them spaced to the correct rail gauge, gauge. Railroad ties are traditionally made of wood, but prestressed concrete is now also widely used, especially in Europe and Asia. Steel ties are common on secondary lines in the UK; Composite lumber, plastic composite ties are also employed, although far less than wood or concrete. As of January 2008, the approximate market share in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glenbrook Tunnel (1913)
The Glenbrook Tunnel is a double-track railway tunnel located on the Main Western Line, near Glenbrook, in the City of Blue Mountains local government area of New South Wales, Australia. The property is owned by the Transport Asset Holding Entity. The railway tunnel is part of the Glenbrook 1913 double-track deviation, which replaced the Glenbrook 1892 single-track deviation across the Blue Mountains. The tunnel is long and was officially opened on 11 May 1913. Description At , the 1913 tunnel was shorter than the 1892 Glenbrook Tunnel. However, the 1913 deviation was approximately longer than the 1892 deviation. The 1913 deviation did not improve the time taken to climb or descend the pass between Emu Plains and Blaxland stations, however a reduction in gradient from 1:30 to 1:60 made the pass more manageable and reduced challenges with steam locomotives in tunnels on significant gradients, including reducing the possibility of suffocation. Initially it was planned t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
