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Bow Collector
A bow collector is one of the three main devices used on tramcars to transfer electric current from the wires above to the tram below. While once very common in continental Europe, it was replaced by the pantograph or the trolley pole, itself often later replaced by the pantograph. Origins When the bow collector was first conceived by German inventor Ernst Werner von Siemens in the late 1880s, American inventor Frank J. Sprague of Virginia had just patented his trolley pole system of current collection from an overhead wire. To avoid contravening this patent, the Siemens company was forced to design its own, unique form of current collection, namely the bow collector. The bow collector was first used by the Siemens electric company in its early electric tramcars in either the late 1880s or early 1890s. The Hobart electric tramway system - the first of its kind in the Southern Hemisphere, opened in 1893 - used Siemens cars with very early bow collectors. Many other continental E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Train Oberbozen
In rail transport, a train (from Old French , from Latin , "to pull, to draw") is a series of connected vehicles that run along a railway track and transport people or freight. Trains are typically pulled or pushed by locomotives (often known simply as "engines"), though some are self-propelled, such as multiple units. Passengers and cargo are carried in railroad cars, also known as wagons. Trains are designed to a certain gauge, or distance between rails. Most trains operate on steel tracks with steel wheels, the low friction of which makes them more efficient than other forms of transport. Trains have their roots in wagonways, which used railway tracks and were powered by horses or pulled by cables. Following the invention of the steam locomotive in the United Kingdom in 1804, trains rapidly spread around the world, allowing freight and passengers to move over land faster and cheaper than ever possible before. Rapid transit and trams were first built in the late 1800s to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground (electricity)
In electrical engineering, ground or earth is a reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth. Electrical circuits may be connected to ground for several reasons. Exposed conductive parts of electrical equipment are connected to ground, to protect users from electrical shock hazard. If internal insulation fails, dangerous voltages may appear on the exposed conductive parts. Connecting exposed parts to ground will allow circuit breakers (or RCDs) to interrupt power supply in the event of a fault. In electric power distribution systems, a protective earth (PE) conductor is an essential part of the safety provided by the earthing system. Connection to ground also limits the build-up of static electricity when handling flammable products or electrostatic-sensitive devices. In some telegraph and power transmission circuits, the ground itself can be used as one condu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Rail Transport
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Current Collector
Electric current collectors are used by trolleybuses, trams, electric locomotives or EMUs to carry electrical power from overhead lines, electrical third rails, or ground-level power supplies to the electrical equipment of the vehicles. Those for overhead wires are roof-mounted devices, those for rails are mounted on the bogies. Typically, electric current connectors have one or more spring-loaded arms that press a collector or contact shoe against the rail or overhead wire. As the vehicle moves, the contact shoe slides along the wire or rail to draw the electricity needed to run the vehicle's motor. The current collector arms are electrically conductive but mounted insulated on the vehicle's roof, side or base. An insulated cable connects the collector with the switch, transformer or motor. The steel rails of the tracks act as the electrical return. Electric vehicles that collect their current from an overhead line system use different forms of one- or two-arm pantograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manx Electric Railway
The Manx Electric Railway ( Manx: ''Raad Yiarn Lectragh Vannin'') is an electric interurban tramway connecting Douglas, Laxey and Ramsey in the Isle of Man. It connects with the Douglas Bay Horse Tramway at its southern terminus at Derby Castle at the northern end of the promenade in Douglas, and with the Snaefell Mountain Railway at Laxey. Many visitors take an excursion on the trams. It is the oldest electric tram line in the world whose original rolling stock is still in service. History The Manx Electric Railway was built by Alexander Bruce, a banker, Frederick Saunderson, a civil engineer and Alfred Jones Lusty, a land owner, who formed the Douglas Bay Estate company to develop land north of Douglas. Construction started in 1893 with the short line from a depot at Derby Castle Depôt in Douglas to Groudle Glen, and regular public services started on 7 September 1893. Anticipating the second stage of the railway (an extension from Groudle to Laxey), the company was known a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fell Mountain Railway System
The Fell system was the first third-rail system for steep grade railway, railways that were too steep to be Rail adhesion, worked by adhesion on the two running rails alone. It uses a raised centre rail between the two running rails to provide extra traction and braking, or braking alone. Trains are propelled by wheels or braked by shoes pressed horizontally onto the centre rail, as well as by the normal running wheels. Extra brake shoes are fitted to specially designed or adapted Fell locomotives and brake vans, and for traction the locomotive has an auxiliary engine powering horizontal wheels which clamp onto the third rail. The Fell system was developed in the 1860s and was soon superseded by various types of rack railway for new lines, but some Fell systems remained in use into the 1960s. The Snaefell Mountain Railway still uses the Fell system for (emergency) braking, but not for traction. History The Fell system was designed, developed and patented by British engineer Jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BackTrack (magazine)
''BackTrack'' is a monthly magazine, published by Pendragon Publishing, concentrating on researched articles and photographic features about British and Irish railway history. It is available through newsagents in the UK and by subscription from the publisher, but does not rely on advertising income and therefore does not publish an ABC circulation figure. History The magazine was founded in 1986 by Nigel Trevena, of Atlantic Transport Publishers (based in Truro, Cornwall), for the purpose of "recording Britain's railway history" (strapline until mid-1993). The editorial in the 'introductory issue' promised that each issue would contain "at least one article on each or the ' Big Four' companies ... (or their respective BR region)", would have "a branch line article in every issue" and would ''ignore'' current developments and the preservation scene. The magazine generally adheres to these principles even today, and it claims to be the leading (general purpose) railway histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Hopkinson
John Hopkinson, FRS, (27 July 1849 – 27 August 1898) was a British physicist, electrical engineer, Fellow of the Royal Society and President of the IEE (now the IET) twice in 1890 and 1896. He invented the three-wire (three-phase) system for the distribution of electrical power, for which he was granted a patent in 1882. He also worked in many areas of electromagnetism and electrostatics, and in 1890 was appointed professor of electrical engineering at King's College London, where he was also director of the Siemens Laboratory. Hopkinson's law, the magnetic counterpart to Ohm's law, is named after him. Life and career John Hopkinson was born in Manchester, the eldest of 5 children. His father, also called John, was a mechanical engineer. He was educated at Queenwood School in Hampshire and Owens College in Manchester. He won a scholarship to Trinity College, Cambridge in 1867 and graduated in 1871 as Senior Wrangler, having placed first in the demanding Cambridge Mathemati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catenary
In physics and geometry, a catenary (, ) is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends in a uniform gravitational field. The catenary curve has a U-like shape, superficially similar in appearance to a parabola, which it is not. The curve appears in the design of certain types of arches and as a cross section of the catenoid—the shape assumed by a soap film bounded by two parallel circular rings. The catenary is also called the alysoid, chainette,MathWorld or, particularly in the materials sciences, funicular. Rope statics describes catenaries in a classic statics problem involving a hanging rope. Mathematically, the catenary curve is the graph of the hyperbolic cosine function. The surface of revolution of the catenary curve, the catenoid, is a minimal surface, specifically a minimal surface of revolution. A hanging chain will assume a shape of least potential energy which is a catenary. Galileo Galil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snaefell Mountain Railway
The Snaefell Mountain Railway ( gv, Raad Yiarn Sniaull) is an electric mountain railway on the Isle of Man in Europe. It joins the village of Laxey with the summit of Snaefell, at above sea level the highest point on the island. It connects with the Manx Electric Railway (MER) in Laxey. The line is long, is built to gauge and uses a Fell Incline Railway System centre rail for braking on the steep gradients. It is electrified using overhead wires at 550 volts direct current, with bow collectors. Operation The railway operates from March to early November, taking 30 minutes for a one-way journey. In winter the overhead wires on the exposed upper part of the route are dismantled to avoid damage from icing. All passenger traffic is carried in five wooden-bodied electric railcars, built in 1895 and numbered 1, 2, 4, 5 and 6. Car 3 was destroyed in 2016. Car 5 was burned out in an accident in 1970 and its body is a replacement built in 1971 to a similar design. The cars were re-equ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Of Man
) , anthem = "O Land of Our Birth" , image = Isle of Man by Sentinel-2.jpg , image_map = Europe-Isle_of_Man.svg , mapsize = , map_alt = Location of the Isle of Man in Europe , map_caption = Location of the Isle of Man (green) in Europe (dark grey) , subdivision_type = Sovereign state , subdivision_name = United Kingdom , established_title = Norse control , established_date = 9th century , established_title2 = Scottish control , established_date2 = 2 July 1266 , established_title3 = English control , established_date3 = 1399 , established_title4 = Revested into British Crown , established_date4 = 10 May 1765 , official_languages = , capital = Douglas , coordinates = , demonym = Manx; Manxman (plural, Manxmen); Manxwoman (plural, Manxwomen) , ethnic_groups = , ethnic_groups_year = 2021 , ethnic_groups_ref = Official census statistics provided by Statistics Isle of Man, Isle of Man Government: * * , religion = , religion_year = 2021 , relig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snaefell Summit Station - Geograph
Snaefell ( on, snjœ-fjall/snjó-fall – snow mountain) – ( gv, Sniaull) is the highest mountain and the only summit higher than on the Isle of Man, at above sea level. The summit is crowned by a railway station, cafe and several communications masts. Views It is a well-known saying in the Isle of Man that on a clear day six kingdoms can be seen from the top: the Isle of Man, England, Ireland, Scotland, Wales and Heaven. Some versions add a seventh kingdom, that of Manannán (or the sea). The plaque at the summit indicates the directions of five points from Snaefell as well as their distances: * to the Mull of Galloway (Scotland) * to Scafell (England) * to the Mountains of Mourne (Northern Ireland) * to Liverpool (England) * to Dublin (Republic of Ireland) (For some reason, Wales is absent from the plaque). While highly dependent on weather conditions and visibility, all of the four countries of the United Kingdom can be seen from the summit of Snaefell. This i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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