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bow of a pantograph

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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 has now been largely replaced by the pantograph. OriginsWhen… …   Wikipedia

  • Pantograph (rail) — A pantograph is a device that collects electric current from overhead lines for electric trains or trams. The term stems from the resemblance to pantograph devices for copying writing and drawings. A flat side pantograph was invented 1895 at the… …   Wikipedia

  • Overhead lines — This article is about the transmission of electrical power to road and rail vehicles. For transmission of bulk electrical power to general consumers, see Electric power transmission. For powerlines mounted on pylons, see overhead power line.… …   Wikipedia

  • Trolley pole — For the weapon, see Trolley pole (weapon). . [cite web| url=http://ocw.mit.edu/OcwWeb/Civil and Environmental Engineering/1 012Spring2002/Readings/detail/green line project.htm| title=Boston Transit Milestones| author=Dr. Romin Koebel| work=MIT… …   Wikipedia

  • Current collector — Chicago Transit Authority third rail contact shoe of Chicago L car …   Wikipedia

  • Railway electrification system — Railway electrification supplies electrical energy to railway locomotives and multiple units so they can operate without having a reciprocating engine of their own.CharacteristicsThe main advantage of electric traction is a higher power to weight …   Wikipedia

  • British Rail Class ES1 — North Eastern Railway Class ES1 NER No.1, Locomotion museum, Shildon Power type Electric Builder British Thomson Houston, with mechanical parts sub contr …   Wikipedia

  • Docklands Light Railway rolling stock — B07 stock train in 2008 livery at Poplar DLR station The interior of the new B07 Ro …   Wikipedia

  • Drill — For other uses, see Drill (disambiguation). Drill scheme A drill or drill motor is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for drilling holes in various materials or… …   Wikipedia

  • Lathe — A lathe (pronEng|ˈleɪð) is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has… …   Wikipedia

  • Tap and die — Not to be confused with Tool and die. Taps and dies are cutting tools used to create screw threads, which is called threading. A tap is used to cut the female portion of the mating pair (e.g., a nut). A die is used to cut the male portion of the… …   Wikipedia

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