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A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [ 1 ] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.
Kirow Ardelt GmbH Eberswalde, referred to as Ardelt, is a German crane manufacturer. The company specialises in manufacturing double jib level luffing cranes which are based on the patented double jib principle. Ardelt has produced more than 4,700 harbour cranes. [1] Ardelt also makes single jib-level luffing cranes and balancer cranes.
Formerly North Carolina Museum of Life and Science, science and natural history exhibits Museum of North Carolina Minerals: Spruce Pine: Mitchell: Western: Natural history: Minerals and gems found in the area and state [65] [66] Museum of North Carolina Traditional Pottery: Seagrove: Randolph: Piedmont Triad: Art: Features displays from ...
The facility was later renamed the North Carolina State Museum of Natural History. [7] In the 1950s and again in the 1990s, shifts in education further expanded the museum's holdings as universities donated their collections to the state. [1] In 1986, the museum was renamed to The North Carolina State Museum of Natural Sciences. [4]
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en:Stothert & Pitt electric dockside crane with Toplis level luffing gear. Bristol Industrial Museum: Date: Photo June 2004. Source: Cropped from Image:Bristol pw from ms.jpg so as to show a better close-up of a single crane. Author: Joe D (original photographer) Permission (Reusing this file)
Electric cranes, supplied by electricity from a single centralised generating station or prime mover, could offer a lot of power per crane, without requiring the high cost of an equivalent steam plant on each crane. Port cranes were almost all luffing jib cranes, often with a long reach. Their lifting capacity depended on how far they were ...
This specific example uses a level luffing mechanism to maintain the load at approximately the same vertical height as the jib moves through its range of travel. A jib or jib arm is the horizontal or near-horizontal beam used in many types of crane to support the load clear of the main support. [1] [2] An archaic spelling is gib. [3]