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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.
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)
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]
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.
Chebyshev linkages did not receive widespread usage in steam engines, [citation needed] but are commonly used as the 'Horse head' design of level luffing crane.In this application the approximate straight movement is translated away from the line's midpoint, but it is still essentially the same mechanism.
The Port of Baltimore shared an image of the crane barge, Donjon's Chesapeake 1000, which ABC News reported was onsite Friday morning at the site of the Francis Scott Key Bridge. The span ...
Crane or large vehicle drivers do not always have clear visibility of the loading area, especially when tower cranes are employed. The banksman is in charge of the crane movements from the point of loading and unloading. They may use a system of hand signals or a radio link.
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