Mašina dizalica za podizanje velikih i teških tereta (nazvana po tome što njena gvozdena konstrukcija potseća na dugački vrat ptice ždrala). (nem.)
ETYM AS. cran; akin to Dutch and LG. craan, German kranich, krahn, Greek geranos, Latin grus, W. and Armor. garan, Old Slav. zeravi, Lith. gerve, Icel. trani, Swed. trana, Dan. trane. Related to Geranium.
1. Large long-necked wading bird of marshes and plains in many parts of the world.
2. Lifts and moves heavy objects; lifting tackle is suspended from a pivoted boom that rotates around a vertical axis.
In engineering, a machine for raising, lowering, or placing in position heavy loads. The three main types are the jib crane, the overhead traveling crane, and the tower crane. Most cranes have the machinery mounted on a revolving turntable. This may be mounted on trucks or be self-propelled, often being fitted with caterpillar tracks.
The main features of a jib crane are a power winch, a rope or cable, and a movable arm or jib. The cable, which carries a pulley block, hangs from the end of the jib and is wound up and down by the winch. The overhead traveling crane, chiefly used in workshops, consists of a fixed horizontal arm, along which runs a trolley carrying the pulley block. Tower cranes, seen on large building sites, have a long horizontal arm able to revolve on top of a tall tower. The arm carries the trolley.
ETYM Orig., a gallows, from a hangman named Derrick. The name is of Dutch origin; Dutch Diederik, Dierryk, prop. meaning, chief of the people; cf. AS. peódric, Eng. Theodoric, German Dietrich. Related to Dutch, and Rich.
1. A framework erected over an oil well to allow drill tubes to be raised and lowered.
2. A simple crane having lifting tackle slung from a boom.
Hoisting mechanism using a boom and a central post.
Simple lifting machine consisting of a pole carrying a block and tackle. Derricks are commonly used on ships that carry freight. In the oil industry the tower used for hoisting the drill pipes is known as a derrick.