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2. Treadwheel crane - Wikipedia

   en.wikipedia.org/wiki/Treadwheel_crane

   Additionally, the crane master who usually gave orders at the treadwheel workers from outside the crane was able to manipulate the movement laterally by a small rope attached to the load. [16] Slewing cranes which allowed a rotation of the load and were thus particularly suited for dockside work appeared as early as 1340. [17]

3. Engine crane - Wikipedia

   en.wikipedia.org/wiki/Engine_crane

   The electric chain hoist, also known as the "electric hoist", is the least used type of engine crane. The operation is similar to the chain hoist in the way that chains are used to lift the engine. The electric chain hoist uses an electric motor operated by remote control to lift the engine, unlike the chain hoist where the operator has to ...

4. American Crane Corporation - Wikipedia

   en.wikipedia.org/wiki/American_Crane_Corporation

   American Crane Corporation is an American manufacturer of construction cranes based in Wilmington, North Carolina. It manufacturers lattice boom crawler cranes with capacities ranging from 50 to 275 tons. The American Crane Corporation was founded in 1882 as the Franklin Manufacturing Company, and in 1892 the name changed to American Hoist ...

5. Crane (machine) - Wikipedia

   en.wikipedia.org/wiki/Crane_(machine)

   A jib crane is a type of crane - not to be confused with a crane rigged with a jib to extend its main boom - where a horizontal member (jib or boom), supporting a moveable hoist, is fixed to a wall or to a floor-mounted pillar. Jib cranes are used in industrial premises and on military vehicles.

6. Hoist (device) - Wikipedia

   en.wikipedia.org/wiki/Hoist_(device)

   Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.

7. Ajax (crane barge) - Wikipedia

   en.wikipedia.org/wiki/Ajax_(crane_barge)

   Ajax is a floating crane built to move and install the canal locks and other large parts of the Panama Canal. Ajax also helped in ship repairs and clearing the canal as needed. Ajax and her identical sister crane, the Hercules, were the largest floating cranes at time of completion, able to install the massive Panama Canal locks.