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A block used in hauling in the pursing line or bridle of a purseseine. Two of these attached o the purse-davit by hooks.

Pursing Block

A block used in hauling in the pursing line or bridle of a purseseine. Two of these attached o the purse-davit…

A crane is a lifting machine, generally equipped with a winder, wire ropes or chains and sheaves, that can be used both to lift and lower materials and to move them horizontally. It uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. Cranes are commonly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials and in the manufacturing industry for the assembling of heavy equipment.

Crane for Lifting Cars

A crane is a lifting machine, generally equipped with a winder, wire ropes or chains and sheaves, that…

The first reference to an elevator is in the works of the Roman architect Vitruvius, who reported that Archimedes built his first elevator, probably in 236 BC. In some literary sources of later historical periods, elevators were mentioned as cabs on a hemp rope and powered by hand or by animals. It is supposed that elevators of this type were installed in the Sinai monastery of Egypt.

Elevating Apparatus

The first reference to an elevator is in the works of the Roman architect Vitruvius, who reported that…