Hydraulic jigger

A decommissioned jigger, once used to open dock gates at Millwall Docks in London

Portable winch, used in the Albert Dock, Liverpool

A hydraulic jigger is a hydraulically-powered mechanical winch.

From the mid-19th century, hydraulic power became available throughout the increasingly modern dockyards and warehouses. This was generated centrally and distributed by pipework, either around a dock estate, or across a city by the new hydraulic power networks.

单词	Hydraulic jigger
释义	Hydraulic jigger 英语百科 Hydraulic jigger A hydraulic jigger is a hydraulically-powered mechanical winch. From the mid-19th century, hydraulic power became available throughout the increasingly modern dockyards and warehouses. This was generated centrally and distributed by pipework, either around a dock estate, or across a city by the new hydraulic power networks.
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