Jack (device)
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A jack is a mechanical lifting device. Most often, the term "jack" denotes equipment used to apply great forces or lift heavy loads. There are also smaller, more delicate jacks used as part of the act
A private in the Auxiliary Territorial Service using a jack to lift a staff car, January 1945
A jack which can lift a mobile home
Jackscrews are integral to the scissor jack, one of the simplest kinds of car jack still used.
A house jack, standing 24 in (61 cm) from top to bottom when fully extended, capable of lifting 2.5 tons
Jackscrew
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A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderate and heavy weights, such as vehicles; to raise and lower the horizontal stabi
Jack (device)
…force acting from below' is from 1679, referring to 'an Engine used for the removing and commodious placing of great Timber.' Jackscrew Scissor jack Jackscrews are integral to the scissor jack, one of the simplest kinds of car jack still used. A scissor jack uses the mechanical advantage of a leadscrew and…
In the 19th century, the Raising of Chicago involved entire city blocks being lifted with jackscrews.
An electronics module mounted on the back of a large electrical connector incorporating two very long T-handle jackscrews