Can be operated by a single person, easily and with little noise. See Plate 155 for illustration of its mechanism.
Mechanics: worm and worm gear.
Ramelli, Agostino. “Plate 156: Screw-Jack for Lifting a Door from Its Hinges.” In Le Diverse Et Artificiose Machine Del Capitano Agostino Ramelli. Paris, France, 1588. https://digital.sciencehistory.org/works/3r074v241.
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