Can be operated by a single person, easily and with little noise. See Plate 156 for illustration of this screw-jack in operation.
Mechanics: worm and worm gear.
Ramelli, Agostino. “Plate 155: Mechanism of 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/td96k290x.
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