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Plate 163: Screw-jack for breaking the bolt off a door

  • 1588

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Public Domain

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The machine is braced against the chest. Can be operated by a single person, easily and with little noise.

Mechanics: hand crank; worm and worm gear.

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  • 38 cm H
Subject
Rights Public Domain Mark 1.0
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  • Courtesy of Science History Institute

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Cite as

Ramelli, Agostino. “Plate 163: Screw-Jack for Breaking the Bolt off a Door.” In Le Diverse Et Artificiose Machine Del Capitano Agostino Ramelli. Paris, France, 1588. https://digital.sciencehistory.org/works/2n49t198r.

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