Can be operated by a single person, easily and with little noise. The device depicted here is also illustrated on Plate 166.
Mechanics: hand crank; worm and worm gear; double toggle linkage.
|Place of publication|
|Original file type||TIFF|
|Rights||Public Domain Mark 1.0|
|View in library catalog|
Ramelli, Agostino. “Plate 167: Screw-Jack for Bending or Breaking the Iron Gratings Protecting a City Wall or Canal.” In Le Diverse Et Artificiose Machine Del Capitano Agostino Ramelli. Paris, France, 1588. https://digital.sciencehistory.org/works/4f16c3110.
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