Model of an Ordinary Jack Screw, anonymous, c. 1780 - c. 1807 demonstration model Model of a normal stupid power, decorated with batter. The model is operated with a crank. On the other hand there is a jack and on top of a T-shaped jack. The mechanism, which works with a worm screw, is extracted from the face; At the front is a peephole. Two handles on the sides. Netherlands wood (plant material). brass (alloy). iron (metal)

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Size: 4182px × 5921px
Photo credit: © piemags/rmn / Alamy / Afripics
License: Licensed
Model Released: No

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