Collection on deposit
Worm-screw jack
Model of travelling collection
Project and realization:
IBM, 1952
Model from:
Leonardo da Vinci, Codice di Madrid, f. 26r
Wood, iron, rope
cm 86,5 x 49,5 x 28
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Description:
The weight to be lifted is attached to the large vertical screw that passes through the annular and horizontal nut thread resting on ball-bearings or anti-friction rollers. The nut thread, being made to rotate with a crank, forces the screw to raise the load.
