Sheet of mechanical devices with weights, hinges and a wall-cladding note
Screw jacks, trestles and presses annotated with forces and measures in braccia
The crowded sheet gathers many mechanical sketches — trestles, platforms, screw jacks, presses, pulleys and hinges. Notes give quantities: a shaped piece of 100 balanced by 120 of counterweight is left with 20 pounds of power that it consumes, a member measures 4 braccia, and a part is hung from a beam with thin pegs set in its rings. Turning the sheet, a further note explains how to clad a wall with plates of material, nailed on the sides and joined by welding.
On this page
Counterweight balance of a shaped member
A note at the upper left reckons the forces: 100 for the shaped (profiled) piece and 120 for its counterweights, so that the shaped piece will have 20 pounds of power which it consumes. It weighs the working load against the counterweight of a mechanism.
Member hung from a beam by pegged rings
A note near the left margin directs that the part be attached to a beam, with thin pegs put into the rings. A neighbouring hinge drawing is marked '4 braccia'. Together they specify how a heavy element is suspended and sized.
Screw jacks, presses and trestles
The sheet is filled with built mechanisms: trestle-mounted platforms, screw-threaded jacks and presses, pulleys and clamps. A tall threaded jack rises at the right, with further press frames below. The numbers '100 - 10' label one of the drawings.
Cladding a wall with plates
A note written across the turned sheet instructs the reader to clothe the wall with plates of material, first stretched and nailed on the sides, then joined together by welding or in pyramid form. It describes a technique for facing a wall with plate.