Cloth-napping machines, springs and gears
Cylinders wound with cloth, a return spring, and columns of arithmetic
The sheet is crowded with mechanical studies drawn in several orientations: cylinders wound with cloth to be teaselled, a two-cylinder machine, a strong return spring, and various gear- and drum-driven devices, with small round instruments at the upper right. Marginal notes give building instructions, such as making the pole a full beam so it does not turn too easily, and a spring stiff enough not to strike the bottom of its notch. Columns of arithmetic and stray numbers (1200, 24) accompany the drawings. A block of further untranscribed notes appears at the top centre of the sheet.
On this page
Cloth to be teaselled crosswise
A cylinder wound with cloth carries the instruction that the cloth must be raised, or teaselled, crosswise. It is one of several napping machines for finishing woven cloth drawn across the sheet.
Make the pole a full beam
Beside a machine with two cylinders, a note advises making the pole entirely into a beam (subbio) so that it will not turn too easily. The remark tunes the resistance of the winding roller.
A strong, quiet return spring
A spring drawn beneath one cylinder machine must be stiff and bend little, so that on release it does not touch the bottom of its notch. This is to avoid noise, and the wheel is to be firmly pinned.
Parts a b good for pulling backward
A machine toward the left is annotated a b a b, with the note that these are good for pulling backward. The letters mark the components that reverse the motion.
Columns of calculation
Columns of figures run down the right side of the sheet, including products such as 30000, 1500 and 7500 alongside smaller numbers. Stray totals 1200 and 24 appear in the margins near the machines.