An axle borne on two wheels, and a large geared wheel
A self-supporting pivot resting on rollers to ease friction
The sheet is dominated by a large toothed wheel meshing with a drum or lantern gear on a wooden stand, its axle labelled h, b, n, m, f. A short caption toward the foot announces the "invention of an axle that supports itself upon two wheels," and a smaller device at the lower right shows an axle carried between two wheels on a base — an anti-friction bearing arrangement. Further untranscribed writing is faintly visible on the right of the page.
On this page
Invention of an axle supported on two wheels
A caption presents the invention of an axle that supports itself upon two wheels. The small device at the lower right shows just such an axle resting between two wheels on a base, so that it rolls rather than rubbing in a fixed bearing.
Large toothed wheel driving a drum gear
The main drawing is a large wheel with many teeth on its rim, engaging a cylindrical drum or lantern gear, all set in a braced wooden frame. Its parts are keyed by the letters h, b, n, m, f.