Overhead and Side Views of an Advancing Bridge Frame
A bridge frame perhaps driven by screw action, with a rough windlass-and-chain platform
This sparse leaf carries only rough mechanical sketches and no transcribed text. In the outer margin is an overhead view of an advancing bridge frame, like the one on the previous page but perhaps driven forward by a screw rather than by a chain. A rough side view at the left shows an advancing platform with its windlass and chains, and ink stains mark the lower portion of the page.
On this page
Overhead view of an advancing bridge frame
In the outer margin an overhead view shows the frame of an advancing bridge, resembling the one on the previous leaf but apparently meant to be driven forward by a screw rather than by a chain.
Rough side view of an advancing platform
At the left a rough schematic side view sketches an advancing bridge platform together with its windlass and chains. Ink stains mark the lower part of the leaf.