Worm screw driving a toothed rack
A crisply drawn gear train raising a horizontal rack, with faint further studies on the sheet
The sheet is dominated by a clean ink drawing of a worm-and-gear mechanism at the top: a worm screw carried on two horizontal discs meshes with a large toothed pinion, which drives a long horizontal toothed rack running the width of the page. Beneath and around it are faint underdrawings and show-through of the hoisting frames and winches from adjacent folios, together with untranscribed writing at the right margin. No transcription is provided for this page, so no text is translated here; further handwriting appears to be present but was not supplied.
On this page
Worm screw, pinion and horizontal rack
A worm (endless) screw mounted between two horizontal discs engages a toothed pinion, which in turn drives a long horizontal rack — a gear train for converting rotary motion into powerful linear travel.