Cam-wheel and trip-hammers (faint leadpoint study)
Transcribed recto f. 92r is blank; the drawn leaf carries untranscribed mirror-script.
In faint leadpoint the leaf shows a large wheel from which project several hammer-headed arms, arranged to be lifted in turn by a peg-studded drum, with a weight hanging on a cord at the right. Below are a pair of upright endless-screws (worms) meshing with toothed drums and a small boxed detail at the lower left. The e-Leo transcription records only that the facing recto (f. 92r) is blank; the drawn folio itself bears a passage of untranscribed mirror-script beside the machine.
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Peg-studded drum lifting a bank of hammers
A large wheel or drum carries radial arms ending in rectangular hammer-heads, set so that pegs on the turning drum raise each hammer in succession before it falls. The arrangement reads as a cam-and-hammer percussion mechanism.
Suspended weight and endless-screws below
A cord carries a hanging weight at the right, supplying the load or driving force, while two upright endless-screws mesh with toothed drums in the lower register beside a small boxed detail. The strokes are faint throughout, consistent with a leadpoint working drawing rather than a finished ink study.