Wheel and disc mechanism for a clock movement
A large toothed wheel, twin discs on a vertical shaft, and a geared hub detail; a note reads 'clock time'.
Mechanical studies in pen and ink: at the left a large wheel with radiating teeth and pierced, spoke-like openings hangs from a bracketed beam; at the centre two broad discs are mounted on a common vertical shaft within an upright frame; and at the right a cross-sectional detail of the geared hub is drawn, with a small boxed diagram below. A note at the upper margin labels the device as clock time, that is, a clock movement, and a numeral '4' appears near the centre.
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Toothed wheel identified as a clock movement
A large wheel with radiating teeth and pierced, spoke-like openings hangs from a bracketed beam at the left of the sheet. A marginal note identifies the assembly as clock time, a clock movement, and to its right two broad discs are set on a common vertical shaft within an upright frame.
Geared hub drawn in cross-section
At the right the hub of the mechanism is drawn in cross-section, showing the shaft, its bearings and the interlocking gear teeth. A small boxed diagram below the discs gives a further detail of the framed assembly.