Drawing of a turret clock escapement

Harrison’s own manuscript drawing of his design for the escapement of the turret clock at Trinity College, Cambridge, for which he was paid three guineas in 1755. The escapement itself was then made by the London clockmaker William Smith. The clock does not survive (except the setting dial) but four other clocks by Smith are known which still have this escapement.

Object Details

ID: ZAA0881
Collection: Timekeeping
Type: Drawing
Display location: Not on display
Creator: Harrison, John
Date made: circa 1755
People: Smith, William
Credit: National Maritime Museum, Greenwich, London
Measurements: Frame: 600 x 455 x 27 mm

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