Circular instrument dividing engine made by William Simms, London, England in 1842 has been modified over time (wooden stand made at the Science Museum, 1954). The cast gunmetal, 46-inch dividing plate, with 4320 divisions on a inlaid silver ring is signed and dated, ‘Troughton & Simms, London, 1842’. The engine is similar to that made by Edward Troughton in 1793.
Parts of a circular dividing engine, 4ft diameter, by Troughton and Simms, c. 1845.
Additional parts of a circular dividing engine, 4ft diameter, by Troughton and Simms, c. 1845 complete with a wooden stand built in the Museum in 1954. stand b
