Circular instrument dividing engine.

Made:: 1905 in London

Circular instrument dividing engine (Watts No. 1) made by George W. Watts, London, England in 1905. An automatic dividing engine, complete with test circle.

Details

Category:: Industrial Metrology

Object Number:: 1994-195

Measurements:: : 2 x 2 x 2 m

type:: circular dividing engine

credit:: Cambridge Museum of Technology

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Parts

Part of circular instrument dividing engine.

Watts No.1 automatic circular dividing engine, constructed by George. W. Watts in 1905

Measurements:: overall: 950 mm x 1900 mm x 1590 mm,

Object Number:: 1994-195 Pt1

type:: circular dividing engine and component - object

Part of circular instrument dividing engine

Part of circular instrument dividing engine

Test circle produced on the Watts No.1 automatic circular dividing engine, constructed by George. W. Watts in 1905. Sent to Germany to be tested, the scale engraved on the silver ring had an average error of only 0.5 seconds of arc, or one part in 2592000.