Friction demonstration engine, George Graham

1751 in London and Fleet Street
George Graham
Demonstration of friction bearings

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Demonstration of friction bearings
Science Museum Group
© The Board of Trustees of the Science Museum

Demonstration of friction bearings made by George Graham, Fleet Street, London, before 1751. Once belonged to Stephen Demainbray.

This machine belonged to Stephen Demainbray and was used by him in his lectures on natural philosophy. It had a spiral spring which was attached to the base and the axle. When it was wound and released the wheel made oscillations and the number of these could be counted when the axle rested on the friction wheels. The spring could also be removed, the wheel spun and the time taken for the wheel to come to a rest measured. Demainbray worked as superintendent at the King's observatory at Kew from 1768 and his collection of instruments and apparatus was absorbed into the King's own collection


King George III
Object Number:
brass, steel and mahogany
friction engine and physics demonstration equipment
King's College, London