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Friction machine, 1762.

Lepine, John

Friction machine, 1762.
3 5 c m
actual image size: 32cm x 27cm


This machine shows that friction is due to weight acting on the moving parts, and also demonstrates the advantage of 'friction wheels': the rollers on which the axle rests. When the spoked wheel was spun, it would turn 'more than the space of a mile', according to George Adams, instrument maker to the king, who made the machine. Alternatively a watch spring could make the wheel oscillate. Friction was provided using the small bras lever and the number of oscillations with and without friction compared.

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