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Epicycloidal levers

1762

Double-ended trepanning lever

1601-1700
Compound lever demonstration model for explaining the function of different combinations of levers, unknown maker, before 1753. Once belonged to Stephen Demainbray.

Demainbray's compound lever

1701-1752
Compound Lever, consisting of 3 levers, 2 pivoted on single pillars, & 1 pivoted on cross-arm of 2 pillars, on wooden base (original brass balance weight missing).

Compound lever, 1762.

1762