Model: N16 Simple Ratchet Mechanism with Four-Bar Linkage

This is a square toothed wheel ratchet with two pawls: one to advance the wheel, and the other to check its reversal. The advancing pawl is moved by a crank-operated four-bar linkage. This model looks similar to model N-12, but operates on a different principle. This mechanism advances the wheel one tooth-pitch for every revolution of the crank. Thus, this is a counting device.

Francis Moon 2004-07-00

#### Reference :

- Reuleaux : Constructor (4th Ed. §254, 1893)
- Reuleaux, Kennedy : Kinematics of Machinery (?121, 1876)