This type of design can be used to create a mechanism where the direction of the restricted motion can be changed. above Figure, but in feed mechanisms such as used on many machine Ratchets composed from gears are typically round and are composed of uniform but asymmetric teeth designed to limit motion to a single direction. In another embodiment, the ratcheting mechanism 200 is disposed in the housing assembly 102. Check Price at Amazon. stop. overwinding. 1/cos. PAGE,