ABSTRACT
Chains are, in general, used to transmit positive rotary motion from one shaft to another. There are many types of chains available, but here the authors are interested in using the chain as part of a mechanism so that a nonuniform motion can be obtained. The trick when using chains to obtain a nonuniform motion is to fasten a roller, a pin, or a slider to a chain link and then arrange the chain sprockets in such a way that a desired output motion is obtained. If an exact dwell is required, it is often necessary to support the motion of the chain-driven pin by steel or nylon rails, because it should be borne in mind that a chain is flexible when moving from one sprocket to another. When used as driving means for a mechanism, the length of the chain determines how many revolutions the driving sprocket must make in order for the motion to start all over again.
