I need a paper that explains how does a geneva wheel

I have a presentation tomorow, i have to speak for 10 minutes. I need a paper about how does geneva wheel works. from a mechanical point of view.

And how would we improve this product? what would we change? how ould that impact the final product performance and cost ? 

The paper doesnt have to be formal, as long as it is informative and enough to speak for 10 minutes.